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Silica nanochannel device for pH sensing based on surface charge density changes

Silica nanochannel device for pH sensing based on surface ch...

引用

2010 10th IEEE Conference on Nanotechnology, NANO 2010

作者： Lee, Sang Young Yoon, Sang Youl Lee, Kyeong-Hwan Yang, Sung Department of Nanobio Material and Electronics School of Information and Mechatronics GIST Korea Republic of Graduate- Program of Medical System Engineering Biomedical Micro/Nano Device Laboratory GIST Korea Republic of

ISBN: (纸本)9781424470334

This paper demonstrates a novel micro/nano fluidic device for continuous pH sensing of small fluid volumes. The working principle of the device is based on the change of the surface charge density within the silica nano channels with respect to the pH levels of the electrolyte. In order to measure pH levels of various solutions, AC potential is applied along the silica nanochannels which have 50 nm depth, 2 μm width, and 30 μm length. The running current along the nanofluidic channels is directly measured with respect to pH levels. It was found that the running current is inversely proportional to pH levels regardless of ion concentrations. ©2010 IEEE.

关键词： Electrolytes

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Design of a modular mobile multi robot system: ULGEN (universal-generative robot)

Design of a modular mobile multi robot system: ULGEN (univer...

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Asia-Pacific Conference on Intelligent Robot Systems (ACIRS)

作者： Hasan Ercan Pinar Boyraz Mechatronics Engineering Graduate Program Istanbul Technical University Istanbul Turkey

This paper presents a chain type, homogenous, mobile and modular multi-robot system (ULGEN) with self-assembly, self-reconfigurability, localization and high mobility capabilities. The main goal of the work is to have high maneuverable modules which can travel autonomously to explore areas individually and change their configuration when encountering obstacles. Once the optimal path is found by any of the individual modules, the whole system can re-assemble and follow that path. Five degrees of freedom and six active docking faces makes a single module adapt to different tasks, avoid obstacles, and reconfigure as a structure. A single module can achieve locomotion in crawler and differential drive modes on its wheels. The rotating central joint brings up different capabilities, such as - recovering itself when the module falls on its side, changing the locomotion type without reconfiguring the whole structure while switching from the skid-steering mode to 4-wheel steering mode or insect-like four-legged robot mode to mammal-like four-legged robot mode. In this paper, the hardware and software architectures are discussed. Locomotion types and possible configurations are modelled in a simulation environment. Finally, single module locomotion types are implemented on the prototype.

关键词： Wheels Robots Torque DC motors Connectors Sensors Self-assembly

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Vibration suppression in elastic drive systems using the immersion and invariance methodology

Vibration suppression in elastic drive systems using the imm...

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International Conference on Electric Power and Energy Conversion Systems (EPECS)

作者： Irfan Ullah Khan Rached Dhaouadi Mechatronics Engineering Graduate Program American University of Sharjah Sharjah UAE

This paper presents a new robust control methodology to suppress the torsional vibrations in flexible drive systems. The position control of a nonlinear Two-Mass-Model system (2MM) is designed using the Immersion and Invariance approach. First, appropriate mapping functions are derived to convert the total nonlinear 2MM system into an equivalent reduced order system with rigid dynamics. This reduced order system is used as a target system to design a position controller, which is based on the standard PI type control technique. Next through immersion and invariance, the reduced order controller is applied to the nonlinear 2MM system to suppress the torsional vibrations and yield an over-damped response similar to the target system. The control law derivation and stability analysis of the target system are described and discussed. Simulation and experiments using a 2MM drive system are used to validate the proposed control methodology.

关键词： Vibrations Robustness Servomechanisms Joints

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Nonlinear AutoRegressive eXogenous Artificial Neural Networks for predicting buckling restrained braces force

Nonlinear AutoRegressive eXogenous Artificial Neural Network...

