Model-based versus model-free control designs for improving microalgae   growth in a closed photobioreactor: Some preliminary comparisons
  Controlling microalgae cultivation, i.e., a crucial industrial topic today, is a challenging task since the corresponding modeling is complex, highly uncertain and time-varying. A model-free control setting is therefore introduced in order to ensure a high growth of microalgae in a continuous closed photobioreactor. Computer simulations are displayed in order to compare this design to an input-output feedback linearizing control strategy, which is widely used in the academic literature on photobioreactors. They assess the superiority of the model-free standpoint both in terms of performances and implementation simplicity. 
Sihem Tebbani, Mariana Titica, C\'edric Join, Michel Fliess, Didier   Dumur
cs.SY