Reactive Power Based Rotor Resistance Estimation Engineering Essay Free Essays

Abstract-In this paper, a elaborate survey on the Model Reference Adaptive Controller ( MRAC ) using the reactive power is presented for the on-line appraisal of rotor opposition to keep proper flux orientation in an Indirect Vector Controlled Induction Motor Drive. Choice of reactive power as the functional campaigner in the MRAC automatically makes the system immune to the fluctuation of stator opposition. Furthermore, the alone formation of The MRAC with the instantaneous and steady-state reactive power wholly eliminates the demand of any flux appraisal in the procedure of calculation. We will write a custom essay sample on Reactive Power Based Rotor Resistance Estimation Engineering Essay or any similar topic only for you Order Now Therefore, the method is less sensitive to integrator-related jobs like impetus and impregnation ( necessitating no integrating ) . Simulation consequences have been presented to corroborate the effectivity of the technique. THE indirect field oriented ( IFO ) -controlled initiation motor ( IM ) thrust is widely used in high public presentation industry applications [ 1 ] , [ 2 ] due to its simpleness and fast dynamic response. However, feedforward accommodation of the faux pas frequence, which requires rotor opposition, makes this scheme dependant on machine parametric quantities. Of all the parametric quantities, the rotor opposition undergoes considerable fluctuation and if attention is non taken to counterbalance for the alteration, the flux orientation is lost, ensuing in matching between the d- and q-axes variables. As is good known, the yoke makes the public presentation of the thrust system sulky. Attention is focused to implement field orientation through on-line appraisal of the machine parametric quantities [ 3 ] – [ 6 ] . Many on-line parametric quantity appraisal strategies are available in literature [ 7 ] – [ 20 ] . They are loosely classified as follows Spectral analysis technique Observer based techniques Model mention adaptive system based techniques Heuristic methods Reactive power based technique In one category of method, appraisal of rotor clip changeless is done utilizing the spectral analysis techniques. This group of methods is based on the measured response to a intentionally injected trial signal or an bing characteristic harmonic in the voltage/current spectrum. Stator currents and electromotive forces of the motor are sampled and the parametric quantities are derived from the spectral analysis of these samples. The 2nd categorization of rotor opposition designation strategy used observer based techniques. Most of the methods have used the Extended Kalman Filter, which is a computationally intensive technique [ 11 ] and [ 12 ] . Loron and Laliberte describe the motor theoretical account and the development and tuning of an drawn-out Kalman filter ( EKF ) for parametric quantity appraisal during normal runing conditions without presenting any trial signals. The proposed method requires terminal and rotor velocity measurings and is utile for car tuning an indirect field-oriented accountant or an adaptative direct field-oriented accountant. Zai, DeMarco, and Lipo propose a method for sensing of the reverse rotor clip changeless utilizing the EKF by handling the rotor clip changeless as the 5th province variable along with the stator and rotor currents. The drawbacks are that this method is computationally intensive. The 3rd group of online rotor opposition version methods is based on rules of theoretical account mention adaptative control. This is the attack that has attracted most of the attending due to its comparatively simple execution demands [ 13 ] and [ 14 ] . In add-on to the above methods, there are besides a few techniques proposed which can non be classified in the above three classs. These may be based on the measuring of steady province stator electromotive force, current and motor velocity, the rotor opposition can so be calculated algebraically from the equations derived. These methods are grouped to be Heuristic methods. The chief drawback for the above techniques is that the Rotor Resistance depends on vitamin D and q axis axis rotor flux which in bend depends on Stator Resistance. Therefore if any mistake occurs in the Stator Resistance, the truth of rotor flux deteriorates which in bend affects the truth of estimated Rotor Resistance. Reactive power based rotor opposition calculator [ 1 ] overcomes the disadvantage of above job. Choice of reactive power as the functional campaigner in the Model Reference Adaptive Controller ( MRAC ) automatically makes the system immune to the fluctuation of Stator Resistance. The alone formation of the MRAC with the instantaneous and steady-state reactive power eliminates the demand of any flux appraisal in the procedure of calculation. 