基于自适应LS-SVM的雷达T/R组件热管冷却故障诊断系统设计

Design of Fault Diagnosis System for Heat Pipe Cooling of Radar T/R Module Based on Adaptive LS-SVM

摘要:

传统雷达T/R组件热管冷却故障诊断系统受到表面振动信号干扰，存在诊断精度较差的问题，针对该问题，提出了基于自适应LS-SVM的雷达T/R组件热管冷却故障诊断系统设计。根据雷达T/R组件热管冷却工作原理，设计该故障检测系统的结构和功能，其中系统设备是由数字化收发芯片、VXI总线多DSP并行处理模块、控制电路和故障诊断电路构成的，通过数字化收发芯片，产生相应脉冲压缩雷达信号，采用TMS302VC5409型号芯片设计的DSP并行处理模型，对缺少上拉电阻的中断输入口设置多个引脚，将信号由电缆传送至驱动电路中，达到雷达波束控制目的。采用霍尔元件对电路进行诊断，经过故障样本特征提取，引用自适应加权 LS-SVM，确定故障类型，根据诊断流程，完成故障诊断系统设计。通过实验结果可知，该系统最低诊断精度也可达到92%以上，为雷达稳定运行提供支持。

Abstract:

The traditional radar T/R component heat pipe cooling fault diagnosis system is disturbed by surface vibration signals, and there is a problem of poor diagnostic accuracy. Aiming at this problem, the design of radar T/R component heat pipe cooling fault diagnosis system based on adaptive LS-SVM is proposed. According to the working principle of heat pipe cooling of radar T/R components, the structure and function of the fault detection system are designed. The system equipment is composed of digital transceiver chip, VXI bus multi-DSP parallel processing module, control circuit and fault diagnosis circuit. The chip generates the corresponding pulse compression radar signal, adopts the DSP parallel processing model designed by the TMS302VC5409 model chip, sets multiple pins for the interrupt input port lacking the pull-up resistor, and transmits the signal from the cable to the drive circuit to achieve the purpose of radar beam control. . The Hall element is used to diagnose the circuit. After the fault sample feature extraction, the adaptive weighted LS-SVM is used to determine the fault type, and the fault diagnosis system is designed according to the diagnostic process. The experimental results show that the minimum diagnostic accuracy of the system can reach more than 92%, which provides support for stable operation of the radar.