SVM combined Inversion Control Method in Microbial Fermentation

Microbial fermentation productive process is a kind of high nonlinear system with uncertainty. Some key variables of these systems are difficult to measure, which influence the control and optimism of these systems severely. To realize the control of a microbial fermentation, we adopted right inversion method to linearize and decouple the original system and adopted left inversion method to obtain the directly immeasurable variables. This method combines the left inversion and right inversion to control a system, so it can be called the combined inversion control method. The corresponding controller can be called combined inversion controller. We adopted support vector machine (SVM) together with several differentiators and an integrator to construct the above controller to overcome the problems caused by the severe nonlinear and uncertainty of the microbial fermentation, and an SVM combined inversion controller came into being. The simulation results indicate that, the method presented in this paper can well implement the control of such systems as microbial fermentation with directly immeasurable variables.