基于Smith预估控制和组态技术的锅炉内胆温度控制

Water-temperature Inside the Boiler Control Based on Smith Predictive Algorithm and the Configuration

本文针对锅炉内胆的水温控制,设计了以单片机为控制器的控制系统,主要完成了铂电阻温度采集电路、可控硅加热电路以及过零检测等硬件电路的设计,采用了Smith预估控制算法,同时为增加系统受到的负荷干扰的补偿作用和减少对模型的依赖程度,对Smith预估器控制算法在结构上进行了改进。设计了系统的远程组态监控,在组态环境里对系统进行调试。MATLAB仿真和组态调试结果表明:控制性能指标明显优于普通PID控制,同时系统的抗干扰能力有了大幅度的提高,设计的效果较为理想。

This paper designs a MCU control system in connection with water-temperature inside the boiler. The system mainly completes hardware circuits such as the platinum resistance temperature acquisition,SCR heating and zero-crossing detection. The system adopts Smith predictive control algorithm In the same time the Smith predictor control algorithm has been improved in the structure in order to increase the load on the system by the compensation effect and to reduce interference dependence on the model. The system also forms the configuration remote monitoring and operates in configuration environment. MATLAB simulation and configuration debugging results show that： the control performance is better than conventional PID control,while anti-jamming capability has greatly improved,reaches to the design objective.