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New method for approximating time-delay systems with delay-free systems

New method for approximating time-delay systems with delay-free systems

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A transfer function including a not too ‘large’ time delay is approximated with a transfer function characterised by only one stable, multiple pole. The approach is based on the Laguerre orthogonal function expansion of the impulse responses, corresponding to the given transfer function and the approximating one. The approach requires very limited computational effort to achieve a good approximation.


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