TY - GEN
T1 - Study on Oil Pressure Characteristics and Trajectory Tracking Control in the Electro-hydraulic Servo System of a Torsional Isolator with Negative Stiffness Structures
AU - Li, Wenping
AU - Liu, Hui
AU - Wang, Xiaojie
AU - Gao, Tiantian
N1 - Publisher Copyright:
© Springer Nature Singapore Pte Ltd. 2018.
PY - 2018
Y1 - 2018
N2 - In this paper, a semi-active torsional isolator with negative stiffness structures is presented, which can be extensively applied in low frequency torsional vibration isolation due to its high static load bearing capacity and low dynamic stiffness. The model and working principle of this semi-active torsional vibration isolator have been presented first. From the working principle of the isolation system, controlling the position of the negative stiffness structure is an effective method to achieve better vibration isolation performance during the different working conditions of the system. Then the dynamic models of negative stiffness Structure and electro-hydraulic servo system are built. Considering the nonlinearity of the electro-hydraulic servo system, a trajectory tracking model of oil pressure in electro-hydraulic system based on dynamic models of torsional isolator with negative stiffness structures and hydraulic control system are built. The sliding mode variable structure control method is used to achieve the working conditions of the average torque changes. Finally, the tracking effect is analyzed by numerical simulation. The results showed that oil pressure could follow the optimal trajectory by the sliding mode variable structure control method well and stably, and the vibration isolation performance of the isolator could be improved.
AB - In this paper, a semi-active torsional isolator with negative stiffness structures is presented, which can be extensively applied in low frequency torsional vibration isolation due to its high static load bearing capacity and low dynamic stiffness. The model and working principle of this semi-active torsional vibration isolator have been presented first. From the working principle of the isolation system, controlling the position of the negative stiffness structure is an effective method to achieve better vibration isolation performance during the different working conditions of the system. Then the dynamic models of negative stiffness Structure and electro-hydraulic servo system are built. Considering the nonlinearity of the electro-hydraulic servo system, a trajectory tracking model of oil pressure in electro-hydraulic system based on dynamic models of torsional isolator with negative stiffness structures and hydraulic control system are built. The sliding mode variable structure control method is used to achieve the working conditions of the average torque changes. Finally, the tracking effect is analyzed by numerical simulation. The results showed that oil pressure could follow the optimal trajectory by the sliding mode variable structure control method well and stably, and the vibration isolation performance of the isolator could be improved.
KW - Hydraulic control system
KW - Negative stiffness structure
KW - Sliding mode variable structure control
KW - Torsional isolator
UR - https://www.scopus.com/pages/publications/85035791947
U2 - 10.1007/978-981-10-6553-8_49
DO - 10.1007/978-981-10-6553-8_49
M3 - Conference contribution
AN - SCOPUS:85035791947
SN - 9789811065521
T3 - Mechanisms and Machine Science
SP - 735
EP - 748
BT - Advances in Mechanical Design - Proceedings of the 2017 International Conference on Mechanical Design, ICMD 2017
A2 - Xiang, Changle
A2 - Tan, Jianrong
A2 - Gao, Feng
PB - Springer Netherlands
T2 - International Conference on Mechanical Design, ICMD 2017
Y2 - 13 October 2017 through 15 October 2017
ER -