A module and a method for acquiring and processing a vibration signal of the rotating component of a helicopter

Abstract

The invention belongs to the technical field of avionics and relate to a module and a method for acquiring and processing a vibration signal of the rotating component of a helicopter. The module comprises a sensor interface circuit, a programmable amplifier, an anti-aliasing filter, an A/D converting circuit, and a FPGA which are successively connected. The method comprises steps of using a vibration sensor to input the vibration signal into the sensor interface circuit in order to convert the vibration signal into a voltage signal, and passing the voltage signal through a high-pass filter in the sensor interface circuit in order to filter a DC component in the voltage signal. Compared with a CPU-controlled A/D converting manner, a FPGA-controlled A/D converting manner increases sampling frequency and sampling realtimeness. By using anti-aliasing filtering technology, the order and the cut-off frequency of the filter can be set flexibly; the stop band descending slope of the filter is increased; and a signal anti-interference capability is enhanced.

Description

technical field [0001] The invention belongs to the technical field of avionics, and relates to a vibration signal acquisition and processing module and a processing method of a rotating part of a helicopter. Background technique: [0002] The failure of helicopter rotors, tail rotors, transmission systems and other moving parts directly affects the flight safety of helicopters, so monitoring and diagnosing the moving parts of helicopters has become one of the important contents of equipment support. Due to the special structure of the helicopter, it is difficult to achieve redundant design for some key components. Once a failure occurs, it will cause serious consequences. Therefore, it is necessary to monitor the moving parts of the helicopter in real time, predict possible failures in advance, and avoid accidents. [0003] HUMS is the abbreviation of Helicopter Health and Usage Monitoring System (literally translated as Health and Usage Monitoring System). By monitoring th...

AI Technical Summary

Problems solved by technology

At present, the research foundation of the domestic helicopter fault diagnosis system is relatively weak, only some universities and research institutes have carried out some preliminary research in different fields, and the helicopter fault diagnosis technology is still in the exploratory stage, which cannot meet the needs of helicopter maintenance

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