2. MRAS based rotor opposition appraisal for vector controlled initiation motor thrusts The parametric quantity can be calculated by the theoretical account mention adaptative system ( MRAS ) , where the end product of a mention theoretical account is compared with the end product of an adjustable or adaptative theoretical account until the mistakes between the two theoretical accounts vanishes to zero. The mistake signal is used to drive an adaptative mechanism ( PI or I controller ) which provides rectification of the rotor opposition. In MRAS, the works ‘s response is forced to track the response of a mention theoretical account, irrespective of the works ‘s parametric quantity fluctuation and burden perturbation consequence. Such a system is defined as a robust system. The mention theoretical account may be fixed or adaptative. Choice of reactive power as the functional campaigner in the Model Reference Adaptive Controller ( MRAC ) automatically makes the system immune to the fluctuation of Stator Resistance. The alone formation of the MRAC with the instantaneous and steady-state reactive power wholly eliminates the demand of any flux appraisal in the procedure of calculation. Therefore, the method is independent of Stator Resistance appraisal and integrating impetus jobs. Fig 1 Basic construction of MRAS In the proposed MRAC ( Fig. 1 ) , the mention theoretical account and adjustable theoretical account compute instantaneous reactive power ( ) and steady-state reactive power ( ) severally. Note that the mention theoretical account is independent of slip frequence ( ) whereas the adjustable theoretical account depends on ( ) . The mistake signal ( ) is fed to the version mechanism block, which yields estimated slip velocity ( ) . Rotor opposition ( ) is so computed from ( ) . 2.1 Theoretical Development of the Proposed Scheme The vitamin D and q axis electromotive forces for IM mentioning to the synchronously revolving ( I†°e ) mention frame can be expressed as ( 1 ) ( 2 ) The instantaneous reactive power ( Q ) can be expressed as ( 3 ) Substituting ( 1 ) and ( 2 ) in ( 3 ) , the new look of Q is ( 4 ) It is worthwhile to advert that the above looks of Q are free from stator opposition, which is a noteworthy characteristic of any reactive power-based strategy. In steady province the derivative footings are zero. Therefore, the look of estimated reactive power ( ) is obtained as reduces to ( 5 ) 2.2 Evaluations and Parameters of Induction Motor The parametric quantities of the initiation machine used for simulation are given in the Table shown below. Table 2.3 Parameters of 2.2KW 150V, 50Hz 6 Pole Induction Machine Parameters Valuess Stator Resistance ( Rs ) Rotor Resistance ( Rr ) Magnetizing Inductance ( Lm ) Stator Inductance ( Ls ) Rotor Inductance ( Ls ) Inertia Jtot Clash B Rated Current Rated Torque 6.03I © 6.085I © 0.4893H 0.5192H 0.5192H 0.007187Kgm2 0.0027Kgm2/s 2.9Amps 7.5Nm 2.3 Simulation Consequences The Performance of MRAS based rotor opposition calculator utilizing reactive power method for vector controlled initiation motor thrusts is analyzed with assorted alterations in rotor opposition for the operating status of 415V/50Hz with rated burden torsion of 7.5Nm With 100 % measure alteration in Rotor Resistance. With 100 % incline alteration in Rotor Resistance. With 100 % trapezoidal alteration in Rotor Resistance Fig 2 Actual and Estimated Rotor Resistance for 100 % measure alteration Rr Fig 3 Actual and Estimated Rotor Resistance for 100 % incline alteration Rr Fig 4 Actual and estimated rotor opposition for 100 % trapezoidal alteration Rr From the consequences, it is observed that estimated rotor opposition is tracking with existent rotor opposition. MRAS based Rotor opposition calculator utilizing reactive power method is studied and designed for vector controlled initiation motor thrusts. The public presentation of rotor opposition calculator utilizing reactive power is analyzed extensively for assorted alterations in rotor opposition. From the consequences obtained, it is observed the mistake between that existent and estimated rotor opposition is ever found to be less than 0.9 % and the subsiding clip is found to be about 1 sec. 3. Analysis of vector controlled drive public presentation with and without calculator Vector control is besides known as