一种定性和定量信息混合控制法(英文)

Hybrid qualitative and quantitative control method

中文关键词  键图  定性控制  定量控制

英文关键词  bond graph  qualitative control  quantitative control

中文摘要

      基于精确数学模型的定量控制,虽精度高,但控制质量受限于对象参数的变化;定性控制具有较强的鲁棒性,但精确性稍差.结合两者优点,本文提出了一种无需对象精确数学模型的定性、定量信息混合控制新算法.该算法首先建立无因果划的键图模型,使用改进的键图理论,分析并给出键图模型中知识的定性表达方程,并对该定性表达方程进行适当的化简导出控制方程.对比PID控制的仿真结果证实:该算法具有较好的鲁棒性和动态性能,尤其在对象参数时变和含有非线性环节时.

英文摘要

      Quantitative control with accurate mathematical model has high precision and its performance is restricted by parameters varying while qualitative control often has both strong robustness and low precision. Combining the merits of both, an algorithm of hybrid qualitative and quantitative control (HQQC) was proposed without accurate math model. Bond graph model without causality stroke was firstly built in the algorithm, the qualitative representations were analyzed and illustrated with improved bond graph theory. Then control equation of HQQC was deduced from simplifying qualitative representations. Comparing with PID, simulation results demonstrate the robustness and transient performance of the algorithm, especially when the plant is time-vary and nonlinear.