Journal
JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY
Volume 22, Issue 11, Pages 2142-2150Publisher
KOREAN SOC MECHANICAL ENGINEERS
DOI: 10.1007/s12206-008-0707-z
Keywords
Crane system; Robust control; System perturbation; Lyapunov theory
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Funding
- Ministry of Knowledge and Economy, Republic of Korea
- ITRC ( Information Technology Research Center)
- IITA ( Institute for Information Technology Advancement) [IITA-2008-C1090- 0801-0004]
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This paper presents a robust control approach for nonlinear uncertain crane systems with a three DOF framework. We deal with an overhead crane in which a trolley located on the top is moved to x- and y-axes independently. We first approximate the nonlinear system model through feedback linearization transformation to simply construct a PD control and then design a robust control system for compensating control deviation feasibly occurring due to modeling error or system perturbation in practice. An adaptive control rule is analytically derived by using Lyapunov stability theory given bounds of system perturbation. We accomplish numerical simulation for evaluating the proposed methodology and demonstrate its superiority by comparing with the traditional control strategy.
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