FEATURES OF THE ANGULAR SPEED DYNAMIC MEASUREMENTS WITH THE USE OF AN ENCODER
Vasyl Kukharchuk
Vinnytsia National Technical University (Ukraine)
http://orcid.org/0000-0001-9920-2726
Waldemar Wójcik
Lublin University of Technology (Poland)
http://orcid.org/0000-0002-6473-9627
Sergii Pavlov
psv@vntu.edu.uaVinnytsia National Technical University (Ukraine)
http://orcid.org/0000-0002-0051-5560
Samoil Katsyv
Vinnytsia National Technical University (Ukraine)
http://orcid.org/0000-0003-1375-5229
Volodymyr Holodiuk
Vinnytsia National Technical University (Ukraine)
http://orcid.org/0000-0002-2449-5488
Oleksandr Reyda
Vinnytsia National Technical University (Ukraine)
http://orcid.org/0000-0001-8231-6268
Ainur Kozbakova
Almaty Technological University (Kazakhstan)
http://orcid.org/0000-0002-5213-4882
Gaukhar Borankulova
Taraz Regional University M. Kh. Dulaty (Kazakhstan)
http://orcid.org/0000-0001-5701-8074
Abstract
Based on the most significant features of the angular velocity dynamic measurements selected by the authors, the main phases of measuring information transformation were established, which allowed to obtain new mathematical models in the form of transformation function, equations for estimating quantization errors, analytical dependences for measuring range that are initial for modeling physical processes occurring in such digital measuring channels with microprocessor control. The process of converting an analog quantity into a binary code is analytically described, an equation for estimating the absolute and relative quantization error is obtained and a measurement range is established, which provides a normalized value of relative quantization error for angular velocity measuring channels with encoder. For the first time, the equation of sampling error was obtained, and it was proved that the limiting factor of the angular velocity measurements upper limit is not only the normalized value of quantization error, as previously thought, but also the value of sampling frequency fD. Therefore, to expand the measurement range (by increasing the upper limit of measurement), it is proposed not only to increase the speed of analog-to-digital conversion hardware, but also to reduce the execution time of software drivers for transmitting measurement information to RAM of microprocessor system. For this purpose, the analytical dependences of estimating the upper limit of measurement based on the value of the sampling step for different modes of measurement information transmission are obtained. The practical implementation of the software mode measurement information transmission is characterized by a minimum of hardware costs and maximum execution time of the software driver, which explains its low speed, and therefore provides a minimum value of the upper limit measurement. In the interrupt mode, the upper limit value of the angular velocity measurement is higher than in the program mode due to the reduction of the software driver’s execution time (tFl = 0). The maximum value of the angular velocity measurements upper limit can be achieved using the measurement information transmission in the mode of direct access to memory (DMA) by providing maximum speed in this mode (tFl = 0, tDR = 0). In addition, the application of the results obtained in the work allows at the design stage (during physical and mathematical modeling) to assess the basic metrological characteristics of the measuring channel, aimed at reducing the development time and debugging of hardware, software, and standardization of their metrological characteristics.
Keywords:
angular velocity, encoder, quantization, sampling, angular velocity measuring system, transformation functionReferences
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Authors
Vasyl KukharchukVinnytsia National Technical University Ukraine
http://orcid.org/0000-0001-9920-2726
Authors
Sergii Pavlovpsv@vntu.edu.ua
Vinnytsia National Technical University Ukraine
http://orcid.org/0000-0002-0051-5560
Authors
Samoil KatsyvVinnytsia National Technical University Ukraine
http://orcid.org/0000-0003-1375-5229
Authors
Volodymyr HolodiukVinnytsia National Technical University Ukraine
http://orcid.org/0000-0002-2449-5488
Authors
Oleksandr ReydaVinnytsia National Technical University Ukraine
http://orcid.org/0000-0001-8231-6268
Authors
Ainur KozbakovaAlmaty Technological University Kazakhstan
http://orcid.org/0000-0002-5213-4882
Authors
Gaukhar BorankulovaTaraz Regional University M. Kh. Dulaty Kazakhstan
http://orcid.org/0000-0001-5701-8074
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