一种改进的扩展比例导引律及其仿真

An Improved Expansion Proportional Guidance Law and Simulation Study

针对比例导引制导导弹攻击机动目标阶段,系统状态可观测性弱的问题,在扩展比例导引律的基础上提出了一种改进方法。该方法形式简单,易于工程实现。建立了弹目相对运动模型,基于被动跟踪的可观测性理论建立了可观测性指标,并对改进的比例导引的可观测性进行理论分析,采用MATLAB语言,对改进比例导引法的理想弹道进行了仿真,绘制出随导弹与目标参数变化的三维图像,对理想弹道的特性进行了分析。仿真结果表明,这种改进的比例导引是合理有效的,与扩展比例导引相比,该制导律能够明显提高制导过程中的可观测性,增强弹上跟踪滤波器的效果。

This paper shows stage for proportional navigation guided missiles against maneuvering targets,the state of the system can be observed weak extended proportional navigation guidance law based on a improved method. The form of the method is simple and easy to implement. The releative motion of the missile and target model are established. The observability indicators is also established, and improved observability proportional navigation theoretical is analyzed. Using MATLAB language, the improved ideal trajectory proportional navigation law of is simulated,changes in the three-dimensional image with the missile and target parameters is mapped out,and the characteristics of the ideal trajectory is analyzed. Simulation results show that this improvement proportional navigation is reasonable and effective.