Title :
A Practical Design Procedure Incorporating the Discrete-Time Direct Nyquist Array Method
Author :
de Wolf, S. ; van der Weiden, A.J.J. ; van Zee, G.A.
Author_Institution :
Department of Mechanical Engineering, Delft University of Technology, Mekelweg 2, 2628 CD Delft, The Netherlands
Abstract :
As Rosenbrock´s direct Nyquist array (DNA) method was originally only formulated for continuous-time systems, transformations are required to handle the majority of modern control problems, which are inherently discrete-time. Transformation, however, is cumbersome, and may affect the actual performance of the final design. To circumvent this difficulty, a discrete-time version (DDNA) of the DNA method has been developed and incorporated in a computer package. This package contains an algorithm for designing dynamic discrete-time compensators with the aid of a constrained-function-minimization method. Application to an industrial centrifugal compressor system has confirmed the validity of the method and the efficiency of the algorithm used.
Keywords :
Algorithm design and analysis; Control systems; DNA; Digital control; Discrete transforms; Frequency domain analysis; Mechanical engineering; Packaging; Sampling methods; Transfer functions; Compressor Control; Direct Nyquist Array; Discrete-time; Dynamic Compensator;
Conference_Titel :
American Control Conference, 1987
Conference_Location :
Minneapolis, MN, USA
