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锅炉蒸汽压力是表征锅炉运行状态的重要参数。针对燃料–汽压系统,提出一种新颖的动态面控制方法,控制系统中只采用了锅炉蒸汽压力信号。将拟合得到的燃料-汽压对象的数学模型转化为状态方程;采用锅炉蒸汽压力信号构造状态观测器对状态进行估计;利用动态面控制方法设计控制器,由于引入一阶低通滤波器,动态面控制克服了传统反演方法的“微分爆炸”现象;通过Lyapunov稳定性分析方法证明闭环系统的信号半全局一致有界,并且跟踪误差可以通过调节控制参数达到任意小。仿真结果表明锅炉蒸汽压力能够较快跟踪给定信号,证明了该控制方法的有效性。
Boiler steam pressure is an important parameter to characterize the boiler operating status. Aiming at the fuel - steam pressure system, a novel dynamic surface control method is proposed, in which only the boiler steam pressure signal is used. The mathematical model of the fuel-vapor pressure object is fitted into the equation of state. The state observer is used to construct the state observer to estimate the state. The controller is designed by the dynamic surface control method. Due to the introduction of the first-order low-pass filter, The dynamic surface control overcomes the phenomenon of “differential explosion” of the traditional inversion method. The Lyapunov stability analysis proves that the signals of the closed-loop system are uniformly bounded and the tracking error can be adjusted to any small value by adjusting the control parameters. The simulation results show that the boiler steam pressure can track the given signal faster, which proves the effectiveness of the control method.