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RISS 인기검색어
- 검색키워드
- 저자 : J. B. Song(송재복) (검색결과 33 건)
- 무료
- 기관 내 무료
- 유료
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스로틀 조절 방식에 기초한 TCS 슬립 제어 시스템의 HWILS 구현
송재복(J. B. Song),홍동우(D. W. Hong) 한국자동차공학회 1998 한국 자동차공학회논문집 Vol.6 No.3
Traction control systems(TCS) improve vehicle acceleration performance and stability. particularly on slippery roads through engine torque and/or brake torque control. This research mainly deals with the engine control algorithm based on adjustment of the engine throttle valve opening. Hardware-in-the-Ioop simulation(HWILS) is carried out where the actual hardware is used for the engine/automatic transmission and TCS controller. while various vehicle dynamics are simulated on real-time basis. Also, use of the dynamometer is made in order to implement the tractive force that a road applies to the tire. Although some restrictions are imposed mainly due to the capability of the dynamometer, simplified HWILS results show that the slip control algorithm can improve the vehicle acceleration performance for low-friction roads.<br/>
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송재복(J. B. Song),김효준(H. J. Kim),민덕인(D. I. Min) 한국자동차공학회 1997 한국 자동차공학회논문집 Vol.5 No.3
Accurate positioning of a throttle valve is required to implement the traction control system (TCS) which improves acceleration performance in slippery roads. In this research, position control system is developed for the main throttle actuator(MT A) system which uses one throttle actuation for small volume and DC servo motor for fast response. In order to drive DC motor, PWM signal generator and PWM amplifier were built and interfaced to the motor and controller. Digital PID control law is used as basic control algorithm. In order to prevent overshoot and improve accuracy, velocity profiles are generated and implemented whenever the target throttle angle is given from the TCS controller. Thanks to velocity profiles, the control performance was very good and only one set of PID gains was used to cover the entire operating range. Also, the resolution of position is about 0.40, which is better than that of stepping motor also used as throttle actuator in some products. The response time of the developed system is also fast enough to implement the engine control based TCS algorithm.
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PID 제어에 기초한 스로를 액츄에이터의 위치 제어 시스템 개발
송재복(J. B. Song),김효준(H. J. Kim),민덕인(D. I. Min) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.11_1
Accurate positioning of a throttle valve is required to implement the traction control system(TCS) or cruise control system. In this research, position control system is developed for the main throttle actuator(MTA) system which uses one throttle actuation for small volume and DC servo motor for fast response. Digital PIDcontrol law is used as basic control algorithm. In order to prevent overshoot and improve accuracy, velocity profiles are generated and implemented whenever the target throttle angle is given from the TCS controller. Thanks to velocity profiles, the control performance was very good and only one set of PID gains was used to cover the entire operating range. The response time of the developed system is also fast enough to implement the engine control based TCS algorithm.
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엔진맵을 이용한 스로를 조절 방식 TCS 슬립 제어 시스템
김병철(B.C.Kim),송재복(J.B.Song) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.6_2
A TCS slip control system improves acceleration capability on slippery roads through engine torque and/or brake torque control. This research mainly deals with the engine control algorithm via the adjustment of the engine throttle angle. In this research two control strategies are investigated and compared:one approach is to directly estimate the throttle angle as an output of the slip controller,while the other is to obtain the target engine torque from the slip controller and then estimate the throttle angle based on the engine performance map. Various simulation have been carried out.The results show that the latter approach may compensate for the inherent nonlinearity between variation of the throttle angle and variation of the engine torque and possibly better performance than the former, however, both approaches can produce relatively good control performance.<br/>
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트로틀 밸브 조정에 의한 엔진/자동 변속기의 자동 류닝 PI 제어 시스템
장종호(J. H. Chang),홍동우(D. W. Hong),송재복(J. B. Song) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.6_1
This research aims at developing speed control system of the engine/automatic transmission system, in which the throttle valve opening is selected as an input and the driving axle speed as an output. In order to overcome the tedious tuning process, automatic tuning technique is attempted to select the gains of a PI controller. The process consists of two parts, one is to estimate the parameters of the system and the other is to design the PI controller based on root locus method. From a series of closed-loop experiments, the PI speed control system designed this way shows relatively good performance on tracking and disturbance rejection properties.
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트로틀 조절 방식에 의한 차량의 직진 슬립 제어 시뮬레이션
장종호(J.H.Chang),송재복(J.B.Song) 한국자동차공학회 1995 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1995 No.11_1
Slip(or traction) control system improves the vehicle steerability and stability, particularly on slippery roads through engine torque and/or brake torque control. This research mainly deals with the engine control algorithm via the adjustment engine throttle valve opening. The nonlinear engine model and simplified model of the automatic transmission have been used in simulations. Based on the error between the target driving wheel speed and actual driving wheel speed, PI controller with antiwindup computes the throttle angle required for optimum slip ratio which guarantees the best acceleration performance. Various simulations show that slip control algorithm can improve the vehicle longitudinal acceleration performance for various road and operating conditions.<br/>
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SMA을 이용한 3차원 차원 형상제시기의 와이어프레임 구동 유닛
추용주(Y. J Chu),김영민(Y. M. Kim),송재복(J. B. Song),박신석(S. S. Park) 한국정밀공학회 2006 한국정밀공학회 학술발표대회 논문집 Vol.2006 No.5월
This research proposes a novel method of shape display to present 3-dimensional objects. Shape displays allow us to feel the actual volume of the object, unlike conventional 2D visual displays of 3D objects. The proposed method employs a wire frame structure to present 3D objects. The wire frame is composed of small units driven by shape memory alloy (SMA) actuators. The drive unit is analogous to the agonist-antagonist system of animal musculoskeletal systems, where the SMA actuators serve as agonist and antagonist muscles. The force in the SMA actuator is controlled by electrical current. The drive unit is equipped with the locking mechanism so that it can sustain the external force exerted by the user as well as the own weight of the wire frame structure. By controlling the current into the SMA actuator and locking mechanism, we can control the angle of the drive unit. A chain of drive units enables presentation of 2 dimensional objects. 3 dimensional presentations are possible by collecting the chains of drive units.
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