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Microwave pulping process for rice straw in basic ionic liquid [NH-(C2H4OH)3]+

Journal of Chemical and Pharmaceutical Research 2014年第8期6卷 260-263页

作者： Song, Wei Deng, Yu Xu, Ying Cui, Mingxian Tianjin Key Laboratory for Control Theory and Applications in Complicated Systems Tianjin University of Technology Tianjin China School of Materials Science and Chemical Engineering Tianjin University of Science and Technology Tianjin China Tianjin Key Laboratory of Pulp and Paper Tianjin University of Science and Technology Tianjin China Tianjin Key Laboratory for Control Theory and Applications in Complicated Systems Tianjin University of Technology Tianjin China

This paper makes study of microwave pulping process for rice straw in basic ionic liquid [NH-(C2H4OH)3]+. Ionic liquid is synthesized and the experiments are carried out on pulping process. The pulp yields are close to 40%. It belongs to the high yield chemical pulp. The average recovery rate of ionic liquid is 94%, which makes pulping process no pollution, that is, no black liquor. Test results show that the paper properties satisfy the general requirements of paper. XRD result indicates that rice straw cellulose crystal type is no obvious change after ionic liquid microwave cooking pulping. The damage degree of rice straw fiber is small. SEM analysis shows that the basic ionic liquid has a strong penetration under the supplementary role of microwave radiation. There is nosignificant difference for pulp fiber morphology by microscope observation after cooking pulping as well as and fiber length&width detection. These results show that the microwave pulping process for rice straw in basic ionic liquid is in line with the grasses pulping characteristics. © 2014, Journal of Chemical and Pharmaceutical Research. All Rights Reserved.

关键词： Microwaves

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A multidimensional information monitoring method for a novel robotic vascular interventional system

A multidimensional information monitoring method for a novel...

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International Conference on Information and Automation (ICIA)

作者： Jian Guo Lin Shao Shuxiang Guo Yang Yu Qiang Gao Tianjin Key Laboratory for Control Theory & Application in Complicated Systems Tianjin University of Technology China Intelligent Mechanical Systems Engineering Department Kagawa University Takamatsu Kagawa Japan

This paper proposed a multidimensional information monitoring method for a novel master-slave robotic vascular interventional system. We have designed a contact force sensor based on pressure sensitive rubber to transmit the force information to surgeon to improve the security during VIS (vascular interventional surgery). Furthermore, the motion information of catheter is also monitored in the information monitoring system. The multidimensional information monitoring system can also send out a warning message to remind the operator of the danger. The simulation experiments (in vivo) have been carried out to verify the information monitoring system. And, we got the force information by the contact force sensor when the catheter contacted with the blood vessel. We also carried out the motion monitoring experiment and got the motion data of the catheter. The experimental results indicated that the information monitoring system for the master-slave system works well and can improve the security of the master-slave system. In addition, the information monitoring system can provide convenience for the operator and avoid danger when the value exceeding a threshold.

关键词： Catheters Force Monitoring Surgery Robot sensing systems Arrays

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Linear Active Disturbance Rejection control of Solar Heating System Assisted by Ground-source Heat Pumps

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Procedia Engineering 2015年 121卷 809-815页

作者： Zhigang Wang Jiaguang Cheng Qingnan Zhang Pan Wang Yan Wang Tianjin Key Laboratory for Control Theory and Applications in Complicated System Tianjin 300384 China School of Electrical Engineering Tianjin University of Technology Tianjin 300384 China School of Environmental Science and Engineering Tianjin University Tianjin 300072 China

In this paper, a linear active disturbance rejection controller is proposed for a solar heating system assisted by ground-source heat pump, whose model is obtained by applying the system identification technique. The disturbances imposed on the heating system are estimated through an extended linear state observer and then compensated by a linear feedback control strategy. The proposed control strategy is applied to a 300 kW heating system to handle the thermal load variations of grid and process disturbances. The effectiveness of this controller is verified via a simulation study, and the results demonstrate that the proposed strategy can provide good tracking performance and disturbance rejection.

关键词： Heat pump Solar energy Heating system Active disturbance rejection control

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Rub-impact fault diagnosis of rotating machinery based on Hilbert-Huang transform 12th

Rub-impact fault diagnosis of rotating machinery based on Hi...

