A Novel Cupped Solid-State Wave Gyroscope

2011 ◽  
Vol 110-116 ◽  
pp. 715-722
Author(s):  
Tao Yi ◽  
Xue Zhong Wu ◽  
Ding Bang Xiao ◽  
Xiang Xi ◽  
Ying Qi Tan
Keyword(s):  
Solid State ◽  
Piezoelectric Effect ◽  
Structural Features ◽  
Mode Frequency ◽  
The Novel ◽  
Q Factor ◽  
Design Scheme ◽  
State Wave ◽  
Working Principle ◽  
Novel Design

Aiming at improving the Q-factor and simplifying the fabricating process of the cupped solid-state wave Gyroscope, a novel cupped solid-state wave gyroscope based on piezoelectric effect is presented in this paper. The sensor has a novel cupped metallic resonator comprises of a cone shell and eight thin flat beams. The working principle of the gyroscope is validated by FEM. Compared with conventional solid-stated gyroscopes, the novel structural features improve the Q-factor and simplify the fabricating process of the gyroscope. The prototypal gyroscope is fabricated and tested, the work mode frequency is about 3979Hz, and the Q-factor is over 8000 in atmosphere. The side-lobes in the output signal’s FFT curve validate the novel design scheme.

scholarly journals Model of Determination of Defect Difference in Q-Factor of a Solid-State Wave Gyroscope

2018 ◽  
Vol 16 (2) ◽  
pp. 69
Author(s):  
R V Melnikov ◽  
G A Trutnev ◽  
A V Shchenyatskiy
Keyword(s):  
Solid State ◽  
Q Factor ◽  
State Wave

Рассматривается чувствительный элемент, его геометрические особенности и погрешности, влияющие на тактико-технические характеристики изделия. Проведен анализ, который показал, что основной вклад в собственный уход угла вносят такие погрешности, как упруго-массовые дефекты кварцевого резонатора, неточность сборки конструкции, ошибки в системе съемки и управления, геометрические погрешности резонатора. Оценено влияние таких погрешностей, как разночастотность и разнодобротность на окончательные характеристики навигационного прибора. Твердотельный волновой гироскоп является сложной измерительной системой [1], в его состав входит управляющая компонента, которая уменьшает влияние некоторых неидеальностей прибора. Актуальной задачей является совершенствование управляющей компоненты и повышение точности всей измерительной системы. Перспективным направлением является применение адаптивных систем автоматического управления, поскольку существует необходимость индивидуально подстраиваться под каждый чувствительный элемент: настраивать резонансную частоту чувствительного элемента, выполнять захват собственной частоты колебаний, формировать сигналы рассогласования амплитуды колебаний и т. д. При изменении массогабаритных параметров резонатора, играющих важную роль в измерительном тракте прибора, необходимо проводить изменение параметров системы управления, что увеличивает временные и трудовые затраты. Для повышения эффективности отработки системы автоматического управления, сокращения времени доведения прибора до требуемого уровня качества необходимо разработать математическую модель системы управления. Рассматривается идеальное осесимметричное тело, жестко защемленное за ножку резонатора. В данной статье рассматривается модель контура автоматического подавления разнодобротности для пуш-пульной системы управления твердотельного волнового гироскопа [2]. Сделано предположение о возможности применения результатов имитационного моделирования для дальнейшей реализации контура подавления разнодобротности в составе навигационного блока.

Torsional Rigidity of the Advanced Actuator

2010 ◽  
Vol 29-32 ◽  
pp. 2416-2421
Author(s):  
Chang Ping Zou
Keyword(s):  
Torsional Rigidity ◽  
Operating Performance ◽  
Structural Features ◽  
Important Influence ◽  
Ball Screw ◽  
The Novel ◽  
Analytical Computation ◽  
Working Principle ◽  
Important Design

System torsional rigidity is an important design index, having important influence on operating performance of the advanced actuator; therefore, this paper emphasizes the study on calculation of system torsional rigidity. This paper firstly introduces working principle and structural features of the novel ball screw transmission. Then uses commercial CAD and FEM softwares, SolidWorks and Cosmos/Works, fulfils deformation analytical computation for such three key parts as driveshaft, fixed guiding sleeve and straight-rotary sleeve. Next, sum up each term of torsional rigidity. Finally, makes a conclusion that the system torsional rigidity of the advanced actuator satisfies the designing demand.

