Feature Modeling And Control

Most methods in the current intelligent control are not based on system's mathematical-model, but they can control complicate system effectively, because they have made system's characteristic variable such as error and error derivative. So the conceptions of "characteristic variable" and "characteristic model" are presented here as a clue where the paper focuses on collecting and summarizing the characteristic variable, to indicate system's state and performance. Physical meaning of the variables is discussed also. The characteristic variable includes: stability-monitoring variable, characteristic variable based on time-domain performances, output waveform variable, parameter variable and circumstance variable. In addition, the paper discusses the control form based on characteristic model. Intelligent PID control and fuzzy control are analyzed in point of characteristic variable. The paper applies the method of characteristic-model-based control to multi- electromotor servo system, builds the characteristic model based on performance targets, error and error derivative, etc. and processes simulated experiment and simulation analysis. Finally the paper describes the prospect and future direction of this research.