A two-degree-of-freedom control scheme for improved performance of unstable delay processes

2010 ◽  
Author(s):  
Dola Gobinda Padhan ◽  
Somanath Majhi
Keyword(s):  
Degree Of Freedom ◽  
Control Scheme ◽  
Improved Performance ◽  
Two Degree Of Freedom

Application of Robust Two Degree-of-Freedom Control Using μ-Synthesis to the Vibrations in Vehicle Engine-Body System

1999 ◽  
Author(s):  
J. Yang ◽  
Y. Suematsu ◽  
S. Shimizu ◽  
Y. Okumura
Keyword(s):  
Degree Of Freedom ◽  
Lms Algorithm ◽  
Body System ◽  
Engine Vibration ◽  
Vehicle Engine ◽  
Control Scheme ◽  
Parameter Variations ◽  
Active Vibration ◽  
Feedforward Controller ◽  
Two Degree Of Freedom

Abstract This paper presents a robust active control for the vehicle engine-body system. The robust two degree-of-freedom (2DOF) controller is formed by combining a feedback (FB) controller with a feedforward (FF) controller. The feedback controller is designed by μ-synthesis to attenuate the effect of engine vibration disturbance by modeling the vehicle engine-body system as a nominal four degree-of-freedom vibration system with the parameter variations and the unmodeled dynamics. Based on filtered-X LMS algorithm, an active vibration controller is used as a feedforward controller to improve control performance further. To demonstrate the effectiveness of the control scheme, we have made some experiments in an experimental device, which is designed to imitate real vehicle engine-body system.

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