scholarly journals The Synchronization Transceiver Design and Experimental Verification for the LuTan-1 SAR Satellite

Sensors ◽  
2020 ◽  
Vol 20 (5) ◽  
pp. 1463
Author(s):  
Yuanbo Jiao ◽  
Da Liang ◽  
Kaiyu Liu ◽  
Yafeng Chen ◽  
Huaizu Wang ◽  
...  
Keyword(s):  
Phase Synchronization ◽  
Echo Signal ◽  
Detailed Design ◽  
Residual Phase ◽  
Unit Design ◽  
Working Principle ◽  
Synchronization Scheme ◽  
Synchronization Accuracy ◽  
Switch Module ◽  
Synchronization Unit

The deviation between the two oscillators in BiSAR systems will cause a residual modulation of echo signal. Therefore, the phase synchronization is an important issue that must be addressed for BiSAR systems. An advanced non-interrupted phase synchronization scheme is used for the LuTan-1 SAR satellite. The synchronization transceiver (STR) is designed for transmitting and receiving synchronization signals. In addition, STR mainly consists of master and auxiliary transceivers and switch module. Furthermore, the function and working principle of STR are introduced, and the detailed design of each part is described. The measured results are also evaluated to prove the performance of the STR. In addition, the phase synchronization accuracy is also demonstrated to verify the effectiveness of the non-interrupted synchronization scheme. The standard deviation (STD) of the residual phase is less than 0.3 degrees. The results have guiding significance for the synchronization unit design of LuTan-1 and the future BiSAR system.

A block turbo phase synchronization scheme

2006 ◽  
Vol 13 (3) ◽  
pp. 125-128 ◽  
Author(s):  
C. Vanstraceele ◽  
J.P. Barbot ◽  
J.M. Brossier ◽  
B. Geller
Keyword(s):  
Phase Synchronization ◽  
Synchronization Scheme

Experimental Study on Heat Pipe Heat Recovery Type of Fresh Air Ventilator

2012 ◽  
Vol 608-609 ◽  
pp. 1172-1176
Author(s):  
Li Ying Sun ◽  
Li Tao Xiao ◽  
Yi Tong Li
Keyword(s):  
Experimental Study ◽  
Heat Pipe ◽  
Heat Recovery ◽  
Natural Circulation ◽  
High Heat ◽  
Good Effect ◽  
Unit Design ◽  
New Type ◽  
Working Principle ◽  
Indoor And Outdoor

Have proposed a heat recovery of fresh air ventilator system form,which is based on the technology of refrigerant natural circulation named heat-pipe. Describes the working principle of the unit, designs a new type of heat recovery air ventilator test equipment,and carries out a experimental study on its running performance.Have come to the effect of air flow and the temperature difference between indoor and outdoor for the heat recovery rate. Experimental results show that this equipment has a high heat recovery efficiency and a good effect on energy-saving . Through experimenting on the performance, laying a foundation for further optimization of unit design.

scholarly journals Phase synchronization scheme for a practical phase sensitive amplifier of ASK-NRZ signals

2011 ◽  
Vol 19 (13) ◽  
pp. 12384 ◽  
Author(s):  
Stylianos Sygletos ◽  
Selwan K. Ibrahim ◽  
Ruwan Weerasuriya ◽  
Richard Phelan ◽  
L. Grüner Nielsen ◽  
...  
Keyword(s):  
Phase Synchronization ◽  
Phase Sensitive ◽  
Synchronization Scheme

scholarly journals Shunt Active Power Filter: A Review on Phase Synchronization Control Techniques

Electronics ◽  
2019 ◽  
Vol 8 (7) ◽  
pp. 791
Author(s):  
Yap Hoon ◽  
Mohd Amran Mohd Radzi ◽  
Muhammad Ammirrul Atiqi Mohd Zainuri ◽  
Mohamad Adzhar Md Zawawi
Keyword(s):  
Power System ◽  
Phase Synchronization ◽  
Active Power Filter ◽  
Active Power ◽  
Shunt Active Power Filter ◽  
Power Filter ◽  
Harmonic Currents ◽  
Working Principle ◽  
And Performance ◽  
Suitable Technique

