功率键合图, 深海热液, 流控系统, 动态性能

A kind of fluid control system was designed using pressure compensation method for in-situ pH exploration of deep-sea hydrothermal fluid. In order to disclose dynamic characteristics of the fluid control system adopted pressure compensation method, power bond graphs were drawn by means of bond graph theory, and on this basis, mathematic models of the fluid control system were built, thus, the foundation for simulation was laid. The fluid control system was simulated by MATLAB/Simulink,and the simulation results show that dynamic process of the fluid control system is generally smooth when sucking in atmospheric pressure; pressure occurs sudden change when sucking in high pressure; pressure occurs slight fluctuation when draining in atmospheric pressure and high pressure. All of these explains that the system will occur sudden pressure changes and vibrations in high pressure environment in despite of the fluid control system can apply in deep-sea high pressure environment by means of pressure compensation method. Therefore,the solutions of avoiding open and close frequently in high pressure environment were put forward. The sea trial experiments indicate the fluid control system can work normally in high pressure environment on the seafloor. 

power bond graph, deep-sea hydrothermal fluid, fluid control system, dynamic characteristics