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Realizing mode conversion and optical diode effect by coupling photonic crystal waveguides with cavity

Chinese Physics B 2015年第9期24卷 284-288页

作者：叶寒张金倩楠俞重远王东林陈智辉 State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications Theoretical Condensed Matter Physics and Computational Materials Physics Laboratory School of PhysicsUniversity of Chinese Academy of Sciences Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of Education and Shanxi ProvinceTaiyuan University of Technology

We propose a novel two-dimensional photonic crystal structure consisting of two line defect waveguides and a cavity to realize mode conversion based on the coupling effect. The W1/cavity/W2 structure breaks the spatial symmetry and successfully converts the even（odd） mode to the odd（even） mode in the W2 waveguide during the forward（backward）transmission. When considering the incidence of only the even mode, the optical diode effect emerges and achieves approximate 35 d B unidirectionality at the resonant frequency. Moreover, owing to the narrow bandpass feature and the flexibility of the tuning cavity, utilization of the proposed structure as a wavelength filter is demonstrated in a device with a Y-branch splitter. Here, we provide a heuristic design for a mode converter, optical diode, and wavelength filter derived from the coupling effect between a cavity and adjacent waveguides, and expect that the proposed structure can be applied as a building block in future all-optical integrated circuits.

关键词： mode conversion optical diode photonic crystal

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Comparative Study of Two 2-RPU+SPR Parallel Manipulators

Comparative Study of Two 2-RPU+SPR Parallel Manipulators

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World Congress on intelligent control and Automation

作者： Qiang Yan Bin Li Yangmin Li Xinhua Zhao Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control School of Mechanical Engineering Tianjin University of Technology Tianjin 300191 China

ISBN: (纸本)9781467384155

A comparative study of two over-constrained 2-RPU+SPR parallel manipulators (PM) is studied in terms of workspace and transmission performance in this paper. The two 2-RPU+SPR PMs have identical kinematics limbs, but some differences exist in terms of the joints distribution. The kinematics, the workspace and the transmission performance are studied and simulation examples are presented to demonstrate the differences between the two PMs. This study provides insights into the two parallel manipulators with identical limbs but with different joints distribution.

关键词： Decision support systems TV intelligent control Automation Senior members

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The design of dummy ROV electric-drive seven functions manipulator

The design of dummy ROV electric-drive seven functions manip...

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2016 3rd International Conference on Materials Engineering,Manufacturing Technology and control(ICMEMTC 2016)

作者： Zaiyu Chen Meina Guo Zhenzhong Liu Lianyu Zhao Offshore Oil Engineering Co. Ltd. Tianjin Key Laboratory of the Design and Intelligent Control of the Advanced Mechatronical System Tianjin University of Technology

With the deepening of the Marine development, underwater constructing often need to use the ROV. In order to verify the construction scheme, ensuring construction efficiency, the staff will use ROV or Dummy ROV on land to simulate construction. As the main body of the ROV, the manipulator is the execution part of the system. It is the core of the whole system;all of the drive and control are around it. It references the mature underwater manipulator, and draw lessons from the domestic manipulator design experience. The design adopts electric drive, and the joints torque were calculated and simulated by the Solid Works motion analysis software.

关键词： Dummy ROV seven functions manipulator manipulator design

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The Frame Structure Design of three Lifting Point Dummy ROV

The Frame Structure Design of three Lifting Point Dummy ROV

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2016 3rd International Conference on Materials Engineering,Manufacturing Technology and control(ICMEMTC 2016)

作者： Xingwei Guo Jie Song Zhenzhong Liu Offshore Oil Engineering Co. Ltd. Tianjin Key Laboratory of the Design and Intelligent Control of the Advanced Mechatronical System Tianjin University of Technology

Research the depth of 3000 m Work-Class ROV as mock object and develop a ROV for land test. This device is set three lifting point in the top. The rope connecting the front two lifting point is fixed, the rope connecting the rear lifting point change the length by motor. All of those lifting point are in order to achieve the function of forerake and hypsokinesis. The Dummy ROV can displace the real ROV to simulate the land construction, improve the efficiency of ocean construction and reduce the cost of experiment.

