|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||340/963; 340/971; 340/946; 073/066; 244/208; 244/204; 244/207|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 1 인용 특허 : 6|
An onboard system for a rotary wing aircraft detects a limit cycle oscillation in the tail mast and provides a timely indication of the limit cycle oscillation to an aircrew before serious damage to the airframe is likely to occur.
What is claimed is: 1. A system to detect a limit cycle oscillation event in a rotary wing aircraft, comprising: a vibration sensor that outputs a signal to indicate vibration in a tail mast of the aircraft; a filter to limit the signal output from the sensor to a predetermined frequency range in which they limit cycle oscillation occurs; and a first switch to provide a first signal when the filtered signal output from the sensor exceeds a first predetermined amplitude for a predetermined duration; further comprising, a second switch to provide a secon...