Owing to the destructive impacts of harmonic currents, the topic of reducing their impacts on power system has attracted tremendous research interests. In this regard, a shunt active power filter (SAPF) is recognized to be the most reliable instrument. It performs by first detecting the harmonic currents that are present in a harmonic-contaminated power system, and subsequently generates and injects corrective mitigation current back into the power system to cancel out all the detected harmonic currents. This means that other than the ability to generate corrective mitigation current itself, it is actually more important to make sure that the SAPF is able to operate in phase with the operating power system, so that the mitigation current can correctly be injected. Hence, proper synchronization technique needs to be integrated when designing the control algorithms of SAPF. This paper critically discusses and analyzes various types of existing phase synchronization techniques which have been applied to manage operation of SAPF; in terms of features, working principle, implementation and performance. The analysis provided can potentially serve as a guideline and provision of information on selecting the most suitable technique for synchronizing SAPF with the connected power system.

First Demonstration of Multipath Effects on Phase Synchronization Scheme for LT-1

2020 ◽  
Vol 58 (4) ◽  
pp. 2590-2604
Author(s):  
Yanyan Zhang ◽  
Heng Zhang ◽  
Naiming Ou ◽  
Kaiyu Liu ◽  
Da Liang ◽  
...  
Keyword(s):  
Phase Synchronization ◽  
Multipath Effects ◽  
Synchronization Scheme

scholarly journals An Eye Tracking based Aircraft Helmet Mounted Display Aiming System

2022 ◽  
Author(s):  
Mengtang Li ◽  
Quanlong Qiu ◽  
Jie Zhu ◽  
Chao Gou
Keyword(s):  
Eye Tracking ◽  
Light Source ◽  
Head Movement ◽  
Design Methodology ◽  
Proof Of Concept ◽  
Experimental Characterization ◽  
Detailed Design ◽  
Working Principle

<p>In this paper, we comprehensively present new advancements towards the working-principle, algorithm, prototype setup and experimental characterization and feasibility demonstration of a new aircraft helmet mounted display aiming system. More specifically, we describe detailed design methodology and algorithm of an eye tracking based HMD aiming system. We also present a proof-of-concept prototype and conduct experiment tests in lab environment to characterize the performance of the proposed system. Lastly, through a comparison with related works, we demonstrate the advantages of the proposed HMD system for free head movement and no additional light source required.</p>

Development of the Auto-Fit Dial and its application to protective vests

2021 ◽  
pp. 004051752110608
Author(s):  
Jaewook Ryu ◽  
Sujin Park ◽  
Sumin Helen Koo ◽  
Giuk Lee
Keyword(s):  
High Speed ◽  
Release Mechanism ◽  
Concept Design ◽  
Element Analysis ◽  
Detailed Design ◽  
Spiral Spring ◽  
Working Principle ◽  
The Wire ◽  
Pulling Force ◽  
Time Required

This study proposes the Auto-Fit Dial, which is suitable for high-speed fitting; it includes a function that can wind wire at high speed using an energy storage–release mechanism. The Auto-Fit Dial can store energy in advance in the spiral spring via the rotation of the knob cover, and it releases the stored energy to wind the wire when required by pushing the knob cover. Firstly, the concept design and working principle of the Auto-Fit Dial are explained. Next, a detailed design and structural stability analysis of the mechanical components are described based on the design formula and finite-element analysis. An Auto-Fit Dial prototype is manufactured according to the detailed design with the weight, diameter, and height of 9.7 g, 30.5 mm, and 16.7 mm, respectively. The maximum number of rotations is 5.2 turns, which can wind a wire up to a length of 320 mm. The pulling force applied when the Auto-Fit Dial pulls the wire is initially measured as 5.10 N. The time required to wind a 320 mm wire is 0.015 s, which results in an average speed of 21.33 m/s. Moreover, the Auto-Fit Sleeve is fabricated and applied to the arm sleeve to verify the utility of the Auto-Fit Dial, which combines wire and fabric. Finally, the Auto-Fit Vest is developed by applying a protective vest to the Auto-Fit Dial.

An Advanced Phase Synchronization Scheme for LT-1

2020 ◽  
Vol 58 (3) ◽  
pp. 1735-1746 ◽  
Author(s):  
Guodong Jin ◽  
Kaiyu Liu ◽  
Dacheng Liu ◽  
Da Liang ◽  
Heng Zhang ◽  
...  
Keyword(s):  
Phase Synchronization ◽  
Advanced Phase ◽  
Synchronization Scheme
Sign in / Sign up

Export Citation Format

Share Document