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Gait dynamic stability evaluation on inclined surfaces for inverted or everted feet walking

Fuss und Sprunggelenk 2024年第4期22卷 254-268页

作者： Raza, Anam Mahmood, Imran Sultana, Tayyaba Sultana, Salma Dehghani-Sanij, Abbas A. Department of Zoology Government College University Faisalabad Pakistan Mechatronics and Control Engineering Department Faisalabad Campus UET Lahore Pakistan Institute of Design Robotics and Optimisation School of Mechanical Engineering University of Leeds United Kingdom

Background: This study investigates gait dynamic stability on inclined surfaces while walking with foot rotational impairments such as everted and inverted feet. Walking stability is assessed during gait transitional periods i.e. weight loading and unloading phases. Methods: Foot rotational impairments (eversion and inversion) are imitated using wedged foot insoles. A total of ten healthy subjects performed five trials for each of the inverted, everted, and normal feet conditions. Experimental data was collected using a twelve-camera motion capture system and a force plate installed on an inclined platform. Lower limb joint kinematics were computed in Visual-3D motion analysis software to evaluate the degree of foot rotational impairments. Gait dynamic stability was assessed by analysing the centre of mass and centre of pressure signals as neuromechanical input and output responses respectively. Both signals were modelled in time and frequency domains and stability margins were quantified by applying Nyquist and Bode (N&B) methods from control engineering theory. Results: Stability margins quantified from N&B methods illustrated the loading phase as stable and the unloading phase as unstable gait transitions. During the loading phase, both rotational impairments illustrated a decrease in stability (p < 0,05) for the ramp ascent walk and an increase in stability (p < 0,05) for the ramp descent walk. However, there was no difference observed for the respective unloading phases. Results from neuromotor outputs (CoP-velocity) illustrated a strong interlimb correlation (p < 0,001) during gait transitional periods, implying a compensatory stability interaction exists between opposite limbs. Further, stabilities quantified from outputs were found greater in magnitudes than the instability quantified from inputs illustrating the robustness of neuromotor balance control. Conclusions: Results support the hypothesis that gait stability gets affected while walking with rotation

关键词： Balance control Foot Gait stability Inclined walk Rotational impairments

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Automatic Anti-Swing Gantry Crane Based on Gradient Descent Optimization Proportional Integrated Derivative (PID): A Comparison Simulation and Real Experiment

Automatic Anti-Swing Gantry Crane Based on Gradient Descent ...

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2023 International Conference on Electrical engineering and Informatics, ICEEI 2023

作者： Qadri, Munzir Harjanto, Danang Karuna Miharja, Jonathan Astuti, Winda Mariana, Yosica Tan, Sofyan Solihin, Mahmud Iwan University of Muhammadiyah Jakarta Engineering Faculty Mechanical Engineering Department Jakarta10510 Indonesia Binus Aso School of Engineering Bina Nusantara University Automotive and Robotics Program Computer Engineering Department Jakarta11480 Indonesia Binus Aso School of Engineering Bina Nusantara University Product Design Program Industrial Engineering Department Jakarta11480 Indonesia Ucsi University Departement of Mechanical & Mechatronics Engineering Kuala Lumpur Malaysia

ISBN: (纸本)9798350381290

Transporting payload with precise swing angles and transfer times poses a challenging task in building construction, which is why gantry crane systems are extensively utilized. Various control strategies, including open-loop and closed-loop systems, have been proposed to tackle this issue. However, most of these controllers rely on a model and parameters specific to the crane system, making the process of modeling and parameter identification complex and time-consuming. To address this challenge, this work presents a practical and simulation control method for automatic gantry cranes, which is evaluated simulation and experimentally. The lab-scale Gantry crane is developed in this work, which consists of mechanical and electrical parts. Proportional Integral and Derivative (PID) and Proportional Derivative (PD) controllers which applied optimization method are implemented in the electrical part of the system. The PID and PD controller applied in controlled the position and swing angle, respectively. The Gradient Decent optimization method is the best optimization method in determining the parameter of the controller, since it has the best simulation performance in the output of the system. The experimental result is developed and compared between simulation and lab-scale Gantry crane hardware implementation part. The performance of experimental results is shown appropriately approaching the performance of the simulation result, with the approximately settling time. © 2023 IEEE.

