【正文】 界面管理模塊主要負(fù)責(zé)靜動(dòng)態(tài)特性曲線的繪制，由個(gè)特性曲線子模塊調(diào)用 Plot( )函數(shù)完成，輔助功能模塊包括測(cè)試數(shù)據(jù)的格式化輸出到文件，以及測(cè)試文檔和數(shù)據(jù)的打印。 18 被試閥電流信號(hào)壓力信號(hào)11115流量信號(hào)16泄露流量信號(hào)5被試閥正弦電流信號(hào)i速度傳感器20信號(hào)輸入通道及調(diào)理數(shù)據(jù)采集卡測(cè)試計(jì)算機(jī)數(shù)字信號(hào)發(fā)生器被試伺服閥放大器壓力設(shè)定動(dòng)靜態(tài)特性曲線繪制測(cè)試結(jié)果文檔及數(shù)據(jù)保存信號(hào)輸出通道（A/D)圖二 測(cè) 試系統(tǒng)電路結(jié)構(gòu) 軟件系統(tǒng)的主要功能是完成測(cè)數(shù)據(jù)的處理和測(cè)試曲線的繪制，因此從功能上劃分，可分為信號(hào)處理模塊、數(shù)據(jù)通訊模塊、界面管理模塊和負(fù)責(zé)測(cè)試文檔處理及數(shù)據(jù)保存的輔助功能模塊。 測(cè)試系統(tǒng)在靜態(tài)特性試驗(yàn)時(shí)需要采集的信號(hào)包括：被試伺服閥線圈的電流信號(hào)、進(jìn)油口 P 的壓力、負(fù)載 A 口和 B 口的壓力信號(hào)、泄漏口 O 的壓力信號(hào)、負(fù)載 A 口和 B 口之間的流量信號(hào)、泄漏口 O 的流量信號(hào)；動(dòng)態(tài)特性測(cè)試時(shí)需要采集的信號(hào)有：被試閥線圈的電流信號(hào)，速度傳感器 20 輸出的電壓信號(hào)。 泄露特性測(cè)試方法 測(cè)試泄露特性時(shí)先將開關(guān)閥 1 1 9 關(guān)閉，將閥 7 打開，然后調(diào)節(jié)溢流閥 3 使系統(tǒng)壓力達(dá)到被試閥的額定壓力，然后向被試閥線圈通入激勵(lì)電流，用流量傳感器 5 測(cè)試泄流流量的大小，并將泄露信號(hào)和給定的激勵(lì)電信號(hào)經(jīng)采樣輸送到計(jì)算機(jī)，由測(cè)試系統(tǒng)繪出泄露特性曲線 qr=f(177。q=f(177。由渦輪流量計(jì) 16 檢測(cè)電流變化過(guò)程中的流量，并將測(cè)得的流量值和輸入的相應(yīng)電流值送到計(jì)算機(jī)中去 ，由計(jì)算機(jī)可以畫出流量電流變化的，即為被試閥的空載流量特性曲線 177。一種設(shè)計(jì)外接引線的端子板；一種配置了全套控制電器。用戶購(gòu)后只要將液壓站與主機(jī)上的執(zhí)行機(jī)構(gòu)（油缸或馬達(dá)）用油管連接，液壓機(jī)械即可實(shí)現(xiàn)各種規(guī)定的動(dòng)作和工作循環(huán)。177。 q = f (177。 dynamic characteristics are mainly the test on frequency characteristics of servo valve. The above testing results of characteristics need to be drawn out in the way of graph. Figure 1 is a schematic diagram of hydraulic test system. 4 34568111219 2021 er colat or raulic pum p rf lowvalve nergy accum ulator 5 16 .tu rbineflo wmeter 69 17 off valve tatictes ting po s iti on of valve amic tes tingpo s iti on of valve 12 ss uretrans ducer1 mic cy linder 20 .ve locit ytrans ducer2 lacementtranc ducer2 ortion al ove rf low valve23 .check valve un it271615 141723 22189 13A BPA BP10O s ta ti c a nd dy na m ic tes tin g s ys tem of elect ro hy dra ul ic servo valve1O According to the testing tems ,we install the valve to be tested on the static and dynamic testing board we execute a static test, we should close the switching valve 8, and open the valve 6 .On the contrary, turn on valve 8 , and turn down valve 6 when we do a dynamic test. Testing method of characteristics of unloaded flow 5 Operations are as follows,when we test the characteristics of unloaded ,close switch valve 18 and 7, and open valve 17 and should make sure the pressure difference between the two output ports A and B of the electrohydraulic servo valve △ PL=0. And then input trianglewave current signal with the frequency of into the valve being tested. The size of the current signal vary in accordance with the following rule: changes from 0 to +imax, then from +imax to 0, then to +imax , and back to flow meter 16 detects the flow in the process of the varying current and input the puter with the measured flow and corresponding puter can draw the curve of the flow varing with the current,namely the curve of the unloaded flow characteristics 177。.We should use 10 sinusoidal signals of different frequiencies for exciting signals of the valve coil to be tested ,then measure the output flow signal in turn and filter out the signals different with the exciting signal of the flow signal and serve it as the response signals of the servo valve to be tested . The two signals are entered into the puter by turns after sampling , and epuate the autospectral spectrum of the exciting signals GXX(f) and crosspower spectrum of exciting signals and responding signals GXY(f) . By this method we can get the frequency response H (f) = GXX (f) / GXY (f) . When we do the test of the dynamic characteristics , close switch valve 6 and open valve 8 . An independent signal generator produces scaning sinusoidal signal . The signal is entered into the servo amplifier after amplification and drive the dynamic cylinder to move . With the help of the speed sensor installed on the dynamic cylinder ,we can equate the output flow of the servo valve being tested . 8 And the shift sensor installed on the other side can be used for preventing the dynamic cylinder from deviating from the central position . 4. Current circuit of the test system The signals need to be collected during the static characteristics test of the testing system signals include Current signals of the servo valve coil to be tested, Pressure of inlet oil port , Pressure signal of load port A and B , Pressure signal of leaking mouth , Flow signal of load port A and B , Flow signal of leaking mouth . The signals need to be coll