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Article Navigation> JOURNAL OF BEIJING INSTITUTE OF TECHNOLOGY> 2005> 14(3): 229-233
GUAN Ji-fu, GU Liang, HOU Chao-zhen, WU Yun-peng. Linear Quadratic Integral Control for the Active Suspension of Vehicle[J]. JOURNAL OF BEIJING INSTITUTE OF TECHNOLOGY, 2005, 14(3): 229-233.
Citation: GUAN Ji-fu, GU Liang, HOU Chao-zhen, WU Yun-peng. Linear Quadratic Integral Control for the Active Suspension of Vehicle[J].JOURNAL OF BEIJING INSTITUTE OF TECHNOLOGY, 2005, 14(3): 229-233.
shu

Linear Quadratic Integral Control for the Active Suspension of Vehicle

  • 1.

    School of Information Science and Technology, Beijing Institute of Technology, Beijing 100081, China

  • 2.

    School of Mechanical and Vehicular Engineering, Beijing Institute of Technology, Beijing 100081, China

Funds:theMinisterialLevelAdvancedResearchFoundation(20010453)
  • Received Date:2004-01-07
    Abstract
  • The quarter model of an active suspension is established in the form of controllable autoregressive moving average (CARMA) model. An accelerometer can be mounted on the wheel hub for measuring road disturbance; this signal is used to identify the CARMA model parameters by recursive forgetting factors least square method. The linear quadratic integral (LQI) control method for the active suspension is presented. The LQI control algorithm is fit for vehicle suspension control, for the control performance index can comprise multi controlled variables. The simulation results show that the vertical acceleration and suspension travel both are decreased with the LQI control in the low frequency band, and the suspension travel is increased with the LQI control in the middle or high frequency band. The suspension travel is very small in the middle or high frequency band, the suspension bottoming stop will not happen, so the vehicle ride quality can be improved apparently by the LQI control.
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    • References (10)
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