关键词： Proportional control systems

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Untethered Micro/Nanorobots for Remote Sensing:Toward Intelligent Platform

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Nano-Micro Letters 2024年第2期16卷 450-483页

作者： Qianqian Wang Shihao Yang Li Zhang Jiangsu Key Laboratory for Design and Manufacture of Micro‑Nano Biomedical Instruments School of Mechanical EngineeringSoutheast UniversityNanjing 211189People’s Republic of China Department of Mechanical and Automation Engineering The Chinese University of Hong KongShatinHong Kong 999077People’s Republic of China Chow Yuk Ho Technology Centre for Innovative Medicine The Chinese University of Hong KongShatinHong Kong 999077People’s Republic of China T Stone Robotics Institute The Chinese University of Hong KongShatinHong Kong 999077People’s Republic of China Department of Surgery The Chinese University of Hong KongShatinHong Kong 999077People’s Republic of China

Untethered micro/nanorobots that can wirelessly control their motion and deformation state have gained enormous interest in remote sensing applications due to their unique motion characteristics in various media and diverse *** are developing micro/nanorobots as innovative tools to improve sensing performance and miniaturize sensing systems,enabling in situ detection of substances that traditional sensing methods struggle to *** the past decade of development,significant research progress has been made in designing sensing strategies based on micro/nanorobots,employing various coordinated control and sensing *** review summarizes the latest developments on micro/nanorobots for remote sensing applications by utilizing the self-generated signals of the robots,robot behavior,microrobotic manipulation,and robot-environment *** recent studies and relevant applications in remote sensing,we also discuss the challenges and future perspectives facing micro/nanorobots-based intelligent sensing platforms to achieve sensing in complex environments,translating lab research achievements into widespread real applications.

关键词： Micro/nanorobot Remote sensing Wireless control Self-propulsion Actuation at small scales

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The Effect of Coil Geometry and Winding Method on the Electromagnetic Launcher Performance 48

The Effect of Coil Geometry and Winding Method on the Electr...

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48th Annual Conference of the IEEE Industrial Electronics Society, IECON 2022

作者： Mohamed Abdo, Mohamed Magdy Fanni, Mohamed Miyashita, Tomoyuki Ahmed, Sabah Mohamed Egypt-Japan University of Science and Technology Mechatronics and Robotics Department Alexandria Egypt Ain Shams Univeristy Faculty of Engineering Engineering Physics and Mathematics Department Cairo Egypt Mansoura University Production Engineering and Mechanical Design Department Mansoura Egypt Waseda University School of Creative Science and Engineering Department of Modern Mechanical Engineering Tokyo Japan Assuit University Electrical Engineering Department Assuit71515 Egypt

ISBN: (数字)9781665480253

ISBN: (纸本)9781665480253

Electromagnetic launchers become spread in many applications. This type of launcher is used to accelerate a slug made of ferromagnetic material. Many researchers compete to enhance the performance of this type. The launcher consists of simple components such as a capacitor bank, electronic switches, launcher coil, and charging circuit. In this paper, the authors have physically built the launcher system and reinforced the launcher performance by changing the winding method and making the trigger coil in a conical shape to reduce the deceleration effect of the last half of the trigger, this modification has proven its superiority over the straight coil. © 2022 IEEE.

