原文传递
On-Line Loss of Control Detection Using Wavelets. Progress Report, 31 Jan. 2001 - 30 Sep. 2003.
| 题名： | On-Line Loss of Control Detection Using Wavelets. Progress Report, 31 Jan. 2001 - 30 Sep. 2003. |
| 作者： | Thompson, Peter M.; Klyde, David H.; Bachelder, Edward N.; Rosenthal, Theodore J. |
| 关键词： | *On-line-systems; *Wavelet-analysis; *Detection-; *Aircraft-control; *Algorithms-.;Flight-tests; Frequency-response; Fourier-transformation; Hardware-in-the-loop-simulation; Flight-safety; Nonlinearity-; Real-time-operation. |
| 摘要： | Wavelet transforms are used for on-line detection of aircraft loss of control. Wavelet transforms are compared with Fourier transform methods and shown to more rapidly detect changes in the vehicle dynamics. This faster response is due to a time window that decreases in length as the frequency increases. New wavelets are defined that further decrease the detection time by skewing the shape of the envelope. The wavelets are used for power spectrum and transfer function estimation. Smoothing is used to tradeoff the variance of the estimate with detection time. Wavelets are also used as front-end to the eigensystem reconstruction algorithm. Stability metrics are estimated from the frequency response and models, and it is these metrics that are used for loss of control detection. A Matlab toolbox was developed for post-processing simulation and flight data using the wavelet analysis methods. A subset of these methods was implemented in real time and named the Loss of Control Analysis Tool Set or LOCATS. A manual control experiment was conducted using a hardware-in-the-loop simulator for a large transport aircraft, in which the real time performance of LOCATS was demonstrated. The next step is to use these wavelet analysis tools for flight test support. |
| 报告类型： | 科技报告 |
相关文献
- On-Line Loss of Control Detection Using Wavelets
- A REPORT OF MULTIPLE DEATHS ON PASSENGER VESSELS UNDER 100 GROSS TONS FROM JAN. 1, 1992 TO JUNE 30, 2001.
- A Flight Training Simulator for Instructing the Helicopter Autorotation Maneuver (Enhanced Version)
- Motor Vehicle Occupant Safety Survey, 2003. Volume 2: Safety Belt Report.
- A LOOK AT THE RECENT HISTORY OF PASSENGER INJURIES ON U.S. FLAGGED, U.S. COAST GUARD INSPECTED PASSENGER VESSELS LESS THAN 100 GROSS TONS.
- Comprehension of Navigation Directions
检索历史
应用推荐
