A Method for Tuning the Frequency Series Wave Speed in Hydraulic Flexible Hose

摘要

The hydraulic system has a pump that converts the mechanical energy to the hydraulic one. This pump is a source of system's noise which is generated from flow pulsation and pressure's violent fluctuation in cylinder chambers. This noise is propagated with tube and structural object. A wave speed can be used to calculate the flow pulsation and pressure one in the transfer matrix method which is express the tube's mathematical model. So it is important to know about a wave speed in the hose for reduce the system's noise. But a wave speed is not constant in flexible hose. This study is a method to find a transfer function of wave speed in the flexible tube's wall model. This wall model already had been suggested. And 3 parameters of this wall model also had been tuned by trial and error method in the former studies. But it is so difficult to apply this method to the 5 parameters model because searching ranges of wall model variable are too large. A RCGA (real coded genetic algorithm) can be answer to solve this problem in this study.