منابع مشابه
Generalized Persistency of Excitation
The paper presents the generalized persistency of excitation conditions. They are not only valid for much broader range of applications than their classical counterparts but also elegantly prove the validity of the latter. The novelty and the significance of the approach presented in this publication is due to employing the time averaging technique.
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Abslmct-In an overparametrized model reference adaptive control & r ) = dt)r(') system, the measured signal n(t) cannot he persistently exciting (PE) I + rT(r )r ( t ) for any hounded reference input r ( t ) . The controller parameter vector for model-plant transfer function matching lies in a linear variety in the where = y ( t ) ~ y , , 3 ( t ) p ( t ) { ( t ) ~ , ( ~ ) p ( r ) ~ ( r l ,...
متن کاملImpulsive Adaptive Observers: Improving Persistency of Excitation
The development of adaptive observer techniques for nonlinear systems in the output canonical form is proposed applying additional impulsive feedbacks in the observer equations. The stability of new impulsive adaptive observers is investigated. It is shown that under some conditions the proposed impulsive feedbacks can improve the rate of the observer convergence or relax the requirement on per...
متن کاملAdaptive systems, lack of persistency of excitation and bursting phenomena
The paper considers four algorithms arising in the parameters correctly, but can exhibit a bursting adaptive systems problems, equation error identification, output phenomenon, lts output can, as a result of noise, error identification, reference trajectory following and adaptive ole oositionine Theoretical exn~anation hacked hv nonlinearities, round-off errors and so on, exhibit . . ~~~~~~~~ ~...
متن کاملModel reference composite learning control without persistency of excitation
Parameter convergence is desirable in adaptive control as it brings several attractive features, including accurate online modelling, exponential tracking, and robust adaptation without parameter drift. However, a strong persistent-excitation (PE) condition must be satisfied to guarantee parameter convergence in the conventional adaptive control. This study proposes a model reference composite ...
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ژورنال
عنوان ژورنال: International Journal of Mathematics and Mathematical Sciences
سال: 2007
ISSN: 0161-1712,1687-0425
DOI: 10.1155/2007/69093