Digital Control Hydraulic Variable Pump Based on Mechatronic-Hydraulic-Air Integration Driven by Compressed Air

2011 ◽  
Vol 291-294 ◽  
pp. 2643-2646 ◽  
Author(s):  
Xiao Ming Sheng
Keyword(s):  
Digital Control ◽  
Simple Structure ◽  
High Reliability ◽  
Hydraulic Cylinder ◽  
Linear Displacement ◽  
Compressed Air ◽  
Displacement Sensor ◽  
Cylinder Piston ◽  
Forced Air ◽  
High Flexibility

This paper introduces digital control hydraulic variable pump based on mechatronic-hydraulic- air integration driven by compressed air. By inserting the toggle force amplifier in between double-acting rodless air cylinder and variable pump, this pump, driven by compressed air, utilizes small forced air to create big output power. The displacement of air cylinder piston is measured by using digitally linear displacement sensor and it is compared with input signal by computer in order to control pressure and flow rate output by hydraulic cylinder. This pump provides high flexibility and high reliability, simple structure and compact; it is easier to control by artificial intelligence and it will be widely used in the industry.

scholarly journals INDUCTIVE LINEAR DISPLACEMENT SENSOR IN ACTIVE MAGNETIC BEARING

2019 ◽  
Vol 3 ◽  
pp. 151
Author(s):  
Sergei Loginov ◽  
Dmitriy Fedorov ◽  
Igor Savrayev ◽  
Igor Plokhov ◽  
Andrey Hitrov ◽  
...  
Keyword(s):  
Control System ◽  
High Speed ◽  
High Reliability ◽  
Magnetic Bearing ◽  
Linear Displacement ◽  
Magnetic Bearings ◽  
Active Magnetic Bearing ◽  
Displacement Sensor ◽  
Main Trend ◽  
Active Magnetic Bearings

Active magnetic bearings are increasingly used in various fields of industry. The absence of mechanical contact makes it possible to use them in ultra-high-speed electric drives. The main trend of active magnetic bearings development is the improvement of the control system. The main problem of the control system is the displacement sensor (most of them has low accuracy and large interference). The sensor must have the following properties: simple in realization, high linearity of the characteristic, high sensitivity and noise immunity, high reliability. At the present time there is no sensor that satisfies all these conditions. Most manufacturers use various kinds of filters to get an accurate position signal. This increases the response time of the control system. Thus, problem of designing and modeling the position sensor, considered in the article is topical.

Synergy of surface textures on a hydraulic cylinder piston

2019 ◽  
Vol 14 (4) ◽  
pp. 424-429 ◽  
Author(s):  
Ying Zhang ◽  
Liangcai Zeng ◽  
Zhenpeng Wu ◽  
Xianzhong Ding ◽  
Kuisheng Chen
Keyword(s):  
Hydraulic Cylinder ◽  
Surface Textures ◽  
Cylinder Piston

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.

An enlarge polymer optical fiber linear-displacement sensor based on constructive interference

2021 ◽  
Vol 63 ◽  
pp. 102481
Author(s):  
Abdul Ghaffar ◽  
Mujahid Mehdi ◽  
YanYun Hu ◽  
Arnaldo G. Leal-Junior ◽  
Abdul Basit ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Linear Displacement ◽  
Displacement Sensor ◽  
Polymer Optical Fiber ◽  
Constructive Interference

scholarly journals Extraction and Filter Algorithm of Guidance Information for Full-strapdown Seeker on Rotation Missile

2018 ◽  
Vol 214 ◽  
pp. 03008 ◽  
Author(s):  
YongShan Liu ◽  
Li Song ◽  
JingLong Li
Keyword(s):  
Kalman Filter ◽  
Extended Kalman Filter ◽  
Simple Structure ◽  
Unscented Kalman Filter ◽  
High Reliability ◽  
Engineering Application ◽  
Line Of Sight ◽  
Light Weight ◽  
Rate Information ◽  
Guidance Information

Strapdown seekers are superior to platform seekers for their simple structure, high reliability and light weight but cannot measure the line-of-sight angle rate information for the guidance of rotation missile directly. This paper aims at the engineering application of full-strapdown seekers on rotation missile problem. Firstly, a line-of-sight angle rate solution model is established. Based on the MATLAB, the extended Kalman filter (EKF) algorithm and unscented Kalman filter (UKF) algorithm are used to estimate the line-of-sight angle rate information of the full-strapdown seekers. The results show that using EKF filter and UKF filter both can obtain effective guidance information and the UKF’s effect is better.

