Study Of The Control Of Semi-active Variable Damping System In Impact Load

This subject is concerned chiefly within the Control of active variable dampingsystem In impact load, with the emphasis on the dynamic characteristic of themagnetorheological fluid damper in impact load, the control strategy of themagnetorheological system, and the design of the hardware apply desk ofmagnetorheological intelligent control system.The paper amends the former dynamical model of the magnetorheological fluid indamp pass in impact load which using regular laminar flow theory. And according thedifference of the flow state, single-DOF non-regular hydrokinetic model of themagnetorheological fluid in damp pass in impact load is build in the state of laminar flowand onflow.After analyzing the structure of the long journey anti-impact magnetorheologicalfluid damper, the dynamic model of the magnetorheological fluid damper in impact loadis build which is composed of friction damp force, coulomb damper force, inertia damperforce and throttle damper force of the annulus damp pass ,the damper force of the leadpart and the structure accessional damper force.The paper transforms the problem of the impact-response bourn restriction into theproblem of output target tracing and advances output target tracing model with disturbregulator. Considering the kinetic properties (strong nonlinear vibration, wide frequencyrange and high peak-value of the acceleration) in instantaneous station of impact-loadvibration, the paper designs output target tracer using fuzz sliding control strategy.The paper analyses the nonlinearity time lag of the system, and uses Smith estimatemethod compensate the output time lag of the system. And to eliminate the influence ofthe model error and the output distortion caused by the changing of the system static plus,the paper designs the self-adapt Smith estimator.The impact experiments testify that the dynamical model of the magnetorheologicalfluid damper in impact load, the self-adapt Smith estimator and the output target tracerusing fuzz sliding control strategy are effective and accurate.At last, the paper discusses the design of the hardware apply desk ofmagnetorheological intelligent control system, ameliorates the current driver and designsthe prototype of the active variable damping control system based on TMS320F2812. ##无英文摘要内容...