热力容器液位系统的非线性鲁棒无扰切换控制研究

项目名称： 热力容器液位系统的非线性鲁棒无扰切换控制研究

项目编号： No.51206054

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 工程热物理与能源利用学科

项目作者： 吴婕

作者单位： 华南理工大学

项目金额： 25万元

中文摘要： 热力容器系统如核电站除氧器液位系统等为被控特性复杂多变的对象，不仅表现出有扰、参数不确定、多变量、大时滞等特性，且其动态特性和参数随工况变化而大幅度变动，具较强非线性、不确定和时滞特性。因此，对复杂热力容器系统而言，不可能用单一固定的线性模型来描述，更不可能用固定线性控制器来保证其在大工况范围内的控制品质。 本项目通过新的热力容器液位对象非线性模型重构，针对其不确定性及时滞性，设计非线性鲁棒无扰切换液位控制结构。基于热力容器液位不确定参数模型，围绕无扰切换系统稳定性分析，考虑非线性模型替换重构、不确定性函数矩阵条件满足、鲁棒性能指标参数选取、无扰软切换原则及具 有界无扰补偿器设计等关键问题，展开对适用于热力容器液位鲁棒无扰切换控制新理论和新算法的研究，并对闭环系统稳定性进行分析。研究成果将为提高核电站除氧器液位控制设计运行的准确性和稳定性，提供一定理论和实践依据。

中文关键词： 热力容器液位建模；鲁棒控制；滑模控制；预测控制；

英文摘要： The thermal water levels such as the deaerator water level in nuclear power plants are complex nonlinear time-varying objects with the following characterisitcs: uncertain parameters, noise interferences, multi-variable and large time-delay. The dynamic features and parameters of such water level control models are largely affected by their operation conditions, accordingly with strong nonlinearity， uncertainity and time-delay in nature. Therefore, a complex thermal water level system can not be simply described by certain single linear model, and its control performance cannot be guaranteed by a fixed linear controller when having variations in operation conditions. This study aimes at a nonlienar robust control with uncertainity and an artificial intelligent nonlinear predictive switching control design, via a novel pathway of restructuring nonlinear model of the thermal water levels. The key issues of this study focuse on the substitution methods of reforming nonlinear models, the criteria of uncertain function matrixes, the selection of robust performance index parameters, design of the nonlinear predictive control, the switching principle and the bounded bumpless transfer control principle. The study investigates novel theories and algorithms of the nonolinear artificial intelligent robust control for th

英文关键词： Thermal Modelling of Water Levels；Robust Control；Sliding Mode Control；Predictive Control；