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recursive Subspace Identification of Continuous-Time Systems Using Generalized Poisson Moment Functionals

CIRCUITS SYSTEMS AND SIGNAL PROCESSING 2022年第4期41卷 1848-1868页

作者： Yu, Miao Liu, Jianchang Guo, Ge Zhang, Wenle Northeastern Univ Sch Control Engn Qinhuangdao Hebei Peoples R China Northeastern Univ Coll Informat Sci & Engn Shenyang Peoples R China Northeastern Univ State Key Lab Synthet Automat Proc Ind Shenyang Peoples R China Ocean Univ China Coll Engn Qingdao Peoples R China

A method for recursive subspace identification of continuous-time systems based on generalized Poisson moment functionals is proposed. Most of the existing subspace identification methods have concentrated mainly on the time-invariant discrete-time systems. The results of subspace identification methods are confined to the discrete-time cases, due to the difference on the construction of Hankel matrices. In addition, the time-invariant identification algorithms are not suitable for online identification cases. In order to solve the problems above, the time derivatives of Hankel matrices can be evaluated by generalized Poisson moment functionals, which provides a simple linear mapping for identification algorithm without the amplification of stochastic noises. The size of the data matrices is fixed a priori to fade the influence of old data to the updated data, which is a key to reduce computational burden and storage cost of recursive algorithms. The efficiency of the presented method is provided by comparing simulation results.

关键词： Subspace identification recursive algorithm Generalized Poisson moment functionals Continuous-time systems

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recursive Computation of Static Output Feedback Stochastic Nash Games for Weakly-Coupled Large-Scale Systems

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IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES 2008年第10期E91A卷 3022-3029页

作者： Sagara, Muneomi Mukaidani, Hiroaki Yamamoto, Toru Hiroshima Univ Grad Sch Educ Higashihiroshima 7398524 Japan

This paper discusses the infinite horizon static output feedback stochastic Nash games involving state-dependent noise in weakly coupled large-scale systems. In order to construct the strategy. the conditions for the existence of equilibria have been derived front the solutions of the sets of cross-coupled stochastic algebraic Riccati equations (CSAREs). After establishing the asymptotic structure along with the positive semidefiniteness for the solutions of CSAREs, recursive algorithm for solving CSAREs is derived. As a result, it is shown that the proposed algorithm attains the reduced-order computations and the reduction of the CPU time. As another important contribution. the uniqueness of the strategy set is proved tor the sufficiently small parameter epsilon. Finally. in order to demonstrate the efficiency of the proposed algorithm, numerical example is given.

关键词： stochastic Nash games state-dependent noise static output feedback recursive algorithm

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Real-Time Communication Control in Decentralized Autonomous Sensor Networks

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JOURNAL OF AEROSPACE INFORMATION SYSTEMS 2022年第6期19卷 394-405页

作者： Wei, Hongchuan LeGrand, Keith A. Paradise, Andre A. Ferrari, Silvia Cornell Univ Ithaca NY 14850 USA

Minimizing the amount of communication required by a sensor network is crucial to minimizing both energy and time consumption, as well to operating covertly and robustly in communication-contested environments. This paper presents a novel intermittent communication control approach applicable to sensor networks deployed to sense and model spatio-temporal processes by nonparametric models such as Gaussian processes (GPs). The approach relies on a novel and efficient approximation of the GP average generalization error (AGE), as well as on novel GP sensor control and regression methods presented in this paper. This novel AGE approximation allows each sensor to characterize the nominal prediction performance of the learned GP model in the absence of communications. As a result, individual sensors can update the GP hyperparameters based solely on local measurements and decide to communicate only if and when their estimate of the nominal prediction performance falls below an acceptable threshold.

关键词： Environment Sensors Probability Distribution recursive algorithm Hyperparameter Optimization Proportional Integral Derivative Conjugate Gradient Method Communication Channels Numerical Simulation Energy Conservation Infrared Radiation

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A recursive Method for Vector Generation in Non-increasing Order of Its Likelihood for All Binary Vectors and Its Application for Linear Block Code Decodings

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IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES 2012年第4期E95A卷 801-810页

作者： Kusaka, Takuya Yokoyama, Ryuhei Fujiwara, Toru Okayama Univ Grad Sch Nat Sci & Technol Okayama 7008530 Japan Osaka Univ Grad Sch Informat Sci & Technol Suita Osaka 5650871 Japan

A recursive and efficient method for generating binary vectors in non-increasing order of their likelihood for a set of all binary vectors is proposed. Numerical results on experiments show the effectiveness of this m... 详细信息

关键词： binary vector recursive algorithm MLD soft-decision enumeration

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Adaptive finite-control-set model predictive current control for IPMSM drives with inductance variation

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IET ELECTRIC POWER APPLICATIONS 2017年第5期11卷 874-884页

作者： Chen, Zhuoyi Qiu, Jianqi Jin, Mengjia Zhejiang Univ Dept Elect Engn Hangzhou Zhejiang Peoples R China

Finite-control-set model predictive control (FCS-MPC) has many advantages in electric drive control systems but needs the accurate knowledge of the system parameters. The performance of the FCS-MPC will be deteriorated under parameter mismatches. This study proposes an adaptive FCS-MPC current control method for interior permanent magnet synchronous machine (IPMSM) drives subject to the inductance variations. The inductances are identified online by an adaptive observer with a recursive algorithm, which is inherently incorporated into the FCS-MPC control process to reduce the additional computational cost. Compensation methods are also proposed to improve the identification accuracy. The simulation and experimental results validate that, the IPMSM current control performance, speed-extension capability and drive efficiency are all improved by the proposed method.

