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[차량운동성능부문] 지능형 현가장치의 제어로직에 관한 연구
소상균(Sang-Gyun So) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Automotive suspension system is a mechanism for isolation of the vibration coming from the road inputs. Recently, the electronically controlled suspension systems which may improve ride and handling performance have been developed.<br/> Here, the continuously controlled semi-active suspension system is focused. As a mechanism to control damping forces continuously, a solenoid valve is used. The modeling for the solenoid valve is introduced briefly. a vehicle dynamic modeling is constructed, and then combined system model is completed. To design the efficient control algorithm for the semiactive suspension system tile knowledge based fuzzy logic is applied and the technique how to apply the sky-hook theory 10 the fuzzy logic is developed. Finally, to confirm tile improvement of performance the computer simulation is carried out.
1/4 차량 현가 장치의 강인 안정성을 보장하는 외란관측기 기반의 제어 시스템 설계
소상균(Sang Gyun So),류정래(Jung Rae Ryoo),도태용(Tae-Yong Doh) 제어로봇시스템학회 2016 제어·로봇·시스템학회 논문지 Vol.22 No.12
The vehicle suspension system plays a very important part related with vehicle ride and handling. To improve the vehicle ride and handling many researches have been progressed from various damping parameter tuning techniques to the development of the electronic controlled suspension systems. In this paper, as one of the ride performance improvement a disturbance observer(DOB) based control system is applied to the quarter car vehicle model in order to show that the DOB can obtain good vibration isolation characteristics. First, the robust stability criterion for the DOB is introduced in detail, and then how DOB is applied to the 1/4 car vehicle model is represented, and finally to confirm the effectiveness of the DOB in vehicle ride performance improvement a computer simulation is carried out for various driving conditions.
EPS 제어시스템 장착 승용차의 통합적 시뮬레이션 기법 연구
장봉춘(Bong-Choon Jang),소상균(Sang-Gyun So) Korean Society for Precision Engineering 2006 한국정밀공학회지 Vol.23 No.6
Electric Power Steering(EPS) mechanism has become widely equipped in passenger vehicle due to the increasing environmental concerns and higher fuel efficiency. This paper describes the development of concurrent simulation technique and simulation integration technique of EPS control system with a dynamic vehicle system. A full vehicle model interacting with EPS control algorithm was concurrently simulated on a single bump road condition. The dynamic responses of vehicle chassis and steering system resulting from road surface impact were evaluated and compared with proving ground experimental data. The comparisons show reasonable agreement on tie-rod load, rack displacement, steering wheel torque and tire center acceleration. This concurrent simulation capability was employed for EPS performance evaluation and calibration as well as for vehicle handling performance integration and synthesis.
장봉춘(BongChoon Jang),소상균(Sang-Gyun So) Korean Society for Precision Engineering 2004 한국정밀공학회지 Vol.21 No.1
Most power steering systems obtain the power by a hydraulic mechanism. Therefore, it consumes more energy because the oil power should be sustained all the times. Recently, to solve this problem the electric power system has been developed and become widely equipped in passenger vehicles. In this research the simulation integration technique for an electric power steering system with MATLAB/SIMULINK and a full vehicle model with ADAMS has been developed. A full vehicle model interacted with electronic control unit algorithm is concurrently simulated with an impulsive steering wheel torque input. The dynamic responses of vehicle chassis and steering system are evaluated. This integrated method allows engineers to reduce the prototype testing cost and to shorten the developing period.