A New Method for Roundness Control in Taper Turning Using FCC Techniques

2000 ◽  
Vol 123 (4) ◽  
pp. 567-575 ◽  
Author(s):  
Eric H. K. Fung ◽  
S. M. Yang
Keyword(s):  
Real Time ◽  
Error Compensation ◽  
Experimental Results ◽  
New Method ◽  
Two Dimensional ◽  
Turning Operations ◽  
Roundness Error ◽  
Compensatory Control ◽  
Modeling And Forecasting ◽  
Arma Modeling

This paper describes a methodology of online measuring and compensating spindle error motions without using a precalibrated master. The method is based on a combination of forecasting compensatory control (FCC) and error separation techniques. The real time recursive ARMA modeling technique is used for the modeling and forecasting of workpiece errors while the error compensation is performed by means of two-dimensional piezo-actuated tool movements. Experimental results have shown that an improvement of 42–47 percent was achieved for the roundness error of workpieces in the taper turning operations.

On-Line Roundness Error Compensation via P-Integrator Learning Control

1992 ◽  
Vol 114 (4) ◽  
pp. 476-480 ◽  
Author(s):  
C. J. Li ◽  
S. Y. Li
Keyword(s):  
Error Compensation ◽  
Learning Control ◽  
Experimental Results ◽  
Compensation Scheme ◽  
Research Project ◽  
Turning Operations ◽  
Roundness Error ◽  
Cnc Lathe ◽  
On Line ◽  
Metrology System

The work described is the result of a research project for developing a roundness error compensation scheme in turning processes based on the p-integrator learning controller and an on-line metrology system. The objective is to eliminate the repeatable error in turning operations. The scheme was realized on a CNC lathe. The effectiveness of the scheme is supported by the experimental results obtained through workpiece inspections.

A Two-Dimensional Fast Tool Servo Used for Real Time Error Compensation in Taper Turning

2006 ◽  
Vol 315-316 ◽  
pp. 551-555
Author(s):  
Dong Gao ◽  
Ying Xue Yao ◽  
Zhe Jun Yuan
Keyword(s):  
Real Time ◽  
Error Compensation ◽  
Control Technique ◽  
Two Dimensional ◽  
Fast Tool Servo ◽  
Time Error ◽  
Leaf Springs ◽  
Machining Errors ◽  
Compensatory Control ◽  
On Line

In this paper, a two-dimensional (2D) fast tool servo driven by piezoelectric actuators for real time error compensation in taper turning is described. A 2D tool post is made with a new structure with three leaf springs for each axis and its mounting platform positions at a corner, which makes it convenient for mounting the cutter. A control technique, “Forecasting Compensatory Control” (FCC), is implemented to perform an on-line prediction of the machining errors encountered. The on-line cutting experimental results have verified that an improvement of about 40% was achieved for roundness error of the workpiece in the taper turning operation by using the developed control algorithm.

scholarly journals Parameter Measurement of Biaxial Braided Composite Preform Based on Phase Congruency

2019 ◽  
Vol 19 (1) ◽  
pp. 8-16
Author(s):  
Zhitao Xiao ◽  
Lei Pei ◽  
Fang Zhang ◽  
Ying Sun ◽  
Lei Geng ◽  
...  
Keyword(s):  
Automatic Measurement ◽  
Detection Algorithm ◽  
High Accuracy ◽  
Block Matching ◽  
Experimental Results ◽  
Corner Detection ◽  
New Method ◽  
Two Dimensional ◽  
Phase Congruency ◽  
Braided Composite

Abstract In this paper, a new method based on phase congruency is proposed to measure pitch lengths and surface braiding angles of two-dimensional biaxial braided composite preforms. Lab space transform and BM3D (block-matching and 3D filter) are used first to preprocess the original acquired images. A corner detection algorithm based on phase congruency is then proposed to detect the corners of the preprocessed images. Pitch lengths and surface braiding angles are finally measured based on the detected corner maps. Experimental results show that our method achieves the automatic measurement of pitch lengths and the surface braiding angles of biaxial braided composite preforms with high accuracy.

Research on Speed Monitoring and early Warning Method for Vehicles Based on RFID Sensor Tag

2010 ◽  
Vol 44-47 ◽  
pp. 466-470
Author(s):  
Jiang Yuan ◽  
Kui Yan ◽  
Zi Xue Qiu ◽  
Jian Xin Shao
Keyword(s):  
Real Time ◽  
Early Warning ◽  
Experimental Results ◽  
New Method ◽  
Vehicle Speed ◽  
Control Center ◽  
Average Speed ◽  
Identity Information ◽  
Monitoring And Early Warning

A new method was proposed for vehicle speed monitoring and early warning based on RFID sensor tag technology to realize real-time speed monitoring in high way. The principle of speed monitoring, the hardware and software of RFID sensor tag and reader network using GPRS technology were introduced in detail. Experimental results show that the actual velocity of vehicles can be acquired by on board RFID sensor tag, when the vehicle drives over the limited speed, the system can voice alarm to the driver. The identity information, actual speed and time of vehicle are read wirelessly by readers installed along the roadside, these messages can be upload to control center through GPRS network to monitor vehicle states, such as the position, average speed, the flow of transportation and so on.

