# zbMATH — the first resource for mathematics

Local model networks based mixed-sensitivity $$H_\infty$$ control of CE-150 helicopters. (English) Zbl 1389.93100
Summary: In this paper, a local model network $$H_\infty$$ control is proposed for CE-150 helicopter stabilization. The proposed strategy capitalizes on recent developments on $$H_\infty$$ control and its promising results in robust stabilization of plants under unstructured uncertainties. CE-150 helicopters are known for their varying operating conditions along with external disturbances. Therefore, local model networks are introduced for their adaptive feature and since they provide a powerful combination of fuzzy logic and conventional linear control techniques to control nonlinear systems without the added computational burden of soft-computing techniques. Using the fact that the system can be linearized at different operating points, a mixed sensitivity $$H_\infty$$ controller is designed for the linearized system, and combined within a network to make transitions between them. The proposed control structure ensures robustness, decoupling of the system dynamics while achieving good performance. A comparison is carried-out against the well-known Proportional-Integral-Derivative (PID) control technique. Results are presented to illustrate the controller’s performance in various operating conditions.
##### MSC:
 93B36 $$H^\infty$$-control 93D21 Adaptive or robust stabilization 93C41 Control/observation systems with incomplete information 93B18 Linearizations
Full Text: