Chemical Technology, Control and Management


The paper considers the problem of measuring the rotational speeds of spindles of a cotton picking machine, using the method of counting the number of observed pulses within a given time interval with a constant width. Calculation of the quantization error with a change in the rotational speed is carried out. It is established that the relative error of the chosen control method is a function of the speed of rotation itself. The calculation of the error is carried out and the results of the modulation of rotational speeds at various rotational speeds of the spindles are shown graphically. It is established that in the regions of medium and higher rotational frequencies the quantization error is in an acceptable region, and at a low rotation speed the error amplitude becomes higher than the permissible value.

First Page


Last Page



1. R.M. Kennel, “Why do incremental encoders do a reasonable good job in electrical drives with digital control,” Proceedings of the 41st IEEE Industry Applications Society Annual Meeting, Tampa, FL, USA, Volume 2, 8÷12 October, 2006, pp. 925÷930.

2. B.J. Brunsbach, G. Henneberger, Th. Klepsch, “Speed Estimation with Digital Position Sensor,” Proceedings of the International Conference on Electrical Machines (ICEM’92), Manchester, 1992, pp. 577÷581.

3. N. Ekekwe, R. Etienne-Cummings , P. Kazanzides, “Incremental Encoder Based Position and Velocity Measurements VLSI Chip with Serial Peripheral Interface,” Proceedings of the IEEE International Symposium on Circuits and Systems (ISCAS’2007), New Orleans, LA, USA, 27-30 May, 2007, pp. 3558÷3561.

4. E`.Uljaev,U.M. Ubaydullaev i dr. “Ustroystvo dlya kontrolya skorostey vrasch'eniya shpindeley hlopkouborochnoy mashiny'”. Ihtiroga patent. № IAP 05526. Agentstvo po intellektual'noy sobstvennosti Respubliki Uzbekistan, 2014.

5. G. Liu, “On Velocity Estimation Using Position Measurements,” Proceedings of the American Control Conference, Anchorage, AK, May 8÷10, 2002.

6. R.C. Kavanagh, “Improved Digital Tachometer With Reduced Sensitivity to Sensor Nonideality,” IEEE Transactions on Industrial Electronics, Vol. 47, No. 4, August 2000.

Included in

Engineering Commons