摘要
主螺栓水位优化控制问题,由于核电站主螺栓超声检测过程中的水位存在使探头高度急剧变化,对模型参数变化无法预知等特点,要求探头高度快速变化时使水位控制达到动态响应性能。为改善控制稳定性及动态响应特性,提出用模糊控制和PID控制相结合,设计了隶属度函数和模糊规则,应用于主螺栓超声检测的水位控制。使用MATLAB对控制系统进行仿真,进行了探头高度变化阶跃响应试验。仿真结果表明,即使在各种参数改变和探头高度快速变化的情况下,通过模糊PID控制实现水位的快速稳定跟踪。证明实施的控制方案具有较好的鲁棒性和自适应能力。
Dynamic tracking is demanded for primary bolt ultrasonic inspection in nuclear power plant. It is fea- tured by rapid probe height variation, unpredictable modeling parameters variations and so on. The paper discussed leveling dynamic characteristics of NPP primary bolt inspection, with rapid variation of modeling parameters and probe height. To improve control stability and dynamic response, the fuzzy control was combined with PID control, which was applied to the leveling control of bolt ultrasonic inspection. MATLAB was utilized to simulate the control system, and simulations for corresponding step response, variation of modeling parameters, actual operation condition and electrical noise were also implemented. Result reveals that rapid stable tracking can be obtained with fuzzy PID control algorithm even with parameters fluctuation variation and rapid variation of probe elevation. The implemented control schemes have better robustness and self- adaptable ability.
出处
《计算机仿真》
CSCD
北大核心
2012年第8期309-312,317,共5页
Computer Simulation