CAD AND CAE TECHNOLOGIES OF A NOVEL PLANE SIX-BAR SWAYING MACHINE

2008 ◽  
Vol 07 (01) ◽  
pp. 65-67
Author(s):  
CHANGPING ZOU ◽  
LI DU ◽  
XIANDE HUANG
Keyword(s):  
High Pressure ◽  
Kinetic Analysis ◽  
Rotational Speed ◽  
Preliminary Analysis ◽  
Unit Weight ◽  
The Novel ◽  
Parameterized Modeling ◽  
New Type ◽  
Working Principle ◽  
Key Dimensions

A new type of six-bar swaying machine was put forward, which is an ingenious combination of plane multi-bar mechanism and high pressure oil cylinder. Preliminary analysis shows that this machine has many advantages, such as the torque produced by its unit weight, its small size, its light deadweight, etc. Thus it can be applied to situations that need swaying mechanism with low rotational speed and great torque. Firstly, the mechanism composition and working principle of the swaying machine were introduced. Secondly, parameterized modeling of the mechanism was carried out by utilizing software ADAMS. Then kinematic analysis and kinetic analysis were completed by using ADAMS. Finally, key dimensions were adjusted according to kinetic analysis. These tasks are believed to be beneficial to the development of the novel transmission.

Synthesis of New Chalcogenide Materials. The Novel One-Dimensional Semiconductor K4 Ti3 S14

1987 ◽  
Vol 97 ◽  
Author(s):  
Steven A. Sunshine ◽  
Doris Kang ◽  
James A. Ibers
Keyword(s):  
Electrical Conductivity ◽  
Solid State ◽  
Alkali Metal ◽  
The Novel ◽  
Conductivity Measurements ◽  
One Dimensional ◽  
General Utility ◽  
Solid State Materials ◽  
Chalcogenide Materials

ABSTRACTThe use of A2 Q/Q melts (A - alkali metal, Q - S or Se) for the synthesis of new one-dimensional solid-state materials is found to be of general utility and is illustrated here for the synthesis of K4 Ti3 SI4. Reaction of Ti metal with a K2 S/S melt at 375°C for 50 h affords K4 Ti3 SI4. The structure possesses one-dimensional chains of seven and eightcoordinate Ti atoms with each chain isolated from all others by surrounding K atoms. There are six S-S pairs (dave - 2.069(3) Å) so that the compound is one of TiIV and may be described as K4 [Ti3 (S)2 (S2)6]. Electrical conductivity measurements indicate that this material is a semiconductor.

Equilibrium and Kinetic Properties of Minerals

1998 ◽  
Vol 62 (5) ◽  
pp. 581-583
Author(s):  
Simon A. T. Redfern
Keyword(s):  
Solid State ◽  
Statistical Mechanics ◽  
Structural Features ◽  
Atomic Scale ◽  
Kinetic Properties ◽  
Computational Power ◽  
Equilibrium Thermodynamics ◽  
Bulk Properties ◽  
Scale Characteristics ◽  
Number Of Publications

How can the equilibrium and non-equilibrium thermodynamics of minerals be understood from their atomic-scale structural features? How can they be predicted, simply from models for the forces between atoms? Advances in analytical theory, statistical mechanics, experimental solid-state science, computational power, and the sophistication of a mineralogical approach that brings all of these together, means that these questions, once imponderable, are now realistically tractable. These questions have been exercising the minds of mineralogists over the last decade or so, and have motivated many developments in the science. Acting as way-markers along the path, there are a number of publications which have followed from meetings where these questions have been addressed. It is now twelve years since the publication of Microscopic to Macroscopic, an edition of Reviews in Mineralogy (Kieffer and Navrotsky, 1985) that sought to identify the fundamental controls on the bulk properties of minerals in terms of their atomic-scale characteristics.

