面向任务的电推进航天器性能优化与控制

针对电推进(EP)系统的性能与任务耦合优化及控制问题，提出一种基于电推进特征参数模型的耦合优化方法。以入轨有效载荷质量转移率最优为目标，推导出化学-电推进组合任务与多模态全电推进任务的完备形式的拓展火箭方程与最优比冲(Isp)表达式，得到多模态连续电推进最优比冲的计算方法，并得到相关参数对最优比冲的影响规律。结果表明,提出的耦合优化方法与最优比冲公式对求解多模态电推进任务的最优比冲和研究电推进航天器耦合优化控制问题具有指导意义和通用性。

Performance Optimization and Control for Mission Oriented Electric Propulsion Spacecraft

For coupling optimization and control of performance and mission of electric propulsion (EP), a coupling optimization method is proposed based on characteristic parameter model of EP in this paper. With the goal of maximizing the transfer rate of payload mass, the generalized rocket equation and optimal specific impulse (Isp) expressions for CP-EP combined propulsion and multimode all EP missions are deduced. Then a computing method of optimal Isp for multimode continuous EP is proposed. The effects of relevant parameters on optimal Isp are obtained based on some assumptions. The results indicate that the coupling optimization method and the formula for optimal Isp will provide theoretical guidance and generality for studying optimal Isp of multimode EP missions and coupling optimal control of EP spacecraft.