变风量空调的自适应解耦控制研究

变风量空调是一个多输入多输出的相互耦合的系统,由于实际系统受多种因素的影响,系统模型参数也会发生变化。针对系统的耦合性和时变性,提出一种基于在线辨识的自适应解耦控制策略并将其应用在变风量空调系统中。该控制策略采用具有遗忘因子的递推方法和基于零频率模型匹配的联合参数辨识算法,在控制系统闭环运行条件下,对系统的过程参数进行在线辨识,以此模型来设计控制器和解耦器,对相关控制回路进行解耦控制。对实际系统中两个耦合的回路进行仿真分析和实验验证,结果表明该方法有效改善了系统的耦合作用,提高了控制系统的稳定性和鲁棒性。

Research on adaptive decoupling control in variable air volume air conditioning system

The variable air volume air-conditioning is a multiple input multiple output coupling system, and because the actual system is influenced by many factors, the system model parameters are also changed. According to the system of the coupling and changeable, this paper puts forward a kind of online identification based on adaptive decoupling control strategy which is used in the variable air volume air-conditioning system. This control strategy uses a recursive forgetting factor and parameter identification algorithm based on model matching of zero frequency. When system is operating in closed-loop control conditions, process parameters are identified online. Based on the model to design the controller and the decoupling device, and the relative control loop is decoupled. To the actual system, two coupled loop is simulated and experimented. The results show that this method is effective to improve the coupling effect of the system, improve the stability and robustness of the control system.