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IEEE International Conference on Mechatronics and Automation

作者： Lei Shao Guoling Dong Jun Liu Yi Mu Peng Guo Tianjin Key Laboratory for Control Theory & Applications in Complicated Systems Tianjin University of Technology Tianjin China Department of Mechanical Engieering University of Canterbury Christchurch New Zealand

ISBN: (纸本)9781479939800

In order to improve the contour generation rate in drawing contour maps of rainfall of tianjin, we propose a contour generation algorithm based on grid sequence, which according to the characteristics of historical data in meteorological field and the contours drawing requirements. Using this algorithm can make the drawing method efficient and intuitive. This algorithm based on Delaunay irregular triangulation using a new method to compare the grid endpoints with itself before with contour values. So it avoids the problem of selecting a starting point, simplifies the determination of grid export, and effectively reduces the frequency of comparing the contours value and endpoint. This clear, concise algorithm is suitable for contour expressing in meteorological field and other scientific data generation in similar circumstances.

关键词： Conferences Mechatronics Automation Design automation

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A novel tree trunk recognition approach for forestry harvesting robot

A novel tree trunk recognition approach for forestry harvest...

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IEEE Conference on Industrial Electronics and applications (ICIEA)

作者： Lei Shao Xiaoqi Chen Bart Milne Peng Guo Tianjin Key Laboratory for Control Theory & Applications in Complicated Systems Tianjin University of Technology Tianjin China Department of Mechanical Engineering University of Canterbury Christchurch New Zealand

ISBN: (纸本)9781479943142

Robotisation of forestry harvesting in New Zealand has the potential to achieve great productivity benefits and support the timber industry in the face of global market competition. Recognition and localization of tree trunks is the first critical operation for an autonomous forestry harvesting robot and is a challenging task due to variations of illumination under normal forestry harvesting conditions. This paper presents a novel method of recognizing tree trunks based on Hough Transforms of the L*a*b* colour space representation of the harvesting scene. The test results show that the proposed algorithm is able to correctly determine the location and shape information of tree trunks in various lighting conditions. This method lays a strong foundation for further research on autonomous operation of forestry harvesting robots in steep terrain.

关键词： Decision support systems Conferences Industrial electronics Robots Transforms Image color analysis Vegetation

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Numerical simulation of minimally invasive correction surgery of pectus excavatum with scoliosis

Numerical simulation of minimally invasive correction surger...

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IEEE International Conference on Mechatronics and Automation

作者： Meijiao Zhao Peibei Dong Jinduo Ye Jifu Liu Weihong Zhong Chunqiu Zhang Tianjin Key Laboratory for Control Theory & Applications in Complicated Industry Systems Tianjin University of Technology Tianjin China The Military General Hospital of Beijing PLA Beijing China

ISBN: (纸本)9781479939800

Objective: Establish three dimensional solid model of thorax of pectus excavatum with scoliosis, carry out numerical simulation of minimally invasive correction surgery of pectus excavatum with scoliosis, study the influence how pectus excavatum correction affect scoliosis, and conduct clinical correction surgery. Methods: Reconstructed the model of thorax of pectus excavatum with scoliosis by CT images with software Mimics, simulate minimally invasive correction process by considering geometrical non-linear finit element method, design correction surgery plan, and carry out correction surgery according to the result of numerical calculation. Result: The result of calculation indicates that if the spine twisted toward the direction of the location of pectus excavatum, the scoliosis will be improved, the symptom of which will be ease. The surgery plan designed by the result of numerical calculation has been adapted to clinical surgery, and a good result has been obtained.

关键词： Solid modeling Surgery Numerical models Sternum Software Finite element analysis

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The establishment and data mining of meteorological data warehouse

The establishment and data mining of meteorological data war...

