运载火箭并联双机姿控配平策略研究

运载火箭并联双机是一种常见的发动机推力矢量控制(Thrust Vector Control,TVC)方案，发动机与伺服机构可组合出不同的控制布局。针对液体运载火箭典型的4种并联双机摆发动机控制布局，开展了故障动力学建模仿真研究，基于运载火箭比例微分(Proportional Differential,PD)姿控方法，比对分析了不同故障模式的姿控配平结果，优选了并联双机摆发动机控制布局，最后应用控制重分配技术验证了故障下放宽滚动通道性能策略的有效性，结果表明不同的推力矢量布局故障适应能力不同，姿态重构技术在发动机推力较大故障下仍可保证运载火箭良好的姿控性能与稳定能力。

Attitude Control Trim Strategy Research of Parallel-Connected Dual Engines for Launch Vehicle

The parallel-connected dual engines (PCDE) of launch vehicle is a common thrust vector control (TVC) scheme. The engine and servo can be combined with different control layouts. In this paper, four typical PCDE control layouts for liquid Launch vehicle are presented. The fault dynamic modeling and simulation research is carried out based on the proportional differential (PD) control method. The attitude control trim results are compared under different fault modes, so as to recommend the preferred control layout. Finally, the control re-allocation technology is used to verify the effectiveness of the strategy of releasing the rolling channel performance under thrust-fault. Results show that the typical PCDE control layouts possess different fault-tolerant ability. The attitude control reconfiguration technology guarantees the good performance and stability under large thrust-fault for launch vehicle.