关键词： predictive control electric current control adaptive control synchronous machines electric drives inductance observers machine control permanent magnet machines compensation adaptive finite-control-set model predictive current control inductance variation electric drive control systems adaptive FCS-MPC current control interior permanent magnet synchronous machine drives adaptive observer recursive algorithm compensation method identification accuracy IPMSM current control performance FCS-MPC performance speed-extension capability IPMSM drive efficiency

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A lower bound for the detection/isolation delay in a class of sequential tests

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IEEE TRANSACTIONS ON INFORMATION THEORY 2003年第11期49卷 3037-3047页

作者： Nikiforov, IV Univ Technol Troyes LM2S F-10010 Troyes France

We address the problem of minimax detecting and isolating abrupt changes in random signals. The criterion of optimality consists in minimizing the maximum mean detection/isolation delay for a given maximum probability of false isolation and mean time before a false alarm. It seems that such a criterion has many practical applications especially for safety-critical applications, in monitoring dangerous industrial processes and also when the decision should be done in a hostile environment. The redundant strapdown inertial reference unit integrity monitoring problem is discussed. An asymptotic lower bound for the mean detection/isolation delay is given.

关键词： asymptotic optimality lower bound minimax change detection/isolation navigation system integrity monitoring recursive algorithm

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Conical diffraction by multilayer gratings: a recursive integral equation approach

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APPLICATIONS OF MATHEMATICS 2013年第3期58卷 279-307页

作者： Schmidt, Gunther Weierstr Inst Appl Math & Stochast D-10117 Berlin Germany

The paper is devoted to an integral equation algorithm for studying the scattering of plane waves by multilayer diffraction gratings under oblique incidence. The scattering problem is described by a system of Helmholtz equations with piecewise constant coefficients in a"e(2) coupled by special transmission conditions at the interfaces between different layers. Boundary integral methods lead to a system of singular integral equations, containing at least two equations for each interface. To deal with an arbitrary number of material layers we present the extension of a recursive procedure developed by Maystre for normal incidence, which transforms the problem to a sequence of equations with 2x2 operator matrices on each interface. Necessary and sufficient conditions for the applicability of the algorithm are derived.

关键词： diffraction periodic structure multilayer grating singular integral formulation recursive algorithm

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Decomposition strategy-based hierarchical least mean square algorithm for control systems from the impulse responses

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INTERNATIONAL JOURNAL OF SYSTEMS SCIENCE 2021年第9期52卷 1806-1821页

作者： Xu, Ling Ding, Feng Zhu, Quanmin Wuxi Vocat Inst Commerce Sch Internet Things Technol Wuxi 214153 Jiangsu Peoples R China Jiangnan Univ Sch Internet Things Engn Wuxi 214122 Jiangsu Peoples R China Univ West England Dept Engn Design & Math Bristol Avon England

In this research, the issue of parameter estimation for control systems is considered to develop a highly efficient estimation approach for the purpose of satisfying the need of industrial process modelling. For dynamical production processes, an error objective function in accordance with the dynamically sampled data is constructed for on-line identification. In order to simulate the instantaneous response of dynamical processes, the experimental scheme of impulse responses is adopted, and the observational data of impulse responses are used as the identification experimental data. In order to acquire high accuracy and stable performance, a hierarchical least mean square method is designed by means of the decomposition technique and the hierarchical principle. Finally, the superiority of the hierarchical least mean square approach is verified by the comparison simulation experiment and the effectiveness of the hierarchical least mean square method is proved by the detailed numerical examples.

关键词： Control system hierarchical identification parameter estimation least mean square recursive algorithm

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Wavelets: A new tool for the resonant grounded power distribution systems relaying

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IEEE TRANSACTIONS ON POWER DELIVERY 1996年第3期11卷 1301-1308页

作者： Chaari, O Meunier, M Brouaye, F SUPELEC SIGNAUX & SYST LABGIF SUR YVETTEFRANCE

This paper introduces wavelets and shows that they may be efficient and useful for the power distribution relaying. The wavelet transform of a signal consists in measuring the ''similarity'' between the signal and a set of translated and scaled versions of ''mother wavelet''. The ''mother wavelet'' is a chosen fast decaying oscillation function. Wavelets are used to analyse transient earth fault signals in a 20 kV resonant grounded network as generated by EMTP. It is shown that wavelets may be employed for analysing records to study efficiently the faulted network. Moreover, this new technique can actually be implemented in real time for protection devices. Thus, it is suitable for application to protective relays.

关键词： resonant grounded system power distribution system Earth fault transients wavelets recursive algorithm signal analysis

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A two-dimensional matrix Pade-type approximation in the inner product space

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JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS 2009年第2期231卷 680-695页

作者： Tao, Youtian Gu, Chuanqing Shanghai Univ Dept Math Shanghai 200444 Peoples R China Chaohu Coll Dept Math Chaohu 238000 Peoples R China

By introducing a bivariate matrix-valued linear functional on the scalar polynomial space. a general two-dimensional (2-D) matrix Pade-type approximant (BMPTA) in the inner product space is defined in this paper. The coefficients of its denominator polynomials are determined by taking the direct inner product of matrices. The remainder formula is developed and an algorithm for the numerator polynomials is presented when the generating polynomials are given in advance. By means of the Hankel-like coefficient matrix, a determinantal expression of BMPTA is presented. Moreover, to avoid the computation of the determinants, two efficient recursive algorithms are proposed. At the end the method of BMPTA is applied to partial realization problems of 2-D linear systems. (C) 2009 Elsevier B.V. All rights reserved.

关键词： Multivariate matrix-valued Pade-type approximants Linear functional recursive algorithm Determinantal expression Realization problem 2-D linear systems

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