检索结果-内蒙古大学图书馆

Improvement of hydraulic edge position control system by proportion sliding mode of self-tuning switching gain

Research Journal of Applied Sciences, Engineering and Technology 2012年第21期4卷 4237-4244页

作者： Baoquan, Jin Dongbing, Chen Key Lab of Ministry of Education for Advanced Transducers and Intelligent Control System Taiyuan University of Technology China

Aiming at the problem of tracking performance degradation of hydraulic EPC system caused by time-varying inertia parameters, nonlinear and external disturbances, the proportion sliding mode control of fuzzy self-tuning gain was proposed. The EPC system state space model on deviation parameters was established and the main feedback sliding mode switching algorithm was designed. The fuzzy method was used to dynamically adjust the proportion sliding mode switching gain by product of the switching function and its derivative state and to adaptive compensate for the uncertainty of the system. At the same time to ensure the effectiveness of the design strategy, the controller model and physical model worked together to simulate the actual conditions. The fixed switching gain switch was, respectively greater and smaller and compared with the fuzzy self-tuning gain, in which the latter achieves a fast and coordinated control of chattering. The results show that after comprehensive consideration all interference the system is stable, fast response, high accuracy and to solve chattering problem caused by the traditional large switching gain of proportion sliding mode. © Maxwell Scientific Organization, 2012.

关键词： Sliding mode control

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Development of High-Speed On-Of Valves and Their Applications

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Chinese Journal of Mechanical Engineering 2022年第4期35卷 21-41页

作者： He Wang Zhen Chen Jiahai Huang Long Quan Bin Zhao Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of EducationTaiyuan University of TechnologyTaiyuan 030024China

With the widespread application of the computer and microelectronic technology in the industry,digitization becomes the inevitable developing trend of the hydraulic *** of the hydraulic components is critical in the digital hydraulic ***-speed on-of valves(HSVs)which convert a train of input pulses into the fast and accurate switching between the on and of states belong to widely used basic digital hydraulic *** some ways,the characteristics of the HSVs determine the performance of the digital hydraulic *** paper discusses the development of HSVs and their ***,the HSVs with innovative structures which is classifed into direct drive valves and pilot operated valves are discussed,with the emphasis on their ***,an overview of HSVs with intelligent materials is presented with considering of the switching frequency and fow ***,the applications of the HSVs are reviewed,including digital hydraulic components with the integration of the HSVs and digital hydraulic systems controlled by the HSVs.

关键词： High-speed on-of valve Digital hydraulic component Switching frequency Flow rate Innovative structure intelligent material

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Detection of DNA Bases Using Fe Atoms and Graphene

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Chinese Physics Letters 2016年第1期33卷 123-126页

作者：胡建芬冯琳张文星李勇卢亚鑫 Key Laboratory of Advanced Transducers and Intelligent Control System(Ministry of Education) Department of PhysicsTaiyuan University of Technology

The adsorption of DNA bases on a magnetic probe composed of Fe atoms and graphene is studied by using first- principles calculations. The stability of geometry, the electronic structure and magnetic property are investigated. The results indicate that four DNA bases, i.e., adenine, thymine, cytosine and guanine, can all be adsorbed on the probe solidly. However, the magnetic moments of the composite structure can be observed only when adenine adsorbs on the probe. In the cases of the adsorption of the other three bases, the magnetic moments of the composite structure are zero. Based on the significant change of magnetic moment of the composite structure, adenine can be distinguished conveniently from thymine, cytosine and guanine. This work may provide a new way to detect DNA bases.

关键词： of on as in Fe Detection of DNA Bases Using Fe Atoms and Graphene that DNA is

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Electric field effect in ultrathin zigzag graphene nanoribbons

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Chinese Physics B 2015年第7期24卷 356-359页

作者：张文星刘云霄田华许军伟冯琳 Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of EducationPhysics DepartmentTaiyuan University of Technology

