Jin Suzuki

Date of Award


Degree Name

Master of Science


Mechanical and Aerospace Engineering


Mechanical and Aeronautical Engineering

First Advisor

Dr. John Valasek

Second Advisor

Dr. Koorosh Naghshineh

Third Advisor

Dr. James Kamman

Access Setting

Masters Thesis-Open Access


This paper demonstrates the development and performance of A Fuzzy Logic based regulator for an aircraft which is equipped with pneumatic forebody Vortex Flow Controller at high angle-of-attack flight condition. The VFC provides the pilot additional control power at flight conditions where conventional effectors such as rudder and differential flaps lose effectiveness.

Fuzzy Logic Control (FLC) is applied to a mixed bang-bang and conventional type control system. This unique configuration ensures robustness of the system and simplifies the controller design. Performance of the FLC based regulator shows a 10.3% reduction in cost function compared to the system controlled by a Variable Structure Controller. Due to the simplicity of FLC, the designer is able to modify its control law without high level mathematical model of the system.