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System IDentification Programs for AirCraft (SIDPAC)
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Author and Affiliation:
Morelli, Eugene A.(NASA Langley Research Center, Hampton, VA United States)
Abstract: A collection of computer programs for aircraft system identification is described and demonstrated. The programs, collectively called System IDentification Programs for AirCraft, or SIDPAC, were developed in MATLAB as m-file functions. SIDPAC has been used successfully at NASA Langley Research Center with data from many different flight test programs and wind tunnel experiments. SIDPAC includes routines for experiment design, data conditioning, data compatibility analysis, model structure determination, equation-error and output-error parameter estimation in both the time and frequency domains, real-time and recursive parameter estimation, low order equivalent system identification, estimated parameter error calculation, linear and nonlinear simulation, plotting, and 3-D visualization. An overview of SIDPAC capabilities is provided, along with a demonstration of the use of SIDPAC with real flight test data from the NASA Glenn Twin Otter aircraft. The SIDPAC software is available without charge to U.S. citizens by request to the author, contingent on the requestor completing a NASA software usage agreement.
Publication Date: Jan 01, 2002
Document ID:
20030006686
(Acquired Jan 31, 2003)
Subject Category: COMPUTER PROGRAMMING AND SOFTWARE
Report/Patent Number: AIAA Paper 2002-4704
Document Type: Conference Paper
Meeting Information: AIAA Atmospheric Flight Mechanics Conference; 5-8 Aug. 2002; Monterey, CA; United States
Meeting Sponsor: American Inst. of Aeronautics and Astronautics; Reston, VA United States
Financial Sponsor: NASA Langley Research Center; Hampton, VA United States
Organization Source: NASA Langley Research Center; Hampton, VA United States
Description: 19p; In English; Original contains color illustrations
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright; Distribution as joint owner in the copyright
NASA Terms: COMPUTER PROGRAMS; DATA PROCESSING; ERRORS; ESTIMATING; EXPERIMENT DESIGN; SYSTEM IDENTIFICATION; COMPATIBILITY; DOMAINS; FLIGHT TESTS; REAL TIME OPERATION; SIMULATION; WIND TUNNELS
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