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The biomimetic principle applied in the deployable structure design process has important significances in engineering reality. Principle in nature provides numerous design solutions for innovative deployable structures. Meanwhile, it has initiated a new area for biomimetic research. In this paper, the mechanism of butterfly eclosion deploy process is introduced. According to the butterfly wings eclosion...
In this paper, a 60 GHz radio frequency (RF) front-end for receivers is designed, which can work as a down-converter mode or a demodulator mode by slightly changing the assembly process. The RF covers 55 to 65 GHz while the IF is from 3 to 5 GHz as a converter and 0 to 5 GHz as a demodulator. The single-side band noise figure (NF) is predicted to be less than 4.53 dB and the conversion gain is higher...
In this paper, a novel wideband waveguide-to-microstrip transition is proposed and designed, which transforms a waveguide port to a microstrip port via a substrate integrated waveguide (SIW) transformer. The operation frequency covers the full frequency bands of the WR-51 waveguide and the WR-43 waveguide from 14.5 GHz to 26.7 GHz. The simulation results show that the insertion loss is less than 0...
In this paper an integrated operating simulation system (OSS) for a cryogenic air separation unit (ASU) is developed, which can be used for operators' training, accident and malfunction analysis and prediction of operating result. Based on the method of modularization an ASU's components are divided by their physical function. The OSS code includes two parts: the key simulation part which is developed...
Microfabracation is the critical technology to obtain microelectromechanical systems (MEMS) parts. Nowadays, microfabrication technologies are usually based on the mask lithography and Focused-ion-beam (FIB) sputtering, which are in fact two and a half dimensional (2.5-D) fabrication and are difficult to fabricate real 3-D parts. Based on the real 3-D fabrication technology of two-photon of femtosecond...
Many CAD/CAM softwares are developed by foreign and domestic companies. They are widely used in manufacturing enterprises which leads CAD/CAM technology continues to mature. CAD/CAM software is not only widely used in the 2D/3D part design but also widely used in NC programming now. Based on the CAD/CAM software of Cimatron E8.0, critical techniques that affect design precision are introduced firstly...
To adapt the miniaturized development tendency of nanometer positioning devices, a new type of two-dimensional micro-displacement stage which can implement nanometer-level ultra-precision positioning without feedback control is designed. The designed micro-displacement stage takes a group of piezoelectric ceramic actuators(PZTAs) connected in series as actuator unit, takes flexure plates as elastic...
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