Abstract:

A novel control algorithm with fixed pulse thrust, based on true proportional navigation (TPN), is proposed for exoatmospheric intercept. According to the TPN guidance law and pulse thrust characteristics, the principle of control command is presented, the control stability and precision are analyzed. With the help of the TPN guidance law, the algorithm can automatically modulate the turn-on time and duration of the thrust, which could effectively limit the impact of measure noise of the line-of-sight (LOS) angle and rate on the interception miss-distance. At last, the number-theoretic method (NTM) is introduced to acquire the relation between control algorithm and miss-distance, even as it simulates the intercept process with initial state noise. And the reliability of the algorithm is demonstrated with the simulation result.