Motion Trajectory Simulation and Measurement of the 5000V Electromagnetic Repulsion Mechanism (ERM)

2012 ◽  
Vol 546-547 ◽  
pp. 368-373
Author(s):  
Jin Wu ◽  
Jin Wu Zhuang ◽  
Yong Hua Zhuang ◽  
Jun Lu
Keyword(s):  
Comparative Analysis ◽  
Simulation Models ◽  
Displacement Transducer ◽  
Linear Displacement ◽  
The Other ◽  
Displacement Sensor ◽  
Motion Trajectory ◽  
Motion Trajectories ◽  
Trajectory Simulation ◽  
Piezoelectric Acceleration

Successful applications of the ERM depend on accurate simulation models. Firstly, we built up a model on the 5000 volts ERM with ansoft. Then we measured motion trajectories of the ERM prototype respectively by means of a piezoelectric acceleration transducer, a magnetic grating displacement transducer and a linear displacement sensor. Based on the comparative analysis of the results from simulation and measurement, we concluded that the simulation model was reliable on one hand, and on the other hand by means of a linear displacement sensor along with a magnetic grating counterpart, we could obtain accurate motion trajectories with a relative error less than 5%.

scholarly journals High precision machining of a displacement sensor for helicoidal motions

2021 ◽  
Author(s):  
Zeina ELRAWASHDEH ◽  
Philippe REVEL ◽  
Christine PRELLE ◽  
Frédéric LAMARQUE
Keyword(s):  
High Precision ◽  
Fiber Optic ◽  
Geometric Model ◽  
Translational Motion ◽  
Surface Characteristics ◽  
Measurement Range ◽  
Linear Displacement ◽  
Displacement Sensor ◽  
Fiber Optic Probes

Abstract This research study presents the design and the high precision manufacture procedure of a fiber-optic displacement sensor. It is composed of two fiber-optic probes associated with a structure of a cones’ grating. The sensor is characterized by its ability to measure the linear displacement for an axis performing a helicoidal motion. This motion has been demonstrated on a high precision lathe; where the spindle provided the rotational motion, associated to a translational motion on the linear stage. This allowed to obtain the two simultaneous motions. The displacement of the translational stage is measured by the sensor in real time.Firstly, a highly precise geometric model of the reflector part for the sensor was developed. This model provided a specific geometry for the cones-assembled grating, which has been precisely manufactured. The geometric parameters and the surface characteristics of each step in the fabricated grating were both identified in situ on the lathe. The agreement between simulation and experimental results is excellent. The performances of the fiber-optic displacement sensor were identified in-situ on the lathe. The analysis of the voltage output signals from the two fiber-optic probes is used to measure the grating displacement. The unbalanced rotation due to non-centered axes was also characterized. The sensor provided a micrometric resolution, on a measurement range of more than one centimeter.

Design of Intelligent Winding Machine for Tassel Thread Based on Stepping Motor

2012 ◽  
Vol 189 ◽  
pp. 317-320
Author(s):  
Hong Shen ◽  
Feng Shao ◽  
Jun Peng Xu
Keyword(s):  
Simple Structure ◽  
Intelligent System ◽  
Rotation Speed ◽  
High Reliability ◽  
Low Cost ◽  
Production Quality ◽  
Stepping Motor ◽  
Precise Control ◽  
Winding Machine ◽  
Thread Problem

On account of the end splitting and dropping thread problem for domestic winding machine during tassel thread production process at present, an intelligent system with subdivision driving module TB6560AHQ and SANYO stepping motor was designed, which adopted the ATMEL89S52 MCU as the core controller. The system achieved precise control of some parameters during the course of tassel thread winding such as torque, direction of rotation, speed, cycle laps, twist, etc. It also reduced the worker’s labour intensity and improved the production quality and efficiency of the tassel manufacturing, moreover, this winding machine has the advantages of simple structure, high torque, high reliability and low cost. It can meet the various control requirements for different tassel thread winding and have a considerable market prospect.

Design and Implementation of High Precision Online Thickness Gauge by Laser Displacement Sensor

2014 ◽  
Vol 568-570 ◽  
pp. 331-335
Author(s):  
Ping He ◽  
Meng Wang ◽  
Chao Liu ◽  
Ying Li
Keyword(s):  
High Precision ◽  
Steel Industry ◽  
High Reliability ◽  
Displacement Sensor ◽  
Laser Sensor ◽  
Thickness Gauge ◽  
Laser Displacement Sensor ◽  
Steel Rolling ◽  
X Ray ◽  
Ultrasonic Thickness

Steel rolling occupies a very important position in the iron and steel industry. The thickness of the steel plate is a crucial index of the quality, so the automatic detection system for high-precision thickness of the steel industry has a vital significance. The traditional thickness instruments have X-ray thickness gauge and ultrasonic thickness meter while the X-ray thickness gauge has radiation which is harmful to human body and ultrasonic thickness has a lower precision. For these shortcomings, a high precision thickness gauge by laser sensor was designed. Presented the differential measurement method based on laser displacement sensor. Then using TMS320F2812 as main control chip designed the hardware of the system. Finally, software programming was completed based on the hardware design. By experiment research, the results show that the laser thickness gauge has advantages of high precision and high reliability. It has a high practical value.

An absolute linear displacement sensor

2019 ◽  
Author(s):  
Chuan Mou ◽  
Yang Liu ◽  
Ziqiang Zhong ◽  
Lingli Peng ◽  
Liang Wu
Keyword(s):  
Linear Displacement ◽  
Displacement Sensor
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