本文讨论了目前通常采用的控制方法，深入分析了水位对象模型的动静特性。首先从锅炉汽包内水的热平衡、物质平衡原理出发，推导出了用来描述锅炉水位对象的通用机理控制模型，通过对几种控制方案的分析、研究与比较，选三冲量系统作为最佳控制方案，并着力研究三冲量系统的特点。-This thesis discusses the commonly used control method,　the static and dynamic characteristics of the water level in the object model are analysed in-depth. First departure from the thermal equilibrium of the water in the boiler drum, the material balance principle, to deduce a universal mechanism used to describe the object of the boiler water level control model, the analysis of several control programs, research and compare, choose the system of three impulses as the best control programs, and efforts to study the characteristics of the three impulses.