【摘要】 在导出采用 Ｓ Ａ Ｓ的桨距控制的直升机“地面共振”空间模型的状态方程和输出方程的基础上，研究抑制直升机“地面共振”的控制律综合设计方法。鉴于工程实用性，宜采用可测得的输出作反馈控制；由于直升机旋翼工作转速范围宽，反馈控制应保证旋翼从起动到最大工作转速范围内闭环系统全速稳定。因此，提出并研究满足上述要求的基于输出反馈的次最优控制法与基于观测器的输出反馈最优控制法。仿真计算表明了这些方法对抑制直升机“地面共振”的有效性。更多还原

【Abstract】 s Based on the deduction of the state and output equations for the space model of “ground resonance” of helicopter using SAS pitch control the control law design method for suppressing “ground resonance” of helicopter is studied. It is preferable to use feedback control with measurable states for practical applications. Because of wide range of rotor operated speed, the feedback control should guarantee the system stability at the whole speed range of the rotor from zero to its maximum operated speed. Therefore the control law design methods based on suboptimal control method and optimal observer control method with measurable states are presented and studied. Simulation calculations show the effectiveness of suppressing “ground resonance” of helicopter by the methods mentioned.更多还原