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液压伺服系统设计指南VALVE SIZING AND PERFORMANCE ESTIMATION

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1#
发表于 2018-3-23 09:54:25 | 只看该作者 回帖奖励 | 倒序浏览 | 阅读模式
1.0 OVERVIEW
1.1 Valve Sizing and Performance issues
1.2 Spreadsheet Applicability
1.3 Conventions
1.4 Spreadsheet
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2.0 USING THE SPREADSHEET
2.1 Data Entry
2.2 Spreadsheet Section 1 – ‘Cylinder and Pressure Supply Details’
2.3 Spreadsheet Section2 – ‘Valve Details’
2.4 Spreadsheet Section 4 – ‘Cylinder Drive Sizing Results’
2.5 Spreadsheet Section 3 – ‘Load and Pipe Details’
2.6 Spreadsheet Section 5 – ‘ Cylinder Drive Position Control Results’
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3.0 SUMMARY OF SERVO DESIGN GOOD PRACTICE

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4.0 SPREADSHEET APPLICATION EXAMPLE
4.1 Application (Spreadsheet Default) Details
4.2 Selecting Supply Pressure and Actuator Size
4.3 Valve Sizing
4.4 Mass and Pipeline Considerations
4.5 Closed Loop Position Performance

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5.0 SIZING AND PERFORMANCE ESTIMATION BY MANUAL CALCUALTION
5.1 Component Sizing
5.2 Rules of Thumb for Position Control Performance
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6.0 OTHER OPERATING CONFIGURATIONS
6.1 Cylinder Effective Mass Calculations
6.2 Three Port Operation
6.3 Pressure Control Applications
6.4 Digital Controller Calculations
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Valve sizing and performance estimation for electrohydraulic servo systems is a necessary
step if the required performance is to be assured. On some occasions the valve itself
provides a natural limit to performance, either in terms of maximum flow rates and therefore
actuator velocities, or else in terms of the dynamic performance (as described by the valve
frequency response). In the later case the valve performance limits the control gain and so
also the closed loop dynamic behaviour and static accuracy.

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In other situations the characteristics of
the actuator and load being driven
provide a limit to the closed loop
performance which will not be improved
even with the fastest, highest flowing or
most accurate of servo valves.
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Separating these things out and
optimising performance but without over
specifying the valve is not always
obvious, and generally requires a number
of calculations to be undertaken. In this
Application Note a spreadsheet is used
for this purpose. A minimal amount of
data entry is required from which the
maximum drive capabilities and closed
loop static and dynamic performance is
estimated.
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2#
发表于 2018-3-23 13:29:49 | 只看该作者
很深奥的赶脚!
3#
发表于 2018-3-23 14:40:51 | 只看该作者
这么专业的资料,我看看!
4#
发表于 2018-3-23 14:42:11 | 只看该作者
嗯,是MOOG的一个技术文档,讲 电液伺服控制 设计问题
5#
发表于 2018-3-24 17:38:43 | 只看该作者
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这么专业的资料,我看看
6#
楼主 | 发表于 2018-8-16 21:32:32 | 只看该作者
7#
发表于 2018-8-17 10:57:51 | 只看该作者
moog的东西在伺服领域还是很牛啊,资料也很好,留下来慢慢研读。
8#
楼主 | 发表于 2018-8-26 18:10:38 | 只看该作者
就是太贵,伺服阀G761都快一万八,伺服液压系统造价比较高,还得配伺服运动控制器,伺服油缸,磁致位移传感器。
9#
发表于 2018-9-6 09:42:59 | 只看该作者
一分价钱一分货啊,贵有他贵的道理
10#
发表于 2018-10-31 10:41:58 | 只看该作者
伺服还用不上,可以看看学习一下
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