Flight-Test Results of Propulsion-Only Emergency Control System on MD-11 Airplane
| Autor: | John J. Burken, Frank W. Burcham |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
Engineering
business.product_category business.industry Applied Mathematics Aerospace Engineering Thrust Flight control surfaces Propulsion Flight test Airplane Space and Planetary Science Control and Systems Engineering Control theory Backup Control system Electrical and Electronic Engineering business Simulation |
| Zdroj: | Journal of Guidance, Control, and Dynamics. 20:980-987 |
| ISSN: | 1533-3884 0731-5090 |
| DOI: | 10.2514/2.4143 |
| Popis: | A large, civilian, multiengine transport MD-11 airplane control system was recently modie ed to perform as an emergency backup controller using engine thrust only. The emergency backup system, referred to as the propulsion-controlled aircraft (PCA)system, would be used if a majorprimary e ight control system fails. To allow for longitudinal- and lateral-directional control, the PCA system requires at least two engines and is implemented through software modie cations. A e ight-test program was conducted to evaluate the PCA system high-altitude e ying characteristics and to demonstrate its capacity to perform safe landings. The cruise e ight conditions, several low approaches, and four landings without any aerodynamic e ight control surface movement were demonstrated; however, only one landing is presented. Results that show satisfactory performance of the PCA system in the longitudinal axis are presented. Test results indicate that the lateral-directional axis of the system performed well at high altitude but was sluggish and prone to thermal upsets during landing approaches. Flight-test experiences and test techniques are also discussed, with emphasis on the lateral-directional axis because of the dife culties encountered in e ight test. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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