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作者： Silva, Leonardo Adolpho Justino, Julio De Jesus Cardoso, Braz Pujatti, Fabricio Dept. of Telecommunication and Mechatronic Engineering Federal University of S. Joao Del Rei Rodovia MG443 km7 Branco Minas Gerais Brazil Graduate Program in Electrical Engineering Federal University of Minas Gerais Av. Antônio Carlos 6627 Belo Horizonte31270-901 Brazil Dept. of Mechanical Engineering Federal University of Minas Gérais Av. Antônio Carlos 6627 Belo Horizonte31270-901 Brazil

ISBN: (纸本)9781479940325

Many professional or daily activities demand load displacement by human arms or by human powered vehicles. Those activities may cause muscle-skeleton diseases even in load carrying professionals as in people carrying their daily objects. In the field of robotics, the research developments to help people at those activities are made through human-robot cooperation systems actuated by servo drives. Due to the cost of those drives, many people are not able to acquire the robots and so they are prohibited from getting the associated health benefits. To promote robot-aided solutions, this paper presents the design and implementation of a load carrier human-robot cooperation system, which is built through an electrical load cart and driven by frequency inverter and induction motor. The robot controller is implemented by a force regulation structure which allows the conductor to set the mechanical trajectories through the multiplication of the force applied by his/her arms. Since the arms have a higher positioning bandwidth than the conductor's legs, the controller dynamic response is tuned with human leg dynamics in mind, so as to increase the operational safety. The paper presents details of mounting, firmware design and measurements to show the robot performance. © 2014 IEEE.

关键词： Cost effectiveness

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Conceptual design of semi-automatic wheelbarrow to overcome ergonomics problems among palm oil plantation workers

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IOP Conference Series: Materials Science and engineering 2015年第1期100卷

作者： N S M Nawik B M Deros M N A Rahman E H Sukadarin N Nordin S B M Tamrin S A Bakar M L Norzan Department of Mechanical and Materials Engineering Faculty of Engineering and Built Environment Universiti Kebangsaan Malaysia Malaysia Occupational Safety and Health Program Faculty of Technology Engineering Universiti Malaysia Pahang Malaysia Department of Technology Management School of Technology Management and Logistic Universiti Utara Malaysia Malaysia Department of Community Health Faculty of Medicine and Health Sciences Universiti Putra Malaysia Malaysia School of Mechatronic Engineering Universiti Malaysia Perlis (UniMAP) Malaysia

An ergonomics problem is one of the main issues faced by palm oil plantation workers especially during harvesting and collecting of fresh fruit bunches (FFB). Intensive manual handling and labor activities involved have been associated with high prevalence of musculoskeletal disorders (MSDs) among palm oil plantation workers. New and safe technology on machines and equipment in palm oil plantation are very important in order to help workers reduce risks and injuries while working. The aim of this research is to improve the design of a wheelbarrow, which is suitable for workers and a small size oil palm plantation. The wheelbarrow design was drawn using CATIA ergonomic features. The characteristic of ergonomics assessment is performed by comparing the existing design of wheelbarrow. Conceptual design was developed based on the problems that have been reported by workers. From the analysis of the problem, finally have resulting concept design the ergonomic quality of semi-automatic wheelbarrow with safe and suitable used for palm oil plantation workers.

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Study of the Aerodynamic Characteristic and Flight Trajectories in a Tail Fin-stabilized Projectile with Different Shapes

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Procedia engineering 2014年 79卷 108-113页

作者： Chun-Chi Li Chang-Sheng Tai Cheng-Chyuan Lai Shang-Min Fu Yen-Chun Tsai Department of Mechatronic Energy and Aerospace Engineering Chung Cheng Institute of Technology NDU No.75 Shiyuan Rd. Daxi Township Tauyuan County 33551 Taiwan ROC Master Program of Mechanical Engineering Chung Cheng Institute of Technology NDU No.75 Shiyuan Rd. Daxi Township Tauyuan County 33551 Taiwan ROC

