Research on One-Dimensional High Frequency Linear Motion Platform

2015 ◽  
Vol 734 ◽  
pp. 332-335
Author(s):  
Fei Wang ◽  
Rong Rong Wu ◽  
Li Qiang Wang ◽  
Si Yuan Wu
Keyword(s):  
High Frequency ◽  
High Speed ◽  
Voice Coil Motor ◽  
Design Solution ◽  
Mechanical Transmission ◽  
Linear Motion ◽  
Motion Platform ◽  
One Dimensional ◽  
The One ◽  
And Control

Precision motion system is driven directly by high frequency linear motion platform, eliminating the adverse effects brought by mechanical transmission, and greatly improving the rapid reaction capability and the control accuracy of feedback system. The linear motion platform is widely used in various types of high-speed, precision machining equipment. In the paper, the one-dimensional linear motion platform is described, and design solution of mechanical part and control system is also introduced, including working principle and structure of voice coil motor, control methods of grating sensors, circuit of grating sensor, drive and control circuit. Displacement control, speed control and output force control of the one-dimensional linear motion control platform can be achieved. So the one-dimensional linear motion platform can be applied in the movement device in high-precision and high-speed.

Structure and Self-Assembly of Multicolored Naphthalene Diimides Semiconductor

Nano LIFE ◽  
2016 ◽  
Vol 06 (03n04) ◽  
pp. 1642007
Author(s):  
Zhili Yao ◽  
Yuan Sun ◽  
Chen Kang
Keyword(s):  
Self Assembly ◽  
Optoelectronic Devices ◽  
Supramolecular Interactions ◽  
Promising Candidate ◽  
One Dimensional ◽  
Ordered Nanostructures ◽  
The One ◽  
Naphthalene Diimides ◽  
And Control ◽  
New Strategies

The one-dimensional (1D) self-assembly of [Formula: see text]-electron molecules offers efficient strategies to enhance energy and charge transfer via highly ordered and conductive [Formula: see text] stacking of the chromophores. The chromophore rich nanostructures have great potential to serve as promising candidate materials for optoelectronic devices. However, the design and control of highly ordered nanostructures with multicolored chromophore redox gradients require finely chosen synthetic strategies and a delicate balance of supramolecular interactions. In this paper, we will introduce new strategies focused on self-assembly of nanofibers based on lysine derivatives functionalized with multi colored chromophores.

VERIFICATION OF THE SHB TEST RESULTS BASED ON THE ONE-DIMENSIONAL STRESS WAVE THEORY

2008 ◽  
Vol 22 (09n11) ◽  
pp. 1068-1073
Author(s):  
TOMOKAZU MASUDA ◽  
KENJI SAITO ◽  
IZUMI MORITA ◽  
SHUSHI IKEDA ◽  
KOICHI MAKII ◽  
...  
Keyword(s):  
Strain Rate ◽  
Stress Wave ◽  
High Speed ◽  
Wave Theory ◽  
High Speed Photography ◽  
Strain Rates ◽  
One Dimensional ◽  
Strain And Strain Rate ◽  
Deformation Behaviors ◽  
The One

In order to evaluate dynamic deformation behaviors under high strain rates, Kobe Steel has developed and applied a Split-Hopkinson Bar (SHB) apparatus. This paper discusses the validity of the strain measurements and strain rates measured by this SHB apparatus. The strain waves that propagated in the incident and transmitted bars and the specimen are captured using a high-resolution type high-speed photography in detail. The strain wave propagated many times in the incident and transmitted bars and the specimen when the specimen was not broken. The amount of the deformation of the specimen decreases with the propagation frequency of the incident wave. On the other hand, to improve accuracy at the strain and strain rate calculated by the one-dimensional stress wave theory, Young's modulus, the longitudinal wave speed, and the density were accurately determined. It was understood that the calculation value showed the strain and strain rate captured with the high-speed photography are a good agreement. As a result, the validity of the measurement accuracy of this SHB could be shown.

