An Optimal Control Method of Facing Indoor Environment of Building

摘要

Using mathematics method setting the optimal PID parameters of the controller of the PID conrol system is a meaningful and difficult question in the practical control engineering. The term e-rs included in the hysteresis τ in the characteristic equation is open by Taylor series. From the start of analysing the stability of the airconditioning control system according to linear system the calculating formulas of the optimal PID parameters will be inferred by the quadratic form performance index J to solve the parameters optimal question of the controller. According to the real measuring system data of two PID control systems of the airconditioning the parameter ranges of ensuring system stability will be calculated out and the PID parameters will be set by listing. The control quality indexes of two control systems, the maximum percent overshoot B and the regulated time ts, will be found by the unit step responsive cure method. The control quality indexes under the same optimal PD parameters and the different integral time set by the different weighted facfor q will be compared and on these grounds the control accuracy and the effect of saving energy will be analysed.