Talk 1

Title:

Non-Linear feedback control strategies for Unmanned Air Vehicles

Speaker:
Berksan Serbetci- (University of Twente) visitor in team NEO

Abstract:

Data traffic in cellular networks is rapidly expanding and existing network infrastructures will not be able to support this demand in the upcoming years. An essential bottleneck will be formed by the backhaul links that connect base stations to the core network. A promising means to increase efficiency is to proactively cache data in the base stations. In this work, we develop a distributed asynchronous algorithm for cellular networks to decide which content to store in which cache. We relate our problem to a potential game and our algorithm is derived from the best response dynamics. The algorithm finds the best Nash equilibrium corresponding to the global optimum in most cases of interest, and always performs significantly better than traditional placement policies.

Talk 2

Title:

Non-Linear feedback control strategies for Unmanned Air Vehicles

Speaker:

Jean Marie Kai (OSCAR)

Abstract:

Nonlinear control techniques for fixed aerial vehicles are presented. First a hierarchical control scheme for a class of underactuated robotic vehicles is introduced with global stability and convergence properties based on classical Lyapunov-type design. Practical aspects, as embedded system architecture and implementation techniques are explained, and different methods for hardware in the loop simulation and experimental validation are shown. The position/velocity control loop is then detailed with a highlight on feedforward action that relies on a specific model of aerodynamic forces acting on the aircraft. Finally the solution is adapted to trajectory tracking and path following applications.