The electric field effect in ultrathin zigzag graphene nanoribbons containing only three or four zigzag carbon chains is studied by first-principles calculations, and the change of conducting mechanism is observed with increasing in-plane electric field perpendicular to the ribbon. Wider zigzag graphene nanoribbons have been predicted to be spin-splitted for both valence band maximum（VBM） and conduction band minimum（CBM） with an applied electric field and become half-metal due to the vanishing band gap of one spin with increasing applied field. The change of VBM for the ultrathin zigzag graphene nanoribbons is similar to that for the wider ones when an electric field is applied. However, in the ultrathin zigzag graphene nanoribbons, there are two kinds of CBMs, one is spin-degenerate and the other is spin-splitted, and both are tunable by the electric field. Moreover, the two CBMs are spatially separated in momentum space. The conducting mechanism changes from spin-degenerate CBM to spin-splitted CBM with increasing applied electric field. Our results are confirmed by density functional calculations with both LDA and GGA functionals, in which the LDA always underestimates the band gap while the GGA normally produces a bigger band gap than the LDA.

关键词： electric field density functional theory zigzag nanoribbon

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The communication system for power monitoring in the underground coal mine

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Advances in Information Sciences and Service Sciences 2012年第21期4卷 459-467页

作者： Jin, Baoquan Wang, Yonghong Wang, Qinglin Key Lab of Advanced Transducers and Intelligent Control System Ministry of Education Taiyuan University of Technology Taiyuan China

Power monitoring system in the underground coal mine is used for real-time monitoring power supply equipment. The communication for power monitoring system plays an important role on ensuring information transmission of coal mine safety production. The monitoring of the coal mine power sub-station is designed, transfer information by free port communication based on RS485 communication, build communication protocol and ethernet communication hardware systems, establish the remote transmission communication between the underground and the ground for control of power system information transmission. Studies show that information transmission schedule reliably ensures the information transmission of the power monitoring system.

关键词： Monitoring

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Geneva Hosts "ICT In Motor Vehicles" Workshop

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IEEE VEHICULAR TECHNOLOGY MAGAZINE 2009年第1期4卷 15-17页

作者： Bodson, Dennis Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of Education Taiyuan University of Technology Taiyuan

The 'Information and Communication Technologies (ICT) In Motor Vehicles' Workshop was held at the Geneva International Motor Show between 4-5 March, 2009. The theme of the workshop was 'The Fully Networked Car', which focused on the integration of ICT in motor vehicles. A large number of experts, including engineers, designers, planners, government officials, regulators, and standards experts attended the event. The presentations focused on the issues facing the ICT and the automotive industries. One of the major topics discussed by the participants at the event was concerned with ICT and the impact of climate change. Some of the other topics that were discussed at the event included standards and spectrum, car-to-X communications, nomadic devices, voice and audiovisual services, advanced driver assistance systems, and wireless technologies for car production lines.

关键词： Vehicles Telecommunication standards Testing IP networks Web and internet services Protocols Feedback Conferences Internet telephony Network servers

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High-accuracy disposable micro-optical anti-counterfeiting labels based on single-molecule quantum coherence

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Optics Express 2025年第9期33卷 19771-19787页

作者： Shuangping Han Kai Song Pengyu Zan Changzhi Yu Ao Li Haitao Zhou Chengbing Qin Liantuan Xiao College of Physics and Optoelectronics Engineering Taiyuan University of Technology Taiyuan Shanxi 030024 China Key Laboratory of Advanced Transducers and Intelligent Control System of Ministry of Education Taiyuan University of Technology Taiyuan 030024 China Department of Nuclear Medicine The First Hospital of Shanxi Medical University Collaborative Innovation Center of Molecular Imaging Precision Medical Shanxi Medical University Taiyuan 030001 China State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Laser Spectroscopy Shanxi University Taiyuan Shanxi 030006 China chbqin@*** xiaoliantuan@***

In this work, we introduce an innovative approach to single-molecule quantum coherence (SMQC)-based disposable micro-optical anti-counterfeiting labels. This method facilitates the editing and reading of anti-counterfeiting with single molecules used as the anti-counterfeiting information labels. The label is meticulously crafted through inkjet printing technology, while its authentication is achieved via frequency domain imaging. Through a validation process including experimental demonstration, numerical simulation, and neural network analysis, we demonstrate the feasibility of this approach, further validate the integrity of the miniature anti-counterfeiting information storage, and verify the signal extraction accuracy with the recognition accuracy of the labels is consistently above 99.995%. The combination of SMQC-based disposable micro-optical anti-counterfeiting technology is expected to enable more precise preparation of single-molecule-array chips, thus providing a crucial foundation for the advancement of high-tech and intelligent manufacturing industries.

