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The design and evaluation of a new compliant microgripper is reported in this paper on the basis of a dissymmetric mechanism. This structure has two parallelogram mechanisms which enable the generation of purely translational motion of the gripper tips. It is desirable for micromanipulation and microassembly tasks. Unlike the traditional pure-translation grippers, the presented one has a simple architecture...
This article proposes a new design of a 3D unfolded/tightened mechanism based on the spine structure of golden tree snake, which can realize torsion and bending. Inspired by golden tree snake vertebrae space deformation characteristics, analyzing the anatomy characteristics of the golden tree snake spine bone and muscle distribution characteristics, The bionic mechanism and drive unit can drive the...
In this paper we present an efficient GPU pipeline to perform high quality fluid simulation using CUDA. Our method extends standard weakly compressible smoothed particles hydrodynamics to realistically handle complex boundaries. We design a GPU pipeline of the proposed approach and map the entire components of the pipeline to CUDA kernels and data structures, fully exploiting the massive computational...
Polymetallic sulfide particle hydraulic lifting process was simulated with theoretical analysis and numerical calculation. Simulation goal was to obtain polymetallic sulfide particle hydraulic lifting conditions in vertical pipe and action rules between hydraulic lifting system parameters and hydraulic lifting performance. Mechanics analysis model of polymetallic sulfide particle hydraulic lifting...
The interest in the study of the human foot and gait loading to determine and manage the impairments associated with various musculoskeletal, integumentary, and neurological disorders has intensified considerably in recent years. This type of research is particularly important for finding the cause of diabetic foot ulceration. In this research, a dynamic plantar 3D model is captured by video cameras...
High myopia esotropia is a kind of special strabismus whose pathology is still uncertain. In this paper, the finite element analysis method is applied to examine some physiological hypotheses by modeling the movement of the eyeball and morbid extraocular muscles. The model stems from clinical data. Theoretical analyses are also performed to examine the effect of oblique pulley. Finally, postoperative...
Cane type walking assist device and comparison of its control methods are proposed in this paper. Our robotic cane has been designed using omni-directional wheel, such that it moves according to user's small force applied to the cane, and to stably support the user when he/she impose large force. The conventional control method has been compared with the proposed one in 2D space. Moreover, the validity...
Rolling mill is an important monomer production line equipment, and rolling mill main drive system is a core component. The design of rolling machine is important to improve the nature and service life of the rolling mill. This article through strip mill of the working parameters, and selected the transmission scheme to design the main components of the reducer. Through UG finished each parts 3d modeling...
Interactive bicycle roaming system is a dynamic simulator system, integrating scene modeling, dynamics simulation and system concatenation. With roaming scene constructed through 3Dmax, models are loaded and managed by use of Opengl in this paper, the interactive roaming system interface is structured vividly and with a realistic effect. In addition, the paper emulates bicycle dynamics, directly showing...
A calculation method, which allows a time efficient coupling of the machine stator and moving rotor parts and force calculation in electrical machines, dedicated to 3D Finite Element (FE) models, is presented in this paper. The method requires only a single mesh generation at the beginning of the simulation. The applied force calculation method is stabilized, using a whole air gap averaging method,...
This paper concerns the superposition of two-dimensional semi-analytical models to model three-dimensional shielding configurations. The 2-D semi-analytical models are used to describe the effect of magnetic shielding on the stray field of a single-sided coreless linear permanent magnet motor. The modeling results are compared to 3-D finite element analysis and to measurements, it is found that an...
In IMs paper, magnetic Geld characteristics in spiral-type transverse magnetic field (TMF) contacts were studied through simulation.3D finite element models of spiral-type TMF contacts were built. In order to find out the influence of breaking currents and structural parameters on magnetic blow force and B-field, models with different breaking currents and other structural parameters such as slot...
This paper deals with the development of a magnetic lead screw (MLS) for the active suspension system in a vehicle. Initially, a brief introduction to the active suspension system of a vehicle, is given, thereby identifying the benefits of having an active suspension system in a normal vehicle. Furthermore the Magnetic Lead Screw is introduced and its benefits when used with an active suspension system...
To prevent the failure of peg-in-hole assembly tasks involving geometrically complex parts, a force control-based assembly strategy that takes geometric information into account is required. Therefore, in this study, we propose an assembly strategy for complex-shaped parts which performs force control based on visually-obtained geometric information and CAD models. CAD models are used to obtain geometric...
Guaranteeing network connectivity in post-disaster scenarios is challenging yet crucial to save human lives and to coordinate the operations of first responders. In this paper, we investigate the utilization of low-altitude aerial mesh networks composed by Small Unmanned Aerial Vehicles (SUAVs) in order to re-enstablish connectivity among isolated end-user (EU) devices located on the ground. Aerial...
Humanoid fall avoidance is the ability of a robot to avoid falling when pushed. The decision surface is a region on the phase diagram delimiting the states beyond which the robot cannot recover from a disturbance. The disadvantage of the decision surface is that it is limited to perturbations in the sagittal and coronal planes. This paper deals with the generalization of the decision surface to a...
Realistic hair simulation is one of the most essential things for character designing. Existing hair simulated methods are not able to solve the contradiction among efficiency and performance. We propose a Lagrange equations-based hair simulation method to solve this problem. We first design the Lagrange function exactly, providing the accurate expression of energy and general force terms. Then we...
In this paper, the design procedure of an auto-focusing device for a microscope is presented. To obtain a long focusing distance, a new flexure positioning mechanism is devised based on multi-stage leaf springs. The proposed device allows a precise focusing without friction and backlash effects. A voice coil motor is employed to drive the positioning mechanism. The stiffness model and resonant-frequency...
Recently, the development of minimally invasive surgery has led to the emergence of the new research area: minimally invasive vascular surgery simulation. The goal of the surgery simulation is to provide a new way to enable the trainees to obtain the core skills of the techniques. One of the key component of the simulation for core skills training in minimally invasive vascular surgery is how to develop...
The first step in FEM-based deformation is voxelization, which means objects showed in original mesh will be desecrated into mass of small units (voxels), and then the characteristic matrix can be fetched with the coordinate, shape, and attributes of voxels. This paper focuses on the reciprocity between specifying voxel physical parameter and simulating the deformation. A table list out provides physical...
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