Journal ArticleDOI
Performance surfaces of minimum effort estimators and controllers
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TLDR
Eigenvalue spreads of the cost functions of minimum weight vector norm and minimum output variance algorithms are examined for both estimation and feedforward control applications and support the widespread practical use of the "leaky LMS" algorithm.Abstract:
The performance surfaces of two classes of minimum effort adaptive filter are studied. Eigenvalue spreads of the cost functions of minimum weight vector norm and minimum output variance algorithms are examined for both estimation and feedforward control applications. Results support the widespread practical use of the "leaky LMS" algorithm. >read more
Citations
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Journal ArticleDOI
On the LMS algorithm with constant and variable leakage factor in a nonlinear environment
Orlando J. Tobias,Rui Seara +1 more
TL;DR: This paper studies the application of the linear least-mean-square (LMS) algorithm with leakage to a system having a memoryless saturation-type nonlinearity and proposes a strategy for a variable leakage.
Journal ArticleDOI
An active noise control algorithm with gain and power constraints on the adaptive filter
TL;DR: A new adaptive filter algorithm is developed that uses a penalty function formulation to place multiple constraints on the filter directly in the frequency domain, and performs better than existing ones in terms of improved convergence rate and frequency-selective limiting.
Journal ArticleDOI
Real-time feedback control of flow-induced cavity tones—Part 2: Adaptive control
TL;DR: In this article, an adaptive generalized predictive control (GPC) algorithm was formulated and applied to the cavity flow-tone problem, which employs gradient descent to update the GPC coefficients at each time step.
Journal ArticleDOI
Robustness of the Filtered-X LMS Algorithm— Part II: Robustness Enhancement by Minimal Regularization for Norm Bounded Uncertainty
TL;DR: The relationship between the regularization methods proposed in the literature to increase the robustness of the filtered-X LMS (FXLMS) algorithm and the existing methods are shown to be special cases of a more general robust FXLMS algorithm in which particular filters determine the type of regularization.
Proceedings ArticleDOI
Real-Time Adaptive Control of Flow-Induced Cavity Tones (Invited)
TL;DR: In this article, an adaptive generalized predictive control (GPC) algorithm was formulated and applied to the cavity flow-tone problem, which employed gradient descent to update the GPC coefficients at each time step.
References
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Book
Adaptive Signal Processing
Bernard Widrow,Samuel D. Stearns +1 more
TL;DR: This chapter discusses Adaptive Arrays and Adaptive Beamforming, as well as other Adaptive Algorithms and Structures, and discusses the Z-Transform in Adaptive Signal Processing.
Journal ArticleDOI
In-flight experiments on the active control of propeller-induced cabin noise
TL;DR: In this paper, a series of in-flight experiments on the active contrl of propeller-induced passenger cabin noise in a B.Ae. 748 aircraft were presented. But the results were limited to the first three harmonics of the blade passage frequency.
Journal ArticleDOI
The behavior of a multiple channel active control system
TL;DR: The convergence behavior of an adaptive feedforward active control system is studied and it is shown that some modes not only converge slowly but also require an excessive control effort for complete convergence.
Journal ArticleDOI
Equivalent transfer functions of minimum output variance mean-square estimators
P. Darlington,G. Xu +1 more
TL;DR: It is shown that equivalent transfer functions can be derived for both a conventional minimum variance system and for an estimator whose controlling algorithm attempts to minimize the norm square of the filter's weight vector, this latter system being exactly equivalent to the leaky LMS (least mean squares) algorithm.