基于LQG的混合电磁悬架阻尼-刚度设计及试验研究

Design and tests for damping-stiffness of a hybrid electromagnetic suspension based on LQG

提出了一种具有三种模式的混合电磁悬架,三种模式分别侧重于悬架的平顺性、轮胎接地性和综合性能,协调了悬架平顺性与轮胎接地性之间的矛盾。建立了混合电磁悬架的动力学模型,确定了各个模式下LQG控制策略的加权系数。在不同的模式下分析了刚度、阻尼对于悬架动力学性能以及悬架能耗特性的影响,确定了不同模式下刚度和阻尼的取值,并进行了仿真分析。结果表明:混合电磁悬架相比于传统被动悬架能够有效改善悬架动力学性能,且相比于主动悬架能明显减少能量消耗。最后进行了试验研究,试验结果与仿真结果基本一致,验证了仿真结果的正确性,表明混合电磁悬架能够减少悬架主动控制时的能量消耗。

A hybrid electromagnetic suspension with three modes was proposed here. Three modes focused on ride comfort,tire grounding ability and comprehensive performance of a suspension,respectively. The contradiction between ride comfort and tire grounding ability was coordinated. The dynamic model of the hybrid electromagnetic suspension was established. Weight coefficients of LQG control strategy under the three modes were determined. The effects of the suspension's stiffness and damping on its dynamic performance and energy consumption characteristic were analyzed under different modes,the suspension's stiffness and damping values under different modes were determined. Simulation analysis was performed. The results showed that compared with a traditional passive suspension,the hybrid electromagnetic suspension can improve a suspension's dynamic performance effectively; it can significantly reduce a suspension's energy consumption compared with an active suspension. Finally,the tests were conducted. It was shown that the test results agree well with those of simulation,the correctness of the simulation results is verified.