Optimal semi-active control for nonlinear random vibration of armored vehicle seat

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (23) : 220-224.

HU Lingjun1, LIU Bin2, HUAN Ronghua1, ZHU Weiqiu1, LIU Yan3

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Abstract

When an armored vehicle drives on rough roads, its inside seat has violent vibration under random loads to significantly affect the comfort of crew members.Thus, it is of great importance to develop effective strategies for controlling seat random vibration.Here, an optimal semi-active control for nonlinear random vibration of armored vehicle seat was proposed.Firstly, the seat system of armored vehicle was taken as the study object, and its nonlinear stochastic dynamic model was established.Then, the stochastic average method and the random dynamic programming principle were applied to deduce the concrete form of the optimal semi-active control force.The statistics of the seat system steady-state response including probability density and mean square value, etc.under controlled and uncontrolled states were obtained.Finally, the correctness of the proposed method was verified with numerical simulation.Results showed that under controlled state, the control effect of the proposed control strategy on the mean square value of the seat system steady-state response reaches 85.0%, it has a good vibration reduction effect.

Key words

random vibration / nonlinear system / magneto-rheological (MR) damper / optimal control

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HU Lingjun1, LIU Bin2, HUAN Ronghua1, ZHU Weiqiu1, LIU Yan3. Optimal semi-active control for nonlinear random vibration of armored vehicle seat[J]. Journal of Vibration and Shock, 2020, 39(23): 220-224

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