Robust Feedback Linearization Approach to Pitch Autopilot Design

Abstract:

This paper presents a robust Feedback Linearization (FL) based pitch plane autopilot design for a highly maneuvering, skid-to-turn, tail controlled tactical missile. Owing to the highly nonlinear missile dynamics, firstly a feedback linearization based controller is proposed. As the resulting design lacks robustness, the issue is addressed by robustifyng the FL based controller using Extended State Observer (ESO). The system uncertainties are estimated by the ESO and the estimate is used in the FL control to nullify it’s effect. A novel feature of this technique is that it does not require any knowledge of the system uncertainty. Simulation results are presented to demonstrate the effectiveness of the proposed approach.

• Periodical: Advanced Materials Research (Volumes 403-408)
• Pages: 4667-4673
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.403-408.4667
• Online since: November 2011
• Authors: Ashwini A. Godbole, S. E. Talole
• Keywords: Extended State Observer, Feedback Linearization, Pitch Autopilot, Robust Control

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