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针对空间轨道转移任务,研究了轨道转移修正过程中状态误差和能量优化控制问题。首先分析了轨道转移过程中各种摄动和测量误差等影响因素,通过对飞行中位置、速度的实际状态和目标轨迹状态比较,建立了控制系统方程。然后基于动态规划原理,提出了一种固定时间间隔的线性二次型离散脉冲优化控制策略。以固定的间隔时间计算控制量,使飞行器的位置和速度逼近目标状态,达到优化能量和位置精度的控制。最后对已知空间两点位置及固定转移时间的飞行任务进行仿真,仿真结果验证了控制方法的有效性。
In the space orbit transfer task, the state error and energy optimization control problems in orbit transfer correction are studied. Firstly, the influencing factors such as various perturbations and measurement errors during the course of orbit transfer are analyzed. The control system equations are established by comparing the actual state of the position and velocity in flight with the state of the target trajectory. Then, based on the principle of dynamic programming, a linear quadratic discrete impulse optimization control strategy with fixed time interval is proposed. Calculating the control volume at fixed intervals allows the position and velocity of the aircraft to approach the target state for control of optimizing energy and position accuracy. Finally, the flight mission of two positions in known space and fixed transfer time is simulated. The simulation results verify the effectiveness of the control method.