论文部分内容阅读
以考虑侧向柔性和陀螺特性的摆振数学模型为例,研究了起落架摆振结构因素的影响。采用代数稳定性判据、状态空间法等方法进行了稳定性分析,得到了有关侧向刚度、偏摆刚度和稳定距等结构因素的稳定性区域,以及幅相特性曲线。而且对于起落架摆振优化,提出了基于遗传算法的PID主动控制策略。仿真结果表明,方法有效抑制了各种结构参数组合下摆振的发生,使得受控系统具有一定的强鲁棒性。
Taking the mathematical model of shimmy with lateral flexibility and gyro characteristics as an example, the influence of the structure of the undercarriage on the structure of the undercarriage is studied. The stability analysis based on algebraic stability criterion and state-space method is used to obtain the stability of the structural factors such as lateral stiffness, yaw stiffness and stability distance, as well as the amplitude-phase characteristic curve. And for the optimization of the landing gear shimmy, a PID active control strategy based on genetic algorithm is proposed. The simulation results show that the proposed method can effectively suppress the occurrence of shimmy under various structural parameters and make the controlled system robust.