Development of controller for position sensor on the base of sine-cosine rotary transformer

Abstract

Background: Sine-cosine rotary transformers, being electromechanical position sensors, have a relatively high accuracy and resistance to harsh operating conditions, which makes them attractive for use in automotive technique and equipment installed on its base. To generate excitation voltages, process measuring signals and calculate, depending on them, the angular position of the axis on which such a sensor is installed, special controllers with software and hardware implementation are designed. Aims: The development of software and hardware for a controller of position sensor which is based on a sine-cosine rotary transformer in the amplitude mode. Methods and materials: Taking into account electromagnetic processes on which the operation of a sine-cosine rotary transformer in the amplitude mode is based, methods of system analysis, methods of developing and debugging software, methods of experimental researches and processing their results were applied. Results: A detailed description of the controller of a sine-cosine rotary transformer in amplitude mode is given, as well as its implementation using microprocessor technology and specialized tools for generating, capturing and processing signals. The structure of the controller software is given, as well as technical solutions are described aimed at improving the accuracy of measuring the angular position and the rational implementation of computational processes. The results of the experimental researches illustrate the achievement of the given purpose. Conclusion: The development of a controller for a sine-cosine rotary transformer in the amplitude mode required the detailed consideration and coordination of electromagnetic, electrical and computational processes, as well as the use of various technical solutions aimed at improving the accuracy of measuring the angular position. The results obtained can be applied in the development of controllers for various electromechanical position sensors.