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New in Mathematica 9Enhanced Control Systems

Approximate a Time-Delay Model 

A TransferFunctionModel with an delay in the denominator has infinitely many poles. TransferFunctionPoles can be used to plot all the poles in a given region.

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Use SystemsModelDelayApproximate to obtain delay-free approximations of time-delay systems. As the order is increased, the approximations converge to the original model.

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