This paper proposes a design method of optimal H2 integral servo controller. The optimal H2 integral controller is to establish a way to find the admissible controller such that the controlled plant is stabilized and guarantee to track a constant reference signal while minimizing the close-loop system H2 norm from the disturbance to the controlled output. In this paper the derivative state cons...

The application of control relevant modeling of a radial servo loop in a CD (Compact Disc) player is presented in this chapter. The modeling is based on an identi cation algorithm that uses experimental data obtained from closedloop experiments to nd a low-order feedback relevant linear discrete time model for model-based servo control design. In this procedure a plant model is identi ed in ter...

Small disk drives are inherently designed for portable applications and thus must be able to reject external shock and vibration. This paper expands on previous efforts at using the signal from a rotational accelerometer to minimize the the effects of these disturbances by dealing with several issues that come up: accelerometer beam resonances, low sample rate of the embedded servo on the disk ...

In this paper, the method of modern control approach for the design of controller and observer is used. Other functions such as neural controllers - or fuzzy sliding mode control can be found in this work and the results are compared. First, a dynamic model of the servo valve is intended for the governing equations in state-space form expression are obtained. Due to the system integrator is exp...

Image moments provide an important class of image features used for image-based visual servo control. Perspective zeroth and first order image moments provide a quasi linear and decoupled link between the image features and the translational degrees of freedom. Spherical first-order image moments have the additional desirable passivity property. They allow to decouple the position control schem...

In this paper, via describing function techniques, sliding mode control of DC servo mechanisms is analyzed in the presence of unmodeled dynamics. We first show that, a conventional sliding mode controller with signum function will inevitably generate a limit cycle where a second or higher order unmodeled dynamics exists. A fractional interpolation based smoothing scheme is then proposed to elim...

Hydraulic differential electric servo cylinders are electromechanical tools applicable for driving e.g. manipulators. Actual models are strongly nonlinear, coupled systems of differential equations. In the present paper we propose a new model using fuzzy differential equations under strongly generalized differentiability concept. The key point is a continuous fuzzyfication of the signum functio...

Electric power is mainly derived from a combination of an engine and a motor. The motor converts electrical power into mechanical energy, which is widely used in home appliances and industrial mechanical tools. When addressing specific applications, motor-driven tools generally need to make speed changes or have accurate positioning. In these applications, it is necessary to have a highly effic...

This paper presents a 3D visual servo system using fuzzy controller for the command of a manipulator arm. The vision system is composed of two cameras; the first is installed above the robot, while the second is located on the lateral side of this one. These two cameras need no calibration, thus we can install them in any position and orientation with just the condition that the joints and the ...