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IEEE International Conference on Mechatronics and Automation

作者： Yan Zhao Enshu Liu Junchao Zhu Baofeng Zhang Juan Wang Huan Tian Tianjin Key Laboratory for Control Theory and Applications in Complicated Systems Tianjin University of Technology Tianjin China Research Institute of Physical and Chemical Engineering of Nuclear Industry Tianjin China Dagang Oilfield Thermal Power Company Tianjin China

ISBN: (纸本)9781479970995

The rub-impact fault is one of the important faults of the rotating machinery. The rub-impact fault signal may be nonlinear and non-stationary. The Hilbert-Huang transform (HHT) is based on time-frequency signal processing technology, which is suitable for nonlinear and non-stationary signals. In this paper, the HHT transform is used to analyze the time-frequency characteristic of the rub-impact fault signal of a rotor test rig. The velocity sensor is used to measure the vibration signal of the rub-impact fault rotor. The experimental result shows that the HHT transform can effectively detect the rub-impact fault of the rotor, which implies great potential of the HHT transform in the fault diagnosis of rotor system.

关键词： Rotors Vibrations Transforms Time-frequency analysis Signal processing Fault diagnosis

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Research on application of solar photovoltaic grid power system research

Research on application of solar photovoltaic grid power sys...

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2014 International Conference on Manufacturing Technology and Electronics applications, ICMTEA 2014

作者： Wen, Yan-Hao Li, Da-Hua Li, Jun-Fang Jiang, Yu-Chen Tianjin University of Technology China Tianjin Key laboratory for Control Theory and Applications in Complicated Systems Tianjin China

ISBN: (纸本)9783038353287

Research on the conditions of solar photovoltaic grid connected power generation, research the form of converting solar energy into electrical energy *** paper introduces the solar photovoltaic system components, advantages and disadvantages as well as the current domestic solar photovoltaic power generation application status, prospect the development of the trend in the future, according to the analysis of the present problems. And relying on Tianjin CNOOC oil development group of Yingkou natural gas terminal 330KW solar photovoltaic power generation demonstration projects are introduced. For the photovoltaic CNOOC Yingkou terminal-station problems presents the feasibility scheme and suggestion. © (2014) Trans Tech Publications, Switzerland.

关键词： Solar energy

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Performance evaluation of the wireless micro robot in the fluid

Performance evaluation of the wireless micro robot in the fl...

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IEEE International Conference on Mechatronics and Automation

作者： Nan Liang Jian Guo Shuxiang Guo Xiang Wei Tianjin Key Laboratory for Control Theory & Application in Complicated Systems and Biomedical Robot Laboratory Tianjin University of Technology Tianjin China Intelligent Mechanical Systems Engineering Department Kagawa University Takamatsu Kagawa Japan

ISBN: (纸本)9781479970995

The capsule robot is one of important development direction in the field of wireless micro robot in-pipe and it is becoming a powerful tool for gastrointestinal tract inspection. In this paper, we proposed the symmetrical spiral micro robot with gravity compensation mechanism and then analysed the buoyancy and resistance of the robot in the fluid. Finally, we carried on the performance evaluation experiments of the robot in the fluid. The experimental results indicated that the micro robot has a good dynamic performance when the flow is about 26ml/min, compared to other flow value. In the horizontal direction the maximum velocity of the robot is about 30.44mm/s and 6.49mm/s in the case of downstream and counter current respectively. In the vertical direction the maximum velocity of the robot is about 10.1mm/s and 1.34mm/s in the case of downstream and counter current respectively while it is doing upward movement. In the vertical direction the maximum velocity of the micro robot is about 10.11mm/s and 1.337mm/s in the case of downstream and counter current respectively while it is doing downward movement. In addition, the flow has influence on transition frequency of the micro robot. The faster flow is, the lower transition frequency of the micro robot has. The experimental platform we set up can reflect the conditions of human gastrointestinal tract, so the performance evaluation of the micro robot in this paper will provide a strong support for the future clinical application.

关键词： Robots Radiation detectors Buoyancy Gastrointestinal tract Immune system Spirals

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Deduction of coordinate transform for instantaneous reactive power theory 3

Deduction of coordinate transform for instantaneous reactive...

