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The growth of 3D visualization devices, such as holograms and virtual reality, is followed by the increase of demand for 3D models. One cheap and straightforward way of creating them is by photogrammetry. However, taking the necessary photographs is tedious and imprecise, because many different shooting angles and heights are required. Also, there may be need of doing models of objects placed on hazardous...
Limited travel constrains the widely application of XYZ parallel micro/nano-positioning stage. In this paper, a novel parallel-kinematics micro/nano-positioning stage is proposed with the goal of enlarging the travel range. In order to obtain a large input displacement for actuating the stage, voice coil motors (VCM) are adopted. For a large-travel parallel stage, the cross-axis motion increases the...
A coupled fluid-mechanical dynamics analysis method is presented in this paper. A commercial simulation package is used for mechanical dynamics calculation, which employs user-developed dynamic-link library files as routine interface to enable data exchange with gas pressure calculation. This part is responsible for the calculation of mechanical motion, including the tripping of trip trigger, releasing...
Percutaneous therapy is a common clinical operation in minimally invasive surgery. Yet, learning curve of this skillful manual operation is steep, which imposes negative impacts on its further advances. In this paper, we proposed a novel workflow to simulate percutaneous therapy through visuo-haptic rendering based on the clinical trials. Intraoperative puncture data, obtained by our 6DOF force recording...
Haptic skills are essential for effective Cardiopulmonary Resuscitation (CPR). Existing CPR training simulators provide unrealistic chest conditions. It is assumed that the CPR performance on a real human chest is the same even when the trainees have learnt on unrealistic dummy chests. To test this assumption we have developed an immersive Virtual Reality based CPR simulator in which force feedback...
Partitioned stator flux reversal permanent magnet (PS-FRPM) linear machine is a type of permanent magnet linear machine with dual active stators and one passive mover. Pervious work was shown that such a machine possesses the advantage of having big slot area leading to reduced phase resistance and consequently improved electric loading capability. In order to verify the finite element (FE) results,...
Medical training systems often require the use of haptic interaction with deformable models and high visual fidelity. It is necessary to get a compromise between the geometric model and the deformation model in order to achieve the required frame rate for haptic interaction of 1000Hz. Frequently low level geometric models are used to describe the geometry of the object. This produces large data structures...
This paper presents a transverse flux linear motor (TFLM) with the superconductor-aluminum hybrid as the secondary and E-shaped ferromagnetic yokes wrapped the conductor windings as the primary to generate the transverse flux, the hybrid secondary is made of aluminum plate and close-ended coated superconductor coils, with the latter placed over the former to realize the stable levitation, guidance...
The vibrational characteristics of the mid-infrared solid-state laser is an important factor which affects the laser output characteristic and the system integrated performance. Starting with the dynamic equilibrium equation, The simulation models of the vibrating effect of the solid-state laser and the key components are established, and the natural characteristics and dynamic response of the solid-state...
Permanent-magnet (PM) direct-drive radial-axial flow turbine generator is widely used in the field of low-grade waste heat (below 200 °) Organic Rankine Cycle (ORC) power generation. However, special mechanical balance devices are needed to suppress the axial force produced by radial-axial turbine under the high-speed operation, resulting in not only the complex structure of the generator, but also...
This paper presents a preliminary study for a virtual reality simulation for testing the behavior of electric propulsion systems in electrical traction applications. The car model is realized and connected to the propulsion model in MATLAB Simulink whereas the inputs for the model are coming from the Virtual Reality Environment (VRE).
In this study, rivet optimization is analyzed for a channel section of a fuselage frame. Rivets are captured by using beam elements in ANSYS Workbench. In order to optimize locations of rivets, basic rivet group on frame is analyzed by using given output loads (forces and moment). Based on this analysis, hand calculation was conducted then Workbench optimization option in ANSYS is used to find out...
Aiming at the consensus of leader-follower multi-warhead networked cooperative attack system with stochastic multi-step time-varying delay in the free flight segment of ballistic missile, considering the actual situation, a three-dimensional integrated guidance model of leader-follower multi-warhead cooperative attack system is established. Based on the established model, considering the effect of...
Unmanned aerial vehicles (UAV) can potentially carry out a wide range of tasks and operate in hazardous conditions. Some tasks require complex and precise aircraft movements in the presence of external disturbances. In this paper, a design of non-flat multirotor configuration (NFH6) is presented. Through dynamic model, it is shown that flat multirotor configurations share inherent underactuated condition...
The results of the work on the creation of a hand rehabilitation complex with given mass-size characteristics and various training regimes are presented. A brief description of the three versions of the mechanical part of the rehabilitation device is given. A simplified device control scheme is presented, a brief description of the training modes is given, additional modules that expand the functional...
In this research, the body of a sheet hydroforming press, which can produce an industrial product, was designed and dimensioned. Initially, the required pressure and forces to produce the industrial product were determined by finite element analysis. Then, structural analysis of the press body was conducted by using these forces in Solidworks Premium simulation module. The strain gauges were bonded...
It is a problem needs to overcome that steel rails induce eddy current when the maglev train runs. Most of the existing studies are about lower speed operations, and there are few studies aim at the situation of EMS high-speed maglev train. This paper simplifies the construction of EMS high-speed maglev train, simulates it by electromagnetic field simulation software Ansoft Maxwell, and researches...
Accurate mathematical models especially accurate hydrodynamic parameters of unmanned underwater vehicles (UUVs) are essential for good control performance. This paper provides a general framework for the hydrodynamic modeling of a small-scale UUV. In place of physical experiments such as captive model tests, a virtual model test and simulation was conducted via commercial computational fluid dynamics...
In this paper, we present a control method for bipedal robotic walking based on insights we obtain from simple models. Inspired by the virtual pendulum (VP) concept and the spring-mass walking models, we propose a force direction control method to redirect the axial force of a compliant leg in order for walking with upright trunk. We first consider a dynamic simulation of a simple planar walking model...
The best way for researchers to test their algorithms and design concepts, before experimenting on real human beings, is to create simulation environment platforms. In this paper, a virtual simulator for active endoscopic capsules is proposed. The simulator intends to provide researchers with an environment to test their vision and navigation algorithms applied to endoscopic capsule applications....
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