On the transient behaviour in discrete-time model reference adaptive control: Analysis and possible improvement

✍ Scribed by Aniruddha Datta

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 466 KB
• Volume: 30
• Category: Article
• ISSN: 0005-1098
• DOI: 10.1016/0005-1098(94)90131-7

✦ Synopsis

This paper shows that a result recently obtained for arbitrarily improving the zero-state transient performance of a continuous-time model reference adaptive control scheme, does not have a counterpart in discrete-time. Using standard l~ optimal control theory, it is shown that unlike the continuous-time case, it is not possible to modify the control law to obtain arbitrarily small l~ gain for the closed-loop transfer function from the parameter mismatch to the tracking error. Nevertheless, the control law may be modified to minimize this gain, perhaps resulting in improved error transients.