控制棒驱动机构智能感知与自适应控制系统设计及仿真验证

控制棒驱动机构作为核反应堆控制和核安全保护系统的执行机构,对其运行状态进行有效监测是防止反应堆发生控制棒卡棒、滑棒和驱动失灵,保障核反应堆安全经济运行的必要手段。本文在研究分析控制棒驱动机构线圈电流和振动信号特征的基础上构建了控制棒驱动机构状态判别与故障诊断模型,并基于dSPACE实时仿真系统建立了控制棒驱动系统自适应控制数字化模型和控制棒驱动机构智能感知与自适应控制实验样机。通过功能验证,证明该系统能根据电流和振动信号实现对控制棒驱动机构正常运行工况和典型故障模式的实时判别、故障诊断与自适应控制,运行状态识别准确率达到99.2%以上,为后续核反应堆智能设备的研制提供参考。

Design and Simulation of Intelligent Perception and Adaptive Control System for Control Rod Drive Mechanism

The control rod drive mechanism (CRDM) is the actuator of the reactor control and nuclear safety protection system. In order to prevent the occurrence of control rod stuck, sliding rod and driving failure in the reactor and to ensure the safe and economic operation of the reactor, a necessary measure is to effectively monitor the operation status of the CRDM. In this paper, the status discrimination and fault diagnosis model for CRDM is constructed by analyzing the characteristics of the coil current and vibration signals. Furthermore, an adaptive control digital model of control rod drive system, as well as an experimental prototype of the CRDM perception and diagnosis system are built based on the real-time simulation system dSPACE. Through functional verification, the system can perform real-time identification, fault diagnosis and adaptive control of the normal and faulty operating conditions of CRDM based on the current and vibration signals. The recognition accuracy rate for various working conditions reaches more than 99.2%, providing supportive reference for the subsequent nuclear reactor intelligent equipment development.