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System identification methods for aircraft flight control development and validationSystem-identification methods compose a mathematical model, or series of models, from measurements of inputs and outputs of dynamic systems. The extracted models allow the characterization of the response of the overall aircraft or component subsystem behavior, such as actuators and on-board signal processing algorithms. This paper discusses the use of frequency-domain system-identification methods for the development and integration of aircraft flight-control systems. The extraction and analysis of models of varying complexity from nonparametric frequency-responses to transfer-functions and high-order state-space representations is illustrated using the Comprehensive Identification from FrEquency Responses (CIFER) system-identification facility. Results are presented for test data of numerous flight and simulation programs at the Ames Research Center including rotorcraft, fixed-wing aircraft, advanced short takeoff and vertical landing (ASTOVL), vertical/short takeoff and landing (V/STOL), tiltrotor aircraft, and rotor experiments in the wind tunnel. Excellent system characterization and dynamic response prediction is achieved for this wide class of systems. Examples illustrate the role of system-identification technology in providing an integrated flow of dynamic response data around the entire life-cycle of aircraft development from initial specifications, through simulation and bench testing, and into flight-test optimization.
Document ID
19960003220
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Tischler, Mark B.
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
September 6, 2013
Publication Date
October 1, 1995
Subject Category
Aircraft Stability And Control
Report/Patent Number
A-950097
NIPS-95-05604
NAS 1.15:110369
NASA-TM-110369
USAATCOM-TR-95-A-007
Report Number: A-950097
Report Number: NIPS-95-05604
Report Number: NAS 1.15:110369
Report Number: NASA-TM-110369
Report Number: USAATCOM-TR-95-A-007
Accession Number
96N13229
Funding Number(s)
PROJECT: RTOP 505-59-36
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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