Abstract:

   This paper studies the impulsive station keeping strategy for libration point missions. First, the dynamic model is given and the nominal orbit is calculated. Then, the impulsive station keeping strategy is analyzed and the standard impulse for station keeping is discussed. Finally, statistical results are obtained by Monte Carlo simulation, in which the effects of injection errors, the navigation errors and the maneuver errors are taken into consideration. Under the conditions that the minimal maneuver interval is 30 days and the minimal maneuver velocity is 0.02m/s, it is obtained that to keep the station for four years, the consumed maneuver velocity increment is 0.44m/s in average and the average maneuver interval is 71.5 days. Higher maneuver velocity increment is required when standard impulse is introduced and the increment of the consumed maneuver velocity increases with the amplitude of the standard impulse and the minimal maneuver interval.

Key words: control and navigation technology of aerocraft, station keeping, impulsive control, monte Carlo simulation, threebody problem