국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Loop Shaping Control Design for a Supersonic Propulsion System Model Using Quantitative Feedback Theory (QFT) Specifications and Bounds
저자	Connolly, Joseph W.;; Kopasakis, George
Keyword	COMPUTATIONAL FLUID DYNAMICS;; CONTROL SYSTEMS DESIGN;; DYNAMIC MODELS;; FEEDBACK CONTROL;; FLOW DISTRIBUTION;; INLET PRESSURE;; J-85 ENGINE;; LOOPS;; NONLINEARITY;; OSCILLATIONS;; PROPULSION SYSTEM PERFORMANCE;; SERVOMECHANISMS;; SPECIFICATIONS;; SUPERSONIC FLIGHT;; SUPERSONIC INLETS;; SUPERSONIC TRANSPORTS;; SUPERSONIC WIND TUNNELS;; THRUST AUGMENTATION
URL	http://hdl.handle.net/2060/20100040421
보고서번호	NASA/TM-2010-216897
발행년도	2010
출처	NTRS (NASA Technical Report Server)
ABSTRACT	This paper covers the propulsion system component modeling and controls development of an integrated mixed compression inlet and turbojet engine that will be used for an overall vehicle Aero-Propulso-Servo-Elastic (APSE) model. Using previously created nonlinear component-level propulsion system models, a linear integrated propulsion system model and loop shaping control design have been developed. The design includes both inlet normal shock position control and jet engine rotor speed control for a potential supersonic commercial transport. A preliminary investigation of the impacts of the aero-elastic effects on the incoming flow field to the propulsion system are discussed, however, the focus here is on developing a methodology for the propulsion controls design that prevents unstart in the inlet and minimizes the thrust oscillation experienced by the vehicle. Quantitative Feedback Theory (QFT) specifications and bounds, and aspects of classical loop shaping are used in the control design process. Model uncertainty is incorporated in the design to address possible error in the system identification mapping of the nonlinear component models into the integrated linear model.