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reference model Sliding model Velocity Control for Linear Elevator Using Permanent Magnet Linear Synchronous Motor

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Reference Model Sliding Model Velocity Control for Linear El...

2009中国控制与决策会议

作者： Qing Hu~1,Hongxia Li~1,Hiayan Yu~2 and Guoqing Chang~3 1.School of Electrical Engineering,Shenyang University of Technology,Shenyang 110178,China 2.School of Information and Science Engineering,Shenyang University of Technology,Shenyang 110178,China 3.School of Electrical Engineering,Taixing Technology School,Taixing 225400,China

＜正＞In order to improve the tracking and robust performances of a linear elevator driving by permanent magnet linear synchronous motor（PMLSM）,a new linear motor speed loop control solution is presented,in which Coulomb friction model is used as the main compensation method and reference model sliding model control as the assistant control *** simulation results show that linear motor speed loop based on reference model sliding model control can not only overcome the effect of nonlinear friction and time-varying load,but also can weaken the chattering caused by sliding model control.

关键词： PMLSM sliding model control linear elevator reference model

Study on Ontology-Based reference model of Software Configuration Management

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Study on Ontology-Based Reference Model of Software Configur...

2011 3rd International Asia Conference on Informatics in Control, Automation and Robotics (CAR 2011 LNEE 132)

作者： Zhe Chen Xin Li Hong Yao Yuan-ning Liang Zhengzhou Information Science and Technology Institute

When dealing with hundreds of components, keeping track of version changes and various dependency constraints imposed on the system, Software configuration management(SCM) can be defined as the control of the evolution of complex software systems. In recent years, researchers have argued that using ontology to represent and drive knowledge infrastructure of software projects provides procedural knowledge. The advantages of using ontology for SCM are immense and cover various aspects of software development and evolution. In this paper, key challenges must be face for designing and implementing SCM is summarized. One of them is the limited capability on interoperating in different SCM tools. An ontology-based reference knowledge model base for SCM is presented. The reference model allows depicting complex relations between concepts and services operating in configuration management.

关键词： Software configuration management Ontolog-Driveny reference model Interoperability

Conceptual Framework of Electronic Business Technical reference model

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Conceptual Framework of Electronic Business Technical Refere...

第二十届全国数据库学术会议

作者： Wei Wang~(1,2) Shan-Ping Li~1 (College of Computer Science,Zhejiang University,Hangzhou 310027.China) 1 (College of Computer and Information,Shanghai Second Polytechnic University,Shanghai 201209,China) 2

Electronic Business Technical reference model(EBTRM)described in this paper is to provide a common conceptual framework so that the diverse electronic business information systems can better coordinate development, interoperability and data *** EBTRM provides guidance to developers,system architects in using and developing systems and technical *** use of the EBTRM can facilitate and enable manageability, interoperability and data sharing,enable scalability,support open systems concepts and promote product independence and software reuse in developing electronic business information systems.

关键词： Electronic business Information infrastructure Framework reference model Electronic business technical reference model(EBTRM)

Research on model reference Adaptive Hydraulic Servo Control System Based on Brain Emotional Learning model

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Research on Model Reference Adaptive Hydraulic Servo Control...

2012年计算机应用与系统建模国际会议

作者： Yu Zhongan Xie Zhenghua Cao Yue Jiangxi University of Science and Technology

According to the controlling of traditional complex hydraulic servo system is not precise enough, this paper presents an intelligent control method based on brain emotional learning (BEL) model. BEL model simulates the human brain emotional learning process, according to the neurobiology principle which has information organized function and emotional reaction between amygdale and orbital frontal cortex in the brain, established a calculating model (short for A-O model).This paper combined brain emotional learning model and model reference adaptive controlling, designed BEL intelligent controller, and made it (BELBIC) is used in hydraulic servo system. The results of the simulation have shown that BELBIC has fast speed reaction and good adaptive ability.

关键词： rain emotional learning model reference model Intelligent control Hydraulic control system

A More Accurate Reconstruction Method for Detecting Large-Depth Defects in Plates Using SH Guided Waves

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Acta Mechanica Solida Sinica 2021年第2期34卷 174-183页

作者： Yihui Da Qi Li Bin Wang Dianzi Liu Zhenghua Qian State Key Laboratory of Mechanics and Control of Mechanical Structures College of Aerospace EngineeringNanjing University of Aeronautics and AstronauticsNanjing210016China School of Engineering University of East AngliaNorwich NR47TJUK

