解析解耦设计在变风量空调系统中的应用

Application of Analytical Decoupled Design for Variable-Air-Volume Air-conditioning System

研究空调优化控制问题,变风量空调(VAV)具有多变量、强耦合和非线性系统。变量之间的耦合会直接影响空调系统的性能指标和稳定性。针对变风量空调系统进行建模,模型为三输入三输出的传递函数矩阵。在内模控制系统结构基础上,运用解耦控制的解析设计方法来设计解耦控制器。解耦设计方法可以达到标称系统变量间完全解耦,并且参数可以在线调整,使输出能够紧密跟随系统的动态变化。仿真结果表明,解耦控制器的设计提高了性能,应用效果较好。

Variable-Air-Volume （VAV） air-conditioning system has the feature of multi-variable, intense cou- pling and nonlinear. The coupling may directly affect the performance and the stability of VAV system. In this paper, a theoretical model of VAV air-conditioning system is established, which is the three input-output transfer function matrix. Based on the internal model, the analytical design of decoupling control method is used to design the decou- piing controller. Its advantage is that absolute decoupling can be implemented, and moreover, the controller parame- ters can be tuned on-line in a monotonous manner to cope with the plant unmodeUed dynamics. The simulation curves of the decoupling control system show the availability of the method.