基于反步法的空气处理机组温湿度跟踪控制

Tracking control of temperature and humidity for air handling units based on backstepping control

针对空气处理机组室内湿负荷和进回水温差不确定的情况,提出一种带有多参数的反步控制器,可以实现温度和湿度的跟踪控制。为了设计方便,先将空气处理机组的动态模型转换为状态空间表达形式,通过引入带增益的状态变换,将原系统的跟踪控制问题转换为变换后所得新系统的稳定控制问题;利用反步法逐步设计了控制器,并通过选择合适的设计参数,实现了温度和湿度的跟踪控制目标;分析了闭环系统的稳定性并给出了证明过程。结果表明:仿真实验验证了所研控制器的有效性,通过与PID控制器对比可知,所设计控制器的跟踪效果更好。

A backstepping controller with multiple design parameters is proposed for temperature and humidity tracking control of AHUs under uncertain strength of the humidity source and temperature gradient in cooling unit.To simplify the design,the dynamic model of the AHUs is first transformed into state space form.By introducing a state transformation with a gain,the tracking control problem of the original system is converted to the stability control of the transformed new system.The backstepping controller is designed step by step,and by selecting appropriate design parameters,the tracking control objectives for both temperature and humidity are achieved.The stability of the closed-loop system is thoroughly analyzed,accompanied by a comprehensive proof process.The results show the simulation outcomes validate the efficacy of the proposed controller,and a comparative analysis with a PID controller underscores its superior tracking capabilities.