MultiRate discrete time model reference adaptive control

T. Suzuki, T. Yamashita, Kanya Tanaka

Research output: Contribution to journalConference article


This paper presents a multirate scheme for discrete-time model reference adaptive control (MRAC) in which the controller parameters are updated at an integer multiple of the control period. This scheme enables us to implement a discrete-time MRAC system for any minimum phase continuous-time plant, employing a sophisticated adaptive law with fast convergence. In this scheme the MRAC system is designed based on an approximate discrete-time model of the plant expressed in terms of the delta operator and thus the robustness of the resulting system to the model error should be discussed. It is proved that the proposed scheme allows the MRAC system to behave robustly to the model error if the regressor signal is persistently exciting and the control period is chosen sufficiently small. The usefulness of the scheme is demonstrated by the computer simulations carried out for a second order example system.

Original languageEnglish
Pages (from-to)217-222
Number of pages6
JournalNational Conference Publication - Institution of Engineers, Australia
Issue number88-15
Publication statusPublished - 1 Dec 1988
Event1988 IFAC Workshop on Robust Adaptive Control - Newcastle, Aust
Duration: 22 Aug 198824 Aug 1988


Cite this