跟踪微分器在半捷联导引头中的应用

Application of tracking differentiator in semi-strapdown seeker

对半捷联稳定方式导引头进行了研究,导出了半捷联导引头稳定控制原理,并进一步建立了完整的半捷联导引头稳定回路框图。介绍了跟踪微分器的工作原理,并对其进行了数值仿真,仿真结果显示了跟踪微分器良好的跟踪性能和滤波性能。在半捷联稳定中,为了减小由框架角位置微分求取框架角速度引入的较大的测速噪声,提出了采用跟踪微分器的方法。数值仿真和半实物实验结果说明了跟踪微分器能有效地从角位置信号中微分求得角速度信号,系统稳定精度提高了80%,证明了跟踪微分器在半捷联稳定中应用的可行性和有效性。

The research of semi-strapdown seeker was carried out, the control principle of semi-strapdown seeker was showed and the integrated stabilization loop of semi-strapdown seeker was proposed. The theory of tracking differentiator was introduced and the simulation was carried out. The simulation study result shows excellent track and filter capability of tracking differentiator. In order to cut down the noise of velocity measurement in semi-strapdown seeker, the tracking differentiator was used. The simulation and hardware in loop result show that the velocity of platform frame is well estimated by tracking differentiator, the stabilization precision of semi-strapdown seeker improves 80%, which testifies the feasibility and validity of the tracking differentiator in semi-strapdown seeker.