关键词： Lifting point dummy ROV frame structure

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先导数字调速阀特性分析（英文）

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机床与液压 2016年第6期44卷 25-29页

作者： Xiao-xia GUO Tao- tao LI Jia-hai HUANG Long QUAN Sheng-guo WANG Key Lab of Advanced Transducers and Intelligent Control System Ministry of Education and Shanxi Province Taiyuan University of Technology Taiyuan 030024 China Technology Center of Taiyuan Heavey Machinery Group Yuci Hydraulic Industry Yuci 030600 China

Flow control valve generally consists of constant pressure difference reducing valve and throttle *** it works under the condition of high differential pressure and flow, the pressure loss of reducing valve in-stalled in main loop will get increased and the hydraulic oil temperature will be increased as well. A digital pilotflow control valve is studied in this paper. The main stage is a cartridge valve based on the flow amplifying princi-ple. The pilot stage is digital flow control valve which consists of digital valve and constant pressure difference re-ducing valve. The digital valve controlled by PWM signal has some characteristics such as less throttling loss andgood repeatability. The high pressure loss and hydraulic oil temperature will be effectively reduced by using con-stant pressure difference reducing valve in the small flow pilot circuit. Through theoretical derivation and simula-tion research, the feasibility of this valve is verified, and some conclusions are drawn for the relationships betweenthe performance and structure parameters, which provides theoretical basis for their design.

关键词： Digital flow control valve Pilot control Simulation

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Design and kinematic simulation of a novel exoskeleton rehabilitation hand robot

Design and kinematic simulation of a novel exoskeleton rehab...

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IEEE International Conference on Mechatronics and Automation

作者： Shuxiang Guo Weijie Zhang Jian Guo Jiange Gao Yuye Hu Tianjin Key Laboratory for Control Theory & Applications in Complicated Systems and Biomedical Robot Laboratory Tianjin University of Technology Tianjin China Intelligent Mechanical Systems Engineering Department Kagawa University Takamatsu Japan Tianjin Key Laboratory of the Design and Intelligent Control of the Advanced Mechatronical System Tianjin China

ISBN: (纸本)9781509023974

The rehabilitation exoskeleton robot is more and more used in the assisting stroke patients in implementing rehabilitation training. In this paper, a novel exoskeleton hand robot which was driven by cable has been proposed to aim at helping varieties of paralyses patients recover motor function. This exoskeleton hand rehabilitation robot system mainly consists of exoskeleton hand robot, EEG system, motor controllers unit, some sensors and a workstation. And the hand exoskeleton mechanism was portable, wearable and adjustable for patients doing home rehabilitation training. Based on the parameters from human hand, the kinematic model of hand robot was established to be used in designing and the kinematic simulation experiments about this exoskeleton hand robot were done. Through the simulation software ADAMS (Automatic Dynamic Analysis of Mechanical systems), the parameters of position, angle velocity and angle accelerated velocity (PVA) of proximate inter-phalanger (DIP) distal inter-phalanger joint were simulated. And then, the movement situation of the DIP joint was obtained according to the data from the position encoder. So the velocity curve and accelerated velocity curve were obtained by calculating the actual position function derivation. The simulated results showed that this exoskeleton hand robot has high movement ability to finish the continuous passive motion (CPM). Beside that, a comparison test was done to verify whether there were some motion blocks in wearing exoskeleton robot. Through analyzing the experimental data, the error between the actual position and the simulated position of the PIP joint of the finger was very small which verified the small interference of robot. These experiments demonstrated that the exoskeleton hand robot has high efficiency movement ability for stroke patients who need to do the finger rehabilitation training. In the future, the optimization design of the exoskeleton hand robot will be done in order to improve more mov

关键词： Exoskeletons Thumb Robot sensing systems Joints Training

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Design of the structural optimization for the upper limb rehabilitation robot

Design of the structural optimization for the upper limb reh...

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IEEE International Conference on Mechatronics and Automation

作者： Shuxiang Guo Jiange Gao Jian Guo Weijie Zhang Yuye Hu Tianjin Key Laboratory for Control Theory & Applications in Complicated Systems and Biomedical Robot Laboratory Tianjin University of Technology Tianjin China Intelligent Mechanical Systems Engineering Department Kagawa University Takamatsu Japan Tianjin Key Laboratory of the Design and Intelligent Control of the Advanced Mechatronical System Tianjin China

