scholarly journals The Accuracy Detection of Shaft Encoder Based on Twin-Channel Multipole Resolvers

2015 ◽  
Vol 04 (02) ◽  
pp. 41-48
Author(s):  
成 郦
Keyword(s):  
Shaft Encoder

Vibration attenuation of a two-link flexible arm carried by a translational stage

2018 ◽  
Vol 24 (23) ◽  
pp. 5650-5664 ◽  
Author(s):  
Shang–Teh Wu ◽  
Shan-Qun Tang ◽  
Kuan–Po Huang
Keyword(s):  
Feedback Loop ◽  
Control Method ◽  
Flexible Manipulator ◽  
Closed Loop System ◽  
Flexible Arm ◽  
Vibration Attenuation ◽  
Shaft Encoder ◽  
High Frequency Vibrations ◽  
Spatial Derivatives ◽  
Derivatives Of

This paper investigates the vibration control of a two-link flexible manipulator carried by a translational stage. The first and the second links are each driven by a stage motor and a joint motor. By treating the joint motor as a virtual spring, the two-link manipulator can be regarded as an integral flexible arm driven by the stage motor. A noncollocated controller is devised based on feedback from the deflection of the virtual spring, which can be measured by a shaft encoder. Stability of the closed-loop system is analyzed by examining the spatial derivatives of the modal functions. By including a bandpass filter in the feedback loop, residual vibrations can be attenuated without exciting high-frequency vibrations. The control method is simple to implement; its effectiveness is confirmed by simulation and experimental results.

A Wavelength Multiplexed Optical Shaft Encoder

1982 ◽  
Vol 15 (5) ◽  
pp. 176-177 ◽  
Author(s):  
J. P. Dakin ◽  
T. J. Liddicoat
Keyword(s):  
Optical Fibre ◽  
Single Fibre ◽  
Shaft Encoder

A wavelength multiplexed optical shaft encoder using a single optical fibre as the transmission medium between the transducer and the read-out unit is described. A ten bit system has been constructed, giving 0.1% resolution over 360 of arc. It is believed that this is the largest number of channels to date to be wavelength multiplexed into a single fibre waveguide.

Decoding techniques of single-ring absolute photoelectric shaft encoder

2017 ◽  
Vol 46 (4) ◽  
pp. 411007
Author(s):  
苏小刚 Su Xiaogang ◽  
胡晓东 Hu Xiaodong ◽  
肖茂森 Xiao Maosen ◽  
张晓东 Zhang Xiaodong
Keyword(s):  
Single Ring ◽  
Shaft Encoder

An On-Line Asynchronous Digital Control Tutor

1989 ◽  
Vol 26 (4) ◽  
pp. 323-332
Author(s):  
R. M. Duke ◽  
J. A. Gibson ◽  
H. R. Sirisena
Keyword(s):  
Operating Systems ◽  
Digital Control ◽  
Closed Loop ◽  
Digital Processing ◽  
Laboratory Work ◽  
Laboratory Technique ◽  
Shaft Encoder ◽  
On Line ◽  
Theoretical Analyses

Laboratory technique for teaching closed loop digital control of continuously operating systems is introduced. To facilitate the laboratory work, shaft encoder interface units with displays emphasising the digital processing involved have been designed and built. Tutorial theoretical analyses support the laboratory work.

Use of a `look-up' table improves the accuracy of a low-cost resolver-based absolute shaft encoder

1997 ◽  
Vol 8 (3) ◽  
pp. 329-331 ◽  
Author(s):  
S K Kaul ◽  
R Koul ◽  
C L Bhat ◽  
I K Kaul ◽  
A K Tickoo
Keyword(s):  
Low Cost ◽  
Look Up Table ◽  
Shaft Encoder

High resolution optical shaft encoder for motor speed control based on an optical disk pick-up

1998 ◽  
Vol 69 (8) ◽  
pp. 3068-3071 ◽  
Author(s):  
Wei-Hung Yeh ◽  
Warren Bletscher ◽  
M. Mansuripur
Keyword(s):  
High Resolution ◽  
Speed Control ◽  
Optical Disk ◽  
Motor Speed ◽  
Shaft Encoder

Vector control of induction motor without shaft encoder

1992 ◽  
Vol 28 (1) ◽  
pp. 157-164 ◽  
Author(s):  
T. Ohtani ◽  
N. Takada ◽  
K. Tanaka
Keyword(s):  
Vector Control ◽  
Induction Motor ◽  
Shaft Encoder

The Frequency Analysis of the Crankshaft’s Speed Variation: A Reliable Tool for Diesel Engine Diagnosis

2000 ◽  
Vol 123 (2) ◽  
pp. 428-432 ◽  
Author(s):  
D. Taraza ◽  
N. A. Henein ◽  
W. Bryzik
Keyword(s):  
Diesel Engine ◽  
Data Acquisition System ◽  
Angular Speed ◽  
Internal Clock ◽  
Gas Pressure ◽  
Torsional Stiffness ◽  
Complex Nature ◽  
Average Speed ◽  
Speed Variation ◽  
Shaft Encoder

The speed variation of the crankshaft may be easily and accurately measured using a shaft encoder and counting the pulses of the internal clock of the data acquisition system. If the crankshaft would be a rigid body, the variation of its angular speed could be directly correlated to the total gas-pressure torque. Actually, the variation of the crankshaft’s speed has a complex nature being influenced by the torsional stiffness of the cranks, the mass moments of inertia of the reciprocating masses and the average speed and load of the engine. Analyzing only the lower harmonic orders of the speed variation spectrum can filter out the distortions produced by the dynamic response of the crankshaft. The information carried by these harmonic orders permits to establish correlations between measurements and the average gas pressure torque of the engine, and to detect malfunctions and identify faulty cylinders.

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