TY - GEN
T1 - An energy-saving position control strategy for electro-hydraulic servo system with parallel dual valves
AU - Niu, Shanshuai
AU - Wang, Junzheng
AU - Zhang, Peng
AU - Zhao, Jiangbo
AU - Wang, Shoukun
AU - Shen, Wei
N1 - Publisher Copyright:
© 2019 Technical Committee on Control Theory, Chinese Association of Automation.
PY - 2019/7
Y1 - 2019/7
N2 - Proportional directional control valves (PDCVs) with large flow and high control accuracy in electro-hydraulic servo systems(EHSS) are usually expensive, at the same time, the demand for energy-saving in EHSS is increasing rapidly. In order to solve the cost and achieve energy-saving, an energy-saving position control strategy for EHSS with parallel dual valves is designed. First, the mathematical model of the system is established. Secondly, to obtain a high position tracking performance, the basic controller of the system was designed by back-stepping control method to solve the virtual control law. Then, a control distributor was designed to obtain the smooth switching strategy between different modes. Next, the main approach to energy-saving was to decrease the supply pressure and supply flow as much as possible. A nonlinear set of laws are derived to vary the supply pressure according to the required forces during position tracking, while a servo motor controller was designed for the fixed displacement pump to vary supply flow according to the required flow. Experiment results show that, the cheap parallel dual-parallel PDCVs with common performance can achieve high position tracking performance of EHSS to replace an expensive high performance PDCV, and the effect of energy-saving is obvious.
AB - Proportional directional control valves (PDCVs) with large flow and high control accuracy in electro-hydraulic servo systems(EHSS) are usually expensive, at the same time, the demand for energy-saving in EHSS is increasing rapidly. In order to solve the cost and achieve energy-saving, an energy-saving position control strategy for EHSS with parallel dual valves is designed. First, the mathematical model of the system is established. Secondly, to obtain a high position tracking performance, the basic controller of the system was designed by back-stepping control method to solve the virtual control law. Then, a control distributor was designed to obtain the smooth switching strategy between different modes. Next, the main approach to energy-saving was to decrease the supply pressure and supply flow as much as possible. A nonlinear set of laws are derived to vary the supply pressure according to the required forces during position tracking, while a servo motor controller was designed for the fixed displacement pump to vary supply flow according to the required flow. Experiment results show that, the cheap parallel dual-parallel PDCVs with common performance can achieve high position tracking performance of EHSS to replace an expensive high performance PDCV, and the effect of energy-saving is obvious.
KW - Back-stepping
KW - Electro-hydraulic Servo Systems(EHSS)
KW - Energy Saving
KW - Parallel Dual Valves
UR - http://www.scopus.com/inward/record.url?scp=85074394970&partnerID=8YFLogxK
U2 - 10.23919/ChiCC.2019.8866140
DO - 10.23919/ChiCC.2019.8866140
M3 - Conference contribution
AN - SCOPUS:85074394970
T3 - Chinese Control Conference, CCC
SP - 3266
EP - 3271
BT - Proceedings of the 38th Chinese Control Conference, CCC 2019
A2 - Fu, Minyue
A2 - Sun, Jian
PB - IEEE Computer Society
T2 - 38th Chinese Control Conference, CCC 2019
Y2 - 27 July 2019 through 30 July 2019
ER -