scholarly journals Electromagnetic Suspension Acceleration Measurement Model and Experimental Analysis

Electronics ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 226
Author(s):  
Deshan Kong ◽  
Dong Jiang ◽  
Yanchao Zhao
Keyword(s):  
Proof Mass ◽  
Inertial Sensor ◽  
Measurement Model ◽  
Magnetic Suspension ◽  
Vibration Acceleration ◽  
Acceleration Measurement ◽  
Electromagnetic Suspension ◽  
Frequency Sensor ◽  
The Magnetic Field ◽  
Higher Sensitivity

This paper introduces a prototype of the inertial sensor based on electromagnetic suspension. By analyzing and simulating the change of the magnetic field, the dynamic equation of proof mass has been deduced. The device has the characteristics of a high-frequency accelerometer and a vibration frequency sensor, and the horizontal and vertical frequency ranges of the magnetic suspension acceleration measurement system are 50–500 Hz and 35–650 Hz, and the acceleration measurement ranges are ±3.3 m/s 2 and ±10 m/s 2 , respectively. Compared with the MPU6050 accelerometer, this measurement method has higher sensitivity and retains more vibration acceleration information of the measured object. This paper provides a new idea for the design of the acceleration sensor.

The Unique Property in Magnetic Noise of Spin Modulated Atomic Magnetometer

2018 ◽  
Vol 787 ◽  
pp. 75-80
Author(s):  
Xiao Fei Wang ◽  
Ji Min Li
Keyword(s):  
Magnetic Field ◽  
Conversion Coefficient ◽  
Transverse Relaxation Time ◽  
Unique Property ◽  
Magnetic Noise ◽  
Transverse Relaxation ◽  
Polarization Signal ◽  
Measurement Experiment ◽  
The Magnetic Field ◽  
Higher Sensitivity

This paper presents a spin modulated atomic magnetometer, different from other kinds of atomic magnetometers, the conversion coefficient between the polarization signal and the magnetic field to be measured is independent of the transverse relaxation time, which means that the higher sensitivity can be achieved when polarization is kept constant. For better understanding, the magnetic noise of spin modulated magnetometer is demonstrated and compared to SERF magnetometer. The magnetic noise measurement experiment is designed, the experimental results are consistent with the theoretical prediction. This paper validate the unique property of spin modulated magnetometer and this property will play an important role in guiding the optimization of future experiments.

A dual-axis MEMS capacitive inertial sensor with high-density proof mass

2015 ◽  
Vol 22 (3) ◽  
pp. 459-464 ◽  
Author(s):  
Daisuke Yamane ◽  
Takaaki Matsushima ◽  
Toshifumi Konishi ◽  
Hiroshi Toshiyoshi ◽  
Kazuya Masu ◽  
...  
Keyword(s):  
Proof Mass ◽  
Inertial Sensor ◽  
High Density

Parameter Identification in a Magnetic Suspension Force Transduction System

2019 ◽  
Vol 141 (12) ◽  
Author(s):  
Corey Stambaugh ◽  
Patrick Abbott ◽  
Nicholas Vlajic
Keyword(s):  
Equations Of State ◽  
Force Transducer ◽  
Magnetic Suspension ◽  
Experimental Measurements ◽  
Element Analysis ◽  
Air Mass ◽  
System Parameters ◽  
The Past ◽  
The Magnetic Field ◽  
Force Transduction

Abstract In force transduction systems, magnetic suspension can be used to facilitate the measurement of a force acting between two objects in different environments, namely, between the force transducer in one environment and the test object in another environment. In the past, it has been employed in densimetry and equations-of-state measurements of fluids and gases. An instrument being constructed at the National Institute of Standards and Technology (NIST), referred to as the magnetic suspension mass comparator (MSMC), also employs force transduction between two environments to provide a direct means of vacuum-to-air mass dissemination. Within this work, we discuss the identification, through a combination of finite element analysis and experimental measurements, of the system parameters used for feedback control of the suspension. A Hall effect magnetometer is used to determine the position of the suspended object. Emphasis is placed on experimentally and numerically characterizing the magnetic field and its appropriate gradients to determine the set point of operation. The information presented here is useful for a variety of applications that utilize magnetic suspension for force transduction.

Acceleration measurement model and uncertainty evaluation of 10-6 order precision centrifuge

2015 ◽  
Vol 23 (8) ◽  
pp. 2306-2317
Author(s):  
凌明祥 LING Ming-xiang ◽  
黎启胜 LI Qi-sheng ◽  
张容 ZHANG Rong ◽  
李明海 LI Ming-hai ◽  
宁菲 NING Fei ◽  
...  
Keyword(s):  
Measurement Model ◽  
Uncertainty Evaluation ◽  
Acceleration Measurement

Acceleration Compensating Fuzzy Control in Magnetic Suspension System

2012 ◽  
Vol 468-471 ◽  
pp. 64-68 ◽  
Author(s):  
He Xiang Liu ◽  
Hai Tao Yu ◽  
Min Qiang Hu ◽  
Lei Huang ◽  
Li Yu
Keyword(s):  
Fuzzy Control ◽  
Dynamic Stability ◽  
Degrees Of Freedom ◽  
Suspension System ◽  
Magnetic Suspension ◽  
Linear Dynamics ◽  
Control Approach ◽  
Multiple Degrees Of Freedom ◽  
Electromagnetic Suspension ◽  
Magnetic Suspension System

In this paper, an acceleration compensating control approach is used for dealing with the non-linear dynamics of a multiple degrees of freedom electromagnetic suspension system. This method not only has simple configuration and is implement easily, but also improves the performance of the dynamic stability and the anti-jamming capability. Simulations on the magnetic suspension demonstrated the efficiency of proposed method.

