直升机驾驶舱异常振动分析

Helicopter Cockpit Abnormal Vibration Analysis

对某型直升机振动过大的原因进行了分析,通过频谱分析法找到引起直升机振动过大的特征频率,对特征频率进行分析和判断,通过试验验证最终确定引起直升机振动过大的原因:是由飞行控制系统介入引起的直升机强迫振荡问题。并进一步提出改进措施,最终使得直升机振动水平大大降低。

Analyzed the causes of one helicopter abnormal vibration, found the characteristic frequency caused excessive vibration through spectrum analysis, then analyzed and judged the characteristic frequency. Finally, the cause of helicopter vibration is confirmed through experiment, which was due to the flight control system in the helicopter forced oscillation problem. At last, the further improve measures were proposed, and ultimately made the helicopter vibration level greatly reduced.