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In a laser-tracing measurement system, the tracking control performance largely determines the measurement accuracy. However, the continuous forward and reverse movements of the system required for the tracking process, frictional torque, and external disturbances affect the tracking performance. In addition, when a two-dimensional position-sensitive detector extracts the target information, the required quantity of light intensity accumulation and circuit processing time lead to a time delay in obtaining the position deviation. In this study, we propose a tracking control method based on compound fuzzy control (CFC) and friction torque compensation (FTC) to enhance the control performance. To compensate for the position lag and frictional torque in the system and to enhance the tracking and anti-interference performance, a compound fuzzy control method based on position feedforward control and dual-mode control was employed. In this study, a field-oriented control strategy was used to achieve tracking control in a laser-tracking control system. In this method, the speed loop adopted a variable-universe fuzzy proportional–integral (VUFPI) control strategy with friction torque compensation, whereas the position loop employed a compound fuzzy control strategy. The simulation and experimental results demonstrate that the improved CFC–(VUFPI+FTC) cascade control method offers better tracking performance than the traditional proportional–integral cascade control method. The rotational-axis tracking speed of the laser-tracking control system improved by 84.6%, while the pitch axis tracking speed increased by 93%. © 2024 Elsevier Ltd
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Mechanical Systems and Signal Processing
ISSN: 0888-3270
Year: 2025
Volume: 224
8 . 4 0 0
JCR@2022
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ESI Highly Cited Papers on the List: 0 Unfold All
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30 Days PV: 4
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