Accession Number : AD0721728

Title :   Analytic Comparison of Helicopter Hover Control Systems.

Descriptive Note : Research and development technical rept.,

Corporate Author : ARMY ELECTRONICS COMMAND FORT MONMOUTH N J

Personal Author(s) : Niemela,R. John , Jr

Report Date : DEC 1970

Pagination or Media Count : 63

Abstract : The effectiveness of an attitude feedback and a translational velocity feedback flight control system are assessed for their ability to provide positional stability and reduce the pilot's task at hover. The significance of helicopter hover dynamics is discussed with respect to positional stability. The helicopter pilot is viewed as a control element to provide positional stability at hover in the presence of wind gusts. The velocity feedback control is compared with the attitude feedback and found to have a significantly lower mean squared positional error and to require less pilot effort. The frequency of exceeding a specific value of positional error and its relation to the power spectral density of positional error is discussed. (Author)

Descriptors :   (*FLIGHT CONTROL SYSTEMS, *HELICOPTERS), (*HOVERING, FLIGHT CONTROL SYSTEMS), ATTITUDE CONTROL SYSTEMS, FEEDBACK, STABILITY, GUSTS, ERRORS, THESES

Subject Categories : Helicopters

Distribution Statement : APPROVED FOR PUBLIC RELEASE