Modelling and control of a high redundancy actuator

Du, X., Dixon, R., Goodall, R. M. and Zolotas, Argyrios (2010) Modelling and control of a high redundancy actuator. Mechatronics, 20 (1). 102 - 112. ISSN 0957-4158

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Modelling and control of a high redundancy actuator
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The high redundancy actuation concept is a completely new approach to fault tolerance, and it is important to appreciate that it provides a transformation of the characteristics of actuators so that the actuation performance (capability) degrades slowly rather than suddenly failing, even though individual elements themselves fail. This paper aims to demonstrate the viability of the concept by showing that a highly redundant actuator, comprising a relatively large number of actuation elements, can be controlled in such a way that faults in individual elements are inherently accommodated, although some degradation in overall performance will inevitably be found. The paper introduces the notion of fault-tolerant systems and the highly redundant actuator concept. Then a model for a two by two configuration with electro-mechanical actuation elements is derived. Two classical control approaches are then considered based on frequency domain techniques. Finally simulation results under a number of faults show the viability of the approach for fault accommodation without re-configuration

Additional Information:Special issue on Servo Control for Data Storage and Precision Systems, from 17th IFAC World Congress 2008.
Keywords:Classical control, mechatronics, Actuators, redundancy, Fault tolerance
Subjects:H Engineering > H660 Control Systems
H Engineering > H100 General Engineering
G Mathematical and Computer Sciences > G150 Mathematical Modelling
Divisions:College of Science > School of Engineering
ID Code:15060
Deposited On:01 Oct 2014 08:35

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