the â€Å" field oriented control † , â€Å" flux oriented control † or â€Å" indirect torsion control † . Using field orientation ( Clarke-Park transmutation ) , three-phase current vectors are converted to a planar rotating mention frame ( d-q ) from a 3-dimensional stationary mention frame. The â€Å" vitamin D † constituent represents the flux bring forthing constituent of the stator current and the â€Å" Q † constituent represents the torsion bring forthing constituent. These two decoupled constituents can be independently controlled by go throughing though separate PI accountants. The end products of the PI accountants are transformed back to the 3-dimensional stationary mention plane utilizing the opposite of the Clarke-Park transmutation. The corresponding shift form is pulse breadth modulated driving a Voltage beginning Inverter. This control simulates a individually exited DC motor theoretical account, which provides an first-class torque-speed curve. The transmutation from the stationary mention frame to the revolving mention frame is done and controlled with mention to a specific flux linkage infinite vector ( stator flux linkage, rotor flux linkage or magnetising flux linkage ) . In general, there exists three possibilities for such choice and hence, three different vector controls. They are: Stator flux oriented control, Rotor flux oriented control and magnetising flux oriented control. As the torsion bring forthing constituent in this type of control is controlled merely after transmutation is done and is non the chief input mention, such control is known as â€Å" indirect torsion control † . The most ambitious and finally, the confining characteristic of the field orientation, is the method whereby the flux angle is measured or estimated. Depending on the method of measuring, the vector control is divided into two subcategories: direct and indirect vector control. In direct vector control, the flux measuring is done by utilizing the flux feeling spirals or the Hall devices. This adds to extra hardware cost and in add-on, measuring is non extremely accurate. Therefore, this method is non a really good control technique. The more common method is indirect vector control. In this method, the flux angle is non measured straight, but is estimated from the tantamount circuit theoretical account and from measurings of the rotor velocity, the stator current and the electromotive force. One common technique for gauging the rotor flux is based on the faux pas relation. This requires the measuring of the rotor place and the stator current. With current and place detectors, this method performs moderately good over the full velocity scope. The most high-performance VFDs in operation today employ indirect field orientation based on the faux pas relation. The advantages of the vector control are to better the torsion response compared to the scalar control, full-load torsion near to zero velocity, accurate velocity control and public presentation nearing DC thrust, among others. This chapter gives complete inside informations about indirect vector control strategy. Fig 4 Vector controlled Induction Motor Drives The indirect field oriented control presented here is rotor flux oriented control. Figure 4 shows the complete schematic of rotor opposition appraisal for indirect field oriented control of initiation motor thrusts. The torsion bid is generated as a map of the velocity mistake signal, by and large processed through a PI accountant. The torsion and flux bid are processed in the computation block. The three stage mention current generated from the functional block is compared with the existent current in the hysteresis set current accountant and the accountant takes the necessary action to bring forth PWM pulsations. The PWM pulsations are used to trip the electromotive force beginning inverter to drive the Induction motor. 3.3 Simulation Consequences The IFOC thrust public presentation is analyzed without and with calculator for the operating status. Reference speed = 100rad/sec Reference rotor flux = 0.9wb Load torsion = 7.5Nm ( invariable ) Rotor Resistance = 100 % measure alteration in rotor opposition is given at 1 2nd. 3.3.1 Simulation consequence for decoupled stator current for runing status I with and without rotor opposition calculator Fig 3.3 vitamin D and q axis of stator current for runing status I without Rr calculator Fig 3.4 vitamin D and q axis of stator current for runing status I with Rr calculator 3.3.2 Simulation consequence for torsion for runing status I with and without rotor opposition calculator Fig 3.5 Actual and mention