ORBITAL DESIGN OF VERTICAL HITTING MOON PROBE

In this paper, the problem of orbital design of vertical hitting moon probe is discussed. The probe starts from a near-earth circular parking orbit and accelerates in the velocity direction of the parking orbit then enters the landing moon orbit and finally hits the moon with free flight, Firstly,in the constraint conditions of the parking orbit,energy limit,and the landing moon point using theories of two-body and double two-boby, not only the approximate initial values of the orbit are given,but also the characteristics of it are illustrated. Then, based on a dynamic model of general restricted four-boby, three point boundary values are searched and the high accuracy orbit of the probe is gained.