一种攻击大机动目标的PID型比例导引律

传统的比例导引（ＰＮ）具有两个缺点，一是攻击大机动目标的控制精度差，二是指令加速度过载大。为此，本文提出了一种攻击大机动目标的扩展ＰＩＤ比例导引（ＰＩＤ－ＰＮ）制导规律。

A New PIDPN Guidance Law for Intercepting Highly Maneuverable Targets

If we employ PN(proportional navigation) guidance law, we are unable to intercept highly maneuverable targets because: (1) control precision is not good enough, (2) overload demand of acceleration command is not low enough. Therefore we present a PIDPN(proportionalintegraldifferential proportional navigation) law, which is n c=kV c{ (1/2)k 1t go (q-q 0)/t f]}. n c=kV c is PN law. (1/2)kk 1V ct go is the differential term of PIDPN law, which makes it possible to improve the high maneuverability of missile. (1/2) kk 1V c(q-q 0)/t f is the integral term of PIDPN law. This integral term means physically a pursuit signal, which makes it possible to correct initial deviation of line of sight in realtime. In a simulation example, a specific type of AAM (airtoair missile) is used for intercepting highly maneuverable targets. Simulation results in Figs.2 and 3 indicate that, for homing against highly maneuverable targets, PIDPN law is better than PN law in three respects: (1) control precision is higher, (2) overload demand of acceleration command is lower, (3) interception time is shorter.