Comparison of PID Controller Settings for an Active Bearing Support Controlled Using the LabVIEW Software Environment

This article presents the results of research on a control system for an active bearing support. Optimization of this system was proposed to maximize vibration reduction at the front spindle end and to apply the Ziegler–Nichols criterion to modify PID controller settings. The control algorithm was developed using the National Instrument MyRIO platform. The proposed modifications to the control system were intended to improve the control system’s properties, such as response time and overshoot, as well as to provide more stable spindle operation by reducing transient, abrupt changes in the bearing support stiffness. By modifying the control parameters for the PID control system (kp, Ti, Td) operating in a closed-loop feedback loop, it was possible to meet these assumptions, and the results recorded during the research confirm the effectiveness of the chosen method. Experimental testing verified the correct operation of the control algorithm in a model high-speed spindle. The tests were conducted at a rotational speed of 1000 rpm and with three different equivalent masses mounted on the front spindle end. The presented results of experimental tests on a real test stand demonstrate the correctness of the undertaken actions and ensure effective reduction of vibrations of the front spindle end of the tested system.