• Title/Summary/Keyword: 차량 안정성 제어

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Study on Improving Stability of 6×6 Skid-Steering Vehicle by Employing Skyhook Control Method (스카이 훅 제어를 이용한 6×6 견마 차량의 주행 안정성 향상 방안 연구)

  • Jeon, Su-Hee;Lee, Jeong-Han;Yoo, Wan-Suk;Kim, Jae-Yong
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.35 no.8
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    • pp.905-912
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    • 2011
  • In order to protect equipment such as controllers, it is important to improve the driving stability of $6{\times}6$ skidsteering vehicles driven on rough roads. The estimation and improvement of the driving stability should be based on the vertical acceleration, roll acceleration, and pitch acceleration. These variables will be used to achieve multivariable control and increase the vehicle driving stability. In this study, to improve vehicle stability by reducing the vertical acceleration, roll angular acceleration, and pitch angular acceleration, the skyhook control method is employed to control MR(Magnetorheological) dampers equipped with the vehicle. The proposed control system is tested in multibody dynamic simulation.

Development of Vehicle Integrated Dynamics Control System with Brake System Control (제동 장치를 이용한 차량통합운동제어시스템 개발)

  • Song, Jeonghoon
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.41 no.7
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    • pp.591-597
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    • 2017
  • This study is to develop a vehicle Integrated Dynamics Control System(IDCB) that can stabilize the lateral dynamics and maintain steerability. To accomplish this task, an eight degree of freedom vehicle model and a nonlinear observer are designed. The IDCB independently controls the brake systems of four wheels with a fuzzy logic control and a sliding model control. The result shows that the nonlinear observer produced satisfactory results. IDCB tracked the reference yaw rate and reduced the body slip angle under all tested conditions. It indicates that the IDCB enhanced lateral stability and preserved steerability.

Adaptive Variable Weights Tuning in an Integrated Chassis Control for Lateral Stability Enhancement (횡방향 안정성 향상을 위한 통합 섀시 제어의 적응 가변 가중치 조절)

  • Yim, Seongjin;Kim, Wooil
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.40 no.1
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    • pp.103-111
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    • 2016
  • This paper presents an adaptive variable weights tuning system for an integrated chassis control with electronic stability control (ESC) and active front steering (AFS) for lateral stability enhancement. After calculating the control yaw moment needed to stabilize a vehicle with a controller design method, it is distributed into the tire forces generated by ESC and AFS using weighted pseudo-inverse-based control allocation (WPCA). On a low friction road, lateral stability can deteriorate due to high vehicle speed. To cope with the problem, adaptive tuning rules on variable weights of the WPCA are proposed. To check the effectiveness of the proposed method, a simulation was performed on the vehicle simulation package, CarSim.

ITS 통신 표준화 활동 현황 및 전략

  • 장병수
    • TTA Journal
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    • s.68
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    • pp.14-18
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    • 2000
  • 우리 주변에는 휴대폰, PDA단말기, 무선호출기, 인터넷 등 다양한 매체를 통한 정보 전달의 수단이 많이 있다. ITS(Intelligent Transport System : 지능형 교통시스템)는 기존의 도로교통 기반시설에 차량제어와 정보통신기술이 접목되어 교통의 효율성과 차량 운행의 안정성, 에너지 절약 등 많은 사회 편익 서비스를 제공하고 또한 국가적으로는 자원을 절약할 수 있는 기술이다. ITS는 기존의 교통 기반시설에 정보통신과 차량제어 등의 기반시설과 기술을 연계시켜 교통의 효율성과 차량운행의 안전성, 에너지 절약 등을 목표로 한다. 매우 다양한 기술과 기반시설이 활용되므로 ITS가 교통문화와 산업체에 미치는 파급효과는 매우 크다. 본 고에서는 ITS의 여러 가지 분야 중에서 정보통신 분야의 국내외 동향 및 TTA TC06의 향후 방향에 대하여 기술하고자 한다.

