In steam turbine control and actuation, the valve plays a key role in operability reliability. The electrohydraulic regulating system for valve, usually called servomotor, needs to be reliable high performing under nonlinear excitation interference actual conditions. Currently, servo technology is widely used servomotors. Although this has good performance, it still some technical defects, such...

In this paper an optimal choice of actuator for an electric-type active mass driver (AMD) system for structural vibration control using linear quadratic controller has been developed. It is composed of an electric servomotor and a ball screw. The problems that commonly are associated with hydraulic AMD systems as noise, oil leakage, and laborintensive maintenance can be suppressed using an elec...

The paper is devoted to determining the output parameters of a servomotor, which belongs synchronous machines with permanent magnets, in order further determine characteristics transient modes software package ANSYS Electromagnetics. RMxprt, part Electromagnetics, allows windings, losses, motor performance, but requires filling out form complete set geometric dimensions and winding data. Of cou...

The translational axis is one of the most important subsystems in modern machine tools, as its degradation may result in the loss of the product qualification and lower the control precision. Condition-based maintenance (CBM) has been considered as one of the advanced maintenance schemes to achieve effective, reliable and cost-effective operation of machine systems, however, current vibration-b...

This paper considers a nonlinear constrained optimal control problem (NCOCP) originated from energy optimal trajectory planning of servomotor systems. Solving the exact optimal solution is challenging because of the nonlinear and switching cost function, and various constraints. This paper proposes a method to manage the switching cost function to establish a set of necessary conditions of an N...