Abstract: To avoid the flow asymmetry of a closed circuit pump-controlled asymmetric cylinder system, an efficient open circuit pump-controlled asymmetric cylinder system (OPACS) with an independent displacement volume-in and volume-out (VIVO) control method is proposed. The energy transmission path of the OPACS was analyzed, and an energy calculation model was built. A position-pressure combined control method was adopted to validate the proposed OPACS. Based on a 0.6-MN open circuit pump-controlled forging press system, a series of experiments with different return cylinder pressures were conducted. The experimental results confirmed that the proposed OPACS with the position-pressure combined control method was able to recover energy to reduce the installment power without sensitivity to the return cylinder’s pressure variation and that the position accuracy and rapidity could be improved by increasing the pressure in the return cylinder.

开式泵控非对称缸负载容腔独立控制系统

[1]Busquets E, Ivantysynova M, 2015a. A multi-actuator displacement-controlled system with pump switching: a study of the architecture and actuator-level control. Transactions of the Japanese Fluid Power System Society, 8(2):66-75.

[2]Busquets E, Ivantysynova M, 2015b. Adaptive robust motion control of an excavator hydraulic hybrid swing drive. SAE International Journal of Commercial Vehicles, 8(2):568-582.

[3]Chiang MH, 2011. A novel pitch control system for a wind turbine driven by a variable-speed pump-controlled hydraulic servo system. Mechatronics, 21(4):753-761.

[4]Cho SH, Helduser S, 2008. Robust motion control of a clamp-cylinder for energy-saving injection moulding machines. Journal of Mechanical Science and Technology, 22(12):2445-2453.

[5]Ge L, Dong Z, Huang W, et al., 2015. Research on the performance of hydraulic excavator with pump and valve combined separate meter in and meter out circuits. IEEE International Conference on Fluid Power and Mechatronics, p.37-41.

[6]Habibi S, Goldenberg A, 2000. Design of a new high-performance electro hydraulic actuator. IEEE/ASME Transactions on Mechatronics, 5(2):158-164.

[7]Hippalgaonkar R, Ivantysynova M, 2016a. Optimal power management for DC hydraulic hybrid multi-actuator machines—Part 1: Theoretical studies, modeling and simulation. Journal of Dynamic Systems, Measurement, and Control, 138(5):051002.

[8]Hippalgaonkar R, Ivantysynova M, 2016b. Optimal power management for DC hydraulic hybrid multi-actuator machines—Part 2: Machine implementation and measurement. Journal of Dynamic Systems, Measurement, and Control, 138(5):051003.

[9]Imamura T, Sawada Y, Ichikawa M, 2008. Energy-saving hybrid hydraulic system comprising highly efficient IPM motor and inverter, for injection molding and manufacturing machine. Proceedings of the JFPS International Symposium on Fluid Power, p.117-120.

[10]Liu Y, Söffker D, 2007. Robust approach for position control of hydraulic differential cylinder. Proceedings of the ASME International Design Engineering Technical Conferences & Computers and Information in Engineering Conference, p.27-32.

[11]Peng Y, Wang J, Wei W, 2014. Model predictive control of servo motor driven constant pump hydraulic system in injection molding process based on neurodynamic optimization. Journal of Zhejiang University-SCIENCE C (Computers & Electronics), 15(2):139-146.

[12]Quan L, 2008. Current state, problems and the innovative solution of electro-hydraulic technology of pump controlled cylinder. Chinese Journal of Mechanical Engineering, 44(11):87-92 (in Chinese).

[13]Quan L, Lian ZS, 2005. Improving the efficiency of pump controlled differential cylinder system with inlet and outlet separately controlled principle. Chinese Journal of Mechanical Engineering, 41(3):123-127 (in Chinese).

[14]Rose J, Ivantysynova M, 2011. A study of pump control systems for smart pumps. Proceedings of the 52nd National Conference on Fluid Power, p.683-692.

[15]Sanada K, Miyazaki T, 2016. Application of DDVC fuel injection system to ship speed control. BATH/ASME Symposium on Fluid Power and Motion Control, No. FPMC2016-1760.

[16]Sha N, Li J, 2004. Research on airborne power-by-wire integrated electrical actuation and control system. Journal of Beijing University of Aeronautics and Astronautics, 30(9):909-912 (in Chinese).

[17]Su WH, Jiang JH, 2010. Direct drive volume control electro-hydraulic servo ship rudder. Key Engineering Materials, 439-440:1388-1392.

[18]Wang X, Tao JF, Zhang FR, 2016. Precision position control of pump-controlled asymmetric cylinder. Journal of Zhejiang University (Engineering Science), 50(4):597-602 (in Chinese).

[19]Zhao H, Zhang HJ, Quan L, 2013. Characteristics of asymmetrical pump controlled differential cylinder speed servo system. Journal of Mechanical Engineering, 49(22):170-176 (in Chinese).

[20]Zheng JM, Zhao SD, Wei SG, 2010. Fuzzy iterative learning control of electro-hydraulic servo system for SRM direct-drive volume control hydraulic press. Journal of Central South University of Technology, 17(2):316-322.

[21]Zimmerman J, Ivantysynova M, 2010. Reduction of engine and cooling power by displacement control. Proceedings of the 6th FPNI PhD Symposium, p.339-352.