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Multipole field electromagnetic launcher (MFEL) is a new type of induction launcher that can produce radial magnetic field. This paper proposed different driving coil connection patterns of MFEL and analyzed their performance through experimental and simulation methods. To verify the conceptual feasibility, a small-size single stage capacitor-driven MFEL was built and tested for the first time. Powered...
In this paper, in order to determine the shape of a snowboard course (currently known as a "halfpipe") to maximize the production of "vertical air", namely the maximum vertical distance above the edge of halfpipe, by a skilled snowboarder, we adjust the inclination for transition of the snowboard course. We begin with a simple and idealized model, gradually add additional assumptions,...
In vehicle tests, wheel force transducers are installed on the wheel. So the force data gathered are mixed with noises in different frequency bands and it is difficult to filter the noises with traditional methods. This paper proposes a new wavelet method with nonlinear threshold control of the wavelet coefficients. The results of an experiment with this method show its correctness and efficiency...
Belt simulation is the key point of virtual prototyping (VP) technology for belt conveyor. ADAMS can carry on the simple conveyor belt simulation. For its low precision and heavy work, ADAMS is not suitable for belt conveyer VP modeling and simulation. A new simulation method based on RecurDyn is introduced in this paper. The conveyor belt is divided into finite discrete micro belt segments. With...
This paper presents a design frame of a leg exoskeleton. The performance of an exoskeleton was analyzed by studying a model of a linear coupled 1-DOF human-exoskeleton system. The results showed that a low-impedance, anthropomorphic and well attached mechanical structure is benefit for the control of exoskeleton, and a direct force feedback control could also be implemented to further reduce the impedance...
Deformable objects raise a complex combination of issues ranging from estimating mechanical parameters, solving large systems of differential equations, detecting collisions, modeling responses to collisions. Some issues in surgical simulation such as collision detection and feedback force computation still lack adequate solutions. To resolve these problems, we researched on the haptic rendering system...
Deformable objects raise a complex combination of issues ranging from estimating mechanical parameters, solving large systems of differential equations, detecting collisions, modeling responses to collisions. The models for deformable objects should not only estimate the direction and the amount of deformation of each node but also the magnitude and direction of interaction forces that will be reflected...
The fin stabilizer is used to reduce the roll motion of ship at zero speed, which is a new application of fin stabilizer. In order to study the process of lift generation of fin stabilizer at zero speed, the model of lift generation of fin stabilizer with double variable chord wings is built based on biomimetic theory such as Weis-Fogh mechanism by the conformal representation. By the methods of simulation...
We demonstrate the assisted-heating for ultrasonic nanoimprint lithography (U-NIL) to solve the problem of ultrasonic vibrations only apply to the interface between the convexity of the mold and the polymer, which the heat from ultrasonic vibrations is unable to be transferred into the cavity in time. Using poly(ethylene terephthalate) (PET) as imprinted polymer, we have compared imprinted results...
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