新一代运载火箭适应发动机停摆故障控制策略研究

Research on Control Strategy of New Generation Launch Vehicles Adaption to Engine Fault

我国新一代运载火箭采用了助推发动机与芯级发动机联合摇摆控制模式,但随着参与控制发动机数量的增加也带来了控制系统可靠性降低的风险。本文针对火箭飞行过程中发生的单台发动机停摆故障,从控制力补偿原理进行分析,提出了控制力补偿策略,并进一步对发动机停摆可适应的能力范围进行了研究,最后通过数学仿真得到验证。应用该控制策略可以实现新一代运载火箭发动机的故障吸收,提高系统的可靠性。

The joint swing control technology of the booster engine and the core engine is employed in the new generation launch vehicles. But with the increasing number of control engine, the risk of reducing the reliability of the control system is also brought. According to the principle of control force compensation, in this paper, a single engine failure occurred during flight is studied and the control strategy is proposed. And further the ability rage of engine fault can be studied. Finally, the control strategy is verified by mathemati- cal simulation. Applicaiton of this control strategy can realize the fault absorption of the engine and improve the reliability of the control system.