期刊
INTERNATIONAL JOURNAL OF CONTROL AUTOMATION AND SYSTEMS
卷 19, 期 1, 页码 301-310出版社
INST CONTROL ROBOTICS & SYSTEMS, KOREAN INST ELECTRICAL ENGINEERS
DOI: 10.1007/s12555-019-0648-6
关键词
Backstepping control; fault tolerant control; fractional-order control; robotic manipulator
资金
- National Natural Science Foundation of China [61973167,61773211,61973166]
- Key Research and Development Project of Jiangsu Province [BE2017161]
This paper investigates a finite time fault tolerant controller for robotic manipulators using fractional calculus theory and adaptive backstepping approach to achieve fast response and high-precision tracking. An adaptive form of the controller is established to handle overall uncertainties in the system, without requiring knowledge of actuator faults and external disturbances. The proposed controller ensures finite time convergence of the closed-loop system and attenuates the effects of actuator faults and uncertainties, as validated through simulation tests on a PUMA560 robot.
In this paper, fractional calculus theory is employed to inspect a finite time fault tolerant controller for robotic manipulators in the presence of uncertainties, unknown external load disturbances, and actuator faults, using fractional-order adaptive backstepping approach in order to achieve, fast response and high-precision tracking performance. Knowing the advantages of adaptive controllers an adaptive form of the above controller is then established to deal with the overall uncertainties in the system. The most important property of the proposed controller is that we do not need to have knowledge about the actuator fault, external disturbances and system uncertainties exist in system. In this study two important achievements are made. The first one is that the finite time convergence of closed-loop system is ensured irrespective of initial states values. The second one is that the effects of the actuator faults and other uncertainties are attenuated by the suggested controller. The performance of the suggested controller is then tested for a PUMA560 robot in which the first three joints are used. The simulation results validate the usefulness of the suggested finite-time fractional-order adaptive backstepping fault-tolerant (FOAB-FTC) controller in terms of accuracy of tracking, and convergent speed.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据