电液定位执行器结构解性质的定量评价

Qiang Li, O. Uzunov
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引用次数: 0

摘要

在分析已知电液定位执行器的基础上,给出了其广义方案,包括:控制单元、到达给定位置的指令形成单元、执行机构、位置传感器和液压能量供应单元。确定了两种执行器的主要区别在于指令形成单元,其结构解决方案基于四种控制方法:模拟控制流体供应以达到预设位置;离散控制流体供应到达预设位置的时间;对流体供应进行离散控制以达到预设的固定位置;对分配的流体供应进行离散控制以达到预设位置。针对执行机构的各种结构方案,分析了主要参数对其实现基本性能的有效性的影响。提出了一种定量评估方法,使揭示致动器结构与性能之间的关系成为可能。所获得的结果可用于开发新的有效位置致动器。
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Quantitative evaluation of properties of structural solutions of electrohydraulic positioning actuators
Based on the analysis of known electro-hydraulic positioning actuators, its generalized scheme was given, which includes: control unit, command formation unit for reaching given position, executive mechanism, position sensor, and hydraulic energy supply unit. It was determined that the main difference between the actuators lies in the command formation unit, the structural solutions of which are based on four control methods: analog control of fluid supply to reach preset position; discrete control the time of fluid supply to reach preset position; discrete control of fluid supply to reach preset fixed position; discrete control of portioned fluid supply to reach preset position. For various structural solutions of actuators, the influence of the main parameters on their effectiveness in achieving the basic properties was analysed. A quantitative evaluation was proposed, which made it possible to reveal the relationship between the structure and properties of the actuators. The obtained results can be used to develop new effective positional actuators.
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