Intriguing nonlinear dynamics of a controller with a sluggish actuator

Authors:
B. D. Coller
Affiliations:
Department of Mechanical Engineering, Northern Illinois University, DeKalb, IL 60115, USA
Venue:
Automatica (Journal of IFAC)
Year:
2003

Citing 2
Cited 0

A simple global characterization for normal forms of singular vector fields

Physica D
Bifurcation analysis of axial flow compressor stability

SIAM Journal on Applied Mathematics

Quantified Score

Hi-index	22.14

Visualization

Abstract

We apply a bifurcation-theoretic approach to the standard Moore-Greitzer compressor model in effort to understand a curious phenomenon. When one forces the actuator to respond sluggishly to commanded inputs, performance of the controller improves dramatically. We show that the behavior can be explained via Hopf-Hopf interactions of surge and rotating stall. Also, we argue that there is a broad class of controllers which possess the general dynamic features responsible for the surprising effectiveness of sluggish actuators.