This study adopted computational fluid dynamics (CFD), low speed wind tunnel experiments and the MATLAB/Simulink control software to analyze the aerodynamic attributes of a tail fin-stabilized projectile with two different shapes (prototype and improved type) and subsequently simulate its flight trajectory with four degrees of freedom under a flight condition 0.6 Mach. Comparing the CFD calculation results with the revised experiment data using the Karman-Tsien Rule showed that the aerodynamic coefficients CD, CL, CM and CMα were similar within an angle of attack between -8°∼8°. The two types of projectile further demonstrated excellent aerodynamics within an angle of attack between -8°∼8°, maintaining stable flight. Furthermore, comparing the four-degrees-of-freedom simulation results with data from the firing table showed that the maximum height difference of trajectories at varying angles of elevation (mil) ranged under 4.68%, and the difference in the firing range distance ranged under 5.72%. Compare two types of projectiles launched at a 45° in elevation, the improved type increased 26.83% range distance than prototype. To reduce the costs of field testing, this study establishes a method to design aerodynamic systems, analyze and compare flow fields, and simulate flight trajectories.

关键词： low-speed wind tunnel CFD aerodynamics MATLAB/Simulink flight trajectory control.

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Properties of Palm Pressed Fibre for Metal Forming Lubricant Applications

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Procedia engineering 2013年 68卷 130-137页

作者： S.M. Hafis M.J.M. Ridzuan Alina Rahayu Mohamed R.N. Farahana B. Nor Fatin S. Syahrullail Mechanical Engineering Program School of Mechatronic Engineering Universiti Malaysia Perlis Pauh Putra Campus 02600 Arau Perlis Malaysia School of Bioprocess Engineering Universiti Malaysia Perlis 02600 Jejawi Perlis Malaysia School of Material Engineering Universiti Malaysia Perlis 02600 Jejawi Perlis Malaysia Faculty of Mechanical Engineering Universiti Teknologi Malaysia 81310 UTM Skudai Johor Malaysia

During the last few years, special attention has been paid to the protection of the environment from pollution caused by lubricants. Green lubricants are in demand for many industrial activities. Present work focuses on palm pressed fibre (PPF), which is the biomass waste generated during the production of palm oil. It has a great potential source of lubricant by producing the PPF oil by pyrolysis. As the availability of PPF is abundant and the PPF waste generates greenhouse gases, the present investigation aims at pyrolysis experiments and evaluating the yield and functional properties of the oil produced. Experimental studies on catalytic pyrolysis technology using a tubular reactor on PPF oil was performed at temperature of 450 °C, which gave oil product yields of 44.1 percent. Viscosity of the PPF oil as a function of temperature was measured at different temperatures ranging from 25 °C to 50 °C. The result showed that the viscosity of the oils decreases remarkably with increases in temperature. Finally, the PPF oil obtained from the pyrolysis process was tested as a lubricant and compared with palm olein (PO) in cold work drawing process. The findings revealed that PPF can perform as effectively as existing lubricants like PO in metal forming process.

关键词： Tribology lubricant metal forming palm pressed fibre pyrolysis

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Evaluation of a lumbosacral orthosis in flexion and extension movements of lumbar spine using Cobb method

Evaluation of a lumbosacral orthosis in flexion and extensio...

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2012 International Conference on Biomedical engineering, ICoBE 2012

作者： Razak, N.A. Abu Osman, N.A. Biomedical Electronic Program School of Mechatronic Engineering Universiti Malaysia Perlis Malaysia Department of Biomedical Engineering Faculty of Engineering University of Malaya Kuala Lumpur Malaysia

