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35th Youth Academic Annual Conference of Chinese-Association-of-Automation (YAC)

作者： Huang, Haoen Fu, Dongyang Xiao, Xiuchun Jin, Long Jiang, Chengze Wang, Huan Guangdong Ocean Univ Coll Elect & Informat Engn Zhanjiang Peoples R China Guangdong Ocean Univ Shenzhen Inst Shenzhen Peoples R China

ISBN: (纸本)9781728176840

In this paper, the major work is to investigate how the effect of step-size on the convergence performance of the newton-raphson iterative algorithm for solving multi-linear systems with M-tensors. Via utilizing the discrete-time Lyapunov theory, it is revealed that the range of the step-size is between 0 and 2. Only in this way can ensure the convergence of newton-raphson iterative algorithm. Additionally, when gamma = 1, that is, the traditional newton-raphson iterative algorithm possessing the fastest convergence speed for solving multi-linear systems with M-tensors. Simultaneously, the corresponding numerical examples about the multi-linear systems with M-tensors with 3-order 10-dimensional synthesized by the variable step-size newton-raphson iterative algorithm are performed, whose results substantiate and support above the mentioned conclusions.

关键词： Multi-linear systems M-tensors variable stepsize newton-raphson iterative algorithm

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A Projection Transformation Method for Eliminating Crosstalk in Networked Thermopile Arrays

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IEEE SENSORS JOURNAL 2022年第4期22卷 3263-3269页

作者： Feng, Wanjin Fu, Jianyu Hou, Ying Liu, Chao Huang, Peng Chen, Dapeng Chinese Acad Sci Inst Microelect Key Lab Microelect Device & Integrated Technol Beijing 100029 Peoples R China Univ Chinese Acad Sci Sch Microelect Beijing 100049 Peoples R China Wuxi IoT Innovat Ctr Co Ltd Wuxi 214135 Jiangsu Peoples R China

The networked thermopile array in row-column fashion suffered from the crosstalk caused by parasitic parallel paths. To measure accurate two-dimensional thermal information, it is of great importance to eliminate the crosstalk. In this work, based on the response voltage non-linearity of thermopile pixels as well as the response voltage non-uniformity of array, a projection transformation method that suits for small-scale networked thermopile arrays is proposed. It transforms the crosstalk elimination problem into an overdetermined non-linear least squares problem, and is solved by the newton-raphson iterative algorithm. Its reconstruction error is analyzed carefully by Monte Carlo simulation, and its ability to implement non-uniformity and defective pixel correction is also discussed. Its validity is verified experimentally using a3x3 networked thermopile array. The experimental result shows that the original IR image can be reconstructed from measured IR images by this method, and the reconstruction error is significantly decreased from 17.03% to 2.10%.

关键词： Sensors Voltage Crosstalk Sensor arrays Voltage measurement Resistance newton method Crosstalk elimination projection transformation networked thermopile arrays newton-raphson iterative algorithm non-linear least squares

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Axisymmetric nonlinear behavior of functionally graded saturated poroelastic circular plates under thermo-mechanical loading

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PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE 2022年第8期236卷 4313-4335页

作者： Panah, Manouchehr Khorshidvand, A. R. Khorsandijou, S. M. Jabbari, Mohsen Islamic Azad Univ Dept Mech Engn South Tehran Branch 173 Iranshahr St Tehran 0098 Iran

