نتایج جستجو برای: adaptive design parameters

تعداد نتایج: 1638101  

2010
J. Wang Z. Qu

Abstract: A robust adaptive control is presented for a class of time-varying nonlinear uncertain systems which have a fractional nonlinearly parameterised structure. The proposed design is based on robust adaptive backstepping and neural network approximation. The unknown time-varying parameters in the fractional nonlinear functions are estimated using a smooth projection algorithm and estimati...

2005
Alexander Fradkov Dimitri Peaucelle Boris Andrievsky

Robust adaptive strict G-passification is considered for linear time-invariant systems with norm-bounded uncertainty. First, parameter-dependent static outputfeedback and robust static output-feedback are proved to be equivalent if hyper minimum phase properties are fulfilled. Linear matrix inequality based conditions are formulated for proving these properties for all uncertain parameters. The...

2014
Sundarapandian Vaidyanathan Kavitha Madhavan

First, this paper introduces a seven-term novel 3-D chaotic system and discusses its qualitative properties. The proposed system is a seven-term novel polynomial chaotic system with three quadratic nonlinearities. The Lyapunov exponents of the novel chaotic system are obtained as L1 = 3.3226, L2 = 0 and L3 = –30.3406. The maximal Lyapunov exponent (MLE) for the novel chaotic system is obtained ...

Journal: :Concurrency and Computation: Practice and Experience 2013
Pablo de Oliveira Castro Eric Petit Asma Farjallah William Jalby

Characterizing performance is essential to optimize programs and architectures. The open source Adaptive Sampling Kit (ASK) measures the performance trade-off in large design spaces. Exhaustively sampling all sets of parameters is computationally intractable. Therefore, ASK concentrates exploration in the most irregular regions of the design space through multiple adaptive sampling strategies. ...

Journal: :Automatica 2014
Halil I. Basturk Miroslav Krstic

Solutions exist for the problem of canceling sinusoidal disturbances by the measurement of the state or by the measurement of an output for linear and nonlinear systems. In this paper, an adaptive backstepping controller is designed to cancel sinusoidal disturbances forcing an unknown linear time-invariant system in controllable canonical form which is augmented by a linear input subsystem with...

Journal: :bulletin of the iranian mathematical society 2013
a. parvardeh b. panahbehagh m. salehi j. brown d. smith

‎we extend the method of adaptive two-stage sequential sampling to‎‎include designs where there is more than one criteria is used in‎‎deciding on the allocation of additional sampling effort‎. ‎these‎‎criteria‎, ‎or conditions‎, ‎can be a measure of the target‎‎population‎, ‎or a measure of some related population‎. ‎we develop‎‎murthy estimator for the design that is unbiased estimators for‎‎t...

2012
Yonghong Zhu Qing Feng Jianhong Wang

A neural network--based adaptive passive output feedback control problem is studied for a class of multi-input multi-output nonlinear systems with unknown nonlinearities and unknown parameters. Neural networks are used to identify unknown nonlinearities, and the update laws of weight parameters and constant parameters are proposed. The design methods of the adaptive passive controllers for this...

2003
H. EL FADIL F. GIRI M. HALOUA H. OUADI

~~ This paper focuses on the problem of controlling DC-to-DC switched power converters of Buck type. The system nonlinear feature is coped with by resorting to the backstepping control approach. Both adaptive and nonadaptive versions are designed and shown to yield quite interesting tracking and robustness performances. A comparison study shows that backstepping nonlinear controllers perform as...

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