Analysis of effective working characteristic of the proportional solenoid

Author(s):  
Lulu Huang ◽  
Hong Ji ◽  
Yi Zhu
2011 ◽  
Vol 230-232 ◽  
pp. 187-191
Author(s):  
Gong Fa Li ◽  
Si Qiang Xu ◽  
Jin Hui Wang ◽  
Jin Tang Yang ◽  
Jian Yi Kong ◽  
...  

The air compressor system is a time-varying, delay and nonlinear complex system, it has a very important sense to ensure that the supply pressure is stable in the compressor control system. According to the working characteristic of air compressor system, the fuzzy control theory, as one of the modern control theories, was applied into the constant pressure control system to design a fuzzy pressure controller. The simulation results show that the controller was more convenient and effective; it has certain directive significance and reference for the other parameter’s control of air compressor system.


2009 ◽  
Vol 508 (1-2) ◽  
pp. 141-147 ◽  
Author(s):  
Yi Liu ◽  
Rui Hu ◽  
Jinshan Li ◽  
Hongchao Kou ◽  
Hongwei Li ◽  
...  

Sensors ◽  
2020 ◽  
Vol 20 (24) ◽  
pp. 7142
Author(s):  
Mirza I. Bichurin ◽  
Roman V. Petrov ◽  
Viktor S. Leontiev ◽  
Oleg V. Sokolov ◽  
Andrei V. Turutin ◽  
...  

The article is devoted to the theoretical and experimental study of a magnetoelectric (ME) current sensor based on a gradient structure. It is known that the use of gradient structures in magnetostrictive-piezoelectric composites makes it possible to create a self-biased structure by replacing an external magnetic field with an internal one, which significantly reduces the weight, power consumption and dimensions of the device. Current sensors based on a gradient bidomain structure LiNbO3 (LN)/Ni/Metglas with the following layer thicknesses: lithium niobate—500 μm, nickel—10 μm, Metglas—29 μm, operate on a linear section of the working characteristic and do not require the bias magnetic field. The main characteristics of a contactless ME current sensor: its current range measures up to 10 A, it has a sensitivity of 0.9 V/A, its current consumption is not more than 2.5 mA, and its linearity is maintained to an accuracy of 99.8%. Some additional advantages of a bidomain lithium niobate-based current sensor are the increased sensitivity of the device due to the use of the bending mode in the electromechanical resonance region and the absence of a lead component in the device.


2017 ◽  
Vol 865 ◽  
pp. 599-604
Author(s):  
Jing Chen ◽  
De Ren Kong ◽  
Ting Wei Gu ◽  
Fei Shang

Quasi-static absolute calibration is using force with semi-sinusoidal pulse to calibrate pressure measuring system. The pulse width must be wide enough in order to guarantee the effective bandwidth of frequency spectrum be in the flat section of amplitude-frequency characteristics of the tested system. In this way, the result is similar to that from static calibration. The working characteristic parameters for measuring system which is gained from quasi-static calibration is different form static calibration in species, physical meanings and attainment methods. Therefore, the research is of great significance in forming quasi-static calibration system and improving measurement accuracy. The pilot scheme will be introduced in this essay. What is more, the calculation of working characteristic parameters for measuring system will be discussed by taking the force with specific pulse as example, including sensitivity when force transfer to pressure, linearity and repeatability which are used to evaluate the uncertainty of measurement.


Author(s):  
Jaroslaw Milewski ◽  
Andrzej Miller ◽  
Ewa Mozer

The possibility of using a μ-fan in tubular SOFC module is shown. The μ-fan is placed instead of the ejector and has the same role. Main advantages of this new solution are: lower power demanded by fuel compressor (blower), more stable working characteristic, and possibility of control of re-cycled part of anode gas during part load operation. Comparison of two SOFC Modules: with and without the ejector is also shown and commented.


2011 ◽  
Vol 216 ◽  
pp. 163-166
Author(s):  
Li Li ◽  
Jian Liu ◽  
Yue Long Yang

According to the system’s working character, it presents a design scheme of distributed network group control system, which combines the testing power source and unit control system. The paper also describes in detail the equivalent circuit algorithm for motor working characteristics calculation and the nonlinear least square method for experiment curve fitting. By taking full advantage of VB in user interface developing, the system is very convenient for curve fitting for motor type testing, and testing result printing, which intelligentize measurement of motor working characteristic.


In this research, we suggest a novel Fully/Convolutional/Neural/Network/(F-C-N) engineering meaning to help the identification of variations from the norm, for example, polyps, ulcers, also blood, in gastrointestinal (G/I) endoscopy pictures. The projected engineering, termed Look-Behind/MFCN/(LB-MFCN), is fit for removing multi-scale picture includes through utilizing squares of similar convolutional coatings with various channel sizes. These squares are associated through Look-Behind (LB) associations, so the highlights they produce remain joined through highlights removed since behind layers, accordingly protecting the particular data. Besides, it has fewer open, limitations than regular Convolutional/Neural/Network-(C/N/N) structures, which creates it reasonable on behalf of preparing through littler datasets. This is especially valuable in restorative picture examination subsequently information accessibility is generally restricted payable to ethicolegal limitations. The presentation of LB-MFCN is assessed on together adaptable also remote case endoscopy datasets, arriving at 99.82% as well as 95.50%, as far as Area Beneath accepting working Characteristic individually.


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