基于变结构比例导引律的机动目标拦截技术+MATLAB仿真
毕业论文关键词 导引律 变结构控制 智能控制 MATLAB仿真
Title Technology for Intercepting Maneuvering Targets based on Variable Structure Guidance Law
Abstract The targets for guided munition in the contemporary wars has become increasingly complex，and the targets become more and more perse. The targets become more and more maneuvering. Such changes put forward higher requirements for the performance of the guided munition. This article has been studied new guidance laws with superior performance and suitability. Proportional navigation need less information. It has a brief control and navigation system. It can be easily realized in engineering. Sliding-Mode variable structure guidance law has good robustness for uncertainty of parameters and external disturbance. This paper analyzed the performance and accuracy of traditional guidance laws, applied new control technology on Guidance Law, studied the principle of guidance law for hitting maneuvering targets, and then designed guidance laws based on the new control technologies. This paper has a brief introduction for Variable Structure Theory. First, according to the characteristics of the application of the modern interceptor missiles on intercepting maneuvering targets, and variable structure control theory, designed the sliding mode variable structure guidance law. And then it smoothed the guidance law with switch parts. Simulated sliding mode variable structure guidance law and proportional navigation guidance law. Simulation results showed that performances of the sliding mode variable structure guidance law for intercepting large maneuvering targets are good. Its adaptiveness is good，and its robustness is good. However, sliding mode variable structure guidance law in some cases will cause a more serious jitter of line of sight angular rate, which is detrimental to the guidance performance. In order to obtain guidance laws with better performances. This paper studied the adaptive intelligent sliding mode guidance law which based on intelligent control technology and variable structure control technology. For intelligent control, accelerations of the targets are estimated by state reconstruction method. Finally, simulated with the adaptive intelligent sliding mode guidance law, the sliding mode variable structure guidance law and proportional navigation method. Simulation results showed that when use Adaptive Intelligent Guidance Law to intercept a variety of maneuvering targets, the intercept ballistic is the straight, needed acceleration is small, and its performance is good.
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