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Roll control using discrete-time robust sliding hyperplanes and fast output sampling

DSpace at IIT Bombay

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Title Roll control using discrete-time robust sliding hyperplanes and fast output sampling
 
Creator PARKHI, P
BANDYOPDHYAY, B
JHA, M
 
Subject VARIABLE-STRUCTURE CONTROL
MISSILE GUIDANCE
MODE CONTROL
SYSTEMS
DESIGN
 
Description Robustness to unmatched parametric uncertainty is prime requirement of roll control algorithm, especially when it is modelled in discrete time domain and implemented through on-board processor. Sliding mode control is a well established nonlinear control technique, which ensures a robust performance in presence of matched uncertainties and disturbances. In case of the discrete version of sliding mode control, due to finite operational sampling frequency, the system trajectories cannot be forced to slide on the switching manifold. The trajectories remain confined to certain domain around the sliding surface and this is known as Quasi Sliding Mode (QSM) motion. The bound of QSM decides the accuracy and performance of the discrete version of sliding mode. By design, the discrete-time sliding modes are robust to the matched bounded perturbations, however, unmatched perturbations directly affect the boundary layer width and hence the performance of the system. In the present paper, discrete time Lyapunov inequality based sliding hyperplane is designed, which enables robustness to unmatched perturbations arising due to uncertain system matrix A. Further, the requirement of full state-vector for the design of control and sliding surface is met through the multi-rate output feedback (MROF). This control strategy is then demonstrated with application to roll position control of missile with a bandwidth limited actuator. (C) 2013 The Franklin Institute. Published by Elsevier Ltd. All rights reserved.
 
Publisher PERGAMON-ELSEVIER SCIENCE LTD
 
Date 2014-12-28T17:57:00Z
2014-12-28T17:57:00Z
2014
 
Type Article
 
Identifier JOURNAL OF THE FRANKLIN INSTITUTE-ENGINEERING AND APPLIED MATHEMATICS, 351(4)2107-2124
0016-0032
1879-2693
http://dx.doi.org/10.1016/j.jfranklin.2013.04.011
http://dspace.library.iitb.ac.in/jspui/handle/100/17046
 
Language English