基于概率的运载火箭控制系统设计方法研究

针对传统的控制系统极限偏差设计方法导致运载火箭余量大、总体性能下降的问题,综述了基于概率的控制系统设计方法的国内外研究现状,论述了运载火箭控制系统概率设计的基本思想及设计流程,基于概率密度函数建模理论,建立了通过实际控制指令来控制概率密度函数拟合权值的状态空间,并基于最小二乘方法对状态空间中的参数进行了辨识,进而建立了密度函数成型控制模型,提出了基于最优控制理论的运载火箭控制器设计方法,最后通过仿真验证了理论方法的有效性,为我国运载火箭控制系统的精细化设计提供了理论依据。

Control System Design Method of Launch Vehicle Based on Probability

The Limit deviation design method leads to the low performance of launch vehicle. The control system design method based on probability is reviewed. The basic idea and the design procedure of probability control for launch vehicle is discussed. The state space is established in which the probability density function fitting weights is controlled by actual control instruction, and the parameters of the state space is identified with the least squares method. Further more, the density function forming control model is established, and the design method of probability controller is studied based on optimum control. At last, the validity of the theoretical method is verified by simulation, which provides a theoretical basis for the fine design of the launch vehicle control system.