A Modular System for Transmission Error Measurement

1988 ◽  
Vol 202 (6) ◽  
pp. 439-442 ◽  
Author(s):  
J D Smith
Keyword(s):  
Transmission Error ◽  
Modular System ◽  
Belt Drive ◽  
Error Measurement ◽  
Input And Output ◽  
Speed Range ◽  
Toothed Belt ◽  
Synchronous Drive

A modular system of electronics for measuring transmission error with standard rotary optical encoders is described. The system can work flexibly with an overall speed range of the order of a 1000 to 1 by changing the order of the modules and will respond correctly to speed variations in both input and output of a synchronous drive such as a gear, chain or toothed belt drive.

scholarly journals On the Running Noise of Toothed Belt Drive : 2nd Report, Influence of Running Condition and Some Noise Reduction Methods

1971 ◽  
Vol 37 (293) ◽  
pp. 203-211
Author(s):  
Aizoh KUBO ◽  
Toshiaki ANDO ◽  
Susumu SATO ◽  
Toshio AIDA ◽  
Takeshi HOSHIRO
Keyword(s):  
Noise Reduction ◽  
Belt Drive ◽  
Toothed Belt ◽  
Reduction Methods

A New Numerical Algorithm for Transmission Error Measurement at Gears Meshing

2012 ◽  
Vol 472-475 ◽  
pp. 1563-1567
Author(s):  
Ai Jun Xu ◽  
Xiao Zhong Deng ◽  
Jing Zhang ◽  
Kai Xu ◽  
Ju Bo Li
Keyword(s):  
Numerical Algorithm ◽  
Angular Resolution ◽  
Angular Displacement ◽  
Transmission Error ◽  
Comparison Method ◽  
Dynamic Measurement ◽  
Driving Mechanism ◽  
Error Measurement ◽  
Measurement Algorithm ◽  
Constrained Conditions

Many different methods have been developed for the measurement of transmission error (T.E.) at gears meshing. Each strategy improved the measurement performance is based on comparing the phases of sequence signals by counting the number of encoder pulses. The phase comparison method of T.E. is a dynamic measurement algorithm with lower angular resolution and many constrained conditions. This paper presents a new numerical algorithm aimed to provide the high accuracy information of instantaneous T.E. in the form of angular displacement. The analysis approach uses phase shift and demodulation technology in frequency domain to process the signals generated by encoders fixed on the both shaft of the gear driving mechanism. Finally, the algorithm is tested by simulation of gear meshing signal in Matlab software.

New Toothed Belt Matches Various Pulley-Profiles

2000 ◽  
Author(s):  
Frank H. Schaefer
Keyword(s):  
Sound Intensity ◽  
Belt Drive ◽  
Special Test ◽  
Intensity Measurements ◽  
Test Conditions ◽  
Toothed Belt ◽  
Quality Of Motion ◽  
Center Distance ◽  
Dynamometer Test

Abstract This paper examines the possibility of a new toothed belt construction to run in various pulley-types. The measurements from a laboratory dynamometer test stand show the belt life under special test conditions by use of HTD-, STPD- and RPP-pulleys, each with an angle of wrap of 180°. In case of locked center distance the increase of torque causes tooth climbing until belt jumping occurs. The pretension was brought into line with the torque each time the torque was increased and the jumping limit torque was determined. From literature it is expected that the results for the behavior of the HTD- and the RPP-pulley are similar. Another parameter to describe the quality of motion is the noise. Here sound power is a very effective descriptor of how noisy an object is. It was determined from sound intensity measurements for HTD- and STPD-pulleys. The ratio of the toothed belt drive used for the noise measurement was 0.63.

Measurement of Joint Element Transmission Error in a Humanoid Walking Robot

2012 ◽  
Vol 566 ◽  
pp. 348-352 ◽  
Author(s):  
Kiyoto Itakura ◽  
Hitonobu Koike ◽  
Katsuyuki Kida ◽  
Kenji Kanemasu
Keyword(s):  
Humanoid Robots ◽  
Power Input ◽  
Transmission Error ◽  
Error Measurement ◽  
Harmonic Drive ◽  
Walking Robot ◽  
Ether Ether Ketone ◽  
Poly Ether Ether Ketone ◽  
Joint Element ◽  
Ether Ketone

In the present work, a prototype of a joint element to be used in lightweight and compact joints for tall humanoid robots is investigated. The newly developed element consists of a harmonic drive gearing device, a multi axis mechanism and a resin bush. Bushes produced from two kinds of bush materials: poly-ether-ether-ketone (PEEK) and polyacetal (POM) were tested. Furthermore, two testing machines to evaluate the joints were constructed: for the power input-output transmission error measurement and for the investigation of the influence of walking-load on bush wear.

