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- Title
隔膜分切机放卷张力串级控制器设计.
- Authors
汪良; 王恒升; 郭新平; 廖正银
- Abstract
Aiming at the control of unwinding tension in slitting machine for diaphragm used in lithium batteries, a cascade control method based on disturbance compensation is proposed to accommodate the challenge due to the system nonlinearity, strong coupling and time-variant characteristics in the unwinding section of the slitting machine. Via the idea of hierarchical control, two coupled variables of unwinding tension and unwinding velocity were put in cascade manner in the control schema, which enhanced the disturbance compensation and robust control of the speed-loop in the unwinding section and improved the stability of the control system. Considering time lag nature of tension behind speed, the outer tension-loop was designed with integral sliding mode control to obtain the optimal value of the speed expectation of the unwinding roll, while the inner speed-loop was designed with robust backstepping sliding mode control to achieve unwinding speed tracking. An extended state observer was designed to compensate the disturbances and unmodel dynamics of the system. Simulation and experiments show that the proposed cascade controller has good performance in robustness and anti-disturbance compared with PID control, which is applicable to different working conditions of the diaphragm slitting machine.
- Subjects
SLIDING mode control; BACKSTEPPING control method; CASCADE control; SPEED; INTEGRALS
- Publication
Electric Machines & Control / Dianji Yu Kongzhi Xuebao, 2023, Vol 27, Issue 10, p181
- ISSN
1007-449X
- Publication type
Article
- DOI
10.15938/j.emc.2023.10.018