torsion for runing status I without Rr calculator Fig 3.6 Actual and mention torsion for runing status I with Rr calculator 3.3.3 Simulation consequence for rotor flux for runing status I with and without rotor opposition calculator Fig 3.7 Actual and mention rotor flux for runing status I without Rr calculator Fig 3.8 Actual and mention rotor flux for runing status I with Rr calculator 3.5 Significance of Estimation clip on the thrust public presentation In the execution of the calculators, the clip taken for appraisal is an of import parametric quantity. Faster tracking will take to better dynamic public presentation. The cost of the calculator should be low to maintain the cost of the thrust system within the allowable degrees. Hence a survey on the thrust public presentation has been done for assorted appraisal times and the torsion and the flux responses are observed. The consequences are tabulated in Table 3.2 and 3.3. The appraisal clip decides the transeunt public presentation indices like settling clip and peak wave-off in both torsion and flux responses of the vector controlled thrust. The appraisal mistake has less impact on the transeunt public presentation. However the steady province mistake in both torsion and flux response chiefly decided by the appraisal mistake. The thrust public presentation is analyzed with assorted calculators in which the appraisal mistake is kept changeless at 1 % and clip of appraisal is varied. The appraisal mistake and appraisal clip of the vector controlled initiation motor thrust is analyzed for the operating status for mention velocity 100rad/sec, mention rotor flux 0.9wb, the rated burden torsion ( 7.5Nm ) is reduced to 5.5Nm,40 % measure alteration in rotor opposition is given at 2 second.From this the transeunt response in torsion and flux are studied. Table 3.3 Flux Response for Various Estimation Times Table 3.2 Torque Response for Various Estimation Times ESTIMATION TIME ( sec ) Settling TIME ( sec ) PEAK OVERSHOOT ( % ) No hold – – 8*10-3 0.2 0.45 20*10-3 0.23 1.55 30*10-3 0.25 4.95 80*10-3 0.27 6.75 100*10-3 0.55 8.29 1 1.2 11.25 ESTIMATION TIME ( sec ) Settling TIME ( sec ) PEAK OVERSHOOT ( % ) No hold – – 8*10-3 0.11 2.95 20*10-3 0.14 6.55 30*10-3 0.17 10.72 80*10-3 0.2 16.33 100*10-3 0.55 16.55 1 1.15 16.65 Table 3.5 Flux Response for Various Estimation Mistakes Table 3.4 Torque Response for Various Estimation Mistakes ESTIMATION ERROR ( % ) Steady STATE ERROR ( % ) 0 0 0.4 0 1 0.26 1.5 0.44 2 0.65 3 0.71 5 1.03 ESTIMATION ERROR ( % ) Steady STATE ERROR ( % ) 0 0 0.4 0 1 0.39 1.5 0.50 2 0.70 3 0.95 5 1.11 Similarly with same runing conditions the steady province analysis of the torsion and flux response of the thrust can be done by holding the appraisal clip as changeless with assorted appraisal mistakes. The public presentation is studied with a changeless appraisal clip of 20ms. The Torque and the flux responses for the above conditions are tabulated in Table 3.4 and 3.5. The bold Numberss shown in table 3.2, 3.3, 3.4 and 3.5 are the optimal allowable values of the appraisal clip and appraisal mistake. It is obvious that as the appraisal clip and the appraisal mistake are increased the thrust public presentation is being deteriorated. However it is quiet appealing to settle down with the maximal allowable appraisal clip and appraisal mistake, so that the thrust public presentation is satisfactory. Therefore from the consequences it can be concluded that the public presentation of the thrust is satisfactory with the maximal appraisal clip of 20ms and an appraisal mistake of 1.5 % . 4. Decision The MRAS based Rotor opposition calculator utilizing reactive power method is studied and designed for vector controlled initiation motor thrusts. The public presentation of rotor opposition calculator utilizing reactive power is analyzed extensively for assorted alterations in rotor opposition. From the consequences obtained, it is observed the mistake between that existent and estimated rotor opposition is ever found to be less than 0.9 % and the subsiding clip is found to be about 1 sec. The public presentation of Vector Controlled Induction Motor Drive with and without Rotor Resistance calculator is studied. From the consequences, it is observed that the without rotor opposition calculator, the decouple control is lost which leads to important deteriorates in the public presentation of vector controlled initiation motor thrusts while with rotor opposition calculator, the decouple control is achieved and the public presentation of IFOC is truly enhanced. The maximal allowable appraisal mistake and appraisal clip for rotor opposition appraisal that does non deteriorate the public presentation of IFOC is found to be 1.5 % and 20ms severally. How to cite Reactive Power Based Rotor Resistance Estimation Engineering Essay, Essay examples

