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High-Redundancy Linear Electro-mechanical Actuator for Fault Tolerance

Hasmawati Antong

Dr. Roger Dixon and Dr. Christopher Ward

Loughborough University

UKACC PhD Presentation Showcase

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Introduction

Drawbacks of over-actuation Increase size and cost Employs only parallel configuration

Reduces efficiency

Useless if lock-up fault present

High-Redundancy Actuator (HRA) A new concept to fault tolerant actuator Actuation elements connected in series and parallel to

form a single actuator Improves reliability and availability Reduce over-sizing

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Research Objective and Proposed Configuration

Research objective:

To demonstrate the concept of high-redundancy actuator

(HRA) with 12 elements

3x4 series in parallel HRA Actuation element(linear EMA)

HRA test rig

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Work To Date

1) Actuator modeling2) Simulation Result

Actuator displacement : Single actuator = 12.5cm; HRA = 37cmOutput force : Single actuator = 0.4N; HRA = 1.2N

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Conclusion and future works

Conclusion Model of the single actuator and HRA has been obtained The HRA increase both displacement and force

Future Works 1) Real-time experiment

2) Fault-tolerant controller design

3) Health monitoring algorithm design

4) Evaluate performance of the overall system