Chen, L;
Edwards, C;
Alwi, H;
Sato, M;
(2022)
Simultaneous Fault and Input Time Delay Estimation for an Actuator System: Theory and Flight Data Validation.
IEEE Control Systems Letters
, 6
pp. 1172-1177.
10.1109/LCSYS.2021.3090654.
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Abstract
This letter proposes a first order sliding mode observer for the purpose of simultaneously estimating the unknown input time delay and reconstructing the loss of effectiveness in a model of an actuator. The adaptive algorithm is driven by the 'equivalent output error injection' signal associated with the sliding motion. Sufficient conditions are given to ensure finite time convergence of the state estimation error system, ensuring both the time delay estimation error and the estimation error associated with the actuator fault converge to a small region around zero. The efficacy of the approach has been evaluated via both a numerical simulation and flight data validation.
| Type: | Article |
|---|---|
| Title: | Simultaneous Fault and Input Time Delay Estimation for an Actuator System: Theory and Flight Data Validation |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/LCSYS.2021.3090654 |
| Publisher version: | http://dx.doi.org/10.1109/LCSYS.2021.3090654 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Fault detection; Delay systems; Variablestructure/sliding-mode control |
| UCL classification: | UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10146734 |
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