Multivariable Control System Design for the Robust
control of Twin Rotor MIMO System using
Quantitative Feedback Theory
Journal:
GRENZE International Journal of Engineering and Technology
Authors:
Ambili Mohan, Gylson Thomas
Volume:
3
Issue:
1
Grenze ID:
01.GIJET.3.1.51
Pages:
68-76
Abstract
This paper focuses on design of multivariable controller for twin rotor MIMO
system (TRMS), a two input two output system with large plant uncertainty using
quantitative feedback theory (QFT) methodology. The various QFT based controller for
TRMS, reported earlier, consider two approaches; cross coupling effects are neglected in
one of them while the other approach employs a decoupler to take into account of the
coupling effects. The objective of this paper is to propose a QFT based diagonal robust
controller by using the multivariable structure of the TRMS, so that the need for a separate
decoupling is completely avoided. Thus the main advantage of this strategy is that the design
procedure is made simpler to meet the time domain tracking specifications and robust
stability requirement in positioning the pitch and yaw angles of the TRMS.