基于输出反馈H_∞控制的跟瞄平台稳定控制研究

Research on Stabilization Control of Tracking and Pointing Platform Based on Output-Feedback H_∞ Scheme

不考虑光电跟瞄平台环架之间的耦合,建立了外界干扰作用下,环架运动的状态空间模型;基于线性矩阵不等式(LMI)对光电跟瞄平台的方位、俯仰及横滚环,分别设计了输出反馈H_∞稳定控制器。仿真结果表明,该控制器能够实现对光电跟瞄平台的稳定控制,且在模型参数存在摄动和含有多种干扰的情况下,几乎不影响其控制效果,具有良好的鲁棒性及抗干扰能力,满足光电跟瞄平台稳定控制需要。

By ignoring the coupling among the three degrees of freedom photoelectric tracking and pointing platform,the motion state space model of the frame under the external disturbance is firstly established.Then,based on linear matrix inequality（ LMI）,the output-feedback H∞ stabilization controller is designed for the azimuth,pitch and roll loops of the photoelectric tracking and pointing platform. The simulation results show that the stability control of the photoelectric tracking and pointing platform can be achieved by the controller. In the case of model parameter perturbation and multiple disturbances,the control effect is almost unaffected. The H∞ controller has good robustness and anti-interference ability,which meets the needs of the stability control of the photoelectric tracking and pointing platform.