Accession Number : AD0759919

Title :   Optimal Design of Helicopter Precision Hover Control Systems.

Descriptive Note : Research and development technical rept.,

Corporate Author : ARMY ELECTRONICS COMMAND FORT MONMOUTH N J

Personal Author(s) : Purl,N. N. ; Niemela,R. J.

Report Date : APR 1973

Pagination or Media Count : 35

Abstract : 1-F-162202-AA-9713(*helicopters, hovering), (*flight control systems, helicopters), stability, equations of motion, accuracy, optimizationcomputer aided analysisModern Control Theory is employed to analytically determine the limit of positional precision with which a helicopter can be hovered. Approaches based on Liapunov's Second Method and a Squared Root Locus Method are formulated to this optimal control problem. Both of these methods avoid iterative solution of the Matrix Riccati Equation. The Squared Root Locus Method is developed as a computer algorithm which generates optimal control designs as a function of performance index and helicopter stability/control derivatives. Practical design constraints can readily be interpreted from the results of this formulation. (Author)

Descriptors :   (*HELICOPTERS, HOVERING), (*FLIGHT CONTROL SYSTEMS, HELICOPTERS), STABILITY, EQUATIONS OF MOTION, ACCURACY, OPTIMIZATION

Subject Categories : Helicopters

Distribution Statement : APPROVED FOR PUBLIC RELEASE