Transactions of Materials and Heat Treatment

Title：Intelligence synchronous control on sliding mode variable structure for multicylinder hydraulic press

Authors：

Unit：

KeyWords： multi-cylinder hydraulic press sliding mode variable structure intelligence synchronous control sliding mode layer improved adjacent cross-coupling controller

ClassificationCode：TP23

year,vol(issue):pagenumber：2021,46(6):142-149

Abstract：

To reduce the synchronous control error and tracking error of multi-cylinder hydraulic press, the improved adjacent cross-coupling controller based on the saturation function control law was designed, and the dynamic model of synchronious system for a four-cylinder hydraulic press was built by setting valve-control voltage as control quantity. Then, the adjacent cross-coupling controller was improved to reduce the number of controller input and the complexity of control law, and the concept of sliding mode layer based on saturation function was put forward to decrease the chattering amplitude of sliding mode control, which reduced the switching inertia when the system state in the sliding mode layer was close to the sliding mode surface, thereby reducing the chattering problem. The simulation and experimental verification show that the chattering amplitude of the saturation function control law is far less than that of the sign function control law. In the case of simulated eccentric load, the maximum stable synchronous error is 0.03 mm, and in the case of experimental eccentric load, the maximum stable synchronous error is 0.0413 mm. Thus, the improved adjacent cross-coupling controller based on the saturation function control law realizes high-precision synchronous control.

Funds：

山东省高等学校“青创科技计划”资助项目(2019KJN015)；山东省职业教育技艺技能传承创新平台资助项目

陶翠霞（1979-），女，硕士，副教授 E-mail：yang5551314@126.com

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