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As the economy is rapidly booming in Asian countries, this has affected McDonalds business in various ways. The table below shows the number of McDonalds restaurants that operate in Asian countries. From 2000 to 2010, with an average quarterly GDP growth of 1.29 percent, Indonesias gross domestic product (GDP) has expanded at an annual rate of 3.45 percent in the last reported quarter (TradingEconomics.com, 2010a). This happened because as the largest national economy in Southeast Asia, government of Indonesia plays a significant role by owning more than 164 state-owned enterprises and at the same time, they also control the prices of several basic goods such as fuel, rice, and electricity (TradingEconomics.com, 2010). As the economy in the country is growing, McDonalds has taken this opportunity to expand its business in the country. From the table above, there are only 75 McDonalds restaurants available in Indonesia compared to 1 restaurant in Brunei. This happened because of the economic growth and the government proposal to increase the employment rate in Indonesia. With this decision made by McDonalds, it has not only increases their reputation in the country but also has decreased the unemployment rate in the country from 9.75 percent in January 2007 to 7.41 percent in January 2010 (TradingEconomics.com, 2010b). Another positive impact of globalization to McDonalds is due to the technological factor. Technological factor refers to what is happening technology-wise which can impact what a company do (CIPD, 2010). As new technologies are continually being developed, changes are made by McDonalds to improve its performance in the industry. According to EngineeringTalk.com (2010), McDonalds has decided to use Echelons LonWorks technology produced in San Jose, United States to meet its goal which is to lower energy consumption and at the same time increase its operational efficiency. McDonalds is encouraging its kitchen equipment manufacturers to include this technology in new equipment for its restaurants (Environmentalleader.com, 2010). McDonalds Vice President of Corporate Responsibility, Bob Langert, says that the technology will enable their franchisees to create a working environment which is easier to operate, facilitate preventive maintenance and provide new services and at the same time save the energy (EngineeringTalk.com, 2010). It also said that with the presence of Echelons power line networking technology, McDonalds can provide communication and data exchange between various pieces of kitchen equipment in its restaurants and this is to allow the development of business process improvement applications, manage energy use, and reduce maintenance costs (EngineeringTalk, 2010). In a globalized era today, import and export between countries are becoming easier (reference). This is because Therefore, Echelons power line networking technology which was produced in San Jose, United States can be accessed by countries such as India, Philippines, Hong Kong, Taiwan and Singapore easily. As a result, besides benefiting McDonalds financial, this will also increases the countrys FDI rate. Besides economical and technological factor, sociological factor also plays a role in pushing McDonalds in the industry. Sociological factor refers to what is occurring socially in a market in which a company operates in (CIPD, 2010). Sociological factor includes population growth rate, health consciousness, cultural norms, and career attitudes (CIPD, 2010). Negative impacts In contrast to positive impacts, negatives impacts are those activities that can decrease the level of competitiveness of a company in a particular market. However, by making the right decision and action, negative impacts can bring advantages to the company. Similar to positive impacts, negative impacts are also happen because of PESTLE (politics, economics, social, technology, legal and environment) factors. One of the biggest negative impacts of globalization to a fast food restaurant like McDonalds is due to the sociological factor. As mentioned earlier, sociological factor is one of the six external influences that a company has to cope with in order to compete in the market effectively (Wall, et.al., 2010). As a fast-growing company that has franchisees all around the world, McDonalds has also decided to