检索结果-内蒙古大学图书馆

IEEE OPEN JOURNAL OF CONTROL systems 2025年 4卷 18-29页

作者： Kang, Xile Ishii, Hideaki Tokyo Inst Technol Dept Comp Sci Tokyo 2268501 Japan Univ Tokyo Dept Phys Informat & Comp Tokyo 1138656 Japan

This paper focuses on cyber-security issues of networked control systems in closed-loop forms from the perspective of quantized sampled-data systems. Quantization of control inputs adds quantization error to the plant input, resulting in certain variation in the plant output. On the other hand, sampling can introduce non-minimum phase zeros in discretized systems. We consider zero-dynamics attacks, which is a class of false data injection attacks utilizing such unstable zeros. Although non-quantized zero-dynamics attacks are undetectable from the plant output side, quantized attacks may be revealed by larger output variation. Our setting is that the attack signal is applied with the same uniform quantizer used for the control input. We evaluate the attack stealthiness in the closed-loop system setting by quantifying the output variation. Specifically, we characterize the cases for static and dynamic quantization in the attack signal, while keeping the control input statically quantized. Then we demonstrate that the attacker can reduce such output variation with a modified approach, by compensating the quantization error of the attack signal inside the attack dynamics. We provide numerical examples to illustrate the effectiveness of the proposed approaches. We show that observing the quantized control input value by a mirroring model can reveal the zero-dynamics attacks.

关键词： Quantization (signal) Control systems Networked control systems sampled data systems Linear systems Internet of Things Uncertainty Process control Power system dynamics Numerical models Cyber-physical systems cyberattacks sampled-data systems

来源：评论

学校读者我要写书评

暂无评论

REACHABILITY OF sampled data systems WITH INPUT AND OUTPUT DELAYS

引用

AUTOMATICA 1990年第2期26卷 425-428页

作者： DIDUCH, CP DORAISWAMI, R Department of Electrical Engineering University of New Brunswick Fredericton NB E3B 5A3 P.O. Box 4400 Canada

Zero order hold discrete-time models of sampled data plants with multiple input and output delays are derived. The delay is not assumed to be an integral multiple of the sample period, nor is it assumed identical for all inputs or outputs. It is proven that the discrete model is reachable iff (i) the discrete model with zero integral delay is reachable, (ii) the number of plant inputs is greater than or equal to the number of outputs and (iii) there are no transmission zeros at the origin.

关键词： Control theory controllability delays sampled data systems

来源：评论

学校读者我要写书评

暂无评论

Singular perturbation analysis of cheap control problem for sampled data systems

引用

IEEE TRANSACTIONS ON AUTOMATIC CONTROL 1999年第11期44卷 2209-2214页

作者： Popescu, DC Gajic, Z Rutgers State Univ Dept Elect & Comp Engn Piscataway NJ 08854 USA

This paper studies the discrete-time cheap control problem for sampled data systems using the theory of singular perturbations. It is shown, by using the two time-scale property of singularly perturbed systems, that the problem can be solved in terms of two reduced-order subproblems for which computations can be done in parallel, thus increasing the computational speed. Similarly to the continuous-time case, the singular perturbation approach enables the decomposition of the algebraic Riccati equation into two reduced-order pure-slow and pure-fast continuous-time algebraic equations.

关键词： cheap control decoupling order reduction sampled data systems singular perturbations

来源：评论

学校读者我要写书评

暂无评论

Invertibility of sampled data systems

引用

IEEE TRANSACTIONS ON CIRCUITS AND systems I-FUNDAMENTAL THEORY AND APPLICATIONS 2000年第3期47卷 279-289页

作者： Bai, EW Ding, Z Univ Iowa Dept Elect & Comp Engn Iowa City IA 52242 USA

In this paper, we study the invertibility of a sampled data system. Necessary and sufficient invertibility conditions are given explicitly in terms of transfer function zeros. It is shown that many systems including those with "unstable" zeros or those with more inputs than outputs are in fact stably invertible. Detailed design procedures to achieve the system inverse are given. A minimum sensitivity Inverse with respect to under-modeling and noise is also provided in the paper.

关键词： inverse nonminimum phase sampled data systems

来源：评论

学校读者我要写书评

暂无评论

ADAPTIVE ESTIMATION OF TIME DELAYS IN sampled data systems

引用

IEEE TRANSACTIONS ON ACOUSTICS SPEECH AND SIGNAL PROCESSING 1981年第3期29卷 582-587页

作者： ETTER, DM STEARNS, SD SANDIA NATL LABS ALBUQUERQUENM 87185

An adaptive technique is developed which iteratively determines the time delay between two sampled signals that are highly correlated. Although the procedure does not require a priori information on the input signals, it does require that the signals have a unimodal or periodically unimodal cross-correlation function. The adaptive delay algorithm uses a gradient technique to find the value of the adaptive delay that minimizes the mean-squared (MS) error function. This iterative algorithm is similar to the adaptive filter coefficient algorithm developed by Widrow. However, the MS error function for the adaptive delay is not quadratic, as it is in the adaptive filter. A statistical analysis determines the value of the convergence parameter which effects rapid convergence of the adaptive delay. This convergence parameter is a function of the power of the input signal. Computer simulations are presented which verify that the adaptive delay correctly estimates the time delay difference between two sinusoids, including those in noisy environments. The adaptive delay is also shown to perform correctly in a time delay tracking application.

