Fractional calculus is a generalization of the integration and differentiation to the fractional (non-integer) order. In this paper, for the first time, we devised a fractionalorder adaptive compensation (FO-AC) method for cogging effect minimization for permanent magnetic synchronous motors (PMSM) position and velocity servo system. Cogging effect is a major disadvantage of PMSM. In our FO-AC ...

In this paper, a study of the fabrication of optical microstructures by fast tool servo (FTS) machining technology is presented. The study started from locating the sources of error exclusively involved in ultra-precision machining with FTS, which are stroke error, spatial error, trajectory generation error and errors of cutting parameters such as spindle speed, depth of cut, feed rate, etc. He...

The theory of mechanical antenna is still in its infancy at present, and radiation mechanism, field distribution, modulation methods other basic theories need to be explored improved. mechanism a rotating-magnet based (RMBMA) explored. An equivalent model the established. formula derived using this rotation matrix. spatial direct method also investigated. Two prototype antennas are fabricated D...

We present a learning cerebellar model to control reaching movements of a simulated biomimetic manipulator. The system utilizes the servo mechanism of the spinal re#ex circuitry to allow kinematic control of slow movements while learning predictive dynamic compensation. Key elements of the model are: (1) parallel postural and dynamics controllers; (2) a neural network model explicitly based on ...

In this study, a new servo control system is presented for the overhead crane based on discrete-time state feedback approach. It provides both robust tracking and load swing suppression. Inspired from independent joint and computed torque control in robot manipulator field, a new model is derived in which the crane actuators are considered as the main plant. The crane nonlinearities are then tr...

In this paper, based on feedback linearization control method and using a special PI (propotational integrator) regulator (IP) in combination with a feed-forward controller, a three-phase induction servo-drive is speed controlled. First, an observer is employed to estimate the rotor d and q axis flux components. Then, two input-output state variables are introduced to control the dynamics of to...

This paper proposes a new approach to disturbance estimation based on a curvature model to improve the disturbance rejection performance of a servo system. The main feature is that the stability of the control system is guaranteed when the disturbance estimation is incorporated directly into the designed control law. Simulation results show that disturbances are rejected efficiently when this a...

Pneumatic servo actuators are characterized by highly nonlinear dynamics, and as such are well suited to the use of nonlinear control methods requiring measurement of the full state, such as sliding mode control. The requirement of pressure measurement, however, is particularly burdensome, due in large part to the high cost of pressure sensors relative to other components of the servo system. S...