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Generalized guidance law for collision courses

1993; American Institute of Aeronautics and Astronautics; Volume: 16; Issue: 3 Linguagem: Inglês

10.2514/3.21039

1533-3884

Yoriaki Baba, Makoto Yamaguchi, R. M. Howe,

Electromagnetic Launch and Propulsion Technology

A new generalized guidance law for collision courses is presented.When the missile and target axial accelerations or decelerations are constant, there exists a rectilinear collision course.The guidance law presented, which is called the true guidance law, gives theoretical lateral acceleration commands to guide the missile on a collision course.However, since it is very difficult to realize the true guidance law on most existing tactical missiles, this paper shows a method for simply implementing the guidance law, which is called the simplified guidance law.The small perturbation equation of the true guidance law shows that the definition of an effective navigation constant is the same expression as that in the case of conventional proportional navigation.The performance of the two guidance laws presented is compared with that of proportional navigation using simulation studies of a simple model of a short range air-to-air missile.The simulation results show that the guidance laws presented can intercept the target using far smaller lateral acceleration commands than prepared for proportional navigation.The inner launch envelope shows that the guidance laws presented provide an overall performance improvement over proportional navigation.