Transesophageal real-time two-dimensional Doppler echography—a new method for the evaluation of azygos venous flow

1988 ◽  
Vol 34 (2) ◽  
pp. 125-128 ◽  
Author(s):  
Minoru Sukigara ◽  
Toshiro Komazaki ◽  
Masahiko Ohata ◽  
Takashi Matsomoto ◽  
Ryozo Omoto
Keyword(s):  
Real Time ◽  
New Method ◽  
Two Dimensional ◽  
Venous Flow ◽  
Doppler Echography

Amphetamine Detection Based on Surface Plasmon Resonance Techniques

2010 ◽  
Vol 143-144 ◽  
pp. 1056-1058 ◽  
Author(s):  
Yu Bao ◽  
Bo Li ◽  
Yi Ran Guan ◽  
Gui Fu Yang
Keyword(s):  
Molecular Structure ◽  
Surface Plasmon Resonance ◽  
Real Time ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
High Sensitivity ◽  
Experimental Results ◽  
New Method ◽  
Label Free

This paper introduced a new method for detection of amphetamine based on the Surface Plasmon Resonance (SPR) techniques. Experimental results show that SPR is approved to be a suitable approach for detection of amphetamine due to its unique properties such as label-free, real-time, high sensitivity, etc. By introducing such a SPR detection, 10μg/ml amphetamine could be easily detected and compounds with similar molecular structure are also expected suitable for SPR detection.

A New Method to Control and Monitor a 6 D.O.F. Robot Arm

2012 ◽  
Vol 236-237 ◽  
pp. 297-301
Author(s):  
Yan Ming Pei ◽  
Kai Li ◽  
Yun Hong Liu
Keyword(s):  
Real Time ◽  
Wireless Network ◽  
Monitoring System ◽  
Experimental Results ◽  
Host Computer ◽  
New Method ◽  
Robot Arm ◽  
Servo Motor ◽  
Verilog Hdl ◽  
Upper Computer

This paper mainly talks about the design of a controlling and monitoring system of the robot arm based on FPGA. The robot arm has 6 DOFs (Degree of Freedom). Every joint was driven by a servo motor. These servo motors were located as the finger, the wrist, the three arms and a rotatable platform. The FPGA programs were completed using the Verilog HDL. We programmed a LabVIEW VI to function as a controlling center. The data between PC and FPGA were transported through a ZigBee wireless network which consisted of 2 XBee devices and a wireless camera. They were used to monitor the moving condition of the arms. The experimental results show that the robot arms move with no apparent delay controlled by the host computer. The real-time display of the arm’s status is realized by the upper computer.

Research on a Method of PID Error Compensation in Turning

2012 ◽  
Vol 452-453 ◽  
pp. 110-115
Author(s):  
Zhuo Li ◽  
Jun Lu ◽  
Yu Kun Wang
Keyword(s):  
Error Compensation ◽  
Experimental Results ◽  
New Method ◽  
Compensation Model ◽  
Probe Radius ◽  
Computer Aided ◽  
New Processing

An error compensation model in turning based on PID adjustment was investigated in this paper. A new method is proposed to eliminate the effects of probe radius. Simultaneously, PID error compensation model is used to regulate the comprehensive error to obtain the actual quantity of error compensation. Computer-aided technology is applied to complete the algorithm, and then a new processing path is generated. The experimental results indicate that the precision of workpiece can be improved from 0.01mm to 0.003mm after three steps of error compensation.

A New Method for Dynamic Position Measurement While Drilling String Rotating

2012 ◽  
Vol 152-154 ◽  
pp. 1102-1105 ◽  
Author(s):  
Quan Jin Yang ◽  
Xin Zuo ◽  
En Huai Lin
Keyword(s):  
Real Time ◽  
Experimental Results ◽  
New Method ◽  
Measurement Technology ◽  
Position Measurement ◽  
Theoretical Derivation ◽  
Oil Drilling ◽  
Drilling String ◽  
Measurement While Drilling ◽  
Technology Solution

This paper describes the commonly used for oil drilling directional sensor’s structure and the measured parameters, provides a method for dynamic position measurement while drilling string rotation, detailed analyzes on how to calculate a real time accurate gravity tool face based on a precisely theoretical derivation, and the calculated value by this method verified by experimental results. This article provides a measurement technology solution for any rotary steerable tool developing and it can be applied to such a purpose.

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