关键词： Electromagnetic launchers

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Development of a Software for Laser-Based Micromachining of Piezoceramic Microactuators 1

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AUN/SEED-Net Joint Regional Conference in Transportation, Energy, and Mechanical Manufacturing engineering, RCTEMME 2021

作者： Nguyen, Ha Xuan Nguyen, Hung Anh Department of Machine Design and Robotics School of Mechanical Engineering Hanoi University of Science and Technology No. 1 Dai Co Viet Hai Ba Trung Hanoi Viet Nam Department of Mechatronics Engineering Faculty of Mechanical Engineering Thuy Loi University No. 175 Tay Son Dong Da Hanoi Viet Nam

ISBN: (数字)9789811919688

ISBN: (纸本)9789811919671

Laser-based micromachining is often applied to the fabrication of piezoceramic microactuators. In fact, the manual generation of a G-code file for the micromachining of such microactuators is very hard work. In this work, a CAM software for the laser-based micromachining of piezoceramic microactuators was developed. The software was built using C++ and the OpenCV library with Microsoft Visual Studio 9.0. The software has three main classes, including ReadDXF, DrawDXF, and MakeGcode. ReadDXF and DrawDXF were developed to read and display DXF data of the design of fabricated parts in an image for further processing. MakeGcode was built for generating G-code, which is then included in the main program of the NView for running the machine. Robust algorithms were developed so that the software could read complex designs without any failure. Optimization of the toolpath, which can improve machine productivity and lifetime service, was introduced. Results and experimental implementations show that our software can efficiently be used to machine piezoceramic microactuators. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Laser machining Microactuators Piezoceramic

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Conceptual design and Kinematic Analysis of Hybrid Parallel Robot for Accurate Position and Orientation

Conceptual Design and Kinematic Analysis of Hybrid Parallel ...

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SICE Annual Conference

作者： K. M. Asy Ahmed B. Zaky Haitham El-Hussieny Hiroyuki Ishii Mahmoud Elsamanty Mechatronics and Robotics Department School of Innovative Design Engineering Egypt Japan University for Science and Technology Alexandria Egypt Production and Mechanical Design Engineering Department Faculty of Engineering Menoufia University Computer Science and Information Technology Programs (CSIT) Egypt Japan University for Science and Technology Alexandria Egypt Electrical Department Faculty of Engineering at Shoubra Benha University Cairo Egypt School of Creative Science and Engineering Waseda University Japan Mechanical Department Faculty of Engineering at Shoubra Benha University Cairo Egypt

The proposed work presents an innovative hybrid parallel robot, combining a delta robot with a spherical parallel manipulator (SPM) to achieve 6-DoF motion. The conceptual design was developed using SolidWorks, showcasing agile movement with required angles. A comprehensive electrical layout design was initiated for ensuring efficient system control, integrating various components such as actuators, sensors, and control units for seamless operation. A forward kinematic model was mathematically developed and implemented in MATLAB, generating trained data by simulating the robot’s motion for various input parameters. The trained data represents the robot’s position and orientation for different movement types, including linear, circular, pure, and mixed multiple orientation movements. The robot’s performance was evaluated using metrics such as position accuracy, orientation error, and response time. This study analyzed the robot’s kinematics for precise position and orientation control, conducting tests with square path and helix trajectory movements, as well as sudden and sinusoidal wave motor angle changes. Results demonstrated the robot’s platform moved with a pure roll angle, fixed yaw and pitch angles with repetitive roll angle changes, and a small range of roll and pitch angle with a yaw angle, achieving less than 0.2% error in position accuracy and orientation. These findings offer valuable insights for designing and controlling hybrid parallel robots for high-accuracy positioning, highlighting the importance of a well-designed electrical layout, a thorough understanding of the kinematic model, and rigorous performance evaluation for effective system control.

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Automatic Anti-Swing Gantry Crane Based on Gradient Descent Optimization Proportional Integrated Derivative (PID): A Comparison Simulation and Real Experiment

Automatic Anti-Swing Gantry Crane Based on Gradient Descent ...

