Model-Based Condition-Monitoring and Jamming-Tolerant Control of an Electro-Mechanical Flight Actuator with Differential Ball Screws

The work deals with the development of deterministic model-based condition-monitoring algorithms for an electromechanical flight control actuator with fault-tolerant architecture, in which two permanent magnets synchronous motors are coupled with differential ball screws in speed-summing paradigm, s...

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Bibliographic Details
Published in:Actuators 2021-09, Vol.10 (9), p.230
Main Authors: Di Rito, Gianpietro, Luciano, Benedetto, Borgarelli, Nicola, Nardeschi, Marco
Format: Article
Language:English
Subjects:
Actuators
Aerospace safety
Aircraft
Algorithms
Aviation
Ball screws
Condition monitoring
electro-mechanical actuators
Fault tolerance
First principles
Flight control
Jamming
Knowledge
modelling
Monitoring systems
Permanent magnets
Reconfiguration
Safety critical
simulation
Synchronous motors
testing
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Summary:The work deals with the development of deterministic model-based condition-monitoring algorithms for an electromechanical flight control actuator with fault-tolerant architecture, in which two permanent magnets synchronous motors are coupled with differential ball screws in speed-summing paradigm, so that the system can operate even after a motor fault, an inverter fault or a mechanical jamming. To demonstrate the potential applicability of the system for safety-critical aerospace applications, the failure transients related to major fault modes have to be characterised and analysed. By focusing the attention to jamming faults, a detailed nonlinear model of the actuator is developed from physical first principles and experimentally validated in both time and frequency domains for normal condition and with different types of jamming. The validated model is then used to design the condition-monitoring algorithms and to characterize the system failure transient, by simulating mechanical blocks in different locations of the transmission. The operability after the fault, obtained via fault-tolerant control strategy and position regulator reconfiguration, is also verified, by highlighting and discussing possible enhancements and criticalities.
ISSN:2076-0825
2076-0825
DOI:10.3390/act10090230