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This paper proposes a right-circle flexural hinge design for enlarging the displacement of bridge-type mechanisms as an alternative to the commonly used inner output type. The proposed design uses the outer side as the output so that it is suitable for some engineering applications with output force. Based on the elastic beam theory, a formula for the right-circle displacement amplification ratio...
We propose and demonstrate a compact and high-resolution optical orbital angular momentum (OAM) sorter that consists of a quadratic fan-out mapper and a dual-phase corrector positioned in the pupil plane and the Fourier plane respectively. The novel scheme paves the way for the miniaturization and integration of high-resolution OAM sorters.
A practical approach for accurately modeling high-speed link structures is presented and named as the “cut and stitch” (C&S) methodology. To generate S-parameters for the whole system, C&S first cuts the structure into different parts with different electromagnetic (EM) features and also provides auto-generated ports at the cutting interfaces to do system connection later, then selects the...
Calculation of electromagnetic vibration and noise for disk permanent magnet synchronous machines (DPMSM) by using the finite element method (FEM) is presented in this paper. The pulse measuring system produced by the Danish B&K company for noise and vibration is used to measure a DPMSM in a anechoic chamber. Finally, both calculating and measuring results are analyzed, and the acoustic source...
Ultrasonic transducer is an important part of bonding-head in wire bonding device. Bonding quality is effected by ultrasonic transducer properties. According to a dimension plane-wave theory, an initial design of ultrasonic transducer is presented. Ultrasonic transducer modal frequency is calculated by FEM. Prototype is fabricated and tested using impedance analysis instrument. Experimental results...
The increasing interest in micro-electromechanical systems (MEMS) has raised the requirement for novel composite materials with improved material properties. A direct modeling strategy for the prediction of the effective moduli of composite materials based on finite element method (FEM) is investigated in this paper. A specimen model in FEM is firstly meshed into small indiscriminating domains, which...
In this paper the design of piezoelectric resonant filter with tunable bandwidth is introduced. The distributed piezoelectric finite element model of resonant filter is proposed. By means of static analysis and modal analysis of piezoelectric finite element model based on ANSYS, the specific value of lumped model of piezoelectric resonator of a specific example is obtained. Based on this lumped model,...
Offset loading is usually considered as the special instance of upright loading in the traditional design process of wheel loaders. The value of stress is often magnified by the traditional design method. It leads that the intensity reserve of lift-arms is needless big. This may result in the waste of raw materials, an increase of lift-arms’ weight and low work efficiency. The offset loading coefficient...
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