ISBN: (纸本)9781509023974

The exoskeleton robotic rehabilitation training system is a branch of the field of robotics, it is the external mechanical system that is consistent with the similar joints of the human body, and attached to the human body. With the development of exoskeleton rehabilitation robotic system, the biomechanics influence of device should be considered in rehabilitation training. This paper proposes a novel upper limb exoskeleton rehabilitation device based on biomechanics, which can be used in rehabilitation of upper limb for hemi paralysis patients. This system aims at helping hemi paralysis patients recover motor function of upper limb; in addition it is suitable for variety of patients. This system is portable and wearable, which consists of exoskeleton device, hepatic device (PHANTOM Premium), motor controllers and work station (computer). This paper proposes a structural optimization scheme in order to solve some problems of bowl's structure of the rehabilitation robot. The Pro/ENGINEER Wildfire (Pro/E) software is applied to get a three-dimensional modelling, kinematics simulation and dynamic analysis of the rehabilitation robot. From the analysis, the robot end motion simulation curves were obtained to verify the optimization structure reasonable and better motion characteristics. In the future, this structure will have a wide application prospect in the rehabilitation therapy field.

关键词： Robots Exoskeletons Wrist Jacobian matrices Gears Optimization Acceleration

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Study on optical nonlinearity and optical limiting property of porphyrin-oxygenated carbon nanomaterial blends

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Optoelectronics Letters 2015年第3期11卷 161-165页

作者：温浩张校亮刘智波鄢小卿李晓春田建国 Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of Education Taiyuan University of Technology College of Physics and Optoelectronics Taiyuan University of Technology Key Laboratory of Weak Light Nonlinear Photonics Ministry of Education Teda Applied Physics School and School of Physics Nankai University

Stable porphyrin-oxygenated carbon nanomaterial dispersions were prepared by blending porphyrin solutions with hydroxyl groups modified multi-walled carbon nanotubes(MWNTs-OH)and graphene oxide(GO)dispersions,*** nonlinearity and optical limiting(OL)property of these blends are investigated in nanosecond *** show that the OL performance of the blends can be tuned by changing the concentrations ratio of porphyrin and oxygenated carbon *** high concentration of oxygenated carbon nanomaterial leads to the poor OL ***,with the moderate concentration,the blends exhibit the low threshold value of OL and the enhanced OL performance at high fluence *** superior OL performance can be attributed to complementary mechanisms and possible photoinduced electron or energy transfer between porphyrin moiety and oxygenated carbon nanomaterials.

关键词： Blending Carbon Dispersions Energy transfer Graphene Nanostructured materials Nonlinear optics Optical properties Porphyrins Yarn

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Application and development of digital image correlation method in biomechanics

Application and development of digital image correlation met...

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第五届国际仿生工程学术大会(ICBE2016)

作者： Qiu Lulu Zhang Chunqiu School of Mechanical Engineering Tianjin University of Technology Tianjin Key Laboratory of the Design and Intelligent Control of the Advanced Mechanical System School of Mechanical EngineeringTianjin University of Technology

With the rapid development of computer technology and electronic equipment, as well as the corresponding improvement of algorithm, digital image correlation technology has attracted the attention of all walks of life. The digital image correlation method possesses a series of advantages like simple optical path, high precision and fast processing speed, which meets the demand of unique biomechanical properties and biological organization environment. This paper analyses the development process through the research of digital image correlation method and summarizes its application in biomechanical *** study also presents the method of digital image using in biomechanics aspects, showing the research progress and development trends about digital image correlation method in biomechanics. Besides this paper suggests some difficult problem existing to be solved and puts forward the corresponding solutions.

关键词： Digital image correlation method biomechanic speckle

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A kind of online self-tuning smith predictor

A kind of online self-tuning smith predictor

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IEEE International Conference on Mechatronics and Automation

作者： Xu Chen Fei Meng Xiaopeng Chen Qiang Huang Intelligent Robotics Institute Beijing Institute of Technology Beijing China Beijing Advanced Innovation Center for Intelligent Robots and System Beijing Institute of Technology Beijing China Key Laboratory of Biomimetic Robots and Systems Beijing Institute of Technology Beijing China International Joint Research Laboratory of Biomimetic Key Laboratory of Intelligent Control and Decision of Comp lex System Beijing China

ISBN: (纸本)9781509023974

This paper presents an online self-tuning Smith Predictor for the First Order Plus Dead Time Model (FOPDT). It can tune time delay through oscillated input and output. Realtime phase difference detection is used to obtain the phase difference between the input and the output. An online tuner is used to minimize the phase difference. Once the phase difference is minimized, the exact time delay is completely compensated. Our method is suitable for both systems with constant time delay or variant time delay.

关键词： Delay effects Temperature control Delays Predictive models Oscillators Robots

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