基于知识的不确定性复杂系统的稳定性分析

Analysis on Stability for Uncertainty Complex Control System Based on Knowledge

稳定性概念是含糊的 ,但稳定性又是动态系统的基本特性 ,是各种控制系统正常运行的前提条件。对难于或不能建立数学模型的不确定性复杂控制系统要分析其稳定性至今还是挑战性的难题 ,很难借鉴稳定性数学判据直接判断一个系统运行是否稳定。采用将绝对稳定性和启发式搜索自锁定概念相结合的分析方法 ,可以在更大范围内对基于知识控制模型的不确定性控制系统通过调节自镇定回路的参数来分析系统的稳定性 ,工程实践表明 ,对不确定性复杂系统的稳定性分析方法在实际物理控制系统中是有效和可用的。

Concept of stability is vague, but it is basic characteristic of dynamic system, and precondition that make all kinds of control system run normally. Today it is still a challenge to analyze stability for uncertainty complex control system, whose mathematic modeling is impossible or very difficult, so it is very hard to judge whether a system running is stable or not by mathematic stability criterion. A kind of analyzing method is presented, which combine absolute stability with self-locked concept of heuristic search, it may analyze system stability in more range through adjusting self-collected loop parameters for uncertain control system based on knowledge control model. It is shown that stability analyzing method is effective and suitable for practical physical system in the engineering project.