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Article
Inner-Loop Control for Electromechanical „EMA… Flight Surface Actuation Systems
Journal of Dynamic Systems, Measurement and Control, Transactions of the ASME
  • Saeid Habibi, McMaster University
  • Jeff Roach, Boeing
  • Greg R. Luecke, Iowa State University
Document Type
Article
Publication Version
Published Version
Publication Date
9-1-2008
DOI
10.1115/1.2936382
Abstract

This manuscript pertains to the application of an inner-loop control strategy to electromechanical flight surface actuation systems. Modular electromechanical actuators (EMAs) are increasingly used in lieu of centralized hydraulics for the control of flight surfaces in the aerospace sector. The presence of what is termed as a dead zone in these actuators significantly affects the maneuverability, stability, and the flight profiles of aircrafts that use this actuation concept. The hypothesis of our research is that flight surface actuation systems may be desensitized to the effects of dead zone by using a control strategy with multiple inner loops. The proposed strategy involves (a) high-gaininner-loop velocity control of the driving motor and (b) inner-loop compensation for the differential velocity between the motor versus the aileron. The above hypothesis is confirmed by theoretical and simulated analyses using the model of an EMA flight surface actuator. Our results indicate that for small input signals, this strategy is very effective and that it can (a) considerably increase the bandwidth and the crossover frequency of the system and (b) considerably improve the time response of the system. Further to this analysis, this manuscript presents guidelines for the design of EMA systems.

Comments

This article is from Journal of Dynamic Systems, Measurement and Control, Transactions of the ASME 130 (2008): 0510021, doi: 10.1115/1.2936382. Posted with permission.

Copyright Owner
American Society of Mechanical Engineers
Language
en
File Format
application/pdf
Citation Information
Saeid Habibi, Jeff Roach and Greg R. Luecke. "Inner-Loop Control for Electromechanical „EMA… Flight Surface Actuation Systems" Journal of Dynamic Systems, Measurement and Control, Transactions of the ASME Vol. 130 Iss. 5 (2008) p. 0510021 - 05100213
Available at: http://works.bepress.com/greg_luecke/3/