scholarly journals On the Running Noise of Toothed Belt Drive : 2nd Report, Influence of Running Condition and Some Noise Reduction Methods

1971 ◽  
Vol 14 (75) ◽  
pp. 998-1007 ◽  
Author(s):  
Aizoh KUBO ◽  
Toshiaki ANDO ◽  
Susumu SATO ◽  
Toshio AIDA ◽  
Takeshi HOSHIRO
Keyword(s):  
Noise Reduction ◽  
Belt Drive ◽  
Toothed Belt ◽  
Reduction Methods

scholarly journals From Transmission Error Measurements to Angular Sampling in Rotating Machines with Discrete Geometry

2005 ◽  
Vol 12 (2) ◽  
pp. 149-161 ◽  
Author(s):  
Didier Remond ◽  
Jarir Mahfoudh
Keyword(s):  
Discrete Geometry ◽  
Signal To Noise Ratio ◽  
Transmission Error ◽  
Operating Conditions ◽  
Spectral Amplitude ◽  
Error Measurement ◽  
Rotating Machines ◽  
Analysis Window ◽  
Sampling Procedures ◽  
Monitoring And Measurement

The benefits of angular sampling when measuring various signals in rotating machines are presented and discussed herein. The results are extracted from studies on transmission error measurements with optical encoders in the field of power transmissions and can be broadened to include phase difference measurements, such as torsional vibrations, and applied to control, monitoring and measurement in rotating machines with discrete geometry. The main conclusions are primarily that the use of angular sampling enables the exact location of harmonics and, consequently, the obtaining of spectral amplitude components with precision. This is always true even if the resolution of encoders is not directly related to the studied discrete geometry. It then becomes possible to compare these harmonics under different operating conditions, especially when speed varies, without changing any parameters in spectral analysis (window length, spectral resolution, etc.). Moreover, classical techniques of improving signal to noise ratio by averaging become fully efficient in the detection of defective elements. This study has been made possible thanks to the technique of transmission error measurement with optical encoders that allows the comparison of sampling procedures, based on the same raw data.The intensive use of such transducers and the development of an original transmission error measurement technique lead to advocate the use of angular sampling in experimental measurements in rotating machines with discrete geometry.

OS1-3 Engagement of micro gears and development of micro rotary encoder for transmission error measurement

2011 ◽  
Vol 2011 (0) ◽  
pp. 5-6
Author(s):  
Syuhei KUROKAWA ◽  
Yoji UMEZAKI ◽  
Yoji MATSUKAWA ◽  
Osamu OHNISHI ◽  
Michio UNEDA ◽  
...  
Keyword(s):  
Transmission Error ◽  
Error Measurement ◽  
Rotary Encoder

Transmission Error Due to Resonance in Synchronous Belt Drive With Eccentric Pulley

2017 ◽  
Vol 139 (12) ◽  
Author(s):  
Masanori Kagotani ◽  
Hiroyuki Ueda
Keyword(s):  
Transverse Vibration ◽  
Rotation Frequency ◽  
Transmission Error ◽  
The Other ◽  
Belt Drive ◽  
Integer Multiple ◽  
Belt Drives ◽  
Eccentric Shaft ◽  
Synchronous Belt Drive ◽  
Frequency Variations

In synchronous belt drives, it is generally difficult to eliminate pulley eccentricity, because the pulley teeth and shaft hole are produced separately and the pulley is installed on an eccentric shaft. This eccentricity affects the accuracy of rotation transmission, so that the belt tension changes during a single rotation of the pulley. This in turn affects the occurrence of resonance in the spans. In the present study, the transmission error in a synchronous belt drive with an eccentric pulley in the absence of a transmitted load was experimentally investigated for the case in which the spans undergo first-mode transverse vibration due to resonance. The transmission error was found to have a component with a period equal to the span displacement, in addition to a component with a period of half the span displacement. During a single rotation of the pulley, the magnitude of the transmission error increased, and its frequency decreased, with decreasing belt tension. The transmission error exhibited the large value when two frequency conditions were satisfied: one was that the meshing frequency was within the range of span frequency variations due to the eccentricity, and the other was that the minimum span frequency was close to an integer multiple of the pulley rotation frequency. Even if both of these conditions occurred, if the range of span frequency variations due to the eccentricity was larger than 13 Hz, the transmission error could be eliminated by adjusting the belt tension, so that the average span frequency corresponded to the meshing frequency.

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