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检索条件"机构=Mechatronics Engineering and Automation College"

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ULTRA-SENSITIVE PHOTON SENSOR BASED ON SELF-ASSEMBLED NANOPARTICLE PLASMONIC MEMBRANE RESONATOR

ULTRA-SENSITIVE PHOTON SENSOR BASED ON SELF-ASSEMBLED NANOPA...

引用

IEEE International Conference on Micro Electro Mechanical Systems

作者： Xinghua Wang Kae Jye Si Jiong Yang Xuezhong Wu Qinghua Qin Wenlong Cheng Yuerui Lu College of Mechatronics and Automation National University of Defense Technology CHINA Department of Chemical Engineering Monash University AUSTRALIA Research School of Engineering Australian National University AUSTRALIA

ISBN: (纸本)9781509006090

In this paper, we demonstrate an ultra-sensitive photon sensor based on a membrane mechanical resonator for the first time, which consists of free-standing one-particle-thick super-lattice sheet of self-assembled nano-particles. Because of plasmon resonance, the membrane resonator has very strong light-matter interaction, which converts photos to heat at very high efficiency. Also, the organic-inorganic hybrid nature of the membrane owns an extremely photon-sensitive stiffness. Experimental results indicate that only under a low optical radiation power of 15 mW/cm~2, the resonator shows an obvious frequency shift of 40% (from 55.2 to 34.1 kHz), which is around two or three orders of magnitude higher than that for conventional mechanical resonators.

关键词： BASED SELF-ASSEMBLED membrane membrane Resonator Device Component Nanoparticles Sensors FREQUENCY SHIFT

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Robust and adaptive non-homogeneous higher order sliding mode control for a class of uncertain nonlinear systems 34

Robust and adaptive non-homogeneous higher order sliding mod...

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34th Chinese Control Conference, CCC 2015

作者： Li, Peng Ma, Jianjun Lina, Geng Zhiqiang, Zheng College of Mechatronics Engineering and Automation National University of Defense Technology Changsha China

ISBN: (纸本)9789881563897

An adaptive non-homogeneous higher order sliding mode control (HOSMC) method for a class of uncertain nonlinear systems is proposed in this paper. The HOSMC problem can be viewed as the finite time stabilization of a higher order input-output dynamic system with bounded uncertainties. Given a large initial tracking error, the proposed HOSMC algorithm provide fast convergence rate by using non-homogeneous finite time stabilization. In addition, the adaptive control method is employed to identify bounded uncertainties for eliminating the requirement of bounds needed in the conventional design. To solve the overestimation problem, equivalent control technique is used in this paper, and then the switching gain can be designed as a small constant. Numerical simulation on an omnidirectional mobile vehicle demonstrates the effectiveness of the proposed HOSMC algorithm. © 2015 Technical Committee on Control Theory, Chinese Association of automation.

关键词： Adaptive control Higher order SMC Non-homogeneous finite time stabilization

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Robust and Adaptive Non-homogeneous Higher Order Sliding Mode Control for a Class of Uncertain Nonlinear Systems

Robust and Adaptive Non-homogeneous Higher Order Sliding Mod...

引用

第三十四届中国控制会议

作者： LI Peng MA Jianjun Geng Lina Zheng Zhiqiang College of Mechatronics Engineering and Automation National University of Defense Technology

ISBN: (纸本)9781467374439

An adaptive non-homogeneous higher order sliding mode control(HOSMC) method for a class of uncertain nonlinear systems is proposed in this paper. The HOSMC problem can be viewed as the finite time stabilization of a higher order inputoutput dynamic system with bounded uncertainties. Given a large initial tracking error, the proposed HOSMC algorithm provide fast convergence rate by using non-homogeneous finite time stabilization. In addition, the adaptive control method is employed to identify bounded uncertainties for eliminating the requirement of bounds needed in the conventional design. To solve the overestimation problem, equivalent control technique is used in this paper, and then the switching gain can be designed as a small constant. Numerical simulation on an omnidirectional mobile vehicle demonstrates the effectiveness of the proposed HOSMC algorithm.

