A Design of Innovative Experiment Platform Based on the Research of Flapping-Wing Aircraft

2014 ◽  
Vol 651-653 ◽  
pp. 587-592
Author(s):  
Bing Hao Zhu ◽  
Xiao Yi Jin ◽  
Li Li Zhao ◽  
Jing Yuan Zhang ◽  
Hua Cheng Tao
Keyword(s):  
Mechanism Design ◽  
Flapping Wing ◽  
Driving Mechanism ◽  
Experimental Platform ◽  
Experiment Platform ◽  
Design And Implementation ◽  
Design Scheme ◽  
Development Processes ◽  
Motion Parameters ◽  
Platform System

According to the fact that it need several tests to determine the size and motion parameters of the flapping-wing aircraft in the development processes, the paper proposed a design scheme of flapping wing system experimental platform. Separately from the scheme, the system platform, driving mechanism design, motion parameters change, described in detail the design and implementation of this innovation experiment platform. Users can simulate and debug the platform system to determine the performance of the flapping-wing mechanism.

Structure and aerodynamic characteristics of a coaxial quad-wing flapper

2020 ◽  
pp. 095441002096754
Author(s):  
Huan Shen ◽  
Qian Li ◽  
Kun Hu ◽  
Zhuoqun Feng ◽  
Aihong Ji
Keyword(s):  
Wind Tunnel ◽  
Flow Field ◽  
Simulation Study ◽  
Theoretical Basis ◽  
Elevation Angle ◽  
Aerodynamic Characteristics ◽  
Flapping Wing ◽  
Driving Mechanism ◽  
Wing Movement ◽  
Motion Parameters

As a special type of micro ornithopter, the coaxial quad-wing flapper (CQWF) enables greater flight speed and higher stability than the paired-wing flapper. These characteristics are closely related to the unique pneumatic mechanism of the CQWF. Therefore, the aerodynamic generation mechanism of the CQWFs has been actively researched in recent years. This study verifies the reliability of flow-field simulations in a CQWF prototype with an aerodynamically optimized driving mechanism. For the selected motion parameters and shape dimensions of the flapping-wing aircraft, the vorticity fields at different elevation angles are observed in flow-field simulations. The elevation angle strongly affects the lift. Moreover, the wing movement based on the Clap–Fling mechanism significantly affected the acquisition of the lift, which explains the higher stability of the CQWF than that of the paired-wing flapper and provides a theoretical basis for the optimization of the flapping prototype. When tested on a wind-tunnel platform, the prototype yields slightly higher lift compared with those obtained in the simulation study. In addition to confirming the phenomenon revealed in flow visualization, it also showed that the unsteady mechanism of the two-pair wing is more powerful than calculated.

scholarly journals Design and Implementation Scheme of QSFP28 Optical Transceiver for Long-Reach Transmission Using PAM4 Modulation

2021 ◽  
Vol 11 (6) ◽  
pp. 2803
Author(s):  
Jae-Woo Kim ◽  
Dong-Seong Kim ◽  
Seung-Hwan Kim ◽  
Sang-Moon Shin
Keyword(s):  
Form Factor ◽  
Low Cost ◽  
Pulse Amplitude ◽  
Small Form ◽  
Transceiver Design ◽  
Industrial Sites ◽  
Design And Implementation ◽  
Design Scheme ◽  
Implementation Scheme ◽  
Small Form Factor

A quad, small form-factor pluggable 28 Gbps optical transceiver design scheme is proposed. It is capable of transmitting 50 Gbps of data up to a distance of 40 km using modulation signals with a level-four pulse-amplitude. The proposed scheme is designed using a combination of electro-absorption-modulated lasers, transmitter optical sub-assembly, low-cost positive-intrinsic-native photodiodes, and receiver optical sub-assembly to achieve standard performance and low cost. Moreover, the hardware and firmware design schemes to implement the optical transceiver are presented. The results confirm the effectiveness of the proposed scheme and the performance of the manufactured optical transceiver, thereby confirming its applicability to real industrial sites.

scholarly journals Dove: A biomimetic flapping-wing micro air vehicle

2017 ◽  
Vol 10 (1) ◽  
pp. 70-84 ◽  
Author(s):  
Wenqing Yang ◽  
Liguang Wang ◽  
Bifeng Song
Keyword(s):  
Mechanism Design ◽  
Flapping Wing ◽  
Micro Air Vehicle ◽  
Flexible Wing ◽  
The Past ◽  
Ground Station ◽  
Air Vehicle ◽  
Research Goal ◽  
Color Video ◽  
Flapping Mechanism

This paper describes the design and development of the Dove, a flapping-wing micro air vehicle (FWMAV), which was developed in Northwestern Polytechnical University. FWMAVs have attracted international attentions since the past two decades. Since some achievements have been obtained, such as the capability of supporting an air vehicle to fly, our research goal was to design an FWMAV that has the ability to accomplish a task. Main investigations were presented in this paper, including the flexible wing design, the flapping mechanism design, and the on-board avionics development. The current Dove has a mass of 220 g, a wingspan of 50 cm, and the ability of operating fully autonomously, flying lasts half an hour, and transmitting live stabilized color video to a ground station over 4 km away.

scholarly journals Driving Mechanisms, Motion, and Mechanics of Screw Drive In-Pipe Robots: A Review

2019 ◽  
Vol 9 (12) ◽  
pp. 2514 ◽  
Author(s):  
Tao Ren ◽  
Yin Zhang ◽  
Yujia Li ◽  
Yonghua Chen ◽  
Qingyou Liu
Keyword(s):  
Mechanism Design ◽  
Driving Mechanism ◽  
Mechanical Behaviors ◽  
Pipe Inspection ◽  
Advantages And Disadvantages ◽  
Screw Drive ◽  
Driving Mechanisms ◽  
Pipe Networks ◽  
Design Requirements ◽  
Inspection Tasks

In recent years, interest in in-pipe robot research has been steadily increasing. This phenomenon reflects the necessity and urgency of pipe inspection and rehabilitation as several pipe networks have become outdated around the globe. In-pipe robots can be divided into several groups in accordance with their locomotion principles, each with its own advantages and best suited application scope. Research on the screw drive in-pipe robot (SDIR) has had a rising trend due to the robot’s simple driving mechanism design and numerous advantages. This study compares and analyzes the characteristics of various SDIRs from the aspects of mechanism design, driving principle, and motion and mechanical behaviors. Each SDIR has its own advantages and disadvantages depending on its design requirements and intended applications. A number of prototypes have been fabricated to verify their functionality and efficiency in inspection tasks. This study can provide an up-to-date reference for researchers to conduct further analysis on SDIRs.

Design and Implementation of Computer Grade Examination Registration System

2014 ◽  
Vol 556-562 ◽  
pp. 5794-5796
Author(s):  
Zhen Dong Gao
Keyword(s):  
Examination System ◽  
Huge Amount ◽  
Registration System ◽  
Design And Implementation ◽  
Design Scheme

At present, as the nationwide examination subject,the computer grade examination has a very great number of candidates. Even in a certain point of registration, registration of candidates tend to reach thousands of scale. The huge amount of work create enormous pressure and risk for the registration work. In order to improve the efficiency of the registration work, reduce the risk of error, the paper proposed a design scheme of computer grade examination system and the realization of the process. After the test of practice, the system is feasible and reliable, which greatly reduces the workload of staffs in registration point to facilitate the majority of candidates, reducing the chances that could go wrong.

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