UMR CNRS 7253

Site Tools

en:research_activities

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revisionPrevious revision
Next revision		Previous revision
Last revisionBoth sides next revision
en:research_activities [2010/03/08 15:52] – castilloen:research_activities [2010/03/18 09:34] – castillo
Line 5: Line 5:
 I have mainly focused on the following topics: I have mainly focused on the following topics:
  
 +== - Modeling and control of VTOL aircrafts in presence of crosswind ==
 == - Nonlinear control approach based on saturations and Lyapunov analysis == == - Nonlinear control approach based on saturations and Lyapunov analysis ==
 == - Control systems with delay == == - Control systems with delay ==
 == - UAV localization using vision sensors == == - UAV localization using vision sensors ==
 == - Real-time application to flying vehicles == == - Real-time application to flying vehicles ==
 +
 +
 +\\
 +\\
 +
  
 ---- ----
Line 14: Line 20:
 **Abstract:** **Abstract:**
  
-Using saturations function properties and Lyapunov theory, I have developed control laws for two types of flying vehicles, the PVTOL aircraft and the four rotor helicopter. Dynamic models on Euler-Lagrange and Newton-Euler approaches were developed for the quad-rotor helicopter. Afterwards, some algorithms were developed to control system with delay. We have proposed an analysis of stability of a hybrid control algorithm, i.e. the system representation is given in continuous time while the controller is given in discrete time. In order to validate the proposed hybrid control algorithms some real-time experiments were carried out.  Additionally, some vision control strategies were proposed to control an UAV using vision sensors. The obtained results have shown the good performance of the controllers and a new vision embedded system was developed.  Currently, we have obtained a model of the PVTOL taking in account crosswind. A new control strategy has been proposed to stabilize the aircraft in presence of wind. \\ 
-  
  
-== Application to flying vehicles ==+Using saturations function properties and Lyapunov theory, I have developed control laws for two types of flying vehicles, the PVTOL aircraft and the four rotor helicopter. Dynamic models based on Euler-Lagrange and Newton-Euler approaches were developed for the quad-rotor helicopter. Afterwards, some algorithms were developed to control system with delay. We have proposed an analysis of stability of a hybrid control algorithm, i.e. the system representation is given in continuous time while the controller is given in discrete time.   
 + 
 +Additionally, some vision control strategies were proposed to control an UAV using vision sensors. One of the vision systems is composed of a camera, a classical laser line and vision algorithms to compute the distance and the yaw angle of a body with respect to a wall placed in front of the camera frame. The image processing is executed onboard and the obtained measures are, thus, sent to a microprocessor embedded on the helicopter that computes the control strategies (G. Sanahuja thesis).  
 + 
 +Currently, we have obtained a model of the PVTOL taking into account crosswind. A new control strategy has been proposed to stabilize the aircraft in presence of wind (L. Muñoz thesis). 
  
 +All the proposed control strategies are validated in simulations and in real time experiments. And consequently, different aircraft test benchs were conceived.
  
-Many control strategies based on Lyapunov theory have been developed to stabilize the PVTOL aircraft and the four rotor rotorcraft. To test these control algorithms we designed several experimental platforms. 
  
    
  

Page Tools

User Tools

Mentions légales