Study on the Coupling Oscillations between the Hydraulic Power System and the Servo-system in HAGC System
For HAGC systen. designing, it is a general way to design the hydraulic power system and the servo system independently. The pressure and the flow rate of the hydraulic power system must meet the load power, maximum velocity, and output force of the servo system. The constant supply pressure is also an important boundary condition for the servo system designing. In practice, this static designing method can be accepted for the low natural frequency and low accuracy system. But the pressure of the supply in practical system is fluctuant, and there is a long transmission line net (included the accumulator and oil filter etc.) between the pump station and the mill in HAGC system. The experiments indicate that the length of pipe should be less than 1/10 of the wavelength (about 10m) in the system with 10 Hz natural frequency, and thus the transmission lines can be characterized by the model of lumped parameter. The hydraulic oil in the transmission line can be treat as a control volume, and the influence on the system is light. When the length of the pipe is longer than 10m or the working frequency of system is high, a distributed parameter model of transmission line should be adopted. Thus the influence of the transmission lines on the system can not be neglected, and the coupling between the power hydraulic system and the servo system will also affect HAGC system response. How to evaluate tile coupling effect between the power hydraulic system and the servo system, and how to analyze the influence of the transmission lines on the response and stability of HAGC system is an important problem.
Hydraulic Power System Coupling Oscillations transmission lines Hydraulic Automatic Gauge Control System(HAGC)
Liu Jinjun Wang Yiqun
Academy of Mechanical Engineering, Yanshan University, Qinhuangdao, Hebei, 066004, China
国际会议
北戴河
英文
561-565
2007-06-06（万方平台首次上网日期，不代表论文的发表时间）