Error Model and Simulation to Arbitrary Point of Automobile Panels in Normal Mechanical Parameter Measurement Instrument

2010 ◽  
Vol 152-153 ◽  
pp. 263-268
Author(s):  
Zhen Zhong Sun ◽  
Zeng Hong ◽  
Sheng Gui Chen
Keyword(s):  
Measurement Instrument ◽  
Arbitrary Point ◽  
Differential Method ◽  
Error Model ◽  
Parameter Measurement ◽  
Mechanical Parameter ◽  
Measuring Error ◽  
Model And Simulation ◽  
Total Differential ◽  
Model Transform

By using homogenous coordinate transformation principle and Denavit-Hartenberg analysis method, a measurement kinematics model and a error model to arbitrary point of automobile panels in normal mechanical parameter measurement instrument, which the movement of the probe center is relative to machine reference frame is construct. On the basis of using wielding matrix function total differential method, building up the error delivery relation of parameter error of measuring motion model transform to the probe center, and having verified what be built the error model correctness by simulation. The error is enlarge mainly in the process of delivery from angle error, while length error are very minor in error effects. This research can establish a base for studying the measuring-error of portable type measures instrument and it's measuring accuracy.

Polarization Bias Error Model and Simulation of Fiber-Optic Gyroscope with Double Optical Length

2014 ◽  
Vol 34 (10) ◽  
pp. 1006002
Author(s):  
徐宏杰 Xu Hongjie ◽  
张文艳 Zhang Wenyan ◽  
徐小斌 Xu Xiaobin ◽  
宋凝芳 Song Ningfang ◽  
胡永康 Hu Yongkang
Keyword(s):  
Fiber Optic ◽  
Error Model ◽  
Bias Error ◽  
Fiber Optic Gyroscope ◽  
Optical Length ◽  
Model And Simulation

Error Analysis of 6-DOF Welding Robot

2012 ◽  
Vol 220-223 ◽  
pp. 1111-1115
Author(s):  
Cai Dong Wang ◽  
Xin Jie Wang ◽  
Xue Dong Chen ◽  
Chao Hui Zhang
Keyword(s):  
High Efficiency ◽  
Manufacturing Sector ◽  
Differential Method ◽  
Error Model ◽  
Joint Movement ◽  
Welding Robot ◽  
Quality Stability ◽  
Robot Configuration ◽  
Six Degree Of Freedom ◽  
Robot Position

Welding robot has the advantages that welding quality stability, high efficiency, improving the working conditions of workers, and it is widely applied in the manufacturing sector. A six degree of freedom welding robot configuration is presented in this paper. The kinematics model of the robot is established by DH method and its kinematics was analyzed. At last the error model of the position-pose of the robot end-effecter, produced by the influence of robot joint movement variables deviation and structure deviation, was established by the differential method. The deviation influence on the end-effecter was analyzed by numerical simulation. The results prove the error model is right, and they will provide a reliable basis for robot position error compensation and accuracy optimum design.

Full-Isolation Load Equivalent and Parameter Measurement Instrument Development

2012 ◽  
Vol 229-231 ◽  
pp. 1226-1229
Author(s):  
Jiang Yang ◽  
Jun Liu ◽  
Zhou Chan He
Keyword(s):  
Instrument Development ◽  
Measurement Instrument ◽  
Data Access ◽  
Measurement Precision ◽  
Parameter Measurement ◽  
Graphical Display ◽  
State Test ◽  
Measurement Signal ◽  
Ethernet Network ◽  
Isolation Test

The measurement instrument of Full-Isolation load equivalent and parameter measurement is developed. The composing framework and operating principle are presented. The implement techniques of full-isolation test access are introduced. The load equivalent and parameter measurement instrument is made up general portable computer and test box, which accomplishes the functions of load equivalent, signal test, measurement signal graphical display and the instrument test-self. The isolation test access is consisting of analog signal test access, on-off state test access, 1553B signal test access and Ethernet network data access. By experiment the instrument functions is fulfilled and meet measurement precision.

Kinematic Modeling and Error Analysis for a 3DOF Parallel-Link Coordinate Measuring Machine

2006 ◽  
Vol 532-533 ◽  
pp. 313-316 ◽  
Author(s):  
De Jun Liu ◽  
Hua Qing Liang ◽  
Hong Dong Yin ◽  
Bu Ren Qian
Keyword(s):  
Kinematic Model ◽  
Coordinate Measuring Machine ◽  
Inverse Kinematic ◽  
Differential Method ◽  
Error Model ◽  
Structural Parameter ◽  
Kinematic Modeling ◽  
Position Errors ◽  
Measuring Machine ◽  
Parallel Link

First, the forward kinematic model, the inverse kinematic model and the error model of a kind of coordinate measuring machine (CMM) using 3-DOF parallel-link mechanism are established based on the spatial mechanics theory and the total differential method, and the error model is verified by computer simulation. Then, the influence of structural parameter errors on probe position errors is systematically considered. This research provides an essential theoretical basis for increasing the measuring accuracy of the parallel-link coordinate measuring machine. It is of particular importance to develop the prototype of the new measuring equipment.

Error Analysis of a Non-Contact Parallel Plane Sensor Based on Monte Carlo Method

2014 ◽  
Vol 1022 ◽  
pp. 96-99 ◽  
Author(s):  
Le Ha ◽  
Li Jin Fang
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Method ◽  
High Precision ◽  
Measuring Method ◽  
Differential Method ◽  
Error Model ◽  
High Precision Measurement ◽  
The Monte Carlo Method ◽  
Frequency Distribution Histogram ◽  
Measurement Object

In the project of testing platform, characteristics of the measured object are framework. In view of the difficulties of non-contact high-precision measurement of the planar motion objects, an innovative measuring method is proposed which is based on the combined using of high-precision laser distance sensors. This paper presents the structure of the new sensor and its measuring principle, and established a mathematical model of the measurement object and its error model by using differential method. We use the Monte Carlo method to random sample the random sampling of random variables of the error model; finally combining with the instance; we use the Monte Carlo method to get frequency distribution histogram of the measurement error. Through analysis and calculation of this paper, we prepare for theory for the practical application of this new type of sensor.

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