The inspection of thickness thinning defects and corrosion defects is greatly significant for the health prediction of plate *** main aim of this research is to propose a novel and effective approach to achieve the accurate and rapid detection of arbitrary defects using shear horizontal(SH)guided waves,particularly for large-depth and complex *** proposed approach combines the quantitative detection of Fourier transform with a reference model-based strategy to improve the accuracy of large-depth defect *** the shallow defect profile is theoretically constructed by inverse Fourier transform of the product of reflection coefficients and integral coefficients of reference models,the unknown large-depth defect can be initially assessed using the relevant information from a predefined reference *** iteratively updating the integral coefficients of reference models,the accuracy of reconstruction of large-depth defects is much *** achieve the converged defect profile,a termination criterion,the root mean square error,is applied to guarantee the construction of defects with a high level of ***,the hybrid finite element method is used to simulate the propagation of SH guided waves in plates for calculating the reflection coefficients of plates with ***,to demonstrate the capability of the developed reconstruction method for defect detection in terms of accuracy and efficiency,three types of large-depth defect profiles,i.e.,a rectangular flaw,a double-rectangular flaw and a complex flaw,are *** show that the discrepancy between the predicted defect profile and the real one is quite small,even in the largest-depth defect case where the defect depth is equal to 0.733 times the plate thickness,the minimal difference is *** is noted that the fast convergence of the proposed approach can be achieved by no more than ten updates for the worst case.

关键词： Large-depth defect SH guided wave Iterative strategy reference model Hybrid FEM

Dynamic decoupling tracking control for the polytopic LPV model of hypersonic vehicle

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Science China(Information Sciences) 2015年第9期58卷 181-194页

作者： LAN Xue Jing WANG YongJi LIU Lei National Key Laboratory of Science and Technology on Multispectral Information Processing School of Automation Huazhong University of Science and Technology

The dynamic decoupling problem of the hypersonic flight vehicle(HFV) is considered in this *** Linear Parameter-Varying(LPV) model of the HFV is firstly obtained and smoothly transformed into a polytopic form by the Tensor-Product(TP) model transformation method. After that, a dynamic decoupling control method is derived by minimizing the H∞norm of a virtual system, which is composed by the controlled system and the no coupling reference model. The necessary and sufficient condition for the existence of the controller is derived based on Linear Matrix Inequalities(LMIs). Next, the decoupling controller for the polytopic LPV model of HFV is designed. And the simulation results show that the proposed method has perfect performance in terms of dynamic decoupling.

关键词： HFV polytopic LPV model reference model LMIs dynamic decoupling

Automatic landing system using neural networks and radio-technical subsystems

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Chinese Journal of Aeronautics 2017年第1期30卷 399-411页

作者： Romulus Lungu Mihai Lungu University of Craiova Faculty of Electrical Engineering

The paper focuses on the design of a new automatic landing system（ALS） in longitudinal plane; the new ALS controls the aircraft trajectory and longitudinal velocity. Aircraft control is achieved by means of a proportional-integral（PI） controller and the instrumental landing system– the first phase of landing（the glide slope） and a proportional-integral-derivative（PID） controller together with a radio-altimeter – the second phase of landing（the flare）; both controllers modify the reference model associated with aircraft pitch angle. The control of the pitch angle and longitudinal velocity is performed by a neural network adaptive control system, based on the dynamic inversion concept, having the following as components： a linear dynamic compensator, a linear observer, reference models, and a Pseudo control hedging（PCH） block. The theoretical results are software implemented and validated by complex numerical simulations; compared with other ALSs having the same radio-technical subsystems but with conventional or fuzzy controllers for the control of aircraft pitch angle and longitudinal velocity, the architecture designed in this paper is characterized by much smaller overshoots and stationary errors.

关键词： Adaptive control Automatic landing Neural network PID reference model

个性化决策助手Agent的参考模型与应用研究

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个性化决策助手Agent的参考模型与应用研究

第二十一届中国数据库学术会议

作者：张华姚莉张英朝国防科技大学管理科学与工程系

1引言网络信息环境的扩张和用户的个性化需求对当前的辅助决策研究提出了挑战,目前需要寻求一种新型的、有效的决策支持服务模式,以提高决策的质量和效率。一个特定的决策者是一个具有独特个性

关键词： PDSAA reference model User profiles User preferences Constructing methods

Variable Structure Control Approach to Damping Switch Controller of Semi-Active Air Suspension

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Variable Structure Control Approach to Damping Switch Contro...

2014中国汽车工程学会年会

作者： Xu Xing Zou Nannan Li Zhongxing Wu Yue School of Automotive and Traffic Engineering Jiangsu University School of Mechanical Engineering Hunan Institute of Technology

To develop a new kind of damping control system for semi-active air suspension,the structure and working mechanism of one specific type of semi-active air suspension is analyzed.A sky-hook suspension is used as the reference model,and the damping control system of vehicle using semi-active air suspension is proposed by Variable Structure Control（VSC）.The model of the damping control system of vehicle using semi-active air suspension is constructed in Matlah/*** four-wheel random road surface model has been used as the input of the simulation model,and the car body vibration is *** results show that the riding performance of vehicle is obviously improved by the proposed damping control system.

关键词： Semi-Active Air Suspension Variable Structure Control reference model Damping Switch Simulation