一种变系数比例导引规律

针对经典比例导引规律和最优导引规律的缺点，由蝇追逐行为得到启发，提出了变系数比例导引规律，并以某型空空导弹的大回路模型为对象，进行了大量数字仿真。仿真结果表明，文中所提出的新导引规律脱靶量小、易于工程实现。

A New and Better Proportional Navigation Law with One Variable Coefficient

In design of every new type of missile, navigation laws always require serious consideration. Although modern navigation laws, based on the modern control theory, are of good accuracy for guided missiles, their complexity makes realization difficult in practice. Classical proportional navigation laws are easy to be realized, but their guidance accuracy is bad for a target maneuverable over a large range. In order to overcome the shortcomings and retain the advantages of classical proportional navigation laws, we, inspired by achievements of bionics research on the pursuit of male flies for female flies, propose a new proportional navigation law with one variable coefficient in this paper. The coefficient in the law is a variable related to the timetogo. For realization of the guidance law, a new method to estimate the timetogo is given. The simulation results on an infrared image guided airtoair homing missile show that the new type of proportional navigation law has much better performance than conventional navigation laws in reducing the miss distance. Even for a target maneuverable over a large range, the miss distance still remains small, and its realization is simple.