Abstract
Aiming at the error caused by spool dead zone and cylinder asymmetry in proportional valve-controlled asymmetric hydraulic cylinder control, a fuzzy sliding mode controller with variable dead zone compensation was designed, and the control accuracy and stability of this controller under no-load and negative load conditions were studied. The simulation results show that the sliding mode control method with variable dead-zone compensation can weaken the "flat top" phenomenon and lag caused by the dead-zone characteristics of the spool and the asymmetry of the cylinder. In no-load test, the maximum control error of general sliding mode control method with variable dead-zone compensation is ±5 mm, and that of fuzzy sliding mode control method with variable dead-zone compensation is ±2.5 mm. In the negative load test, due to adding the counterbalance valve, the shaking problem of the piston rod can be solved when it extends under the negative load of 20 kg.
Translated title of the contribution | A Fuzzy Sliding Mode Electro-Hydraulic Proportional Servo Control System Based on Variable Dead-Zone Compensation |
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Original language | Chinese (Traditional) |
Pages (from-to) | 971-978 |
Number of pages | 8 |
Journal | Beijing Ligong Daxue Xuebao/Transaction of Beijing Institute of Technology |
Volume | 43 |
Issue number | 9 |
DOIs | |
Publication status | Published - Sept 2023 |