Design, Modeling and Simulation of an Innovation Pneumatic High Speed on-Off Valve Based on Giant Magnetostrictive Material

2011 ◽  
Vol 422 ◽  
pp. 243-249 ◽  
Author(s):  
Feng Zhang ◽  
Hao Liu ◽  
Guo Liang Tao ◽  
Wei Zhong
Keyword(s):  
Cantilever Beam ◽  
High Speed ◽  
Mechanical Vibration ◽  
Fast Response ◽  
Magnetostrictive Material ◽  
High Frequency Response ◽  
Giant Magnetostrictive Material ◽  
Dynamic Performances ◽  
Magnetostrictive Actuator ◽  
Large Flow

Based on giant magnetostrictive material, a new design of pneumatic high speed on-off valve is presented in this paper. To settle the problem of balancing fast response and large flow, a cantilever beam is employed as both displacement amplifier and valve spool in the innovation structure of the valve. The dynamic model of the valve is established by analyzing the dynamic performances of the giant magnetostrictive actuator and the cantilever beam, based on the theories of electromagnetism and the mechanical vibration. A simulation on this model is carried out to investigate the performance of the valve. Results of the simulation show that the new pneumatic high speed on-off valve is able to achieve the goal of high frequency response, while satisfying the requirement of a large flow.

Design of Pulsed Jet On-Off Valve Based on Giant Magnetostrictive Actuator

2007 ◽  
Author(s):  
Aihua Meng
Keyword(s):  
High Speed ◽  
Basic Structure ◽  
Magnetostrictive Material ◽  
Structure Selection ◽  
Pulsed Jet ◽  
Advantages And Disadvantages ◽  
Giant Magnetostrictive Material ◽  
Magnetostrictive Actuator ◽  
Speed Response ◽  
Pulse Jet

The pulsed jet device is a kind of device that can jet rapidly with micro flux. Present jet methods cannot fulfill the requirements of a large-flux, high-speed and stability in some applications. Combining with the character of pulsed jet device and the advantage of high-speed on-off valve, a new kind of micro-flux jet device —pulse jet on-off valve was designed. The basic structure and the working theory of the device were introduced first; then the valve was studied in detail on the basis of the requirements of jet speed and flux, including structure selection, rated pressure computation, dimension designing etc.. The advantages and disadvantages of actuators driven by electromagnetic, piezoelectric and giant magnetostrictive material (GMM) were compared, then GMM was chosen to drive the pulsed jet on-off valve. The flux and jet speed response experiments demonstrated that the pulsed jet on-off valve based on giant magnetostrictive actuator (GMA) could fulfill the requirements of application.

The Design of Giant Magnetostrictive Flow Valve and its COMSOL Simulation

2010 ◽  
Vol 160-162 ◽  
pp. 1146-1150 ◽  
Author(s):  
Pei Chen ◽  
Quan Guo Lu ◽  
Ding Fang Chen ◽  
Kun Chen
Keyword(s):  
Fast Response ◽  
Flow Displacement ◽  
Magnetostrictive Strain ◽  
Valve Opening ◽  
Magnetostrictive Actuator ◽  
Comsol Simulation ◽  
Displacement Model ◽  
Large Flow ◽  
Pilot Valve ◽  
Flow Valve

By combining magnetostrictive actuator with flow valve directly, the flow was precisely controlled due to magnetic materials’ properties of fast response (less than 1μs)and large magnetostrictive strain (up to 1500ppm). The structure was designed based on this theory, and the flow - displacement model of valve was established by analyzing the size of the valve opening in different incentive current. The flow field was analyzed through multi-physics analysis software COMSOL. Simulation results showed that, the continuous adjustment and precision control were realized in a certain range of flow in the valve. Therefore, it could not only adjust the flow in micro amount directly, but also can be a pilot valve for high frequency precision large flow valve.

