Abstract:

For a hydraulic system with long pipelines of an underwater device, the system mathematical model with pipeline effect was established based on transmission pipeline dynamics. The pipeline impedance representation and its parameters were discussed. Referring to the mass-spring-damper model of pipeline, the original pipeline model was simplified by  applying frequency domain model reduction. The parameter calculation formulas of reduced model were obtained and the simulation analysis was done. It shows that the simplified model is very similar to the original one and convenient to  use in engineering applications.

Key words: long pipeline, underwater device, pipeline effect, model reduction

摘要：

针对一种具有长管路的水下作业机具液压系统，根据管路及其流体传输特点，基于流体传输管路动力学理论建立了考虑管路效应的液压系统数学模型，探讨了管路阻抗模型及其参数的选择。对照充液管路的质量-弹簧-阻尼模型,采用频域模型降阶方法对原管路模型进行了简化，给出了简化模型的参数计算公式并进行了仿真分析,结果表明,得到的简化模型对原模型有很高的近似度，比原模型更便于工程应用。

关键词: 长管路, 水下作业机具, 管路效应, 模型降阶