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首页> 外文会议>MV2 Convention on Active Control in Mechanical Engineering, Oct 22-23, 1997, Lyon, France >Stability and nonlinearity of a novel active suspension system
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Stability and nonlinearity of a novel active suspension system

机译：新型主动悬架系统的稳定性和非线性

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This paper outlines the operation of a zero-rate suspension and identifies the source of nonlinearity. Both experimental and simulation results are presented to show the effect of the nonlinearity on the control of the system. It is suggested that the nonlinearity introduces unstable regions in the system's state space, which results in locally stable operating points being unreachable. This causes system instability, when used with PD or PID controllers, if the derivative term falls outside a band of values, if the proportional gain is over large, or if the mass of the vehicle is too low. In the nonlinear system, the actuator bandwidth plays a significant role in the control performance. It leads to considerable reduction of the stable region, which means the actuator bandwidth is the another limiting factor in the control parameters. It has been found experimentally and numerically that a multi-input and multi-output PID controller with sky hook damping can improve the stability which is degraded by the nonlinearity and other factors, and provide quite satisfactory control performance and ride comfort.
机译：本文概述了零速率悬架的操作并确定了非线性的来源。给出了实验和仿真结果，以显示非线性对系统控制的影响。建议非线性会在系统的状态空间中引入不稳定区域，从而导致无法达到局部稳定的工作点。当与PD或PID控制器一起使用时，如果微分项落在值的范围之外，比例增益过大或车辆的质量过低，则会导致系统不稳定。在非线性系统中，执行器带宽在控制性能中起着重要作用。这导致稳定区域的显着减小，这意味着执行器带宽是控制参数中的另一个限制因素。从实验和数值上发现，具有天钩阻尼的多输入多输出PID控制器可以提高稳定性，该稳定性会由于非线性和其他因素而降低，并提供令人满意的控制性能和乘坐舒适性。

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