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조타감 성능 목표 달성을 위한 모델 기반 MDPS 제어맵 최적화 설계
박영대(Youngdae Park),이병림(Byungrim Lee),장세현(Sehyun Chang),조현석(Hyunseok Cho),김민준(Minjun Kim),황상우(Sangwoo Hwang) 한국자동차공학회 2019 한국 자동차공학회논문집 Vol.27 No.9
The development of the steering feel performance of a vehicle is primarily carried out by tuning the motor-driven power steering(MDPS). The motor-driven power steering provides a lot of parameters for developers in order to maximize the steering feel performance. However, it needs a lot of time and effort, so the development efficiency is not favorable. In order to improve the development efficiency, this paper proposes an optimal design method and process of MDPS logic as follows. First is the definition of quantitative targets for multiple tests that may indicate steering feel performance, second is the construction of the vehicle and control model for checking the steering feel performance, and third is the process proposal to optimize the MDPS logic parameters. This method and process is validated through the comparison of the simulation and test results.
R&H 성능 최적화를 위한 다중해 기반 대화형 목표전계 기법 개발
장세현(Sehyun Chang),이병림(Byungrim Lee),박영대(Youngdae Park),조현석(Hyunseok Cho),김민준(Minjun Kim),황상우(Sangwoo Hwang) 한국자동차공학회 2019 한국자동차공학회 부문종합 학술대회 Vol.2019 No.5
This paper proposes Multiple-solution based interactive target cascading. Compared with a classical point-based design which is aimed to optimize an objective function subjected to given constraints, the proposed method performs sensitivity analysis for the range of design variables (DV) first. Then multiple solutions are obtained by performing optimization for subdivided target performance index (PI) range. The set of all data such as DV and PI is stored in database so that a designer can choose a best design set using DB query and data visualization which provides the insight of the connection between DV and PI graphically. The proposed multiple-solution based interactive target cascading is implemented to improve the vehicle handling performance, particularly enhancing frequency responses of sine sweep steer and maximize the linearity of lateral acceleration during constant radius cornering. It shows that the proposed approach may be useful not only for the conceptual stage in the early phases of vehicle development but also during the development stage to enhance vehicle performance.