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A Study on Braking and Driving Force Distribute Control for Active Traction Control System (능동 휠 토크 제어시스템 설계를 위한 제동력${\cdot}$구동력 배분제어에 관한연구)

  • Park Jung-hyen;Kim Soon-ho
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.9 no.6
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    • pp.1402-1406
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    • 2005
  • A study on the vehicle stability is discussed. In the field of the studies the electronic control systems help overcoming the limit of improvement in vehicle performance with the methods above. Driving stability is mainly incorporated with the later motion of a vehicle generated by the driver's steering input. Recently VDC system has been studieed in order to improve the active stability. This VDC system uses the active braking force. This paper propose the ATC that uses driving force. This paper compared VDC with ATC through an experiment.

Analysis of the Characteristics of ASMS Hydraulic Modulator (Automotive Stability Management System) (차량 안정성 제어용 유압 모듈레이터의 특성 해석)

  • Song, Chang-Seop;Kim, Hyoung-Tae;Shin, Sang-Won;Jeong, Tae-Chun
    • Journal of the Korean Society for Precision Engineering
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    • v.18 no.10
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    • pp.127-133
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    • 2001
  • In this study, the effect of the factors of a hydraulic modulator of ASMS was analysed. The modeling of ASMS was presented and the equation of ASMS was derived from the modeling. With this background, GUI analysis tool was developed. After the verification of the reasonability of simulation, the response of a hydraulic modulator is investigated through simulation of modeling. With this simulation, each behavior was predicted with changing the various parameters and determined the influenced factors to apply the designing process.

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Design of Vehicle Stability Control Algorithm Based on 3-DOF Vehicle Model (3자유도 차량모델 기반 차량 안정성 제어 알고리듬 설계)

  • Chung Taeyoung;Yi Kyongsu
    • Transactions of the Korean Society of Automotive Engineers
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    • v.13 no.1
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    • pp.83-89
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    • 2005
  • This paper presents vehicle stability control algorithm based on 3-DOF vehicle model. The brake control inputs have been directly derived from the sliding control law based on a three degree of freedom plane vehicle model with differential braking. The simulation has performed using a full nonlinear 3-dimensional vehicle model and the performance of the controller has been compared to that of a direct yaw moment controller. Simulation results show that the proposed controller can provide a vehicle with better performance than conventional controller with respect to brake actuation without compromising stability at critical driving conditions.

A Study on Improving Driving Stability System by Yaw Moment Control (요우모멘트를 통한 주행안정성 향상 제어 알고리즘에 관한 연구)

  • Park Jung-hyen;Kim Soon-ho
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.10 no.2
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    • pp.392-397
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    • 2006
  • This paper proposed yaw moment control scheme using braking and active rear wheel steering for improving driving stability especially in high speed driving. Its characteristics the unified chassis control system of two equipment that 4WS(4 Wheel Steering) and ESP(Electronic Stability Program). in this study the performance of the vehicle was compared each equipment. And conventional ABS and TCS can only possible to control the longitudinal movement of braking equipment and drive which can only available to control of longitudinal direction. There after new braking system ESP was developed, which controls both of longitudinal and lateral, with adding of the function of controlling Active Yaw Moment. On this paper, we show about not only designing of improved braking and steering system through establishing of the integrated control system design of 4WS and ESP but also designing of the system contribute to precautious for advanced vehicle stability problem.

Frequency Shaped Optimal Control of Semi-active Suspension System Using an MR Damper (자기유변유체를 이용한 반능동형 현가장치의 Frequency shaped 최적 제어)

  • 김기덕;이재형;전도영
    • The Korean Journal of Rheology
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    • v.11 no.2
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    • pp.112-121
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    • 1999
  • An MR(Magneto-Rheological) fluids damper is designed and applied to vibration suppression of a 1/4 car model. The damping constant of MR damper changes according to input current which is controlled in a semi-active way. Several control algorithms are compared in simulations and experiments. The advantage of the proposed Frequency shaped LQ control is that passenger comfort is emphasized in the range of 4~8Hz and driving safety is emphasized around the resonance frequency of unsprung mass.

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