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International Conference on Electrical engineering and Informatics, ICEEI

作者： Munzir Qadri Danang Karuna Harjanto Jonathan Miharja Winda Astuti Yosica Mariana Sofyan Tan Mahmud Iwan Solihin Mechanical Engineering Department Engineering Faculty University of Muhammadiyah Jakarta Jakarta Indonesia Computer Engineering Department Automotive and Robotics Program BINUS ASO School of Engineering Bina Nusantara University Jakarta Indonesia Industrial Engineering Department Product Design program BINUS ASO School of Engineering Bina Nusantara University Jakarta Indonesia Departement of Mechanical & Mechatronics Engineering UCSI University Kuala Lumpur Malaysia

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Correction to: On the use of adjoint gradients for time-optimal control problems regarding a discrete control parameterization

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Multibody System Dynamics 2023年第3期59卷 335-336页

作者： Lichtenecker, Daniel Rixen, Daniel Eichmeir, Philipp Nachbagauer, Karin TUM School of Engineering and Design Department of Mechanical Engineering Chair of Applied Mechanics Munich Institute of Robotics and Machine Intelligence (MIRMI) Technical University of Munich Munich Germany Institute of Mechanics and Mechatronics Vienna University of Technology Wien Austria Faculty of Engineering and Environmental Sciences University of Applied Sciences Upper Austria Wels Austria Institute for Advanced Study Technical University of Munich Garching Germany

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Adaptive PI-Based Fuzzy Logic Auto-Tuning Controller design and Implementation for Tactile Shape Display Device 6

Adaptive PI-Based Fuzzy Logic Auto-Tuning Controller Design ...

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6th International Conference on Advanced Control Circuits and Systems and 5th International Conference on New Paradigms in Electronics and Information Technology, ACCS/PEIT 2019

作者： Alsayed, Y.M. Abouelsoud, A.A. Fath Elbab, A.M.R. Cairo Egypt Mechatronics and Robotics Engineering Department School of Innovative Design Engineering Egypt-Japan University of Science and Technology Mechatronics and Robotics Engineering Department PO Box: 21934 New Borg El Arab City Alexandria Egypt Cairo University Dept. of Electrical Engineering Cairo Egypt Assiut University Dept. of Mechanical Engineering Assiut Egypt

ISBN: (纸本)9781728163543

Tactile displays have been proposed as a human-computer interface. Nowadays, it is utilised in hundreds of applications and a standard means of information presentation. Shape information display became essential to many surgical tasks (finding hidden anatomical features and locating tumours). There is a strong need for shape tactile display devices particularly for specialists who ought to feel the tissue shape and hardness amid laparoscopic surgeries. This paper describes the design and implementation of adaptive position controller for a tactile shape display device. The proposed display comprises of an cluster of 3×3 upward/downward free mobile pins based on SMA actuators. Each actuator is competent of creating a 5 mm uprooting as greatest. Due to the complex hysteresis and non-linear response of SMA actuators, a fuzzy logic auto-Tuner algorithm is constructed to create the PI controller gains adaptive. The suggested controller is implemented to control the shape display tactile system. The proposed controller present prevalent response over existing controllers in the survey from point of no steady state error, no overshoot, no chattering and minimized hysteresis. © 2019 IEEE.

关键词： Controllers

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Corrigendum to 'Foot trajectories and loading rates in a transfemoral amputee for six different commercial prosthetic knees: An indication of adaptability'[Medical engineering and Physics, Volume 68, June 2019, Pages 46-56]

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Medical engineering & physics 2024年 124卷 104030页

作者： Alireza Abouhossein Mohammed I Awad Hafiz F Maqbool Carl Crisp Todd D Stewart Neil Messenger Robert C Richardson Abbas A Dehghani-Sanij David Bradley Department of Ergonomics School of Public Health and Safety Shahid Beheshti University of Medical Sciences *** Tehran Iran Robotics Design and Optimisation Mechanical Engineering University of Leeds School of Mechanical Engineering Leeds LS2 9JT United Kingdom. Electronic address: a.abouhossein@leeds.ac.uk. Faculty of Engineering Ain Shams University Cairo Egypt. Department of Mechatronics & Control Engineering University of Engineering & Technology Lahore Faisalabad Pakistan. Robotics Design and Optimisation Mechanical Engineering University of Leeds School of Mechanical Engineering Leeds LS2 9JT United Kingdom. Institute Medical and Biological Engineering School of Mechanical Engineering University of Leeds Leeds LS2 9JT UK. School of Sport and Exercise Sciences University of Leeds Leeds LS2 9JT UK. Abertay University Bell Street Dundee DD1 1HG UK.

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