Pressure characteristics of a pneumatic servovalve with uneven underlaps of the spool 具有不均等正開(kāi)口量的雙邊滑閥式氣動(dòng)伺服閥特性研究
The mathematical model is also built and system nonlinear effects are analyzed , especially nonlinear effects of electro - hydraulic servovalve , pump station , and pipes 分析研究了系統(tǒng)非線性的影響,特別是電液伺服閥的非線性、油源、管道等因素的影響,建立了系統(tǒng)的數(shù)學(xué)模型。
Electrohydraulic servovalve is a kind of important competent in the electrohydraulic servo control system , its condition decides the performance of the whole system 電液伺服閥是結(jié)合了機(jī)械、電子和液壓技術(shù)的高度精密部件,它的性能直接影響甚至決定整個(gè)電液伺服系統(tǒng)系統(tǒng)的性能。
Research status and performance of pneumatic ratio servovalve are deeply analyzed . they provide theoretical base for high accuracy orientation control of servo control system and pointers for improving system performance . additionally 對(duì)氣動(dòng)比例伺服閥的特性與研究狀況進(jìn)行了較為深入的研究,為伺服控制系統(tǒng)的高精度的定位控制提供了理論基礎(chǔ),改善系統(tǒng)性能提供了指針。
With an overall analysis of the marketing environment , interior resource , marketing segmenting , marketing positioning of the largest company in china handling electrohydraulic servovalve as well as characteristics of its products , the paper points out its weaknesses in the marketing area with the aid of the marketing theory and gives some systematic suggestions as to the marketing mix such as product , price , place , promotion , power and public relation , based on discrepancy competitive strategy , 6ps theory and practice of the company 本文以我國(guó)最大的電液伺服閥生產(chǎn)企業(yè)中航609所液壓公司為背景,結(jié)合電液伺服閥產(chǎn)品的特點(diǎn),運(yùn)用市場(chǎng)營(yíng)銷(xiāo)理論,從營(yíng)銷(xiāo)觀念的建立入手,通過(guò)對(duì)公司的營(yíng)銷(xiāo)環(huán)境、內(nèi)部資源、市場(chǎng)細(xì)分及市場(chǎng)定位的全面分析,指出了公司在市場(chǎng)營(yíng)銷(xiāo)領(lǐng)域的薄弱環(huán)節(jié);并且以差異化競(jìng)爭(zhēng)策略為指導(dǎo),以6ps理論為基礎(chǔ),針對(duì)公司的具體情況,對(duì)其各細(xì)分市場(chǎng)的產(chǎn)品、價(jià)格、分銷(xiāo)、促銷(xiāo)、權(quán)力和公共關(guān)系等營(yíng)銷(xiāo)組合策略提出了系統(tǒng)的建議。
Therefore , to test servovalve become an important work for improving control system ' s characteristic in chapter one , the work ' s origin and computer ' s applications in the hydraulic test ' s fields are showed , and the same product ' s position at present is briefly introduced . in chapter two , the basic characteristics of the eledtrohydraulic servovalve and the basic test methods are introduced 伺服閥的檢測(cè)對(duì)于保證伺服閥的性能指標(biāo)、保證電液伺服系統(tǒng)準(zhǔn)確快速穩(wěn)定的工作有重要的意義論文主要闡述了以工控機(jī)、數(shù)據(jù)采集卡、信號(hào)發(fā)生器等硬件為基礎(chǔ),運(yùn)用虛擬儀器的思想,開(kāi)發(fā)電液伺服閥計(jì)算機(jī)輔助測(cè)試系統(tǒng)的過(guò)程、收獲和最后取得的成果。