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为提高CFB锅炉燃烧系统的自动控制品质,分析了系统主蒸汽压力和床温对象在调节过程中的相互作用,提出解耦的系统控制结构.通过选取上述强耦合对象,以一次风量和给煤量作为调节量,采用补偿的多变量内模解耦控制策略实现了该两输入两输出(TITO)系统的解耦.给出了解耦控制器的详细设计过程,通过设计能够有效抵消缓慢极点或主导极点的滤波器以加快响应速度.在综合ISE指标的基础上发展了基于超调量和调节时间的参数整定指标.对所设计控制器进行次最优降阶,并验证输入、输出扰动性能和模型失配鲁棒性,仿真结果表明:所采用的解耦控制策略是有效的.
In order to improve the automatic control quality of the CFB boiler combustion system, the interaction between the main steam pressure and the bed temperature target in the process of regulation is analyzed and a decoupled system control structure is proposed. By selecting the above strong coupling targets, The decoupling of the two-input and two-output (TITO) system is achieved by using the compensation multivariable decoupling control strategy.The detailed design process of the decoupling controller is given, which can effectively offset the slow pole Or leading pole filter to speed up the response.A parameter tuning index based on overshoot and adjustment time is developed based on the integrated ISE index.The suboptimal reduction order of the designed controller is verified and the input and output disturbance Performance and model mismatch robustness. The simulation results show that the decoupling control strategy is effective.