LAR-DEIS Home Page  
Università di Bologna
 
news!
people
activities
equipments
publications
collaborations
past_activities
links
search
 
  > Home > Activities > Nonlinear control
 
 
 

This activity resulted both in theoretical results and applications. In the first side a new technique has been proposed in order to reduce the chattering in the system (DIC, Discontinous Integral Control), while as regards the second side pratical solutions using the DIC have been proposed for electrical motor control.

Sliding Mode Control

Variable Structure Control is more than a promising technique in the field of non-linear control. It permits the realization of very robust and simple regulators, with appealing characteristics (sliding mode) especially if the considered dynamics requires a very short sampling time. Several application of this technique have been developed, mainly in the field of electrical motors control. References.

back to top

Sliding Mode Control Discontinuous Integral Control

On the basis of the both theoretical and applicative experiences gained using Sliding Mode and Binary control, a new control technique has been proposed to face the problem of the robust stabilization of uncertain continuous-time systems. This technique is based on a discontinuous control, such as a VSS, with an additional switching integral part, which makes it possible to track unknown disturbances. A relevant advantage of this technique is that it allows to use control inputs with arbitrary small gains for the main switching part, therefore reducing high-frequency oscillations (chattering) in the system. Both theoretical and applicative interesting results have been obtained, see. Recently, interesting new results have been obtained by extending the Discontinuous Integral Control to the class of Discrete-time controllers. A proper modification of the discretized DIC algorithm which takes into account the ``slope'' of the controlled variable proves to be effective in reducing the system chattering.

back to top

 
 
Copyright © 2000, DEIS - University of Bologna. All rights reserved.
Send an e-mail to the WebMaster