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Design and analysis of non-uniform rate digital controllers

Khan, M.S., Dixon, R. and Goodall, Roger M. (2010) Design and analysis of non-uniform rate digital controllers. In: UKACC International Conference on Control 2010, 7th - 10th September 2010, Coventry, UK.

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Abstract

Various applications in digital systems require the involvement of concepts from signal processing and filtering. These specific problems often need the linear dynamic systems to have a transfer function that can specify the behavioural characteristics of the system. When operating in the digital domain, such functions can effectively be used to approximate the same characteristics over the frequency range of importance as any given continuous-time transfer function. In the case with uniform sampling, linear systems theory can directly provide an answer to determine the frequency response. However, when the element of randomness is added to the sample rate of the discrete controller, the common analysis technique of substituting z=ejw will not give the correct result. This paper therefore places an emphasis on the Fourier analysis and highlights a technique to compute the magnitude and phase of a non-uniform rate transfer function at various frequencies in the time domain.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Subjects: T Technology > TF Railroad engineering and operation
Schools: School of Computing and Engineering
School of Computing and Engineering > Institute of Railway Research
Depositing User: Cherry Edmunds
Date Deposited: 02 Jul 2013 15:23
Last Modified: 02 Jul 2013 15:23
URI: http://eprints.hud.ac.uk/id/eprint/17876

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