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对经典的大型工业锅炉汽包水位三冲量自动控制方案进行了改进，仅用一台调节器便实现了带有前馈调节的双闭环反馈串级控制．改进方案是以一台伺服放大器来作为副调节器使用，由差压变送器（在给水母管上取流量信号）、开方器、分流器、伺服放大器，及经过电动执行机构和阀体回到给水母管的小闭环系统组成副回路．该副回路可实现对被控系统的失调、快调和粗调，缩短了调节通道，加速了调节过程，大大提高了整个系统的抗干扰能力，使被控对象（锅炉汽包水位）的动态和静态品质得以提高，锅炉虚假水位现象得以控制，还根据改进方案的控制理论设计了计算机控制系统，并利用软件编程方便的特点，实现了系统控制的超驰控制．
The improvement of the classic three-stroke automatic control scheme of the drum level of the large-scale industrial boiler was realized with a single closed-loop controller with double closed-loop feedback cascade control with feedforward adjustment. The improvement program uses a servo amplifier as a secondary regulator. The differential pressure transmitter (taking the flow signal on the water supply manifold), the squarer, the splitter, the servo amplifier, and the electric actuator and the valve body Back to the small loop of the water tube to form a secondary loop. The secondary circuit can realize the adjustment, quick adjustment and coarse adjustment of the controlled system, shorten the adjustment channel, speed up the adjustment process, greatly improve the anti-interference ability of the whole system, and make the dynamic of the controlled object (boiler drum water level) The static quality can be improved and the false water level in the boiler can be controlled. The computer control system is also designed according to the control theory of the improved scheme, and the overcontrol of the system control is achieved by utilizing the features of convenient software programming.