Comparison of moonlighting guanylate cyclases: roles in signal direction?

2014 ◽  
Vol 42 (6) ◽  
pp. 1773-1779 ◽  
Author(s):  
Lubna Freihat ◽  
Victor Muleya ◽  
David T. Manallack ◽  
Janet I. Wheeler ◽  
Helen R. Irving
Keyword(s):  
Interleukin 1 ◽  
Structural Features ◽  
Kinase Domain ◽  
The Novel ◽  
Natural Ligands ◽  
Signalling Cascades ◽  
A Minor ◽  
Mammalian Protein ◽  
Homology Models

Over 30 receptor-like kinases contain a guanylate cyclase (GC) catalytic centre embedded within the C-terminal region of their kinase domain in the model plant Arabidopsis. A number of the kinase GCs contain both functional kinase and GC activity in vitro and the natural ligands of these receptors stimulate increases in cGMP within isolated protoplasts. The GC activity could be described as a minor or moonlighting activity. We have also identified mammalian proteins that contain the novel GC centre embedded within kinase domains. One example is the interleukin 1 receptor-associated kinase 3 (IRAK3). We compare the GC functionality of the mammalian protein IRAK3 with the cytoplasmic domain of the plant prototype molecule, the phytosulfokine receptor 1 (PSKR1). We have developed homology models of these molecules and have undertaken in vitro experiments to compare their functionality and structural features. Recombinant IRAK3 produces cGMP at levels comparable to those produced by PSKR1, suggesting that IRAK3 contains GC activity. Our findings raise the possibility that kinase-GCs may switch between downstream kinase-mediated or cGMP-mediated signalling cascades to elicit desired outputs to particular stimuli. The challenge now lies in understanding the interaction between the GC and kinase domains and how these molecules utilize their dual functionality within cells.

scholarly journals Redox-State Dependent Spectroscopic Properties of Porous Organic Polymers Containing Furan, Thiophene, and Selenophene

2017 ◽  
Vol 70 (11) ◽  
pp. 1227 ◽  
Author(s):  
Carol Hua ◽  
Stone Woo ◽  
Aditya Rawal ◽  
Floriana Tuna ◽  
James M. Hook ◽  
...  
Keyword(s):  
Solid State ◽  
Redox State ◽  
Spectroscopic Properties ◽  
Structural Features ◽  
Organic Polymers ◽  
Stimuli Responsive ◽  
Porous Organic Polymers ◽  
Paramagnetic Resonance ◽  
Responsive Materials ◽  
State Dependent

A series of electroactive triarylamine porous organic polymers (POPs) with furan, thiophene, and selenophene (POP-O, POP-S, and POP-Se) linkers have been synthesised and their electronic and spectroscopic properties investigated as a function of redox state. Solid state NMR provided insight into the structural features of the POPs, while in situ solid state Vis-NIR and electron paramagnetic resonance spectroelectrochemistry showed that the distinct redox states in POP-S could be reversibly accessed. The development of redox-active porous organic polymers with heterocyclic linkers affords their potential application as stimuli responsive materials in gas storage, catalysis, and as electrochromic materials.

A Novel Design of the Device for Measuring Draw and Plug Forces

2012 ◽  
Vol 542-543 ◽  
pp. 1029-1032
Author(s):  
Ye Hu ◽  
Zhao Jun Yang ◽  
Ming Jun Xiang ◽  
Zi Chen Qiu ◽  
Chuan Gui Yang ◽  
...  
Keyword(s):  
Data Conversion ◽  
Memory Module ◽  
Novel Device ◽  
Working Principle ◽  
Tool Shank ◽  
Novel Design

The purpose of this paper is to present a novel device for measuring draw and plug forces, which is composed chiefly of a pull stud, a top modified tool shank, a middle modified tool shank, a down modified tool shank, and an end cover. The modified tool shank structure is proposed, and the working principle of the device for measuring draw and plug forces is demonstrated. Also, the data conversion and memory module and the circuit principle are investigated.

Sign in / Sign up

Export Citation Format

Share Document