| 摘要 |
PROBLEM TO BE SOLVED: To provide a design apparatus of a robust digital controller having high degree of approximation and eliminating the need for taking into consideration the magnitude of the control input. SOLUTION: A control correcting means 70A determines a model transfer function W<SB>m</SB>(z) as a better-approximated second-order approximation of a discrete transfer function W<SB>ry</SB>(z) between the target value r and the control quantity y, and is constructed as an integral-mode control system for calculating and processing within a digital controller, based on the model transfer function W<SB>m</SB>(z). The design apparatus automatically calculates the parameter here. The degree of approximation is improved, and the digital controller 70 is achieved so as to have a resistance to output noise, in comparison with an approximate digital control system for achieving a conventional first-order approximation model. COPYRIGHT: (C)2006,JPO&NCIPI
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