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Design of mode-to-mode fuzzy controllers

✍ Scribed by Freeman Rufus; George Vachtsevanos

Publisher
John Wiley and Sons
Year
2000
Tongue
English
Weight
352 KB
Volume
15
Category
Article
ISSN
0884-8173

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✦ Synopsis

The mode-to-mode transition problem involves taking initial states in the start mode to the equilibrium point of the goal mode, where each mode of operation corresponds to an operating regime about an equilibrium point. Like the problem of dynamic transitions between various equilibria, there is no consistent theory that deals with the mode-to-mode transition problem. This paper presents a method of designing mode-to-mode controllers by blending the start and goal mode controllers. The blending gains are determined by the phase portrait assignment algorithm. The phase portrait assignment algorithm is a systematic technique that uses dynamic programming and center-point cell mapping to design fuzzy logic controllers. A hover mode to forward flight mode controller for a small-scale helicopter is synthesized to illustrate the design methodology. Simulation results show that the controller is able to transition stably from hover to forward flight. Finally, sensitivity analysis of the hover to forward flight controller is performed for small parameter perturbations.

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