Authors:
Liyu Ouyang
1
;
Jinhua She
2
;
Min Wu
1
and
Hiroshi Hashimoto
3
Affiliations:
1
Central South University and Hunan Engineering Laboratory for Advanced Control and Intelligent Automation, China
;
2
Tokyo University of Technology, Japan
;
3
Advanced Inst. of Industrial Tech., Japan
Keyword(s):
Compensation of Nonlinearity, Dead Zone, Distortion Factor, Equivalent Input Disturbance (EID), Nonlinearity.
Related
Ontology
Subjects/Areas/Topics:
Informatics in Control, Automation and Robotics
;
Nonlinear Signals and Systems
;
Signal Processing, Sensors, Systems Modeling and Control
Abstract:
This paper considers the problem of the compensation of an unknown dead zone in the input of a plant. A new compensation method is presented based on the estimation of an equivalent input disturbance (EID). Unlike other methods, this method does not require the exact information of a dead zone. First, we consider the dead zone as an input-dependent disturbance and employ an EID estimator to estimate it. Then, we incorporate the estimate in the control input and compensate the effect of the dead zone almost completely. Simulation results demonstrate the validity of the method.