Linear variable parameter μ synthesis robust control of solenoid valve semi-active suspension

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Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (8) : 221-231.

KOU Farong1,LI Shenglin2,YANG Xudong2,XING Longlong2

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Abstract

A linear parameter varying(LPV) μ synthesis robust controller is designed for the nonlinearity, uncertainty problem, and the contradiction between multiple performance objectives in solenoid valve semi-active suspension systems. A nonlinear damping force dynamics model of the solenoid valve was established and performed on a bench test to verify the accuracy of the model. A nonlinear LPV model for a seven-degree-of-freedom suspension system was constructed. An LPV-μ synthesis robust controller based on nonlinear and mixed uncertainties is designed with analysis of suspension parameter uncertainties and system modeling errors and consideration of the effects of sensor measurement noise. Finally, the full vehicle solenoid suspension system simulation and real vehicle test were conducted. Simulation results show that the controller reduces the root mean square value of body vertical acceleration for 46.47%, the pitch angle acceleration for 46.47%, and the roll angle acceleration for 50.68% under random disturbance. It has excellent anti-jamming ability and controllability. The test results show that the root mean square values of the vertical acceleration, pitch angle acceleration, and roll angle acceleration are reduced by 36.6%, 30.14%, and 39.47%, respectively, under the LPV-μ synthesis control. In addition, the dynamic deflection of the suspension is ensured to be less than 0.06 m, which verifies the effectiveness of the control strategy.

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Solenoid semi-active suspension / nonlinearity and uncertainty / linear parameter varying systems / multi-objective control / LPV-μ synthesis

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KOU Farong1,LI Shenglin2,YANG Xudong2,XING Longlong2. Linear variable parameter μ synthesis robust control of solenoid valve semi-active suspension[J]. Journal of Vibration and Shock, 2024, 43(8): 221-231

References

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