In functionally graded saturated poroelastic circular plates with immovable simply supported and clamped rims, the axisymmetric nonlinear bending under transverse thermo-mechanical loading has been parametrically studied and compared with the axisymmetric postbuckling and nonlinear bending under thermal loading. Based on the classical plate theory, Love-Kirchhoff hypotheses and Sander's assumptions, the general coupled nonlinear radial and transverse equilibrium equations, central continuity, symmetry and boundary conditions has been derived in ordinary and state-spatial forms. The corresponding difference equations have been achieved by using the generalized differential quadrature method. The equations have been assembled and numerically solved by using the newton-raphson iterative algorithm. The effects of the mechanical and thermal loads, pore distribution type, porosity parameter, Skempton's coefficient, and thickness and boundary condition type on the behavior of the deflection, whether caused by thermo-mechanical bending, thermal postbuckling, or thermal bending, have been investigated in detail. From the parametric study, a novel quantity determining bending behavior has been found. The axisymmetric themo-mechanical nonlinear bending deflection is inversely and nonlinearly proportional to thermal load when the quantity is greater than a critical value and is nonlinearly proportional to thermal load when the quantity is less than a critical value. It was verified that the plate behavior complies with the general rules known for FG saturated poroelastic circular plates and with those known for metal-ceramic functionally graded circular plates whose governing equations are mathematically analogous to those of the current research.

关键词： Axisymmetric thermo-mechanical nonlinear bending axisymmetric thermal postbuckling functionally graded saturated poroelastic circular plate ordinary and state-spatial forms of equilibrium equations generalized differential quadrature method newton-raphson iterative algorithm

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DESIGN OF DECENTRALIZED LOAD-FREQUENCY REGULATORS FOR INTERCONNECTED POWER-SYSTEMS

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IEE PROCEEDINGS-C GENERATION TRANSMISSION AND DISTRIBUTION 1982年第1期129卷 17-23页

作者： HIYAMA, T Department of Electrical Engineering Kumamoto University Kumamoto Japan

The paper presents a new method of designing decentralised load-frequency regulators for interconnected power systems. Within the framework of this method, the interconnected mutliarea power system is decomposed into several subsystems, each of which is controlled separately by a decentralised regulator. Each subsystem consists of one area and its external equivalent in a simplified form. A decentralised control law for the study area is introduced by using a quadratic performance index. Feedback gains of the decentralised regulator, which minimise the index, are determined by a newton-raphson iterative algorithm. The proposed method is applied to an interconnected longitudinal 4-area system, and the effects of the proposed regulator are examined by digital simulations and associated sensitivity analysis of the system. Furthermore, a suitable means for preventing excessive control action is also considered involving a significant system nonlinearity, i.e. some generation rate constraint.

关键词： Frequency control newton-raphson iterative algorithm preventing excessive control action power system interconnection digital simulations system nonlinearity interconnected power systems feedback regulator design quadratic performance index Control of electric power systems Power and energy control performance index control system synthesis sensitivity analysis control nonlinearities load regulation Power system management, operation and economics power system control iterative methods controllers Controllers frequency control Control system analysis and synthesis methods decentralised load-frequency regulators

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OPTIMIZATION OF DISCRETE-TYPE LOAD-FREQUENCY REGULATORS CONSIDERING GENERATION-RATE CONSTRAINTS

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IEE PROCEEDINGS-C GENERATION TRANSMISSION AND DISTRIBUTION 1982年第6期129卷 285-289页

作者： HIYAMA, T Department of Electrical Engineering Kumamoto University Kumamoto Japan

In the paper a method of designing discrete-type load-frequency regulators of a two-area reheat-type thermal system with generation-rate constraints is presented. The construction of the regulators is based on the conventional tie-line bias control. The regulator parameters are optimised by minimisirig a discrete-type quadratic performance index with a term for presenting a generation-rate constraint. The optimisation of the parameters is achieved by using a newton-raphson iterative algorithm. The control effects by the proposed regulators are examined by digital simulations of the system. Furthermore, a suitable means for preventing excessive and unnecessary control action is also proposed considering the constraint.

关键词： newton-raphson iterative algorithm minimisation minimising voltage control Power engineering computing steam power stations digital simulations parameters are optimised two-area reheat-type thermal system Voltage control quadratic performance index Control of electric power systems discrete systems discrete-type load-frequency regulators load regulation Power system management, operation and economics Control of heat systems Discrete control systems Control engineering computing iterative methods controllers tie-line bias control Controllers Steam power stations and plants power station load digital simulation power stations generation-rate constraints

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