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Model reduction for discrete time systems

Model reduction for discrete time systems

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A modified approach for reducing the order of discrete time systems is presented. The objective of the reduction process is to preserve specific design parameters of the transfer function such as phase margin, gain margin, and bandwidth. This approach is attractive because it can be easily implemented and does not involve any complex algebra.

References

    1. 1)
      • J.M. Lin , K.S. Han . Model reduction for keeping gain margin and phase margin unchanged. IEEE Trans. , 51 - 56
    2. 2)
      • Unnikrishnan, R., Gupta, A.: `Reduced order models for discrete time systems using remainder matching method', IECON'89, 15th Annual Conf. IEEE Industrial Electronics Society, 1989, 2 of 4, p. 383–388.
    3. 3)
      • C. Hwang , Y.C. Lee . Multifrequency Pade approximation via Jordan continued fraction expansion. IEEE Trans. Autom. Control , 4 , 444 - 446
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