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IEEE International Conference on Mechatronics and Automation

作者： Lei Shao Jun Liu Guoling Dong Yi Mu Peng Guo Tianjin Key Laboratory for Control Theory & Applications in Complicated Systems Tianjin University of Technology Tianjin China Department of Mechanical Engieering University of Canterbury Christchurch New Zealand

ISBN: (纸本)9781479939800

Along with the continuous development of the modernization level of meteorological service, meteorological data has been steadily on the increase, which results in a higher and higher demand of meteorological department for meteorological data storage, management, and read. Through analyzing the framework of Distributed File system, Data Warehouse Tool Hive of the open source cloud platform - Hadoop, the Build Process of the Hadoop meteorological cloud platform is studied. Based on Naïve Bayes algorithm research, a kind of method which can transplant it to the Hadoop platform is found.

关键词： Conferences Mechatronics Automation

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Study on multiple image processing hardware system based on DSP

Study on multiple image processing hardware system based on ...

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IEEE International Conference on Mechatronics and Automation

作者： Junchao Zhu Yongchen Li Zhijun Ma Yingkui Jiao Baofeng Zhang Tianjin Key Laboratory for Control Theory and Applications in Complicated Systems Tianjin University of Technology Xiqing District Tianjin China School of Electrical Engineering Tianjin University of Technology Xiqing District Tianjin China

ISBN: (纸本)9781479939800

This paper presents the hardware system scheme of multi-channel image processing based on DSP, with DSP as the core control of FPGA and CMOS, responsible for the overall scheduling system, using FPGA as coprocessor responsible for the collection of the original image information from CMOS. This paper combines the fisheye lens to obtain the complete original image for panoramic vision and stereo vision requirement. FPGA is used to design the SRAM cache controller based on Ping-pong mechanism. The data exchanging between DSP and FPGA are completed in EDMA model of DSP. Asynchronous FIFO is applied to solve the problem of cross clock domain. Experiments show that the system can be realized in the image data acquisition speed of 45 frames per second and the output of PAL style distortion fisheye image.

关键词： Field programmable gate arrays Digital signal processing CMOS integrated circuits Lenses Hardware Image processing Random access memory

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A Pure Mathematical Relationship between Pitch and Position for Stringed Instruments

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Applied Mathematics 2014年第10期5卷 1503-1507页

作者： Nan Yang Dawei Zhang Yanling Tian School of Mechanical Engineering Tianjin University Tianjin China School of Mechanical Engineering Tianjin University Tianjin China Tianjin Key Laboratory for Control Theory & Applications in Complicated Systems Tianjin China School of Mechanical Engineering Tianjin University of Technology Tianjin China

In this paper, a simple mathematical model was proposed to answer such a question: what’s the relationship between the finger pressing position and the corresponding pitch for stringed instruments? Furthermore, we compared the theoretical results with measurement results which were obtained from a guitar to prove that the model we propose is reliable. Result shows that relative errors of theoretical results and measurement results are from 0.18% to 1.8%. The mathematics model is more concise, direct and clear than physical model.

关键词： Stringed Instrument Fret Pitch Mathematical Model

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Integral sliding mode output control of delta operator systems with insensitivity to sampling time jitter

Integral sliding mode output control of delta operator syste...

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第26届中国控制与决策会议

作者： Li-Ying Hao Hui Li Xiang-Gui Guo Jinyan Song Hongshuai Pang College of Information Engineering Dalian Ocean University Information Science and Technology College Dalian Maritime University Tianjin Key Laboratory for Control Theory & Applications in Complicated System School of Electrical EngineeringTianjin University of Technology

This paper focuses on integral sliding mode output control for linear delta operator systems with insensitivity to sampling time jitter in the case of small sampling times along with unmatched disturbances. A delta-domain integral sliding mode sector can be reached without chattering by employing a novel reaching law to avoid the inherent numerical ill-condition resulting from using the traditional shift-domain model at high sampling rates. Parameter sensitivity function of the transfer function with respect to sampling time jitter is also defined to mitigate the effect of sampling time jitter which may cause significant degradation of the overall system performance. By combining the novel bounded real lemma for delta operator using integral sliding mode adaptive control approach, a method of designing output feedback controller with insensitive to sample time jitter based on linear matrix inequality(LMI) is proposed, where the corresponding reaching law proposed is able to reduce the chattering. Finally, a numerical example is presented to show the effectiveness of the proposed method.

