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利用液体作为动力和控制手段是一项比较新的技术,由于它具有许多独特的优点,所以在机床工业、工程机械、重型机械、交通运输和军事工业部门得到广泛的应用。自第二次世界大战以来,在资本主义世界各国,由于军事工业的需求,自动控制系统,特别是武器和航行器控制系统的研制工作,得到了很大的发展。加之液压系统具有体积小、重量轻、操纵方便、易于实现自动控制等优点,所以在过去二十年中,液压技术得
The use of liquids as a motivation and control technique is a relatively new technology and is widely used in the machine tool industry, construction machinery, heavy machinery, transportation and military industries due to its unique advantages. Since the Second World War, in all countries in the capitalist world, due to the needs of the military industry, the development of automatic control systems, especially the control systems of weapons and aircraft, has been greatly developed. Coupled with the hydraulic system has a small size, light weight, easy to operate, easy to implement automatic control, etc., so in the past two decades, hydraulic technology