expand its business to India. However, for a country which 20% of its population are vegetarian and around 82% does not eat beef, McDonalds might face problems in attracting its customers. This is because they are either vegetarian, cow- worshipping or non-beef-eating people (Kannan, 2006). Hence, as the worlds largest beef-based food chain, McDonalds may face difficulties in setting up a business where most of its residents do not consume beef. After realizing the problem that they might face, McDonalds has decided to modify its menu to suit the locals needs. Besides Indianizing its menu, McDonalds also offers several products that are only available in India. They are the Maharaja Mac, McAloo Tikki, and McVeggie. Maharaja Mac is the substitute of hamburger which is made from a 100% ground lamb burger that is served with lettuce, tomatoes, special sauce, cheese, onion and pickles on a sesame bun. On the other hand, McAloo Tikki and McVeggie are the products offers by McDonalds with a 100% pure veg stamp on them to the Indians (Kannan, 2006). In addition, to avoid from offending Indias vegan sensibilities, McDonalds strictly segregated it foods into vegetarian and non-vegetarian lines and even the mayonnaise has no egg in it (Harding, 2000). Today, there are more than 58 McDonalds restaurants that are successfully operate in India and according to a study that has been made, McDonalds revenue has increased 50% annually since 1997 (Kannan, 2006). According to the statement above, it shows that McDonalds has successfully overcome the problem that they are facing in India by adapting its local culture. At the same time, McDonalds has also increases its sales revenues and the Indians awareness on the presence of the McDonalds in the world. Besides the social factor, another negative impact of globalization has brought to McDonalds is due to the economical factor. In a globalize era today, besides the existing competitors such as KFC, Wendys and AW, there are numbers of potential entrants has joined the industry. This has led to a rapid growth of fast food restaurant all around the world. Hence, as one of the biggest fast food restaurants, the problem that McDonalds has to face is on how to attract more customers to consume its products. The reason is that, with more fast food restaurants available, consumers can make decision on which fast food restaurants products to be consumed according to their choices. In order to overcome the problem stated above, McDonalds has decided to do a limited time promotions that can attract its existing as well and the new customers. In Malaysia, one of the promotions that McDonalds has came up with to overcome the problem is by offering the McValue Lunch package. According to McDonalds (2010a), the McValue Lunch offers 10 most favourite menus among customers with a cheaper price from 12pm to 3pm every day. The price range for a set of McValue Lunch which includes a French fries as well as carbonated soft is between RM5.95 to RM8.95 per set (McDonalds, 2010a). As a result to the promotion done by McDonalds to attract more customers, today there are more people consumed its products since the promotion was introduced in February 2009. Another negative impact of globalization that McDonalds has successfully overcome is due to the legal factor. According to CIPD (2010) legal factor refers to what is happening with changes of legislation. Legal factor may affect the employment, imports/exports, quotas as well as resources of the country that a company have to deal with. One of the legal problems that McDonalds have to face is the religious law. For McDonalds to operate in an Islamic country, one of the laws that McDonalds has to face is the religious law. This law does not only apply in Malaysia but all Islamic countries all around the world. According to the religious law in the Malaysia, all restaurants that operate in the country have to have HALAL certificates that are produced by Jabatan Agama Islam Malaysia (Jakim). With this standard for foods, it shows that all the products produced by the company are not only 100% free from pork but it also covers the production, preparation, handling and storage of the food. Besides that, with this certificate it shows that the foods produced are safe to be consumed, hygienic and healthy for consumers (Hayati, et.al., 2008). Besides that, an Islamic country like Malaysia, McDonalds have decided to call its hamburgers as Beefburger to avoid the word ham. This is because ham is the thigh of the hind leg of certain animals, especially a pig (FreeDictionery.com, 2010). As a Muslims