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Title: Enhancing safety in active suspension systems
Author: Jeppesen, B. P.
Awarding Body: University of Cambridge
Current Institution: University of Cambridge
Date of Award: 2003
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Chapter 3 describes how a distributed control system architecture was designed, to fulfil the functional specification required of the vehicle. A safety review was performed on the conceptual design, which identified requirements for the control software and the need for an independent safe-shutdown system. The choice of hardware and a software development system for the co-ordinating Global Controller is described. The deign of the safe shutdown system is detailed. A multi-mode software structure is defined. Chapter 4 discusses the principles of fault detection, and their application in cases of ‘direct redundancy’. The logic required for voting systems, using identical sensors, is extended to the case of sensors whose measurements can be related instantaneously, for example using kinetics. Suitable sets of sensors on the experimental vehicle are identified, and test results are presented. Chapter 5 shows how fault detection can be made more precise by using dynamic models, rather than instantaneous relationships, to relate sensor measurements. The techniques are applied by dividing the experimental vehicle conceptually into subsystems. Identification of more subtle faults, including loss of suspension stiffness, is demonstrated.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available