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A Fractional Adaptation Scheme for Lateral Control of an AGVIndustrial Engineering School, University of Extremadura, Avda. de Elvas, s/n. 06071 Badajoz, Spain, jmarcelo{at}unex.es
Industrial Engineering School, University of Extremadura, Avda. de Elvas, s/n. 06071 Badajoz, Spain
Center for Self-Organizing and Intelligent Systems (CSOIS), Department of Electrical and Computer Engineering, Utah State University, 4120 Old Main Hill, Logan, UT 84322-4120 USA Lateral control of an autonomous guided vehicle is influenced strongly by both the longitudinal speed and the position input command (magnitude of the reference signal) of the vehicle. For that reason some suitable strategies for governing the vehicle are adaptive and robust controllers. In this article, an adaptive scheme which combines a model reference approach with a fractional order adjustment rule for a feedforward gain adjustment is proposed. Two parameters can be tuned to obtain robustness with respect to variations in speed and magnitude of the reference signal: Adaptation gain, and derivative order of the adjustment rule. A model is developed for the vehicle, the design procedure is discussed, and simulation results are obtained to show the advantages the proposed fractional adaptation scheme.
Key Words: Fractional control adaptive control autonomous vehicles
Journal of Vibration and Control, Vol. 14, No. 9-10,
1499-1511 (2008) |
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