关键词： Adaptive estimation Delay effects sampled data systems Iterative algorithms Convergence Adaptive filters Delay estimation Adaptive systems Computer errors Statistical analysis

来源：评论

学校读者我要写书评

暂无评论

CONTROL OF ASYNCHRONOUS sampled-data systems

引用

IEEE TRANSACTIONS ON AUTOMATIC CONTROL 1994年第7期39卷 1451-1455页

作者： VOULGARIS, P Coordinated Science Laborator University of Illinois Urbana IL USA

This paper is concerned with the problem of controller design in the case of asynchronous sampled data systems. Optimal LQG controllers are obtained for the class of two-rate systems where all the control inputs are held at a rate which is asynchronously related to the rate with which all of the outputs are sampled. Furthermore for this class, a parameterization of all stabilizing controllers is provided.

关键词： Control systems sampled data systems Optimal control Sampling methods Clocks Dynamic programming Control design Robustness Design methodology Feedback control

来源：评论

学校读者我要写书评

暂无评论

Zeros of sampled data systems represented by FIR models

引用

AUTOMATICA 2000年第1期36卷 121-123页

作者： Bai, EW Ding, Z Univ Iowa Dept Elect & Comp Engn Iowa City IA 52242 USA Auburn Univ Dept Elect Engn Auburn AL 36839 USA

In this note, we investigate zero locations of FIR linear systems that are finite length approximations of sampled continuous-time systems. For linear systems with rational transfer functions, it is shown that with a relative degree higher than two and a short sampling interval, the resultant FIR sampled data system is always a nonminimum phase. (C) 1999 Elsevier Science Ltd. All rights reserved.

关键词： zeros FIR systems nonminimum phase systems sampled data systems

来源：评论

学校读者我要写书评

暂无评论

LIMIT-CYCLE PREDICTIONS IN sampled data systems

引用

IEE PROCEEDINGS-D CONTROL THEORY AND APPLICATIONS 1981年第5期128卷 219-222页

作者： CAMERON, R KOUVARITAKIS, B UNIV OXFORD DEPT ENGN SCIOXFORD OX1 3PJENGLAND

For sampled data systems, it is possible to express discrete time convolution in terms of appropriate matrix multiplication. A limiting process then yields the steady-state response to a periodic input. The matrix involved in this operation is a circulant matrix based on the impulse response of the system. Circulant matrices are known to have useful structural properties and permit the association of the frequency domain with the time domain. The use of circulants in the analysis of nonlinear systems provides the means for converting the unwieldy nonlinear equations of continuous systems to simple matrix multiplications. It is then possible to apply numerical range techniques and rederive the circle criterion. The direct application of this approach yields a criterion which is less conservative than that obtained by the simple application of the small-gains theorem. Use of the approach in conjunction with a loop transformation, on the other hand, provides an alternative derivation of the circle criterion for discrete systems. The method can be extended to multivariable systems, and, because of its association with the time domain, it permits the assessment of system stability in the face of imperfect system descriptions, namely truncated impulse responses.

关键词： Nonlinear control systems loop transformation sampled data systems limiting process matrix multiplication limit cycle predictions Algebra stability criteria continuous systems discrete time convolution periodic input impulse response matrix algebra numerical range techniques multivariable systems circle criterion discrete systems steady-state response time domain circulant matrix stability Discrete control systems frequency domain nonlinear systems limit cycles Stability in control theory

来源：评论

学校读者我要写书评

暂无评论

IDENTIFICATION OF LINEAR sampled data systems BY TRANSFORM TECHNIQUES

引用

IEEE TRANSACTIONS ON AUTOMATIC CONTROL 1969年第5期AC14卷 582-+页

作者： BUTCHER, WE COOK, GE Vanderbilt University Nashville TN USA

A technique for application of the popular fast Fourier transform (FFT) to the system identification problem is outlined. Smoothing is obtained inherently in the transform and additionally by redundancy in the data. An iterative technique is discussed for the case of nonzero initial conditions and to avoid problems due to the circular nature of convolutions computed by the discrete Fourier transform (DFT).

关键词： sampled data systems Transfer functions Discrete Fourier transforms Linear systems Automatic control Smoothing methods Random number generation Fast Fourier transforms Autocorrelation Polynomials

来源：评论

学校读者我要写书评

暂无评论

ON STOCHASTIC OPTIMAL CONTROL OF LINEAR sampled data systems

引用

PROCEEDINGS OF THE INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS 1965年第5期53卷 529-&页

作者： KIM, M DJADJURI, K Cornell University Ithaca N.Y.

First Page of the Article

关键词： Stochastic systems Optimal control sampled data systems Masers Optical amplifiers Optical filters Resonance Jacobian matrices Magnetic materials Optical resonators

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：