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On the nature of the Boxer-Thaler and Madwed integrators and their applications in digitizing a continuous-time system

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3 Author(s)
Chi-Hsu Wang ; Dept. of Electr. Eng., Nat. Taiwan Inst. of Technol., Taipei, Taiwan ; Mon-Yih Lin ; Ching-Cheng Teng

The nature of the Boxer-Thaler and Madwed integrators is explored. A consistent derivation of the Madwed integrator from the well-known derivation of the Boxer-Thaler integrator is proposed. A new general computerized algorithm is also proposed for the kth-order Boxer-Thaler and Madwed integrators. These two discrete integrators are used to replace the Tustin integrator for digitizing a continuous-time system. A more systematic and precise formulation of the Q-matrix is presented for the s-domain to z-domain transformation via Boxer-Thaler and Madwed integrators. Due to the more accurate nature of these two discrete integrators, better results can be obtained. A set of MATLAB programs is written to implement the proposed algorithms

Published in:

Automatic Control, IEEE Transactions on  (Volume:35 ,  Issue: 10 )