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3rd International Conference on Civil, Architectural and Hydraulic Engineering, ICCAHE 2014

作者： Zhou, Xue-Song Wang, Da-Yan Ma, You-Jie Tianjin University of Technology Tianjin Key Laboratory for Control Theory and Applications in Complicated Systems Nankai District Tianjin China

ISBN: (纸本)9783038352594

By means of building up a three-dimension coordinate system in vector space, the coordinate transform used in instantaneous reactive power theory (IRPT) proposed by H. Akagi is deduced and through spatial coordinate transform two equivalent three-dimension coordinate systems are obtained. After rigorous mathematical deduction the transformation factor for above-mentioned three-dimension coordinate systems is achieved, thus the coefficient deduction for IRPT is solved and the zero-sequence quantity expressing three-phase asymmetrical system is directly obtained. By use of the theory of rotating phasor, the basic principle of instantaneous spatial vector detection method based on IRPT is explained. The authors’ analysis is available for understanding and improvement of this harmonic current detection method.

关键词： Vector spaces

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V2g technology for electric vehicles 3

V2g technology for electric vehicles

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3rd International Conference on Civil, Architectural and Hydraulic Engineering, ICCAHE 2014

作者： Zhou, Xue-Song Kong, Xiao-Li Ma, You-Jie Tianjin University of Technology Tianjin Key Laboratory for Control Theory and Applications in Complicated Systems Nankai District Tianjin China

ISBN: (纸本)9783038352594

V2G technology is an important part of the smart grid,which realizes the power inter-transformation between Power Grid and electric vehicles [1]. V2G technology is introduced and the structure of charging and discharging system in V2G technology is analyzed [2]. Under synchronous rotating frame, the combination current-controlled and Voltage space vector control method is adopted, which carries out the power inter-transformation between Power Grid and electric vehicles [3].

关键词： Vehicle-to-grid

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Introduction of the direct drive wind power generation system 3

Introduction of the direct drive wind power generation syste...

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3rd International Conference on Civil, Architectural and Hydraulic Engineering, ICCAHE 2014

作者： Zhou, Xue-Song Guo, Hui-Min Ma, You-Jie Tianjin University of Technology Tianjin Key Laboratory for Control Theory and Applications in Complicated Systems Xiqing District Tianjin China

ISBN: (纸本)9783038352594

With the development of economy, the energy demand is becoming bigger and bigger, the development of wind energy is one of the main ways to solve energy crisis. In terms of energy utilization, high power wind power connected to the grid is currently one of the most effective ways of wind energy utilization. The wind power generation system connected to the grid plays the role of the changing wind energy into mechanical energy by wind turbines, and then converts mechanical energy into electrical energy by a generator. Because CSCF wind turbine works with the gearbox, which is low efficiency, noise and mechanical loss. And it has not been able to meet the needs of the times. Therefore, the direct drive wind power technology capable of tracking the maximal power point of wind power at rated wind speed has become one of the hot spots in the present research. This paper introduces the converter of the direct drive wind power system and analyzes the working principle of the direct driven permanent magnet synchronous wind power system.

关键词： Wind power

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A Largely Model Independent Solution for the Position control of a Typical Inverted Pendulum System 33

A Largely Model Independent Solution for the Position Contro...

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第三十三届中国控制会议

作者： GAO Qiang CHEN Shasha LI Yi LI Junfang Tianjin Key Laboratory for Control Theory & Applications in Complicated Systems School of Electrical EngineeringTianjin University of Technology Tianjin Key Laboratory of Intelligent Robotics Nankai University

ISBN: (纸本)9781479947249

An Active Disturbance Rejection based solution is proposed for the position control of a standard inverted pendulum system, demonstrating a largely model independent design that is distinctly different from existing model-based designs from classical as well as modern control theory. The quality of the control loop is further improved with a unique double disturbance observer design, which rejects independently the disturbance and uncertainty in both the pendulum itself and the cart that carries it. This proposed approach offers a promising and practical solution because it's intuitive to understand and easy to tune, in addition to its strong performance and effectiveness shown in both simulation study and real time experimentation.

关键词： ADRC LESO Inverted pendulum Real-time control

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