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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.