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2012 8th International Symposium on mechatronics and its Applications, ISMA 2012

作者： Choudhary, Ibrahim Assaleh, Khaled AlHamaydeh, Mohammad American University of Sharjah Mechatronics Graduate Program United Arab Emirates American University of Sharjah Department of Electrical Engineering United Arab Emirates American University of Sharjah Department of Civil Engineering United Arab Emirates

ISBN: (纸本)9781467308625

This paper proposes a novel approach for modeling the nonlinear dynamic behavior of Buckling-Restrained Braces (BRBs). The proposed approach is based on a combination of two architectures of Artificial Neural Networks (ANN) namely, Nonlinear AutoRegressive eXogenous (NARX) ANN and feed forward back propagation (FFBP) ANN. The proposed model predicts (outputs) the brace force at a certain time from the brace deflection and its history and the history of the brace force. The data used in training and testing of the model is acquired from the experimental testing of four BRB specimens. The proposed model is trained on data from one specimen while tested against the rest to demonstrate its learning and generalization capability. Optimum values for various network parameters are selected empirically to obtain the best network performance. The results show that the prediction error for the peak response (maximum tensile/compressive force) lies within ±5% confidence interval for all cycles. © 2012 IEEE.

关键词： Neural networks

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Dynamic analysis of the proton exchange membrane fuel cell

Dynamic analysis of the proton exchange membrane fuel cell

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2nd International Conference on engineering and Technology Innovation 2012, ICETI 2012

作者： Tseng, Jung-Ge Hsiao, Der Ren Huang, Bo Wun Bachelor Program of Medical Engineering Cheng Shiu University Kaohsiung Taiwan Department of Technology Education National Science And Technology Museum Kaohsiung Taiwan Graduate Institute of Mechatronics Engineering Cheng Shiu University Kaohsiung Taiwan

ISBN: (纸本)9783037856123

Hydrogen energy fuel cell is one of the clean/green energy solutions for the environmental pollution, global warming, and petroleum energy shortage. This study investigates the dynamic characteristic of the green hydrogen energy fuel cell: Proton Exchange Membrane Fuel Cell (PEMFC). PEMFC has been adopted to be the power supplier of the vehicle, small train, etc. A lot of researchers aim on pure electrical property analysis. However, to put PEMFC power system on the road, some mechanical properties of the system should also been examined. In this paper, the dynamic characteristic of a single PEMFC is studied. A single PEMFC is set up and measured for the time and frequency response. Several fundamental modes are found experimentally which should be avoided during operation period of PEMFC especially in a moving vehicle. © (2013) Trans Tech Publications, Switzerland.

关键词： Frequency response

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Nonlinear reduced order observer design for elastic drive systems using invariant manifolds

Nonlinear reduced order observer design for elastic drive sy...

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International Conference on mechatronics (ICM)

作者： Irfan Ullah Khan Rached Dhaouadi Mechatronics Engineering Graduate Program College of Engineering American University of Sharjah Sharjah UAE

This paper presents the design of a nonlinear reduced order observer to estimate the load position and speed of an elastic drive system. The reduced order observer is designed using the notion of invariant manifold. First, a manifold is defined in terms of the error dynamics. Then, the mapping functions are selected in such a way that the error dynamics become asymptotically stable at the equilibrium point. Simulation and experimental results are shown to validate the proposed methodology for a two mass model system.

关键词： Observers Manifolds Load modeling Design methodology Mathematical model Asymptotic stability Torque

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A Multi Soft-sensor Approach for the Development of Emergencies Detection Units on the Edge 6

A Multi Soft-sensor Approach for the Development of Emergenc...

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6th IEEE International Workshop on Metrology for Industry 4.0 and IoT, MetroInd4.0 and IoT 2023

作者： Oliveira, Franklin Costa, Daniel G. Assis, Flavio Silva, Ivanovitch Federal University of Bahia Graduate Program in Mechatronics Salvador Brazil University of Porto INEGI Faculty of Engineering Porto Portugal Federal University of Rio Grande Do Norte Department of Computer Engineering and Automation Natal Brazil

ISBN: (纸本)9798350396577

The adoption of multi-sensor hardware units to detect different types of emergencies in complex scenarios such as Industry 4.0 and Smart Cities is a recent development trend, which have demanded research efforts to optimize the way these units are assembled, configured, and deployed. However, although their expected advantages, usual multi-sensors emergency-oriented approaches may be constrained by the tight association between physical sensor devices and the emergency detection process. Therefore, this paper proposes an innovative approach to concurrently detect multiple emergencies exploiting the concept of soft-sensor modules, which are implemented on Emergency Detection Units (EDUs) as concurrent tasks along with a high-priority emergency alerting task. The soft-sensor concept defines physical sensors as ordinary input data streams, which will be processed according to the defined algorithms by each particular soft-sensor, allowing detection decisions to be performed on the edge. In order to support the practical exploitation of this concept, a formal specification based on Petri Nets is defined, modeling the concurrent operation of the tasks within an EDU. A proof of concept is also designed based on the affordable Raspberry Pi Pico microcontroller, demonstrating how the proposed approach would behave when two soft-sensors are implemented in a typical detection unit. © 2023 IEEE.

