This paper deals with the development of different control techniques such as Fuzzy, Sliding mode, and Sliding Mode fuzzy controllers for the servo drive system. Servomotors are widely used in industry due to their relatively low cost and high reliability. To get high performances we have to control the input variable in uncertainties and disturbance. Two cases are discussed for each control sc...

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 ...

A dual-stage, fast and fine robotic manipulator is presented. By adopting merits of both coarse and fine actuator, a desirable system having the capacity of large workspace with high resolution of motion is enabled. We constructed an ultra precision XY manipulator with dual-stage structure where the PZT driven fine stage is mounted on the motor driven XY positioner and applied it to fine tracki...

In 1948, when Norbert Wiener published his path breaking work Cybernetics: Communication and Control in the Animal and the Machine, computer technology was in its infancy. Most computers that were needed to implement his ideas were of analog type, certainly in animals but also in machines. They were barely enough for executing simple algorithms, for example for extrapolating stationary time ser...

We de$ne a measure of “observability” of robot motion that can be used in evaluating a hand/eye set-up with respect to the ease of achieving vision-based control. This eztends the analysis of “manipulability” of a robotic mechanism in [9] to incorporate the effect of visual features. We discuss how the observability measure can be applied for active camera placement and for robot tmjectory plan...

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...