液压控制技术发展趋势──第2部分　液压油路的仿真和环境影响

Development Trends in Fluid Power Part1 2:Simulation of Hydraulic Circuits and their Environmental Impact

液压控制技术的发展，决定性地受到其周边领域一些技术发展的影响，如新近由微电子技术（包括必须的软件）与微机械技术结合所形成的所谓“机电一体化（Ｍｅｃｈａｔｒｏｎｉｋ）”技术，以及材料技术。作者论述了这些技术对液压元件和系统的影响。控制液压传动装置的部件，主要是若干直控式阀和变量单元。本文论述了这些器件的发展趋势，因为效率优化的传动装置，对今后的应用也是很重要的。在液压元件与系统的发展中，可以应用液压控制技术和计算机辅助设计技术。作为例子，本文介绍了发展现代液压元件与系统的仿真程序ＤＳＨ＋。本文的第２部分将研究液压技术对环境的影响。与此有关的主要有噪声、泄漏和作为工作介质的油液。此外，通过若干例子介绍了日益扩大应用的有限元法（ＦＥＭＰｒｏｇｒａｍｍｅｓ），以便使大家明了这一工具的意义在不断地提高。

Abstract Part 1:The boundaries of fluid power are strongly influenced by other technologies such as microelectronics (including software), micromechanics (mechatronics) and material science. The author discusses their influence on components and hydraulic circuits. Components of hydraulic drive controls are chiefly comprised of direct control valves and adjustable displacement units. Trends in their development are noteworthy since optimumefficiency hydraulic drives will remain important in the future. In developing components and connections engineers may use compouter aided design tools such as the simulation programme DSHplus. Part 2:A description of the environmental impact of fluid power as evidenced mainly through noise, leakage and fluids as pressure media adds to the discussion of trends in fluid power. Finally the use of FE programmes is demonstrated by means of several examples to illustrate their growing importance.