分析了飞机起落架半主动控制原理,建立了半主动控制起落架力学模型,比较了半主动控制中磁流变和电流变减震器优缺点,采用常规状态反馈控制方法和线性二次型最优控制方法,对起落架系统进行设计,得到了半主动控制器,通过仿真软件分别对半主动状态反馈和最优控制起落架模型进行了数值.结果表明,半主动控制起落架能够有效降低飞机冲击载荷和振动响应,使飞机很快达到稳定,采用线性二次型半主动最优控制方法效果较好.%When designing a landing gear damper, it is well-known that damper characteristics required for good handling are not the same as those required for good ride comfort. Semi-active control landing gear damper, as their name implies, fill the gap between purely passive damper and fully active control Langing gear-control systems and offer the reliability of passive systems, yet maintain the versatility and adaptability of fully active devices. For this reason, the basic theoretical concepts are briefly reviewed for semi-active landing gear damper design and implementation, mathematical model of semi-active control landing gear is established . A state feedback semi-active controller is designed. At last, the passive control landing gear module and semi-active control landing gear module are simulated. Simulation result shows that the vibration of passive control landing gear is vehement, and the system stable time is long. But in the simi-active control landing gear system the impact load and vibraton can be reduced, the aircraft can reach the stability state in a few seconds. Using linear quadratic optimal control effect is good.
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