基于状态观测器的软测量动态补偿方法

Dynamic Compensation Method for Soft Sensing Based on State Observer

摘要: 荧光显微图像复原有着很多重要的应用，例如，天文成像，电子显微镜成像，单光子发射计算机断层成像术和正电子发射断针对采用机理分析方法得到的煤发热量存在响应速度迟缓、变负荷时动态误差大的问题，提出一种基于状态观测器的动态补偿方法。依据单元机组负荷–压力模型，由汽包压力和汽轮机一级压力构造锅炉总热量信号，采用一高阶惯性环节描述锅炉给煤量与总热量信号之间的动态关系。针对此高阶惯性环节设计状态观测器，得到具有较小惯性的中间状态信号，利用此信号除以给煤量得到煤发热量信号。实验结果表明：动态补偿后的煤发热量具有抗扰动性好、响应速度快的优点。

Abstract: The coal calorific value calculated by using the method of mechanism analysis has slow response speed and big dynamic error under variable load conditions. In order to solve this problem, a dy-namic compensation method based on state observer is proposed. Based on the load-pressure model of unit, the total heat input into the boiler is constructed by the drum pressure and the tur-bine primary pressure. The dynamic relationship between the boiler fuel flow and the total heat is described by a high order inertia link. By designing a state observer for the high order inertia link, the intermediate state signal with smaller inertia is obtained, which is divided by the fuel flow to gain the signal of the coal calorific value. The signal of coal calorific value has small dynamic error under variable load conditions, Experiments show that: the signal of coal calorific value has better behaviors on disturbance restraint and dynamic response.