• 제목/요약/키워드: Semi-active Suspension System

검색결과 114건 처리시간 0.029초

MR 댐퍼 반능동 현가시스템의 승차감향상을 위한 수정된 민감도제어 (Modified Sensitivity Control of a Semi-Active Suspension System with MR-Damper for Ride Comfort Improvement)

  • 김태식;김내관;박재우;허창도;홍금식
    • 대한기계학회논문집A
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    • 제31권1호
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    • pp.129-138
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    • 2007
  • In this paper, a modified sensitivity control for the semi-active suspension system with a magneto-rheological (MR) damper is investigated. A 2-d.o.f quarter-car model together with a 6th order polynomial model for the MR damper is considered. For the purpose of suppressing the vertical acceleration of the sprung mass, the square of the vertical acceleration is defined as a cost function and a modified sensitivity control that updates the current input in the negative gradient of the cost function is proposed. The implementation of the proposed algorithm requires only the measurement of the relative displacement of the suspension deflection. The local stability of equilibria of the closed loop nonlinear system is proved by investigating the eigenvalues of the linearized ones. Through simulations, the passive suspension, the skyhook control, and the proposed modified sensitivity control are compared.

ER 유체를 이용한 상용차 운전석의 반능동형 현가 장치 (A Semi-Active Suspension Using ER Fluids for a Commercial Vehicle Seat)

  • 최정환;남무호;최승복;정재천
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 1997년도 춘계학술대회논문집; 경주코오롱호텔; 22-23 May 1997
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    • pp.394-399
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    • 1997
  • This paper presents a new concept of a semi-active suspension system for a commercial vehicle seat. The proposed suspension system features an ER(electro-rheological) damper which can produce continuously tunable damping forces by control electric fields. A dynamic model of the ER damper is first achieved by incorporating Bingham property of the ER fluid, followed by the formulation of governing equations of motion for the suspension system. A sliding mode controller is then designed on the basis of the hyper-plane sliding mode scheme. The effectiveness of the proposed control system is evaluated by investigating control performance for vibration isolation.

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DC Motor를 이용한 능동형 댐퍼 시스템에 대한 연구 (Study on Active Damper System Applying DC-Motor)

  • 이학철;전진용;정영석
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2008년도 하계학술대회 논문집
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    • pp.121-123
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    • 2008
  • The suspension systems currently in use can be classified as passive, semi-active and active. The passive suspension systems are the most commonly used due their low price and high reliability. However, this system cannot assure the desired performance form a modern suspension system. An important improvement of suspension performance is achieved by the active systems. This paper treats active damper system and applying DC-Motor. In this system, all the energy for active control is supplied from the damper, which regenerates energy. And simulations by sky-hook control.

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댐핑력 응답특성을 고려한 ER 현가장치의 반능동제어 (Semi-Active Control of ER Suspension System Incorporating with Dynamic Characteristics of Damping Force)

  • 한상수;최승복
    • 대한기계학회:학술대회논문집
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    • 대한기계학회 2000년도 춘계학술대회논문집A
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    • pp.452-457
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    • 2000
  • This paper presents control response of a semi-active electro-rheological(ER) suspension. After showing dynamic characteristics of the ER damper, 1/4 car model is formulated by incorporating with the time constant of the damping force. $H_{\infty}$ controller compensating mass and time constant uncertainties is then designed in order to suppress vibration level of the suspension. The control responses such as vertical acceleration are presented.

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디지털 댐퍼의 지능제어 특성 (Intelligence Control Characteristics of a Digital Damper)

  • 송준호;이육형
    • 한국기계가공학회지
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    • 제5권3호
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    • pp.5-10
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    • 2006
  • The objective of this paper is to investigate the Intelligence control characteristics of a digital damper. This paper deals with a two-degree-of-freedom suspension using the damper with ER fluid for a quarter vehicle system. The control law for semi-active suspensions modeled in this study is developed using passive and ANFIS control method. Computer simulation results show that the semi-active suspension with ER damper has good performances of ride quality.