ISBN: (纸本)9781457719899

Lumbosacral orthosis (LSO) is a type of spinal orthosis that has been recommended for three basic purposes;abdominal support, pain management, and motion or positional control [1]. Even though the scientific evidence of its clinical effectiveness is controversial, the use of LSO increases due to a high satisfaction rate among patients with low back pain [2]. By implementation of radiographic technique, objectives of this study are to evaluate the changes of lumbar lordosis in flexion and extension of trunk movements with and without wearing the LSO measured by Cobb technique and to correlate the value of lordotic angles in particular posture. Ten healthy men without any history of low back pain participated and a semi-rigid LSO was utilized. Lateral radiographs of spine images during neutral, flexion and extension postures were captured, with and without orthosis. The lumbar lordosis angle was determined using four lines Cobb technique on each of printed lateral radiographic images. Statistical analysis was completed using Statistical Package for the Social Sciences (SPSS). Mean of lumbar lordosis for maximum trunk flexion with and without orthosis is 12.2 and 16.4 respectively. Lordotic angles for extension are higher than flexion which is 51.7 for maximum trunk extension without orthosis and 54.6 for maximum trunk extension with orthosis. Present results indicate that the lumbar lordosis increased when the lumbosacral orthosis was used in both flexion and extension movements. © 2012 IEEE.

关键词： Health

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Evaluation of a lumbosacral orthosis in flexion and extension movements of lumbar spine using Cobb method

Evaluation of a lumbosacral orthosis in flexion and extensio...

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International Conference on Biomedical engineering (ICoBE)

作者： N.A. Razak N.A. Abu Osman Biomedical Electronic Program School of Mechatronic Engineering Universiti Malaysia Pedis Perlis Malaysia Department of Biomedical Engineering Faculty of Engineering University of Malaya Kuala Lumpur Malaysia

Lumbosacral orthosis (LSO) is a type of spinal orthosis that has been recommended for three basic purposes; abdominal support, pain management, and motion or positional control [1]. Even though the scientific evidence of its clinical effectiveness is controversial, the use of LSO increases due to a high satisfaction rate among patients with low back pain [2]. By implementation of radiographic technique, objectives of this study are to evaluate the changes of lumbar lordosis in flexion and extension of trunk movements with and without wearing the LSO measured by Cobb technique and to correlate the value of lordotic angles in particular posture. Ten healthy men without any history of low back pain participated and a semi-rigid LSO was utilized. Lateral radiographs of spine images during neutral, flexion and extension postures were captured, with and without orthosis. The lumbar lordosis angle was determined using four lines Cobb technique on each of printed lateral radiographic images. Statistical analysis was completed using Statistical Package for the Social Sciences (SPSS). Mean of lumbar lordosis for maximum trunk flexion with and without orthosis is 12.2° and 16.4° respectively. Lordotic angles for extension are higher than flexion which is 51.7° for maximum trunk extension without orthosis and 54.6° for maximum trunk extension with orthosis. Present results indicate that the lumbar lordosis increased when the lumbosacral orthosis was used in both flexion and extension movements.

关键词： Pain Back Spine Radiography Muscles Biomechanics Belts

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Sit to stand motion analysis based on Body Mass Index

Sit to stand motion analysis based on Body Mass Index

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IEEE EMBS Conference on Biomedical engineering and Sciences (IECBES)

作者： Nurul Maisarah Kamaruddin Norsyahidah Mat Arif Mohamad Shahril Salim Electronic Engineering (Medical) Program Electrical Engineering Department Polytechnic Sultan Salahuddin Abdul Aziz Shah Shah Alam Selangor Malaysia Biomedical Electronic Engineering Program School of Mechatronic Engineering Universiti Malaysia Perlis Arau Perlis Malaysia

This paper presents the kinetics analysis for different sit to stand (STS) strategies of different Body Mass Index (BMI) subjects. Five camera motion analysis system and Bertec force plate in conjunction with QTM (Qualisys Track Manager) software were used. As a result, the minimum force at lower limb is discovered using the upper seat using arm while STS. Thus, it helped people in developing the rehabilitation that suitable for Malaysian to perform the sit to stand exercise.

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FPGA-based image processing for omnidirectional vision on mobile robots 11

FPGA-based image processing for omnidirectional vision on mo...