The one-Dimensional Unsteady Flow Prediction Method for Pressure Waves in High-Speed Subway and its Applications

2011 ◽  
Vol 94-96 ◽  
pp. 1967-1970
Author(s):  
Chao Hui Zhou ◽  
Yuan Gui Mei
Keyword(s):  
Unsteady Flow ◽  
High Speed ◽  
Prediction Method ◽  
Pressure Waves ◽  
Subway Tunnel ◽  
One Dimensional ◽  
Flow Prediction ◽  
Cross Section Area ◽  
Section Area ◽  
The One

With the speed-up of subway, the discomfort problem of passengers caused by pressure waves becomes more and more serious. The prediction method of the pressure waves based on the one-dimensional unsteady compressible non-homentropic flow model and the method of characteristics is introduced, and the program is developed which can be used to calculate the pressure waves not only produced by single train passing through subway tunnel with airshafts, but also produced when the train starts or stops. On this base, the influence of the train speed and the cross-section area of airshafts to the comfort of passengers in the subway is researched. All these work provides the foundation for the development of the one-dimensional unsteady flow prediction method for pressure waves produced by the train passing through subway tunnel.

scholarly journals XXIII Международный симпозиум Нанофизика и наноэлектроника", Нижний Новгород, 11-14 марта 2019 г. Pежимы колебаний в одномерной цепочке джозефсоновских контактов с нелокальной запаздывающей связью

2019 ◽  
Vol 89 (11) ◽  
pp. 1639
Author(s):  
М.А. Галин ◽  
В.В. Курин
Keyword(s):  
High Frequency ◽  
Electromagnetic Coupling ◽  
Wave Regime ◽  
One Dimensional ◽  
Current Voltage ◽  
Josephson Junction Array ◽  
Reverse Branch ◽  
Junction Array ◽  
The One ◽  
Dimensional Series

We performed the numerical investigation of the one-dimensional series Josephson junction array with electromagnetic coupling and taking into account the delay. In general case of nonzero delay the equations for fast and slow phases have been obtained in the high-frequency (HF) approximation. The regimes of oscillations of the junction array have been studied at the different position on the current-voltage characteristic (IVC), including on its reverse branch. The same investigation has been performed for the systems of equations without delay of interaction and for the arbitrary bias current. Several stationary regimes of oscillations have been observed: synchronous oscillations, regime of traveling wave, regime of partial transition of junctions to the superconducting state and also chimera states.

Inductosyn Angle Measurement Method Based on the Pulse Subdivision

2012 ◽  
Vol 241-244 ◽  
pp. 81-85
Author(s):  
Wei Zhou ◽  
Jun Zhang ◽  
Si Qi Wang ◽  
Kai Zhu ◽  
Zi Li Xu
Keyword(s):  
Measurement System ◽  
High Frequency ◽  
High Speed ◽  
Excitation Power ◽  
Angle Measurement ◽  
Measuring System ◽  
Control Voltage ◽  
Display Module ◽  
Angle Measuring ◽  
And Control

For the inductosyn angle measuring system axial angle digital converter integral loop and the VCO linear range restricted problem of tracking speed and control voltage, angle measurement system has been developed, the angle measurement system based on time subdivision method. The system mainly consists of rotary table, excitation power, signal pick-up circuit, FPGA control module, display module, and serial communications modules and host computer. FPGA is used as control core in the angle measuring system, and the high-speed FPGA signal processing has satisfied the measurement requirements. Induction signal is subdivided by high-frequency clock pulse. Angle measuring system has achieved angle measurement and communication functions. The experimental results show that the angle measurement system accuracy is ±3".

scholarly journals Motion Evaluation Of A Wheelchair Prototype For Disabled People