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고속열차의 횡진동 제어 특성 연구 (A Study on Lateral Vibration Control Method of High-speed Train)

  • 김상수;김기환;박춘수;목진용;최성훈
    • 한국철도학회:학술대회논문집
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    • 한국철도학회 2008년도 춘계학술대회 논문집
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    • pp.969-974
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    • 2008
  • As the railway becomes higher, the reliable stability and riding comfort of higher railway are required. To improve the riding comfort of high-speed trains, it is very helpful to use active suspension system for railway. In Japan, the high-speed train, Shinkansen has adopted semi-active suspension system and now it is running in the main trunk. In this paper, the authors introduce several technical trends of vibration control methods of Japanese Shinkansen. And the installation of semi-active suspension to HSR 350x and the test result of test run on the Kyoung-Bu high speed ling are also explained. After development of HSR 350x, new R&D national project of high speed train is progressed by Ministry of Land, Transport, and Maritime Affairs. This project is the development of Electric Multiple Unit of high speed train with 400km/h of maximum test speed. These result would be helpful to progress next generation high speed project.

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전기변성유체를 이용한 연속가변 현수장치 시스템의 디자인 및 성능에 관한 연구 (A Study on the Design and Performance of Continuously Variable Suspension System using Electro-Rheological Fluids)

  • 장문석;김수태
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 1997년도 추계학술대회 논문집
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    • pp.543-546
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    • 1997
  • The purpose of this study is to investigate the ERSU(Electr0-Rheological Suspension IJnit) and some progress of damping force characteristic of a ERSU. This paper describes overall construction of th'e system design and the manufacturing of ERSU. A model of the ERSU is made by using electric field dependent on Bingham properities of ER fluid. In this paper. the ERSU is designed and manufactured for a light ground tracked vehicle. From the results, it is shown that the damping performance of ERSLJ is better than that of a passive suspension unit. This experimental study might be very useful for the simulat~on and the design of semi-active suspension units.

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Semi-active Damping Control for Vibration Attenuation: Maximum Dissipation Direction Control

  • Kim, Jeong-Hoon;Lee, Chong-Won
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2001년도 추계학술대회논문집 I
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    • pp.229-234
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    • 2001
  • A practical and effective semi-active on-off control law is developed for vibration attenuation of a natural, multi-degree-of-freedom suspension system, when its operational response mode is available. It does not need the accurate system parameters and dynamics of semi-active actuator. It reduces the total vibratory energy of the system including the work done by external disturbances and the maximum energy dissipation direction of the semi-active control device is tuned to the operational response mode of the structure. The effectiveness of the control law is illustrated with a three degree-of-freedom excavator cabin model.

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슬라이딩 섭동 관측기를 이용한 에어셀과 반능동 서스펜션의 통합 제어 (Integration Control of Air-Cell Seat and Semi-active Suspension Using Sliding Perturbation Observer Design)

  • 유기성;윤정주;이민철;유완석
    • 한국자동차공학회논문집
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    • 제12권3호
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    • pp.159-169
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    • 2004
  • In this study, integration control of air-cell seat and semi-active suspension is proposed to minimize the road-tyre force which can cause uncomfortable feeling to rider. The proposed integration control with sliding perturbation observer is consisted of air-cell seat control which uses the force generated by air-cell and the sky-hook control. The air-cell seat itself has been modeled as a 1 degree of freedom spring-damper system. The actual characteristics of the air-cell have been analyzed through experiments. In this paper, we introduces a new robust motion control algorithm using partial state feedback for a nonlinear system with modelling uncertainties and external disturbances. The major contribution of this work is the development and design of robust observer for the state and the perturbation. The combination skyhook controller and air-cell controller using the observer improves control performance, because of the robust routine called Sliding Observer Design for Integration Control of Air-Cell Seat and Semi-active Suspension. The simulation results show a high accuracy and a good performance.