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23-11-2020 | Computer Aided Engineering | Issue 1/2021

Production Engineering 1/2021

Tangential interpolatory projections for a class of second-order index-1 descriptor systems and application to Mechatronics

Journal:
Production Engineering > Issue 1/2021
Authors:
Md. Motlubar Rahman, M. Monir Uddin, L. S. Andallah, Mahtab Uddin

Abstract

This paper studies the model order reduction of second-order index-1 descriptor systems using a tangential interpolation projection method based on the Iterative Rational Krylov Algorithm (IRKA). Our primary focus is to reduce the system into a second-order form so that the structure of the original system can be preserved. For this purpose, the IRKA based tangential interpolatory method is modified to deal with the second-order structure of the underlying descriptor system efficiently in an implicit way. The paper also shows that by exploiting the symmetric properties of the system the implementing computational costs can be reduced significantly. Theoretical results are verified for the model reduction of the piezo actuator based adaptive spindle support which is second-order index-1 differential-algebraic form. The efficiency and accuracy of the method are demonstrated by analyzing the numerical results.

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