Minimum Vibration Maneuvers Using Input Shaping and Pulse-Width, Pulse-FrequencyModulated Thruster Control

摘要

This thesis presents the first study of Pulse Width, Pulse Frequency (PWPF)modulated thruster control using the method of command input shaping. In this thesis, a new approach integrating command input shaping with PWPF-modulated thruster control is developed to minimize residual vibration in maneuvers and to reduce propel consumption. To realize this approach, an in-depth analysis of the PWPF modulator is first conducted to recommend parameter settings. Next, command input shapers are designed and integrated with PWPF modulator. Simulation verifies the efficacy of this technique in reducing modal vibration. Lastly, robustness analyses are performed and demonstrate the method's insensitivity to frequency damping uncertainty.