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为验证拦阻索中应力的传播对拦阻过程的影响,研究了计及弯折波的舰载机拦阻过程的比例-积分-微分(PID)控制问题。先以液压阻尼力作为拦阻过程的控制输入建立了无弯折波的理想拦阻过程动力学模型,再依据拦阻过程中需要保持拦阻钩载为常值的要求,借助最优控制方法获得了一组理想轨迹。然后详细分析了拦阻索中弯折波在甲板滑轮与钩-索啮合点间的传播特征,获得了离散的弯折波模型,并将之应用于拦阻过程的PID跟踪控制中。结果表明,弯折波的计入,会使拦阻钩载在拦阻初期出现波动效应,这一现象与美国军用标准MIL-STD-2066中实验得到的钩载随行程变化规律一致。
In order to verify the effect of stress propagation on the blocking process, the Proportional-Integral-Derivative (PID) control problem of barricade jamming considering bending wave was studied. Firstly, the hydraulic damping force is used as the control input of the blocking process to establish the ideal damping process dynamic model without bending wave. Based on the requirement that the holding resistance should be kept as a constant value during the blocking process, a set of optimal control methods Ideal trajectory. Then the propagation characteristics of flexural wave in the cable between deck pulley and hook-cable meshing point are analyzed in detail. The discrete bending wave model is obtained and applied to the PID tracking control of blocking process. The results show that the bending waves are included in the arresting barricades in the early stage of barrage. The phenomenon is consistent with the change of the barometric load with the US Military Standard MIL-STD-2066.