Reduction of pitch error of micro-prism arrayin the brightness enhancement film bycompensating Z-axis positioning accuracy

2021 ◽  
Author(s):  
Yutao Liu ◽  
DUO LI ◽  
Fei Ding ◽  
Yangong Wu ◽  
Jiadai Xue ◽  
...  
Keyword(s):  
Positioning Accuracy ◽  
Brightness Enhancement ◽  
Pitch Error

Research on the Secondary Compensation Method of the Screw Pitch Error Based on the Laser Interferometer

2014 ◽  
Vol 1061-1062 ◽  
pp. 966-969 ◽  
Author(s):  
Xuan Li Shi ◽  
Huan Lao Liu ◽  
Hao Li ◽  
Can Liu
Keyword(s):  
Laser Interferometer ◽  
Compensation Method ◽  
Ball Screw ◽  
Cnc Machine Tools ◽  
Cnc Machine ◽  
Positioning Accuracy ◽  
Pitch Error ◽  
Negative Effect ◽  
Low Efficiency ◽  
Screw Pitch

The screw pitch error of the ball screw is the primary error source of reducing positioning accuracy during the process of error compensation. When using the laser interferometer compensated the screw pitch error, it was difficult to eliminate the influence of the screw pitch error on the positioning accuracy just by the first compensation .this study proposed the secondary compensation method of the screw pitch error based on the initial compensation. in order to avoid the negative effect of the high prices of the automatic compensation software, the fallibility of the manual compensation and the low efficiency of the manual compensation, this article developed a pitch error rapid compensation software. the experiment result demonstrates that the precision index of the CNC machine tools and the efficiency of compensation can be improved obviously by comprehensive using the secondary compensation method and the pitch error rapid compensation software.

Detection and Compensation of Positioning Accuracy Based on the Laser Interferometer

2014 ◽  
Vol 575 ◽  
pp. 529-532
Author(s):  
Wei Da Ren ◽  
Qiang Cheng ◽  
Li Gang Cai
Keyword(s):  
Control System ◽  
Machine Tool ◽  
Laser Interferometer ◽  
Cnc Machine Tool ◽  
Cnc Machine ◽  
Positioning Accuracy ◽  
Position Accuracy ◽  
Pitch Error ◽  
Frequency Laser

The positioning accuracy of CNC machine tool is the best moving position accuracy which the machine tool can reach under the control of CNC control system. The principles of frequency laser interferometer measurement are described in this paper, and pitch error is compensated by taking DAHE V1500 CNC machine with FANUC system as example. The result shows that the precision of CNC machine tool is effectively improved.

The Study on CNC Machine Tools Reform and Error Analysis

2013 ◽  
Vol 299 ◽  
pp. 16-18
Author(s):  
Xue Peng Liu ◽  
Dong Mei Zhao
Keyword(s):  
Error Analysis ◽  
Error Compensation ◽  
Machine Tools ◽  
Servo System ◽  
Control Program ◽  
Cnc Machine Tools ◽  
Cnc Machine ◽  
Positioning Accuracy ◽  
Pitch Error

The control program and servo system of CNC machine tools is analyzed. By pitch error and quadrant error compensation, the positioning accuracy in X-direction is ± 20 μ m.

О ТОЧНОСТИ ОПРЕДЕЛЕНИЯ КООРДИНАТ ПОДВОДНОГО МОДУЛЯ НА ОСНОВЕ ИЗМЕРЕННЫХ ПАРАМЕТРОВ ДВИЖЕНИЯ БУКСИРУЕМОЙ СИСТЕМЫ

2020 ◽  
Author(s):  
V.V. Kostenko ◽  
Yu.V. Vaulin ◽  
F.S. Dubrovin ◽  
O.Yu. Lvov
Keyword(s):  
Immersion Depth ◽  
Computational Algorithms ◽  
Navigation Systems ◽  
Short Baseline ◽  
Positioning Accuracy ◽  
Underwater Acoustic ◽  
Ground Speed ◽  
Cable Length ◽  
Acoustic Navigation

Буксируемый подводный модуль (БПМ) эффективно используется для решения задач, связанных с координированием подводных объектов, местоположение которых подлежит уточнению в процессе их детальногообследования. При этом большое значение имеет точность определения координат самого буксируемогомодуля относительно судна-буксировщика. Использование гидроакустических навигационных средств, вчастности систем с ультракороткой базой (ГАНС УКБ), ограничено вследствие помех, влияющих на качествосигналов в приемной антенне. Альтернативой служит метод определения координат БПМ на основе данныхтраекторных измерений параметров буксируемой системы. К числу последних относятся расчетные значенияпараметров кабеля связи в установившихся режимах буксировки, значения путевой скорости и путевого углабуксировщика, а также измеренные значения длины кабеля, глубины погружения и курса БПМ. В работе дансравнительный анализ различных вариантов вычислительных алгоритмов, позволяющих получить оценки точности определения координат БПМ в различных режимах стационарной буксировки и при наличии сбоев вработе навигационных средств.The towed underwater module (TUM) is a useful toolfor solving problems of the positioning of the underwaterobjects, the location of which must be clarified during its detailedinspection. Herewith, the accuracy of the determinationof the coordinates of the towed module itself relative tothe towing vessel is essential for such kind of problems. Theuse of underwater acoustic navigation means, the systemswith ultra-short baseline (USBL) in particular, are limiteddue to interference affecting the quality of the signals on thereceiving antenna. As an alternative, the method is proposedfor TUM positioning based on trajectory measurements ofparameters of the towed system, which may include calculatedvalues of communication cable parameters in steadystatetowing modes, values of ground speed and towing angle,as well as measured cable length, immersion depth, andTUM heading. The paper provides a comparative analysisof various versions of computational algorithms, which allowobtaining estimates of the TUM positioning accuracy indifferent modes of stationary towing and in the presence offailures in navigation systems operation.

DEVELOPMENT OF AUTOMATED EVALUATION OF POSITIONING ACCURACY FOR SPECIALIZED NETWORKS’ POINTS IN TRILATERATION NETWORKS

2020 ◽  
Author(s):  
Мурат Газизович Мустафин ◽  
Глеб Андреевич Фролов
Keyword(s):  
Coordinate System ◽  
Visual Basic ◽  
Microsoft Excel ◽  
Positioning Accuracy ◽  
Automated Evaluation ◽  
Visual Basic For Applications ◽  
Multiple Configurations

В данной работе рассмотрен принцип работы созданного алгоритма, позволяющего автоматически определять среднюю квадратическую погрешность планового положения пунктов сетей трилатерации и представлены результаты автоматизации данного процесса при различных конфигурациях сети, с использованием пакетов Microsoft Excel, Visual Basic for Applications. This paper presents automatic solution for evaluating accuracy of positioning for specialized networks’ points in a plane coordinate system. The paper presents results of automation of this process through analysis of multiple configurations of trilateral networks using Microsoft Excel, Visual Basic for Applications.

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