| Summary: | 碩士 === 大同工學院 === 機械工程學系 === 84 === Because of the slow parameter adaptation of the adaptive
control law, the poor transient response generally exists. The
main objective of this researchis to improve the transient
response of adaptive system. The method for improving transient
response is to make use of the multiple models, that is,
estimating system parameters by using multiple models, selecting
the model which estimates best according to appropriate
performance index, and then usingthe controller to control the
plant which corresponds to that identification model. By tis
way, the transient response of adaptive system is improved. Note
that the initial estimates of plant parameters are uniformly
distributed in thecompact set that plant parameters exist.
This research applies the "composite adaptation" concept which
extracts information about parameters from all sources that
contain it and uses a different adaptive law. We hope to obtain
better transient response of adaptivesystem by using a different
adaptation law. From the simulation results, it is known that
multiple models and switch iseffective to improve the poor
transient response of adaptive system and by using the composite
adaptation law, we obtain better transient response.
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