关键词： Femtosecond pulses Fourier transforms Numerical simulation Optical materials Optical tweezers Scanning tunneling microscopy

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Design and characteristic research of a novel electromechanical-hydraulic hybrid actuator with two transmission mechanisms

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Frontiers of Mechanical Engineering 2023年第2期18卷 189-204页

作者： Shufei QIAO Long QUAN Yunxiao HAO Lei GE Lianpeng XIA Key Laboratory of Advanced Transducers and Intelligent Control System of Ministry of Education Taiyuan University of TechnologyTaiyuan 030024China

Servo-hydraulic actuators(SHAs)are widely used in mechanical equipment to drive heavy-duty ***,their energy efficiency is low,and their motion characteristics are inevitably affected by uncertain *** actuators(EMAs)possess superior energy efficiency and motion ***,they cannot easily drive heavy-duty mechanisms because of weak bearing *** study proposes and designs a novel electromechanical-hydraulic hybrid actuator(EMHA)that integrates the advantages of EMA and *** mainly features two transmission *** piston of the hydraulic transmission mechanism and the ball screw pair of the electromechanical transmission mechanism are mechanically fixed together through screw bolts,realizing the integration of two types of transmission *** control scheme of the electromechanical transmission mechanism is used for motion control,and the hydraulic transmission mechanism is used for power ***,the mathematical model,structure,and parameter design of the new EMHA are ***,the EMHA prototype and test platform are *** test results prove that the EMHA has good working characteristics and high energy *** with the valve-controlled hydraulic cylinder system,EMHA exhibits a velocity tracking error and energy consumption reduced by 49.7% and 54%,respectively,under the same working conditions.

关键词： electromechanical-hydraulic hybrid actuator(EMHA) integration transmission mechanisms power assistance energy efficiency working characteristics

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Analysis of magnetic memory signal of dynamic stress changes for steel-cord conveyor belt

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Energy Education Science and Technology Part A: Energy Science and Research 2012年第SUPPL.2期30卷 207-214页

作者： Qiao, Tiezhu Li, Xiaolu Ma, Fuchang Education Ministry Key Lab of Advanced Transducers and Intelligent Control System Taiyuan University of Technology Taiyuan City 030024 China

Metal magnetic memory technology was an important method for detecting the steel-cord conveyor belt early fault, the use of magnetic memory signal maximum gradient value can quickly judge the stress concentration zone, but the magnetic memory signal is susceptible to the effects of environmental and noise;because of the multi-scale transient analysis of wavelet transform provided a suitable way for detecting the singularity points of magnetic memory signal. For the magnetic memory signal is weak and non-stationary, this paper has combined the metal magnetic memory detecting maximal gradient value with singularity detecting theory based on wavelet transform modulus maximum, the method could exactly judged the stress concentration zone of joints and located the fault points of the steel-cord belt, the characteristic gradient of magnetic memory signal and the Lipschitz exponent were extracted. Result of simulation indicated the technology was effectively for judging stress concentration zone and fault point. © Sila Science.

关键词： Wavelet transforms

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Fuzzy PID control study based on electrohydraulic servo proportional valve position

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Energy Education Science and Technology Part A: Energy Science and Research 2013年第1期31卷 437-440页

作者： Wang, Xuping Taiyuan University of Technology Key Lab of Advanced Transducers and Intelligent Control System Ministry of Education Taiyuan 030024 China

Aiming at reasonable parameters approximation for the electro-hydraulic servo system, and parameters offset due to temperature changes caused, and as well as system inherent in the dead zone, hysteresis effect nonlinear factors, analysis of approximate dynamic mathematical model based on the position of the servo proportional valve control. On the basis of conventional PID, fuzzy PID control is proposed to be applied to the servo proportional valve controlled cylinder system. And joint simulation results showed that the Fuzzy PID control system based on servo proportional valve electro-hydraulic servo system, compared with the traditional PID control system has a fast response, short rise time, overshoot characteristics. This in theory of electro-hydraulic servo control system has certain reference significance. © Sila Science.

关键词： Simulink

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