导弹控制系统稳定性研究

On the Stability of the Missile Control System

导弹控制系统是一个非线性的时变系统;传统的控制器设计是将总的飞行时间分为几段,然后对于不同的时间段设计不同的控制器;由于在同一时间段内系统参数不断变化,而控制器参数不变,这样就造成在时间段内控制系统性能变差;为了解决在每一个时间段内系统性能变差问题和在时间段之间切换控制器时系统性能的突变及发动机工作的不稳定的问题,提出了采用对各个控制器相对时间进行单点模糊化、乘积推理和平均加权反模糊化的方法,实现在整个时间段控制系统的平稳工作。克服动态性能的跳变和发动机工作不稳定的问题,提高了导弹的可靠性。仿真实验证明了此方法的有效性。

The missile control system is a nonlinear time-varying system. The triditional design of controller is to design different controllers for different time sections obtained by dividing the whole flight time. For the parameters of the system varies all the time and the parameters of the controller in a time section are constant, the performance of the control system is deteriorating in the time section. To solve the problems of the system performance deterioration in each time section,and sharp changes of the system performance and unstable engine running during the controllers exchange between time sections, using singleton fuzzifier, product inference and average defuzzifer to the controllers in time domain, the stable working of the control system in all time sections is realized. The sharp change of the dynamic performance and the unstable working of the engines because of changing controllers are overcome and the raliability is enhanced. The simulation shows the effectiveness of the approach.