The invention belongs to the technical field of helicopter test, and discloses a wheel type undercarriage helicopter ground resonance test method, which comprises the following steps: firstly, determining whether the stability margin of a wheel type undercarriage helicopter can be subjected to a resonance test, and then installing an acceleration sensor and a displacement sensor at each key part of the wheel type undercarriage helicopter, all the sensors and onboard signals are connected with a data acquisition and analysis device; setting a helicopter test state, and exciting the wheel type undercarriage helicopter by a driver through a steering column according to a set frequency in the set state; and finally, collecting and analyzing data sent by the sensors and onboard signals, and determining whether ground resonance occurs in the current helicopter test state or not. And setting a next helicopter test state, and repeating the step 3 and the step until all tests in preset test states are completed. According to the invention, actually measured data can be provided for theoretical model correction, and a reliable test method is provided for mastering ground resonance design of the wheeled undercarriage helicopter.
本发明属于直升机试验技术领域,公开了一种轮式起落架直升机地面共振试验方法,首先确定轮式起落架直升机的稳定裕度是否能够进行共振试验,再在轮式起落架直升机的各个关键部位安装加速度传感器、位移传感器,并将各传感器和机上信号连接数据采集分析装置;设定直升机试验状态,在设定状态下驾驶员通过驾驶杆对轮式起落架直升机按照设定频率进行激励;最后采集和分析各传感器和机上信号发来的数据,确定当前直升机试验状态是否会发生地面共振;设定下一个直升机试验状态,重复步骤三和本步骤,直至完成所有预设试验状态的试验。本发明能够为理论模型修正提供实测数据,为掌握轮式起落架直升机地面共振设计提供可靠的试验方法。
Ground resonance test method for wheeled undercarriage helicopter
一种轮式起落架直升机地面共振试验方法
2023-08-01
Patent
Electronic Resource
Chinese
IPC: | B64F GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT , Boden- oder Flugzeugträgerdeckeinrichtungen besonders ausgebildet für die Verwendung in Verbindung mit Luftfahrzeugen / G01M TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES , Prüfen der statischen oder dynamischen Massenverteilung rotierender Teile von Maschinen oder Konstruktionen |
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