Study on Giant Magnetostrictive Material with Transducer Finite Element Analysis

2013 ◽  
Vol 700 ◽  
pp. 3-6
Author(s):  
Jia Deng
Keyword(s):  
Mathematical Model ◽  
Finite Element ◽  
Intensity Change ◽  
Force Model ◽  
Element Analysis ◽  
Magnetostrictive Material ◽  
Mechanical Coupling ◽  
Output Displacement ◽  
Giant Magnetostrictive Material ◽  
Magnetostrictive Actuator

Giant magnetostrictive transducer in the work show strong magnetic mechanical coupling characteristics and nonlinear characteristics, its magnetic state and mechanical state influence each other, coupling process is very complicated, this paper according to the giant magnetostrictive material features, combined with the magnetic domain theory, establish the super magnetostrictive micro displacement actuator model, Explore stress and magnetic field changes, GMM inner magnetic strength change, and the change of strain. Join based on giant magnetostrictive actuator structure and working principle, from the principle of physics, mathematics phenomenological theory Angle to establish the combination of the mathematical model of giant magnetostrictive actuator: According to the actuator output power and output displacement, combined with the equation of motion establish output displacement - output force model. According to an internal magnetic induction intensity change, establish actuator induction voltage model; According to J-A model magnetization model. By using the finite element theory and the Hamilton principle of minimum potential energy, energy conservation principle to this mathematical model, and analyze the result.

Study on Giant Magnetostrictive Material with Design and Simulation of Displacement Magnifying Mechanism

2013 ◽  
Vol 675 ◽  
pp. 219-226 ◽  
Author(s):  
Fan Zeng ◽  
Jing Jun Lou ◽  
Shi Jian Zhu
Keyword(s):  
Maximum Stress ◽  
Vibration Modes ◽  
Magnetostrictive Material ◽  
Output Displacement ◽  
Harmonic Response ◽  
Giant Magnetostrictive Material ◽  
Statics And Dynamics ◽  
Magnetostrictive Actuator ◽  
Output Characteristics ◽  
The Relationship

In order to make full use of advantages of giant magnetostrictive material and to improve output characteristics of giant magnetostrictive actuator, displacement magnifying mechanism is designed based on flexible hinges. The design parameter of the flexible hinges and strength of material of flexible hinges are calculated. Based on the analysis and comparison, the statics and dynamics analysis was carried on by analytic method and ANSYS12.1 software,the input stiffness, magnifying multiple and the relationship between output displacement and load are calculated,and the stress analysis shows that the maximum stress of magnifying mechanism is less than the maximum allowable stress of materials. The resonance frequency,vibration modes and harmonic response of the mechanism were resulted by Finite element method, and the dynamics parameters of system are get.

Magnetostrictive Actuator Modeling and Placement

2009 ◽  
Vol 83-86 ◽  
pp. 281-288
Author(s):  
M. Sunar ◽  
O. Keles
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Magnetic Fields ◽  
Vibration Control ◽  
Dynamic Behavior ◽  
Cantilever Beam ◽  
Mechanical Systems ◽  
Structural Vibrations ◽  
Magnetostrictive Material ◽  
Magnetostrictive Actuator

Quasi-static equations are presented for a magnetostrictive medium where mechanical and magnetic fields interact with each other. Finite element method is used in conjunction with the Hamilton's principle to deduce equations for the dynamic behavior of the magnetostrictive material. These equations form the basis for the magnetostrictive material to be utilized as a sensor or as an actuator. When used as an actuator, the material can provide enough power to actuate mechanical systems for vibration control. In this work, a cantilever beam with a magnetostrictive actuator is taken to demonstrate the modeling and use of the magnetostrictive actuator in attenuating structural vibrations. The position of the actuator is changed to observe its effect on the response of the system. This is important because it is a well-known fact that the actuator location has impact, sometimes big, on its performance.

Giant Magnetostrictive Material Actuator Based Active Vibration Control-a Modified α - LMS Algorithm

2007 ◽  
Vol 546-549 ◽  
pp. 2219-2222
Author(s):  
Zhao Qing Song ◽  
Shao Lei Zhou ◽  
Xian Jun Shi ◽  
Guo Qiang Liang
Keyword(s):  
Vibration Control ◽  
Controller Design ◽  
Active Vibration Control ◽  
Lms Algorithm ◽  
Experimental Result ◽  
Magnetostrictive Material ◽  
Giant Magnetostrictive Material ◽  
Active Vibration ◽  
Magnetostrictive Actuator ◽  
The Mathematical Model

A modified α-LMS algorithm is presented and is applied to the controller design of active vibration control. A magnetostrictive material actuator is used as experimental equipment for active vibration control in this paper. The merit of the presented method is that it is not necessary to build the mathematical model of magnetostrictive actuator. The experimental result shows that the controller designed is efficient for active vibration control.

