Analysis of the Characteristics of a Linear Rod Position Sensor of a Tracking Hydraulic Drive Based on Digital Modeling of the Electromagnetic State

The development of tracking hydraulic drives for high forces, movements and frequencies of mechanical action on the tested products is an urgent task, since without these tests it is impossible to put products into serial production. The tracking hydraulic drive is a complex. One of the most important devices in the system is the linear displacement sensor of the hydraulic cylinder rod, which is located in the feedback circuit. The peculiarity of the sensor being developed is that it must provide high accuracy parameters. The purpose of the study is to determine the most effective design of the three most common ones based on digital modeling. Methods: The Ansys Electronics Desktop complex was chosen as a program for digital modeling, which allows modeling electromagnetic processes. The program allows you to create a digital duplicate of the sensor itself and the control system for it. Results: the main characteristics are determined on the digital model: the dependence of the output voltage and the nonlinearity of the output characteristic on the movement of the rod. According to the selected criteria, the best parameters were shown by a sensor with a radial arrangement of windings when placing the primary winding inside and the secondary measuring windings outside. Practical significance: the main practical result of the study is to reduce technical risks before mass production of the sensor. The created digital model is parameterized and can be used to study inductive sensors with other sizes and parameters