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24th Symposium on Integrated Circuits and Systems Design, SBCCI2011

作者： Yudi Mori, Jones Mũoz Arboleda, Daniel Arias Garcia, Janier Llanos Quintero, Carlos Motta, José Mechatronic Systems Graduate Program - PPMEC Department of Mechanical Engineering University of Brasilia 70910-900 Brasilia D.F. Brazil

ISBN: (纸本)9781450308281

Omnidirectional vision systems have been used for mobile robots localization and navigation, taking advantage of a panoramic view for detecting objects. This paper presents a pipelined hardware architecture for image processing using a low cost omnidirectional vision system, which was calibrated using a three-order polynomial interpolation. An Altera Cyclone II FPGA device was used for implementing the hardware architectures, which have been described in both VHDL and Verilog hardware description languages. The entire system is composed of a spherical mirror, an 800x480 pixels camera connected to the FPGA, a spatial convolution filter for edge enhancement, a hardware architecture for estimating the distance of real objects and a touch screen display as user interface. Synthesis results point out that the image processing algorithms are effectively implemented in hardware whereas test results demonstrate that the proposed hardware architectures in FPGAs are suitable for mobile robot applications in which the distance among objects or other robots must be computed. Execution time results demonstrate that the proposed hardware architecture achieves a speed-up factor of 61 in comparison with a desktop software solution based on a xPC Target real time operating system. © 2011 ACM.

关键词： Field programmable gate arrays (FPGA)

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Development of Arm Device to Investigate the Elbow Joint Motion

Development of Arm Device to Investigate the Elbow Joint Mot...

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2011 World Congress on engineering and Technology(CET 2011)

作者： M.S.Salim N.M.Khair S.Yahya M.F.Mahmud Biomedical Electronic Engineering Program School of Mechatronic Engineering Universiti Malaysia Perlis Malaysia

The electronic measurement of the angle between two planes or movement performed by using the device called *** this research,the potentiometer electrogoniometer has been developed to investigate the elbow joint *** device will detect the flexion and extension movement of the arm which more specifically the angles of movement occur at the *** principle is that work as a hinge joint that is similar to joint of an *** rotary or linear motion of change detected that hinge due to resistance and *** data are calculated and done through a microcontroller and finally shown in real time using a liquid crystal display(LCD)in *** prototype of device will be developed with range of motion from 0 until *** reliability of device tested using Kinovea software,which the angle data from potentiometer electrogoniometer should be same with angle data using *** study of 10 subjects showed that the value of arm device is slightly different with Kinovea *** main advantage is reliability and capability, accuracy,comfortable and simple device has been developed.

关键词： Potentiometer,electrogoniometer,elbow joint, accuracy,sensor

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3-D Simulation of external cooling of aero-optical side window

3-D Simulation of external cooling of aero-optical side wind...

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2011 IEEE 3rd International Conference on Communication Software and Networks, ICCSN 2011

作者： Li, Chun-Chi Lin, Yi-Chan Hsieh, Ming-Chun Dept. of Mechatronic Energy and Aerospace Engineering Chung Cheng Institute of Technology Dasi Township 335 Taoyuan County Taiwan Master Program of Mechanical Engineering Chung Cheng Institute of Technology Dasi Township 335 Taoyuan County Taiwan

ISBN: (纸本)9781612844855

Under hypersonic flow environment, the aero-optical side window of optical guidance missile will trigger aero-thermodynamic effects causing high heat and cracks to optical windows which eventually leads to failure of optical windows. This study uses computational fluid dynamic as a tool to simulate hypersonic flow, optical side window cooling and jet flow design. Simulation results show that cooling effect with surface temperature less than 500K can be achieved when the external cooling jet flow reaches 0.125kg/s, thus meeting the needs of weight-bearing projectile. Since the optical side windows are located at leeward, greater angle of attack (AOA 30) will result in a better cooling effect of the flow field under the condition with the present of AOA. Besides, the groove temperature for optical side window is similar to the temperature of cooling jet. © 2011 IEEE.

关键词： Angle of attack

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