NDLI: Stability robustness improvement of direct eigenspace assignment based feedback systems using singular value sensitivities

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Stability robustness improvement of direct eigenspace assignment based feedback systems using singular value sensitivities

Content Provider	NASA Technical Reports Server (NTRS)
Author	Garg, Sanjay
Copyright Year	1989
Description	A methodology to improve the stability robustness of feedback control systems designed using direct eigenspace assignment techniques is presented. The method consists of considering the sensitivity of the minimum singular value of the return difference transfer matrix at the plant input to small changes in the desired closed-loop eigenvalues and the specified elements of the desired closed-loop eigenvectors. Closed-form expressions for the gradient of the minimum return difference singular value with respect to desired closed-loop eigenvalue and eigenvector parameters are derived. Closed-form expressions for the gradients of the control feedback gains with respect to the specified eigenspace parameters are obtained as an intermediate step. The use of the gradient information to improve the guaranteed gain and phase margins in eigenspace assignment based designs is demonstrated by application to an advanced fighter aircraft.
File Size	1237373
Page Count	32
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19890018301
Archival Resource Key	ark:/13960/t9867dr1s
Language	English
Publisher Date	1989-08-01
Access Restriction	Open
Subject Keyword	Aircraft Stability And Control Robustness Mathematics Transient Response Systems Stability Control Systems Design Feedback Control Flight Control Siso Control Systems Sensitivity Algorithms Eigenvalues Control Stability Mathematical Models Eigenvectors Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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