Linear motion ≈ Linear motion
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A Motion Capturing and Energy Harvesting Hybridized Lower‐Limb System for Rehabilitation and Sports Applications Open
Lower‐limb motion monitoring is highly desired in various application scenarios ranging from rehabilitation to sports training. However, there still lacks a cost‐effective, energy‐saving, and computational complexity‐reducing solution for …
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Linear Summation of Repulsive and Attractive Serial Dependencies: Orientation and Motion Dependencies Sum in Motion Perception Open
Recent work from several groups has shown that perception of various visual attributes in human observers at a given moment is biased toward what was recently seen. This positive serial dependency is a kind of temporal averaging that explo…
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Design and Experimental Research of a Novel Stick-Slip Type Piezoelectric Actuator Open
A linear piezoelectric actuator based on the stick-slip principle is presented and tested in this paper. With the help of changeable vertical preload force flexure hinge, the designed linear actuator can achieve both large travel stick-sli…
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Motion Control of Cable-Driven Continuum Catheter Robot Through Contacts Open
Catheter-based intervention plays an important role in minimally invasive surgery. For the closed-loop control of catheter robot through contacts, the loss of contact sensing along the entire catheter might result in task failure. To deal …
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A Method for Simultaneously Measuring 6DOF Geometric Motion Errors of Linear and Rotary Axes Using Lasers Open
A novel method for simultaneously directly measuring six-degrees-of-freedom (6DOF) geometric motion errors of CNC machine tools was proposed, and a corresponding measurement system was developed. This method can not only be applied for mea…
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Characterizing motion types of<i>G</i>-band bright points in the quiet Sun Open
We study the motions of G band bright points (GBPs) in the quiet Sun to obtain the characteristics of different motion types. A high resolution image sequence taken with the Hinode/Solar Optical Telescope (SOT) is used, and GBPs are automa…
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Experimental and Numerical Studies of the Influence of Geometric Deviations in the Performance of Machine Tools Linear Guides Open
The main goal of this research work is to investigate and characterise the geometric accuracy and its effect on the performance of the guiding system in machine tools or CMMs. As geometric errors are one of the main sources of the volumetr…
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Development of a Blended Time-Domain Program for Predicting the Motions of a Wave Energy Structure Open
Traditional linear time-domain analysis is used widely for predicting the motions of floating structures. When it comes to a wave energy structure, which usually is subjected to larger relative (to their geometric dimensions) wave and moti…
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IMPROVING THE ACCURACY AND RELIABILITY OF AUTOMATIC VESSEL MOUTION CONTROL SYSTEM Open
Context. There were considered the issues of improving the accuracy and reliability of automatic vessel motion control systems in conditions of large deviations in sensors measurements during maneuvering and failures of sensors and actuato…
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Recent development of linear machine topologies and applications Open
Linear machines (LMs) produce linear motion without any intermediate transmission mechanisms, thus the whole electromechanical system has simple structure and its efficiency is high. Because of such merits, linear machines have been studie…
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Fractional-Order Adaptive Integral Hierarchical Sliding Mode Control Method for High-Speed Linear Motion of Spherical Robot Open
The development of the spherical robot to meet the requirements of high-speed and high-precision tasks is of great importance. In this study, a fractional-order adaptive integral hierarchical sliding mode controller (F-AIHSMC) is proposed.…
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Design of a linear-rotary ultrasonic motor for optical focusing inspired by the bionic motion principles of the earthworms Open
Multi-motor configuration of multi-DOF (degree of freedom) optical system is a major source of redundant structure, putting a limitation on the simple and miniaturized design. Thus, a novel two-DOF ultrasonic motor (USM) is proposed to pro…
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The dynamical motion of a gyroscope subjected to applied moments Open
In the present work, the problem of the dynamical motion of a rigid body close to Lagrange’s gyroscope under the effectiveness of a gyro moment vector, perturbing moments, and a Newtonian field is examined. An averaging system of the gover…
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RectMag3D: A Magnetic Actuation System for Steering Milli/Microrobots Based on Rectangular Electromagnetic Coils Open
Milli/microrobots benefit from their small size and can perform minimally invasive surgery in a limited tissue space and eliminate the need for fine operations such as thrombus, which not only reduces trauma to patients but also shortens t…
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Temperature reconstruction of infrared images with motion deblurring Open
Infrared images of an uncooled microbolometer camera can show significant blurring effects while recording a moving object. The electrical signal in the pixel of a microbolometer detector decays exponentially; hence, the moving object is m…