关键词： Sensitivity,sampling time jitter,integral sliding mode control,delta operator,dynamic output feedback controller,linear matrix inequality(LMI)

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Integral sliding mode fault-tolerant control against actuator nonsymmetric deadzone and unmatched disturbances

Integral sliding mode fault-tolerant control against actuato...

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第26届中国控制与决策会议

This paper focuses on an integral sliding mode control(ISMC) algorithm for the fault-tolerant control of linear continuous multi-input systems with non-smooth nonsymmetric actuator dead-zone failure and unmatched *** dead-zone is first modeled as a combination of a line and a disturbance-like term. And the novelty of the paper lies in that the treatment of the deadzone failure based on the simplified dead-zone model. The bounded disturbancelike term which enters the state equation at the same point as the control input can be rejected completely by ISMC technology, and the linear part of the deadzone will be compensated by state feedback controller based on linear matrix inequality(LMI). It is worth pointing out that once the system is in the sliding mode, the proposed integral sliding mode control law ensures that the dead zone is compensated completely and sustains the better nature of performing unmatched perturbations attenuation than utilizing H∞ control analytical technique alone. Finally, the feasibility of our proposed algorithm is illustrated by using a numerical example.

关键词： Integral sliding mode control,dead-zone failure,unmatched disturbance,H∞ control,linear matrix inequality(LMI)

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Low sensitivity memory control for linear time-delay systems with mixed-H∞ norm sensitivity minimization

Low sensitivity memory control for linear time-delay systems...

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International Conference on Mechatronics and control (ICMC)

作者： Xiang-Gui Guo Ya-Zhou Li Li-Ying Hao Tianjin Key Laboratory for Control Theory & Applications in Complicated Systems Tianjin University of Technology Tianjin School of Electrical Engineering Tianjin University of Technology Tianjin College of Information Engineering Dalian Ocean University Dalian Liaoning China

ISBN: (纸本)9781479925391

This paper deals with the problem of designing low sensitivity memory H ∞ state-feedback controllers for linear discrete-time systems with time delay. The time-delay factors are known constant scalar. The aim of this paper is to design a memory low sensitivity sate feedback control law such that the closed-loop system is asymptotically stable for all admissible time-delays and multiplicative controller coefficient variations in the framework of coefficient sensitivity theory. A new sufficient condition based on linear matrix inequality (LMI) technique for the existence of such controllers is formulated.

关键词： Conferences Mechatronics

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Grid-connection control of PV power generation in Micro-grid

Grid-connection control of PV power generation in Micro-grid

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2nd International Conference on Advances in Mechanics Engineering, ICAME 2013

作者： Zhao, Hui Wang, Han Wang, Hong Jun Yue, You Jun Tianjin Key Laboratory for Control Theory and Applications in Complicated System Tianjin University of Technology Tianjin China

ISBN: (纸本)9783037858288

In the analysis of PV cells mathematical model based on the use of the admittance incremental method with constant voltage integrated maximum power point tracking (MPPT) method. In the micro-grid, PV power generation using the constant power (PQ) control, to achieve active and reactive power control. Matlab / Simulink simulation environment model of PV cells and an integrated method for maximum power point tracking, simulation results show that the synthesis method faster track to the maximum power point of the PV installations. Established PQ control model of micro-grid which based on the SVPWM, PV installations connected to the grid after the LCL filter, simulations show that the tracking of active and reactive power through the PQ control. © (2013) Trans Tech Publications, Switzerland.

关键词： MATLAB

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