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10210AEV2 REV. A <br />SECTION 3 <br />3.0 LABORATORY TEST APPARATUS <br />3.1 VEHICLE SUPPORT FIXTURE <br />General Testing Laboratories' vehicle support fixture consists of a bolted <br />10-inch "H" beam frame with gusseted vertical members to support the <br />hydraulic load application cylinders. <br />3.2 LOAD APPLICATION SYSTEM <br />Load application is achieved with servo controlled hydraulic cylinders. The <br />cylinders are attached to the load/vehicle support frame on one end and <br />the other (rod) end has a load cell mounted on it. A cable runs from the <br />load cells to the body blocks or seat frames. <br />3.3 HYDRAULIC SYSTEM MONITORING/CONTROL SYSTEMS <br />The load cell output is monitored by a computer and the computer feeds a <br />signal to the servo valve thus achieving closed loop control. The computer <br />is programmed with the appropriate load versus time ramp for a given test. <br />Data from each load cell is collected by the computer and stored for <br />plotting. <br />3.4 TEST EQUIPMENT LIST <br />ITEM <br />Computer <br />Test Fixture <br />A/D Interface <br />Signal <br />Conditioner <br />Load Cell <br />Load Cell <br />Load Cell <br />Load Cell <br />Load Cell <br />Load Cell <br />Load Cell <br />MANUFACTURER <br />AT&T <br />GTL <br />METRABYTE <br />I►y, I=1I 711 yli 10 <br />REVERE <br />REVERE <br />REVERE <br />REVERE <br />REVERE <br />INTERFACE <br />INTERFACE <br />MODEL RANGE ACCURACY <br />486DX266 N/A <br />N/A N/A <br />DAS-16(F) N/A <br />USP2 <br />USP2 <br />USP2 <br />USP2 <br />USP1 <br />U3SB <br />U3SB <br />10KLB <br />10KLB <br />10KLB <br />10KLB <br />10KLB <br />2KLB <br />2KLB <br />N/A <br />N/A <br />0.01 % of <br />reading, <br />1 BIT <br />Better <br />than 0.1 % <br />.1% <br />.1% <br />.1% <br />.1% <br />.1% <br />.1% <br />.1% <br />LAST <br />CALIBRATION <br />DATE <br />N/A <br />N/A <br />Before use <br />Before use <br />02/10 <br />02/10 <br />02/10 <br />02/10 <br />02/10 <br />02/10 <br />02/10 <br />4 <br />