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An Alternative Parallel Mechanism for Horizontal Positioning of a Nozzle in an FDM 3D Printer Open
In 3D printer design, special care must be taken when choosing the print head positioning mechanism. Indeed, this choice has a significant influence on the manufacturing accuracy, printing speed, workspace characteristics, and total cost o…
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Linear manipulator: Motion control of an n-link robotic arm mounted on a mobile slider Open
Linear manipulators are versatile linear robotics systems that can be reprogrammed to accommodate product changes quickly and are flexible to meet unique requirements. Such robotic systems tend to have higher accuracy, making them the perf…
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A Plate Moving-Magnet Linear Generator Designed for Free-Piston Engines Open
Free-piston engine coupled with linear generator is a research hotspot in the field of novel vehicle mounted power generation devices. A plate moving-magnet linear generator (PMMLG) is proposed and designed for free-piston engines in this …
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Effects of Movement Speed and Magnetic Disturbance on the Accuracy of Inertial Measurement Units Open
This study evaluated the effects of motion speed and magnetic disturbance on the spatial orientation accuracy of an inertial measurement unit (IMU) on the hand. Thirteen participants performed six trials of a repetitive material transfer t…
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Improved machine tool linear axis calibration through continuous motion data capture Open
Machine tool calibration is becoming recognised as an important part of the manufacturing process. The current international standards for machine tool linear axes calibration support the use of quasi-static calibration techniques. These t…
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Hopping Light Vat Photopolymerization for Multiscale Fabrication Open
3D objects with features spanning from microscale to macroscale have various applications. However, the fabrication of such objects presents challenges to additive manufacturing (AM) due to the tradeoffs among manufacturable feature resolu…
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Simultaneous Measurement of 6DOF Motion Errors of Linear Guides of CNC Machine Tools Using Different Modes Open
Based on the prior work on the six degrees of freedom (6DOF) motion errors measurement system for linear axes, and for the different types of machine tools and different installation methods, this study used a ray tracing idea to establish…
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Modelling and Measurement of a Moving Magnet Linear Motor for Linear Compressor Open
For the purpose of efficiency improvement, a linear motor that performs a linear reciprocating motion can be employed to directly drive the piston in a reciprocating refrigeration compressor without crankshaft mechanism. This also facilita…
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Development of High-Acceleration Linear Motor to Realize Resource Saving and High Productivity Open
The use of linear motors has been rapidly increasing in recent years in response to the rising demand for drive mechanisms with higher speed and acceleration to improve the throughput of semiconductor production equipment, machine tools, a…
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Range-based underwater target localization using an autonomous surface vehicle: Observability analysis Open
In the field of marine robotics, the problem of range based underwater target localization can be defined as that of localizing an unknown - fixed or moving - target from a surface vehicle called the tracker, using range information availa…
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Accelerometry-Based Distance Estimation for Ambulatory Human Motion Analysis Open
In human motion science, accelerometers are used as linear distance sensors by attaching them to moving body parts, with their measurement axes its measurement axis aligned in the direction of motion. When double integrating the raw sensor…
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Low-inertia vacuum-powered soft pneumatic actuator coil characterization and design methodology Open
Recently developed soft pneumatic actuators (SPAs) powered by negative pressure have demonstrated great potential in the future of soft robotics for their high strength, intrinsic safety, low weight, and often simple design. The majority o…
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Development of a new flux switching transverse flux machine with the ability of linear motion Open
This paper proposes a new rotary flux switching transverse flux machine with the ability of linear motion (FSTFMaLM), in which both the stator and the rotor cores are made by using soft magnetic composite (SMC) materials. With the special …
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Periodic Solutions of Nonlinear Relative Motion Satellites Open
The relative motion of an outline of the rendezvous problem has been studied by assuming that the chief satellite is in circular symmetric orbits. The legitimacy of perturbation techniques and nonlinear relative motion are investigated. Th…
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Design of a linear macro–micro actuation stage considering vibration isolation Open
In microelectronics manufacturing, macro–micro actuation stages are typically applied to obtain a high-precision positioning at a high acceleration. Macro–micro actuation stage comprises a voice coil motor that achieves a high-acceleration…