Systems Active Control work-group

The purpose of this working group is to develop control algorithms specifically dedicated to problems encountered in the realm of active control and active filtering, i.e. algorithms which tend to minimise multi-sinusoidal disturbances. Those problems are of particular importance in electrical networks, vibration control, fluid mechanics, and so on. The idea is to use a second active device to reduce the disturbances affecting the initial process.

The scientific community has perfectly understood the interest of the feedback synthesis and thus of the  control theory in the design of active control laws, these laws replacing the classic passive devices or simply working in addition to them.

Therefore, the «Active Control» working group investigates the control theory and tries to take benefit of its recent developments to establish original control laws which are especially adapted to active control or active filtering. The working group can rely on the theoretical research led in the whole of «Automatic Control and Systems» team of the LIAS and can face this research to practical applications, in collaboration with concerned community.

The main topics and used methods currently include:

  • Persistent disturbances rejection (nonstationary, multi-sinusoidal)  through internal model control; 
  • Modelling of systems with sinusoidal perturbations through quaternionic approach; 
  • Frequency band active Controller (frequency domain approach); 
  • H2/Hinf Controllers; 
  • LPV systems and S-procedure approach.

On the application point of view, we are interested in the following areas:

  • Electrical Engineering (power systems, control of electrical machines, wind ...); 
  • transport (Hybrid Electric Vehicle), especially through the hybrid bench at the University of Poitiers; 
  • Mécanique des fluides (contrôle des écoulements turbulents).

Keywords: Active control, frequency band controllers, LMI, LPV, quaternion, active filtering, active vibration control, hybrid control.