Patel, Vijay V and Deodhare, Girish and Chetty, Shyam (2002) Near real time stability margin estimation from piloted 3-2-1-1 inputs (AIAA 2002-5820). In: AIAA's Aircraft Technology, Integration, and Operations (ATIO) 2002 Technical, 1-3 Oct 2002, Los Angeles, California.
![[img]](https://nal-ir.nal.res.in/style/images/fileicons/application_pdf.png) |
PDF
2002-5820.pdf Restricted to Registered users only Download (588kB) |
![[img]](https://nal-ir.nal.res.in/style/images/fileicons/other.png) |
Indexer Terms (Generate index codes conversion from application/pdf to indexcodes)
indexcodes.txt Restricted to Registered users only Download (7kB) |
Abstract
Near Real Time estimation of stability13; (gain and phase) margins using flight test data from13; development flights of a new aircraft facilitates cost effective flight envelope expansion. Methods based13; on FFT, Z-transforms etc. have been proposed to13; meet this requirement. In this paper a new method13; combining FFT techniques and parameter estimation13; in the frequency domain has been used to accurately13; determine the stability margin of the longitudinal axis13; of a FBW fighter aircraft. Typically during initial13; flight tests of a new aircraft only flight data from13; piloted time domain inputs such as doublets or 3-2-1-13; 1 are available for analysis even though sine sweeps13; are the preferred inputs for determining stability13; margins. Further the aircraft response signals due to13; these inputs have lower bandwidth compared to the13; typical gain and phase crossover frequencies of the13; aircraft + control law loop transfer function. Hence13; estimating the stability margins from these low13; bandwidth signals is a challenging problem.
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Additional Information: | Copyright for this article belongs to American Institute of Aeronautics and Astronautics |
| Uncontrolled Keywords: | Flight data analysis;ELS simulation;Light combat aircraft (LCA) |
| Subjects: | AERONAUTICS > Aeronautics (General) |
| Depositing User: | Mr. N A |
| Date Deposited: | 01 Apr 2009 |
| Last Modified: | 24 May 2010 04:10 |
| URI: | http://nal-ir.nal.res.in/id/eprint/1044 |
Actions (login required)
 |
View Item |