Direct Current Deadbeat Predictive Controller for BLDC Motor Using Single DC-Link Current Sensor

2020 ◽  
Vol 38 (8A) ◽  
pp. 1187-1199
Author(s):  
Qaed M. Ali ◽  
Mohammed M. Ezzalden
Keyword(s):  
Control System ◽  
High Speed ◽  
Fast Response ◽  
Bldc Motor ◽  
Current Controller ◽  
Three Phase ◽  
Predictive Controller ◽  
Two Phases ◽  
Dc Current ◽  
Three Phase Inverter

BLDC motors are characterized by electronic commutation, which is performed by using an electric three-phase inverter. The direct control system of the BLDC motor consists of double loops; including the inner-loop for current regulating and outer-loop for speed control. The operation of the current controller requires feedback of motor currents; the conventional current controller uses two current sensors on the ac side of the inverter to measure the currents of two phases, while the third current would be accordingly calculated. These two sensors should have the same characteristics, to achieve balanced current measurements. It should be noted that the sensitivity of these sensors changes with time. In the case of one sensor fails, both of them must be replaced. To overcome this problem, it is preferable to use one sensor instead of two. The proposed control system is based on a deadbeat predictive controller, which is used to regulate the DC current of the BLDC motor. Such a controller can be considered as digital controller mode, which has fast response, high precision and can be easily implemented with microprocessor. The proposed control system has been simulated using Matlab software, and the system is tested at a different operating condition such as low speed and high speed.

scholarly journals Asymmetric Ge/SiGe coupled quantum well modulators

Nanophotonics ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 1765-1773
Author(s):  
Yi Zhang ◽  
Jianfeng Gao ◽  
Senbiao Qin ◽  
Ming Cheng ◽  
Kang Wang ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Quantum Well ◽  
Quantum Wells ◽  
High Speed ◽  
Low Voltage ◽  
Extinction Ratio ◽  
High Frequency Response ◽  
Modulation Format ◽  
Silicon Photonic ◽  
Coupled Quantum Well

Abstract We design and demonstrate an asymmetric Ge/SiGe coupled quantum well (CQW) waveguide modulator for both intensity and phase modulation with a low bias voltage in silicon photonic integration. The asymmetric CQWs consisting of two quantum wells with different widths are employed as the active region to enhance the electro-optical characteristics of the device by controlling the coupling of the wave functions. The fabricated device can realize 5 dB extinction ratio at 1446 nm and 1.4 × 10−3 electrorefractive index variation at 1530 nm with the associated modulation efficiency V π L π of 0.055 V cm under 1 V reverse bias. The 3 dB bandwidth for high frequency response is 27 GHz under 1 V bias and the energy consumption per bit is less than 100 fJ/bit. The proposed device offers a pathway towards a low voltage, low energy consumption, high speed and compact modulator for silicon photonic integrated devices, as well as opens possibilities for achieving advanced modulation format in a more compact and simple frame.

Experimental Investigation During Stall and Surge in a Transonic Fan Stage and Rotor-Only Configuration

2006 ◽  
Author(s):  
A. J. Gannon ◽  
G. V. Hobson ◽  
R. P. Shreeve ◽  
I. J. Villescas
Keyword(s):  
High Speed ◽  
Fast Response ◽  
Pressure Measurements ◽  
Post Processing ◽  
Transonic Compressor ◽  
Compressor Rotor ◽  
The Difference ◽  
Data Signal ◽  
Transonic Fan ◽  
Casing Pressure

High-speed pressure measurements of a transonic compressor rotor-stator stage and rotor-only configuration during stall and surge are presented. Rotational speed data showed the difference between the rotor-only case and rotor-stator stage. The rotor-only case stalled and remained stalled until the control throttle was opened. In the rotor-stator stage the compressor surged entering a cyclical stalling and then un-stalling pattern. An array of pressure probes was mounted in the case wall over the rotor for both configurations of the machine. The fast response probes were sampled at 196 608 Hz as the rotor was driven into stall. Inspection of the raw data signal allowed the size and speed of the stall cell during its growth to be investigated. Post-processing of the simultaneous signals of the casing pressure showed the development of the stall cell from the point of inception and allowed the structure of the stall cell to be viewed.

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