Design on electromagnetic actuator of aerostatic bearing stylus displacement sensor

2016 ◽  
Author(s):  
Junwei Wang ◽  
Suping Chang ◽  
Xiaojun Liu ◽  
Wenlong Lu ◽  
Yanling Sun ◽  
...  
Keyword(s):  
Displacement Sensor ◽  
Electromagnetic Actuator ◽  
Aerostatic Bearing

The Development of High Speed Virtual Milling Test

2017 ◽  
Author(s):  
Akos Miklos ◽  
Denes Takacs ◽  
Richard Wohlfart ◽  
Gabor Porempovics ◽  
Tamas G. Molnar ◽  
...  
Keyword(s):  
Time Delay ◽  
High Speed ◽  
Computational Algorithm ◽  
Displacement Sensor ◽  
Electromagnetic Actuator ◽  
Milling Machine ◽  
Hardware In The Loop ◽  
High Speed Milling ◽  
Real Element ◽  
Workpiece Interaction

The concept of a hardware-in-the-loop experiment for high speed milling is introduced in this paper. The tool-workpiece interaction is virtually implemented in the experiment while the milling machine with the spindle is used as real element. In this paper, the basic components of the experiment are presented, namely, a contactless displacement sensor, a computational algorithm of the cutting force and a contactless electromagnetic actuator are discussed. Experiments on the prototype of the electromagnetic actuator are also shown to illustrate the potential of the concept. A feasibility study of the hardware-in-the-loop experiment is given, where the effect of the time delay included in the experiment is investigated.

An evaluation system of the eccentric orbit of shaft with aerostatic bearing in the microscale

2017 ◽  
Vol 232 (2) ◽  
pp. 155-165
Author(s):  
Dongju Chen ◽  
Jihong Han ◽  
Lihua Dong ◽  
Jinwei Fan ◽  
Chenhui An
Keyword(s):  
Evaluation System ◽  
Optimization Design ◽  
Dynamic Stiffness ◽  
Test System ◽  
Displacement Sensor ◽  
Aerostatic Bearing ◽  
Evaluation Standard ◽  
Shaft System ◽  
Control Equation ◽  
Orbit Model

In order to improve the machining precision of the aerostatic bearing, an eccentric rotor orbit model considering the microscale effects is established. A flow factor Q embodying the effects in the microscale is introduced into the fluid control equation, the dynamic stiffness, and damping coefficients of bearing are calculated considering the microscale effects. According to the actual working condition of the shaft, the modal analysis in both cases (with and without the microscale effects) is performed. And with the modal information, the dynamic orbit in both states (with and without the microscale effects) is described by the deduced orbit model of the shaft system. Finally, experiments of the frequency by LMS vibration test system and shaft orbit by displacement sensor are measured, and the results indicate that the simulated results considering the microscale effects are more similar with the actual experimental one, which provides a guideline and evaluation standard for further optimization design and precision control of the shaft system.

Output Voltage Characteristics of Eddy Current Displacement Sensor for Various Heat Treatments of Measuring Objects

2008 ◽  
Vol 128 (4) ◽  
pp. 289-297 ◽  
Author(s):  
Tsutomu Mizuno ◽  
Shigemi Enoki ◽  
Takashi Asahina ◽  
Takayuki Suzuki ◽  
Hiroyuki Maeda ◽  
...  
Keyword(s):  
Eddy Current ◽  
Output Voltage ◽  
Heat Treatments ◽  
Displacement Sensor

Temperature Invariant Phenomenon in Dual Coil Eddy Current Displacement Sensor: Investigation, Verification and Application

2019 ◽  
Vol 19 (21) ◽  
pp. 9680-9687 ◽  
Author(s):  
Yating Yu ◽  
Hanchao Li ◽  
Ke Xue ◽  
Dahuan Liu ◽  
Geng Gao
Keyword(s):  
Eddy Current ◽  
Displacement Sensor

scholarly journals Design, Analysis, and Experiment on a Novel Stick-Slip Piezoelectric Actuator with a Lever Mechanism

Micromachines ◽  
2019 ◽  
Vol 10 (12) ◽  
pp. 863 ◽  
Author(s):  
Weiqing Huang ◽  
Mengxin Sun
Keyword(s):  
Piezoelectric Actuator ◽  
Simple Structure ◽  
Fast Response ◽  
Displacement Sensor ◽  
Design Parameters ◽  
The Finite Element Method ◽  
Stick Slip ◽  
Lever Mechanism ◽  
Series Of Experiments ◽  
Stator Design

A piezoelectric actuator using a lever mechanism is designed, fabricated, and tested with the aim of accomplishing long-travel precision linear driving based on the stick-slip principle. The proposed actuator mainly consists of a stator, an adjustment mechanism, a preload mechanism, a base, and a linear guide. The stator design, comprising a piezoelectric stack and a lever mechanism with a long hinge used to increase the displacement of the driving foot, is described. A simplified model of the stator is created. Its design parameters are determined by an analytical model and confirmed using the finite element method. In a series of experiments, a laser displacement sensor is employed to measure the displacement responses of the actuator under the application of different driving signals. The experiment results demonstrate that the velocity of the actuator rises from 0.05 mm/s to 1.8 mm/s with the frequency increasing from 30 Hz to 150 Hz and the voltage increasing from 30 V to 150 V. It is shown that the minimum step distance of the actuator is 0.875 μm. The proposed actuator features large stroke, a simple structure, fast response, and high resolution.

Sign in / Sign up

Export Citation Format

Share Document