2015 ◽  
Vol 67 (1) ◽  
pp. 44-50
Author(s):  
Ionut Daniel Geonea ◽  
Nicolae Dumitru ◽  
Alexandru Margine
Keyword(s):  
High Speed ◽  
Design Solution ◽  
Prototype Model ◽  
Mechanical Transmission ◽  
Motion Controller ◽  
Disabled People ◽  
Video Cameras ◽  
Experimental Prototype ◽  
Solid Works ◽  
Analysis System

Abstract In this paper is presented the design solution and experimental prototype of a wheelchair for disabled people. Design solution proposed to be implemented uses two reduction gears motors and a mechanical transmission with chains. It’s developed a motion controller based on a PWM technology, which allows the user to control the wheelchair motion. The wheelchair has the ability of forward – backward motion and steering. The design solution is developed in Solid Works, and it’s implemented to a wheelchair prototype model. Wheelchair design and motion makes him suitable especially for indoor use. It is made a study of the wheelchair kinematics, first using a kinematic simulation in Adams. Are presented the wheelchair motion trajectory and kinematics parameters. The experimental prototype is tested with a motion analysis system based on ultra high speed video cameras recording. The obtained results from simulation and experimentally tests, demonstrate the efficiency of wheelchair proposed solution.

scholarly journals Design of the Optimum Execution Stage of Embedded Processors

1970 ◽  
Vol 8 (2) ◽  
pp. 104-112
Author(s):  
Masa-aki Fukase
Keyword(s):  
High Speed ◽  
Design Principle ◽  
Embedded Processors ◽  
Timing Error ◽  
Wave Pipelining ◽  
The One ◽  
Microprocessor Technology ◽  
And Control ◽  
Point Arithmetic ◽  
Speed Characteristic

We describe the optimum design of an execution stage for embedded processors. The execution stage is the core of embedded processors to treat basic applications for multimedia, communication and control. Considering algorithms in running such applications, the design principle of embedded processors is to achieve reliability, precision, low power, high speed and fast throughput altogether. However, it is hard to sufficiently clear the design principle by existing microprocessor technology. The one of difficult issues is the mixed sequence of integer and FP (floating point) arithmetic instructions. The different latencies of these instructions in a processor’s execution stage surely make the pipelined processing disturb and degrade throughput. The solution for this problem in this study is a wave-pipelined MFU (multifunctional unit) that is the multifunctionalization and wave-pipelining of different FUs (functional units). The high speed characteristic of wave-pipeling guarantees the reliability of processor behavior that is free from timing error. Thus, the waved MFU agrees well with overall trade-off design. In order to complement the shortage of the standard CAD tools, we explored the HS/SW (hardware/software) co-design for the waved MFU. Experimental results by using a 0.18-m CMOS standard cell technology showed the usefulness of this approach.

Self-Assembled Low-Resistivity NiSi Nanowire Arrays on Epitaxial Si0.7Ge0.3 on (001)Si

2006 ◽  
Vol 51 ◽  
pp. 42-47
Author(s):  
Wen Wei Wu ◽  
Lih Juann Chen
Keyword(s):  
High Speed ◽  
Nanowire Arrays ◽  
Ordered Structure ◽  
One Dimensional ◽  
Step Bunching ◽  
Low Resistivity ◽  
Catalyst Free ◽  
Self Assembled ◽  
The One

Self-assembled low-resistivity NiSi nanowire arrays have been grown on relaxed epitaxial Si0.7Ge0.3 on (001)Si. The formation of the one-dimensional ordered structure is attributed to the nucleation of NiSi nanodots on the surface undulations induced by step bunching on the surface of SiGe film owing to the miscut of the wafers from normal to the (001)Si direction. Furthermore, the nanodots were connected along individual arrays and turned into nanowires with increasing amount of Ni and a-Si. Since the periodicity of surface bunching can be tuned with appropriate vicinality and misfit, the undulated templates promise to facilitate the growth of ordered, catalyst-free NiSi nanowires with selected periodicity and size for utilization in high-speed Si-Ge nanodevices.

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