关键词： Industry 4.0

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Techniques of Indoor Positioning Systems (IPS): A Survey

Techniques of Indoor Positioning Systems (IPS): A Survey

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Advances in Science and engineering Technology International Conferences (ASET)

作者： Fares Alkhawaja Mohammad Jaradat Lotfi Romdhane Mechatronics Graduate Program College of Engineering American University of Sharjah Sharjah UAE

Indoor Localization has been a challenging task in robotics for years, due to the obstruction of the GPS signals. Although multiple techniques have been proposed, determining the best among them is still highly dependent on applications and no best solution is agreed on. One technique, researchers and developers are adopting -especially in the robotics field-, is the visual/inertial sensor fusion. However, the high number of these systems and their diversity, makes selecting the adequate one for an application a challenging task. This paper aims at presenting an exhaustive list indoor positioning techniques with more emphasis on visual/depth sensors, along with some recommendations for selected applications.

关键词： Robot sensing systems Cameras Receivers Global navigation satellite system Wireless fidelity Visualization

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Effect of mouth-opening levels on sound field gain in the ear canal 45

Effect of mouth-opening levels on sound field gain in the ea...

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45th International Congress and Exposition on Noise Control engineering: Towards a Quieter Future, INTER-NOISE 2016

作者： Xiao, Jimg-Hong Yu, Jen-Fang Lee, Kun-Che Chiu, Hsiu-Hui Graduate Institute of Medical Mechatronics Chang Gung University Taiwan Taiouan Interdisciplinary Otolaryngology Laboratory Chang Gung University Taiwan Ph.D. Program in Biomedical Engineering College of Engineering Chang Gung University Taiwan

The human ear canal can become deformed when the mouth opens and closes, changing the sound field in the external auditory canal. Thus, measuring the mandibular movement trajectory may provide a reference for identifying mouth-opening levels. The human ear canal can become deformed when the mouth opens and closes, changing the sound field in the external auditory canal. Thus, measuring the mandibular movement trajectory may provide a reference for identifying mouth-opening levels. The K7 system and a Frye Fonix 7000 sensor were used to perform several measurements of mouth-opening and -closing to obtain the mean maximal mouth opening level. The mandible was fixed at the 1/3, 2/3, and maximal mouth-opening levels. Subsequently, a 65-dB sweep tone, which is the sound pressure level of people talking at a normal level, was adopted as the sound stimulus to measure sound fields at 5, 10, 15, and 20 mm from the entrance of the external auditory canal. The stimulus frequencies of 200, 500, 1000, 2000, 4000, 6000, and 8000 Hz were noted. The differences in sound field gains at depths of 5, 10, 15, and 20 mm were analyzed for the various mouth-opening levels. The results show that except for the 1.70-dB decrease at a depth of 5 mm with an 8000-Hz stimulus frequency, the differences at the other depths and stimulus frequencies were within 1 dB. Thus, the mouth-opening levels will influence the gain in ear canal. © 2016, German Acoustical Society (DEGA). All rights reserved.

关键词： Acoustic fields

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System identification of magneto-rheological damper using group method of data handling (GMDH)

System identification of magneto-rheological damper using gr...

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2009 6th International Symposium on mechatronics and its Applications, ISMA 2009

作者： Assaleh, Khaled Shanableh, Tamer Kheil, Yasmeen Abu Department of Electrical Engineering American University of Sharjah United Arab Emirates Department of Computer Science and Engineering American University of Sharjah United Arab Emirates Mechatronics Graduate Program American University of Sharjah United Arab Emirates

ISBN: (纸本)9781424434817

In this paper Group Method of Data Handling (GMDH) technique is implemented and applied to the system identification problem of a Magneto-Rheological (MR) damper. GMDH networks are used to approximate the forward and inverse dynamic behaviors of a MR damper. The difficulty of this identification problem stems from the inherent hysteretic and highly nonlinear dynamics of MR dampers. The GMDH-based solution exhibits comparable identification accuracy in both the forward and inverse models as compared to state-of-the-art more computationally extensive solutions. © 2009 IEEE.

关键词： Inverse problems

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