关键词： Higher order SMC,Adaptive control,Non-homogeneous finite time stabilization

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Contact force based compliance control for a trotting quadruped robot 27

Contact force based compliance control for a trotting quadru...

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27th Chinese Control and Decision Conference, CCDC 2015

作者： Xu, Jiaqi Lang, Lin Ma, Hongxu Wei, Qing College of Mechatronics Engineering and Automation National University of Defense Technology Changsha China

ISBN: (纸本)9781479970179

In these paper, a compliance control strategy based on force control for quadruped trot gait locomotion over unperceived rough terrain. To avoid interference of environmental disturbance and unknown model characters, a sliding mode based controller is designed to control the position/posture of the robot torso. The force distribution and control modules calculate desired contact force by eliminating interaction force between the stance legs. Simulations and experimental results demonstrate the effectiveness of our compliance control strategy as the quadruped robot successfully trotting over rough terrain. © 2015 IEEE.

关键词： Compliance Control Force Control Quadruped Robot Trot Gait

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Operation Management Framework Recovery of a Failed Autonomous-Steerable-Vehicle Storage and Retrieval System

Operation Management Framework Recovery of a Failed Autonomo...

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International Conference on Intelligent Human-Machine Systems and Cybernetics, IHMSC

作者： Xiaofeng Fu Yuzhu Bai College of Mechatronics Engineering and Automation National University of Defense Technology Changsha China Logistic Support Department of PLA Construction Engineering Research Institute Xi'an China College of Aerospace Science and Engineering National University of Defense Technology Changsha China

ISBN: (纸本)9781509007691

An autonomous-steerable-vehicle storage and retrieval system is derived from the traditional crane-based automated storage and retrieval system, performing higher space utilization than the latter and keeping high degree automation. In this system, several autonomous steerable vehicles move orderly at the same time to store or retrieve unit loads, which requires the structure of the rail network satisfying a series of safeness constraints. If some equipments of the system fail (such as rail deformed, vehicle broken down or lifter jamming), the structure of the rail network would be damaged, which leads to the operation management framework of the system cannot work. In this paper, the changes of the network due to the equipment fails of the system are analyzed, and the methods to recover the operation management framework of the system are discussed. In the methods, rebuilding the trunk rail cycle and degrading cut edge rails are employed to repair the structure of the rail network, which recover the operation management framework of the failed system, avoiding the system collapse.

关键词： Rails Vehicles Loading System recovery Jamming Portals automation

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Performance of Virtual Stimulus Motion based on the SSVEP-BCI

Performance of Virtual Stimulus Motion based on the SSVEP-BC...

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International Symposium on Computer, Consumer and Control

作者： Nannan Zhang Yang Yu Erwei Yin Zongtan Zhou Department of Automatic Control College of Mechatronics and Automation National University of Defense Technology National Key Laboratory of Human Factors Engineering China Astronaut Research and Training Center

ISBN: (纸本)9781509030729

In this paper, a brain-computer interface (BCI) paradigm based on steady-state visually evoked potentials (SSVEP) is used to determine the motion effects of stimulus targets on the classification accuracy and signal-to-noise ratio (SNR) in a virtual environment. Several paths including fixed and up/down with different speeds were set to look for performance differences. Experimental results show that the accuracy with moving targets is sometimes better than that for conventional non-moving targets, and even the relative SNR is improved with motion on occasions. This provides a basis for intensive study of the influence of moving objects on BCIs and target detection in real environments.

关键词： BCI SSVEP Stimulus motion

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A novel technique for detection and analysis of hunting in line-start IPM motors using stator current signature

A novel technique for detection and analysis of hunting in l...

