The Study Of Fuzzy Adaptive Sliding-Mode Guidance Law

As the application of the high-tech in military , precision terminal guidance technology can directly influence the accuracy of space interception, Classical guidance law can not meet the increasingly complex interception conditions, in particular object maneuver to avoid, and the modern guidance law is too complex to achieve. therefore, It is very urgent to seek a new, high-precision guidance law.This paper deals with an adaptive fuzzy sliding guidance law based on adaptive fuzzy control and variable structure control (VSC) method. It has the characteristics as follows:1. The design of adaptive fuzzy controller, instead of the proportional guidance projects of general guidance law, makes the guidance law robust to the parameter perturbations.2. Add SMVSC to the design of guidance law, motorized target mobile as interference. VSC plays a major role to the target mobile, and is robust to the interference and the parameter perturbations.3. VSC can be easily quivered on the sliding surface, but the adaptive fuzzy controller combined to eliminate the quiver.4. Fuzzy adaptive guidance law is relatively easy to achieve, only needs the line-of-sight rate information of seeker in the terminal guidanceIn this paper, the adaptive fuzzy sliding guidance law is simulated, and compared with the simulation results of the adaptive sliding guidance law. The results show that the fuzzy adaptive sliding guidance law is robust, and good at dealing with motor characteristics of the target, also can overcome the quiver of VSC.Summing up, the study results for the space interceptor terminal guidance has a certain value.