Abstract
A guided vehicle which utilizes the principle of proportional navigation has a target tracker to measure the angular rate of the line-of-sight. This tracker consists of 2-axes gimbals mechanisms to prevent the “tracker-to-vehicle” coupling. But no gimbals mechanisms have perfect performance, and as well known in the practical guidance system designer, the “tracker-to-vehicle” coupling suppresses the guidance system performance.
This paper presents a definition and a mathematical model of the “tracker-to-vehicle” coupling. Then, by using the definition and the model, the constraint conditions of the “tracker-to-vehicle” coupling for a target tracker are shown by two methods. The first is by the stability analyses of the parasitic loop which are generated by the existence of the “tracker-to-vehicle” coupling. The second is by the simulation analysis of the guidance system including “tracker-to-vehicle” coupling.
