Hybrid qualitative and quantitative control method
一种定性和定量信息混合控制法(英文)

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.