Nonstationary Optimal Servo Control Realizing Smooth Switching from Velocity Servo to Position Servo

A Switching Approach to Visual Servo Control

In the recent past, many researchers have developed control algorithms for visual servo applications. In this paper, we introduce a new switching approach, in which a high-level decision maker determines which of two lowlevel visual servo controllers should be used at each control cycle. We introduce two new low-level controllers, one that relies on the homography between initial and goal image...

Velocity Control of Electro Hydraulic Servo System by Tracking Method

This paper proposes an efficient Tracking method for velocity control of an electro-hydraulic servo system (EHSS) in the presence of flow nonlinearities and internal friction. The tracking method controller is a kind of feedback error learning structure. In the proposed method, the Feedback Error Learning (FEL) algorithm is used to control the velocity. There is no need to compute the system ja...

Potential Switching Control in Visual Servo

Stability of feature-based visual seruo controllers proposed so far is local.' The initial features far from the reference may converge to features diflemnt from the reference or even worse they may not converge. In this paper, stability of feature-based visual servo is considered by using potential. The stable region is visualized and artificial potential switching is proposed to extend the st...

Precise Position Control of a Pneumatic Servo Table System Consideration Dynamic Characteristics of Pneumatic Servo Valves

The performance of the pneumatic servo systems improved greatly as the pneumatic servo valves became commercially available in the late 1980s. At present, one of the best pneumatic servo valves has a dynamic response of 100 Hz and a spool position accuracy of 2% to the full stroke. By using these pneumatic servo valves, the precise position control by the pneumatic servo system has entered a pr...

Servo Control Design