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MATLAB simulation을 이용한 TPMS RF 성능 예측에 대한 연구
윤이내(Enae Yoon),장성민(Sungmin Jang) 한국자동차공학회 2015 한국자동차공학회 학술대회 및 전시회 Vol.2015 No.11
Since the safety regulation of tire is established, recently TPMS is rapidly spread in EU, USA and Korea. TPMS system use RF(Radio Frequency) to communicate between ECU and the sensor which is mounted in tire. Therefore RF performance is one of the most important factors in TPMS system. To check RF performance, 2 kinds of test are used. The first method is static test which gathers the RF power per wheel angle. The other way called dynamic test checks the MER(Message Error Rate) during the driving. However, sometimes only one kind of test is performed because the test schedule is not sufficient. In this case, rapid point of another test result assumption is necessary. Therefore in this study the dynamic test result is assumed with static test result, noise, and in-vehicle sensitivity. To suppose the dynamic test result, MATLAB simulation is employed. The result of message reception rate from MATLAB simulation is 90%, and dynamic test result from real vehicle is 92%. The error between simulation and vehicle test is under 2%. However in this study only achieve the simulation result of dynamic test. In the future, the opposite way estimated the static test result from dynamic test result would be accomplished.
TPMS RF system에 영향을 미치는 요인에 대한 연구
윤이내(Enae Yoon),장성민(Sungmin Jang) 한국자동차공학회 2014 한국자동차공학회 학술대회 및 전시회 Vol.2014 No.11
Recently in Automotive field, the concern of safety is rapidly increased. Since the grown the concern of safety in automotive field, Regulation of TPMS installation spread in worldwide. TPMS consists of sensor which is mounted on wheel to get the tire information and ECU received the information from sensor. To communicate between sensor and ECU, Radio frequency is used. Therefore the RF is core technology for TPMS operation. Since TPMS is applied, RF data which can affect TPMS operation is obtained by vehicle level experiment during development process. However the data of factors which can affect the RF performance after finished the vehicle development process is insufficient. In this study, we perform the vehicle level experiment to get the quantitative data about effect of factors on the RF performance. From the result of experiment, RF power is attenuated by Tire more than 10dB. Furthermore message reception rate is decreased more around 10% since aftermarket electronic device makes some noise.