脉冲调制在小型姿控推力器中的应用仿真

摘要： 针对采用推力器进行姿态控制过程中的姿态稳定度和燃料消耗优化问题，对脉冲调宽调频（PWPF）和伪速率脉冲（PSR）调制器进行详细介绍，分别对采用PWPF调制器和PSR调制器的姿控推力器姿态控制进行仿真分析，总结采用上述两种调制器的优缺点.以采用双时间常数的方法降低燃料消耗，加入一阶惯性滤波的方法降低系统噪声影响从而提高姿态控制稳定度，设计一种改进的脉冲调制器.通过仿真表明采用改进的脉冲调制器相比于采用PWPF调制器更节省燃料，且姿态稳定精度相当，相比于PSR调制器，改进的脉冲调制器显著提高了姿态稳定精度.

Application Simulation of Pulse Modulation in Small Attitude Control Thruster

Abstract：Aming at the problems of attitude stability and fuel consumption optimization in the process of attitude control using thrusters, a detailed introduction is made on pulse width pulse frequency (PWPF) pulse modulator and pseudo rate modulator (PSR).The attitude control laws designed with PWPF and PSR modulators are simulated and analyzed respectively, and then the advantages and disadvantages of the two modulators are summarized. By using double time constant to reduce fuel consumption, adding a first order inertial filter to reduce the influence of noise so as to improve the attitude control stability, an improved pulse modulator is designed. The simulation results show that the proposed modified pulse modulator is fuel economic and with the same attitude accuracy compared to PWPF modulator. Moreover, the modified pulse modulator significantly improves the accuracy of attitude stabilization compared to PSR modulator.