Development of a laser-based high-precision six-degrees-of-freedom motion errors measuring system for linear stage

2005 ◽  
Vol 76 (5) ◽  
pp. 055110 ◽  
Author(s):  
Chien-Hung Liu ◽  
Wen-Yuh Jywe ◽  
Cheng-Chung Hsu ◽  
Tung-Hui Hsu
Keyword(s):  
High Precision ◽  
Degrees Of Freedom ◽  
Measuring System ◽  
Linear Stage ◽  
Six Degrees Of Freedom

scholarly journals A Gyro-Free System for Measuring the Parameters of Moving Objects

2014 ◽  
Vol 14 (5) ◽  
pp. 263-269 ◽  
Author(s):  
Dimitar Dichev ◽  
Hristofor Koev ◽  
Totka Bakalova ◽  
Petr Louda
Keyword(s):  
Degrees Of Freedom ◽  
Moving Objects ◽  
Measuring System ◽  
Measurement Channel ◽  
Measuring Instruments ◽  
Additional Measurement ◽  
Free System ◽  
Six Degrees Of Freedom ◽  
Measurement Concept

Abstract The present paper considers a new measurement concept of modeling measuring instruments for gyro-free determination of the parameters of moving objects. The proposed approach eliminates the disadvantages of the existing measuring instruments since it is based, on one hand, on a considerably simplified mechanical module, and on the other hand, on the advanced achievements in the area of nanotechnologies, microprocessor and computer equipment. A specific measuring system intended for measuring the trim, heel, roll, and pitch of a ship has been developed in compliance with the basic principles of this concept. The high dynamic accuracy of this measuring system is ensured by an additional measurement channel operating in parallel with the main channel. The operating principle of the additional measurement channel is based on an appropriate correction algorithm using signals from linear MEMS accelerometers. The presented results from the tests carried out by means of stand equipment in the form of a hexapod of six degrees of freedom prove the effectiveness of the proposed measurement concept

Development of a middle-range six-degrees-of-freedom system

2009 ◽  
Vol 224 (4) ◽  
pp. 679-688 ◽  
Author(s):  
W Jywe ◽  
Y-R Jeng ◽  
C-H Liu ◽  
Y-F Teng ◽  
C-H Wu ◽  
...  
Keyword(s):  
Degrees Of Freedom ◽  
Rotation Angle ◽  
Linear Displacement ◽  
Measuring System ◽  
Flexible Structure ◽  
Successful Development ◽  
Flexible Bodies ◽  
Six Degrees Of Freedom ◽  
Middle Range ◽  
Series Of Experiments

This paper describes the successful development of a middle-range six-degrees-of-freedom stage, using the features of a flexible structure. The system includes two parts: a middle-range positioning X— Y stage and a four-degrees-of-freedom stage. The flexible structure of the four-degrees-of-freedom stage is built from two kinds of flexible bodies: circular hinges and a new two-degrees-of-freedom flexible body. The four-degrees-of-freedom stage was designed to compensate movement errors including linear displacement, pitch, and roll errors. The linear displacement reaches 20 mm along the X-axis, 20 mm along the Y-axis, and 5 μm along the Z-axis. The rotation angle around the X-axis (θ x), Y-axis (θ y), and Z-axis (θ z) were all 10 arcsec. A novel six-degrees-of-freedom measuring system was also designed. Precision feedback control is demonstrated in a series of experiments performed using the proposed measurement system.

High-precision quality assurance of robotic couches with six degrees of freedom

2018 ◽  
Vol 49 ◽  
pp. 28-33 ◽  
Author(s):  
Wonjoong Cheon ◽  
Junsang Cho ◽  
Sung Hwan Ahn ◽  
Youngyih Han ◽  
Doo Ho Choi
Keyword(s):  
Quality Assurance ◽  
High Precision ◽  
Degrees Of Freedom ◽  
Six Degrees Of Freedom

Vehicle Ride Quality and Passenger Comfort

1978 ◽  
Vol 22 (1) ◽  
pp. 116-116
Author(s):  
Larry G. Richards ◽  
Ira D. Jacobson
Keyword(s):  
Degrees Of Freedom ◽  
State Of The Art ◽  
Measuring System ◽  
Ride Quality ◽  
Limited Data ◽  
Noise Levels ◽  
Six Degrees Of Freedom ◽  
Marine Vehicles ◽  
Roll Rate ◽  
Temperature And Pressure

The state of the art in ride quality assessment is reviewed. A portable environmental measuring system (PEMS II) has been developed to simultaneously record variation in motion (in all six degrees of freedom), temperature and pressure for various segments of a ride. The results of extensive studies of passenger reactions to diverse vehicles are presented as a set of models relating human comfort ratings to environmental conditions, vehicles studied include aircraft (commuter planes, S-61 helicopter, Boeing 747, Concorde), trains (conventional and special purpose), buses, and cars. Limited data are available on marine vehicles. Models for aircraft involve vertical and lateral accelerations and noise levels; while models for ground based vehicles also involve roll rate.

scholarly journals Development of measuring system for jaw movement with six degrees of freedom motion in rodents

2016 ◽  
Vol 23 (1) ◽  
pp. 32-33
Author(s):  
Emi Moriuchi ◽  
Tomoko Yoshimi ◽  
Ayumi Fujishita ◽  
Aya Nakamura ◽  
Ryo Hamanaka ◽  
...  
Keyword(s):  
Degrees Of Freedom ◽  
Measuring System ◽  
Jaw Movement ◽  
Six Degrees Of Freedom
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