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Conference Record of the IEEE Industry Applications Society Annual Meeting (IAS)

作者： S. F. Rabbi M. L. Little M. A. Rahman College of Mechatronics Engineering and Automation National University of Defense Technology Changsha China Systems Engineering EEE Division WYLE Aerospace Lexington Park MD USA Lexington Park MD USA

ISBN: (纸本)9781479983988

A line-start interior permanent magnet (LSIPM) motor is an induction-start synchronous motor. LSIPM motors are subjected to inherent hunting phenomena. Applications such as reciprocating pumps and compressors create periodic load torque variations; inducing hunting in the system. Hunting introduces torsional vibration in the motor drive system. This paper presents a novel technique using the stator current signature to detect hunting for LSIPM motors. Wavelet packet decomposition is applied to analyze the stator current signals for identifying the electrical signatures of hunting. Experimental investigations have been carried out for a 3-phase 4-pole 208V, 1HP LSIPM motor in order to validate the performance of the proposed method under various operating conditions. A 3-phase full bridge IGBT inverter drive is used to operate the motor at variable command frequencies. Based on experimental results, the proposed technique can successfully identify the hunting phenomenon without a vibration/position sensor. It can be applied for LSIPM motors operated by either fixed frequency direct supply or power electronics based variable speed drives.

关键词： Stators Magnetomechanical effects Demagnetization Frequency modulation

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A unified AC fault diagnosis method for analog circuits based on iterative simulation before test 12

A unified AC fault diagnosis method for analog circuits base...

引用

12th IEEE International Conference on Electronic Measurement and Instruments, ICEMI 2015

作者： Hu, Mei College of Mechatronics Engineering and Automation National University of Defense Technology Changsha410073 China

ISBN: (纸本)9781479976195

Based on the fault feature locus with the change of the component parameters in node-voltage space, a fault diagnosis method based on AC iterative simulation before test is proposed. The slope fault model under AC sinusoidal excitation is analyzed first, the idea of the AC iterative simulation before test and the fault diagnosis after test according to the parameter scanning simulation result is proposed;secondly, the procedure of the AC iterative simulation before test and fault diagnosis algorithm after test are both described. Furthermore, the test system of hardware and software for practical experiment is designed, mainly realized the signal acquisition and data analysis. The experiments of simulation and the practical circuit-board are implemented to validate the efficiency of the proposed method. © 2015 IEEE.

关键词： Failure analysis

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Adaptive non-homogeneous higher order sliding mode control without switching gain overestimation

Adaptive non-homogeneous higher order sliding mode control w...

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IEEE Conference on Control and Applications, CCA 2015

作者： Peng, Li Ma, Jianjun Lina, Geng Zheng, Zhiqiang College of Mechatronics Engineering and Automation National University of Defense Technology Changsha410073 China

ISBN: (纸本)9781479977871

Adaptive non-homogeneous higher order sliding mode control (HOSMC) scheme without switching gain over-estimation is proposed. Given a large initial tracking error, the proposed HOSMC algorithm provide fast convergence rate by using non-homogeneous finite time stabilization. In addition, the adaptive control method is employed to identify bounded uncertainties. To solve the overestimation problem, the equivalent control technique is used, and the switching gain can be designed as a small constant. Numerical simulation demonstrates the effectiveness of the proposed HOSMC algorithm. © 2015 IEEE.

关键词： Sliding mode control

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Indoor 3D scene reconstruction for mobile robots using Microsoft kinect sensor

Indoor 3D scene reconstruction for mobile robots using Micro...

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Chinese Control Conference (CCC)

作者： Jiang-Wei Li Ding-Fu Zheng Zhi-Hong Guan Chao-Yang Chen Xiao-Wei Jiang Xian-He Zhang College of Automation Huazhong University of Science and Technology Wuhan Hubei CN School of Information and Electrical Engineering Hunan University of Science and Technology Xiangtan Hunan CN College of Mechatronics and Control Engineering Hubei Normal University Huangshi CN

ISBN: (纸本)9781509009107

3D mapping for unknown environments is a crucial issue for mobile service robots, which has many important applications in navigation and path planning. In this paper, we use Microsoft kinect sensor mounted on a mobile robot to obtain 3D map. During the process, consistent frames of RGB-D data are captured and integrated. Iterative Closest Point (ICP) algorithm and incremental registration method are employed to perform the fine registration. Furthermore, we use OctoMap to store 3D map of octree representation, an efficient data structure. Finally, our results demonstrate the practical applicability and effectiveness of the proposed approach.

关键词： Three-dimensional displays Robot sensing systems Cameras Two dimensional displays Iterative closest point algorithm Mobile robots

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