摘要
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.
出处
《航空科学技术》
2016年第11期34-38,共5页
Aeronautical Science & Technology
关键词
直升机
驾驶舱
频谱分析
振动
气动伺服弹性
强迫振荡
helicopter
cockpit
spectrum analysis
vibration
aeroservoelasticity ~ forced oscillation