基于滑模观测器的电流传感器故障监测系统设计

Design of current sensor fault monitoring system based on sliding mode observer

摘要:

为了保证电流传感器的工作效率,为设备维护提供有效参考,利用滑模观测器优化设计了电流传感器故障监测系统。加设滑模观测器,改装数据采集器、信号处理器等设备,调整系统的电路连接方式,在抗干扰约束下,完成硬件系统的优化设计。根据电流传感器的工作原理和故障特征,构建电流传感器故障数学模型。利用滑模观测器及其逻辑原理,实时收集电流传感器的运行信号。根据传感器故障特征,选择并计算电流传感器的故障监测指标,通过与设置故障标准的比对,输出可视化的电流传感器故障监测结果。通过系统测试实验得出,基于滑模观测器的电流传感器故障监测系统的指标监测误差、故障类型误检率和漏检率均低于预设值,由此证明优化设计系统具有良好的故障监测功能。

Abstract:

In order to ensure the working efficiency of the current sensor and provide an effective reference for equipment maintenance, the current sensor fault monitoring system is optimized and designed using the sliding mode observer. Add a sliding mode observer, refit data collectors, signal processors and other equipment, adjust the circuit connection mode of the system, and complete the optimal design of the hardware system under the constraints of anti-interference. According to the working principle and fault characteristics of the current sensor, the fault mathematical model of the current sensor is constructed. Using the sliding mode observer and its logic principle, the running signal of the current sensor is collected in real time. According to the fault characteristics of the sensor, the fault monitoring index of the current sensor is selected and calculated, and the visual fault monitoring result of the current sensor is output by comparing with the set fault standard. Through the system test experiment, it is concluded that the index monitoring error, fault type false detection rate and missed detection rate of the current sensor fault monitoring system based on the sliding mode observer are all lower than the preset values, which proves that the optimal design system has good fault monitoring. Function.