基于风机模型不确定性的鲁棒控制

通过对变风量空调系统中的定静压控制、变静压控制和总风量控制方法的分析,结合空调末端的特点,选择定静压控制方法控制风管静压.由于设备老化、非线性和外部因素,风机模型具有不确定性,对静压的稳定控制造成不利影响.对静压控制采用基于线性矩阵不等式的PID控制和预测控制算法,并与普通PID控制作比较.仿真表明,采用这2种算法的定静压控制稳定性好,具有较强的鲁棒性.

Robust Control Based on Fan Model Uncertainty

By analyzing constant static pressure control,variable static pressure control and total air volume control of the supply air fan in a VAV(variable air volume) air conditioning system,and combining with the characteristics of the VAV BOXes,the constant static pressure control method is selected to control the duct static pressure.Due to the equipment aging,nonlinear and external factors,the fan model has uncertainty.It will affect the stability of static control adversely.For static pressure control,the PID control algorithm and predictive control algorithm based on linear matrix inequality (LMI) are used,and compared with normal PID control.The simulation result shows that the two control algorithms in constant static pressure control have good stability and strong robustness.