STRUCTURES IN A MAGNETIC SUSPENSION SUBJECTED TO UNIDIRECTIONAL AND ROTATING FIELD

2002 ◽  
Vol 16 (17n18) ◽  
pp. 2279-2285 ◽  
Author(s):  
P. CARLETTO ◽  
G. BOSSIS ◽  
A. CEBERS
Keyword(s):  
Magnetic Field ◽  
Surface Tension ◽  
Thermodynamic Model ◽  
Colloidal Particles ◽  
Average Distance ◽  
Characteristic Size ◽  
Magnetic Suspension ◽  
Order Of Magnitude ◽  
The Magnetic Field ◽  
Rotating Field

Field induced structures are studied inside suspensions of magnetic colloidal particles of micronic size. We have characterized the average distance between aggregates in a thin cell with the magnetic field perpendicular to the plane and also in the presence of a rotating field with the plane of rotation perpendicular to the plane of the cell. The characteristic size of the mesostructure is predicted on the basis of a thermodynamic model. The theory well predicts the experimental results in the uniaxial case but not in the case of ae rotating field; in this last case, the surface tension which is needed to have a good fit is far too low compared to its expected order of magnitude. When the field is uniaxial and sinusoidal we have found a collective instability where all the aggregates are rotating simultaneously in a chaotic way.

A damping constant model for proof-mass structure design of MEMS inertial sensor by multi-layer metal technology

2016 ◽  
Author(s):  
Toshifumi Konishi ◽  
Teruaki Safu ◽  
Katsuyuki Machida ◽  
Daisuke Yamane ◽  
Masato Sone ◽  
...  
Keyword(s):  
Proof Mass ◽  
Inertial Sensor ◽  
Structure Design

Analysis and Optimization Design of Self Magnetic-Suspension Permanent Magnet Linear Synchronous Motor

2011 ◽  
Vol 383-390 ◽  
pp. 4762-4767
Author(s):  
Wu Zhang ◽  
Yi Peng Lan ◽  
Feng Ge Zhang
Keyword(s):  
Permanent Magnet ◽  
Optimization Design ◽  
Synchronous Motor ◽  
Magnetic Suspension ◽  
Feed System ◽  
Nc Machine Tool ◽  
Linear Synchronous Motor ◽  
Nc Machine ◽  
Christoffel Transformation ◽  
The Magnetic Field

In order to eliminate the friction force of linear motor nc machine tool feed system and improve the machining precision, a new Self Magnetic-Suspension Permanent Magnet Linear Synchronous Motor(PMLSM)is putted forward in this paper, which can generate the suspending power by itself. In this paper, the magnetic field distribution is calculated by means of equivalent magnetizing current and Schwarz-christoffel transformation, and is further analyzed and verified by using Finite Element Method. Furthermore, the method of optimizating the length of the primary iron-cored is adopted to design the motor. The experimental results shows that self magnetic suspension -PMLSM can generate thrust and suspending force separately, and the thrust and suspending force are improved by applying optimized method.

SIMULATION MODEL OF A VEHICLE WITH ELECTROMAGNETIC SUSPENSION

2019 ◽  
Author(s):  
Mihail Yaroslavcev ◽  
R. Latyshev ◽  
E. Zemlyakov
Keyword(s):  
Simulation Model ◽  
Dynamic Characteristics ◽  
Air Gap ◽  
Suspension System ◽  
Magnetic Suspension ◽  
Electromagnetic Suspension ◽  
Magnetic Suspension System ◽  
The City

The parameters of the electromagnet in the electromagnetic suspension system of the city transit vehicle are evaluated. A simulation model of the magnetic suspension system which allows studying its dynamic characteristics is created in Simulink. Air gap regulator settings are obtained using the model.

scholarly journals A Micromachined Earth Sensor Based on Measuring the Gravity Gradient Torque

2009 ◽  
Author(s):  
K. Ghose ◽  
H. R. Shea
Keyword(s):  
Proof Mass ◽  
Inertial Sensor ◽  
Low Earth Orbit ◽  
Relative Orientation ◽  
Gravity Gradient ◽  
Earth Orbit ◽  
Optical Access ◽  
The Earth ◽  
Ir Emission

We present the fabrication and testing of a novel MEMS inertial sensor that directly measures the gravity gradient in low Earth orbit in order to sense the relative orientation of a satellite with respect to the Earth. Instead of the current Earth sensing methods that determine the Earth vector by sensing the Earth’s IR emission, we present a much lighter and more compact MEMS-based approach that determine the Earth vector by measuring the Gravity Gradient Torque on an elongated silicon proof mass. Current Earth sensors require optical access on multiple faces of the satellite. This MEMS-based approach does not require optical access.

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