country with 60.4% of its people are Muslims (NationMaster.com, 2010), hamburgers are called Beefburger to show that the burgers are not made with pork and to avoid misunderstanding between the population in the country. Potential Impacts of globalization and strategies to overcome them Besides all the impacts that have been discussed above, there are still other impacts that McDonalds might have to face in the future. As similar to the impacts mentioned earlier, McDonalds potential impacts of globalization are also due to the external influences towards the company and decision has to be made to overcome them. One of the potential impacts of globalization to McDonalds is due to the economical factor. As the economy in China is growing rapidly, China is also experiencing a food inflation crisis. According to Fullick (2010) a report cited that the rapid food price increase is the main economic problem faced by the country at present. Fullick (2010) also says that food, which makes up about a third of Chinas consumer price index has increased by 10.1 percent compared to non-food items which increased just by 1.6 percent. As KFC and Pizza Hut kept their price unchanged, McDonalds has taken their first step in overcoming the food inflation crisis that are facing China by raising its menu prices by 0.5 yuan to 1 yuan per item (Kwok, 2010). McDonalds (China) Co Ltd spokeswoman said that the adjustment was made because some of the materials prices have increased due to the food inflation. As a number of analysts believe that Chinas GDP is not just slowing but could also dries up its exports, McDonalds which had 1 135 stores in China has ignore all that and planning to open about 500 restaurants in China in three years time (McIntyre, 2009). The reason is that, McDonalds is optimistic about the business prospects in China and for a company that has the balance sheets and cash flows to take the risk, McDonalds sees this downturn as an opportunity to push itself into a new market. Based on McDonalds point of view, as Chinas economy recovers, they have already taken market share in a country that is bound to see relatively rapid population growth and relatively strong GDP over the next several decades (McIntyre, 2009). Another potential impact of globalization to McDonalds is due to sociological factor which is health consciousness. As mentioned by Ronald McDonald (2004), Sugeon General David Satcher has said that fast food is a major contributor to obesity epidemic. With this statement, it has been agreed that fast food may cause obesity and overweight among people. According to figure 1.1 below, number of American adults that are facing obesity as well as overweight has increased since 1973. The statistic shows that since 1973 to 2009, number of obese in America has increased by 20 percent which make the number of obese adults in America today to be more than . people (reference). On the other hand, figure 1.2 shows the number of French adults that are facing obesity has also increased since . As a conclusion, with the evidences given above, due to the increase of fast food restaurants, number of obesity cases has also increased all around the world. As people all around the world are becoming more aware about their health, McDonalds might lose its customers and this will lead to a decrease of its sales revenues. Hence, strategies need to be done by McDonalds to avoid this issue from spreading and resulting to its failure in the future. One of the strategies that can be done by McDonalds is by offering more healthy food to the customers such as salad. Even though the menu offered by McDonalds today have a high nutrition value for a balance life, by offering variety of healthy food will attract the health conscious customers to consume its products. By doing so, it will not only increase McDonalds reputation but it will also decrease the obesity rate all around the world. Conclusion As a conclusion, globalization does influence a company performance in the industry that they are venturing in. These influences can either bring a good impacts or bad impacts to a company. Thus, for the company to succeed in a globalized world today, proper planning and decision-making has to be made by the company to overcome all of the negative impacts caused by globalization. As one of the major company in the fast food industry, McDonalds has been affected by globalization in many ways. However, due to the critical thinking and decision-making made by its manager, McDonalds has successfully overcome all the obstacles and this has increase their reputation in the eye of the world.