1、GM DAEWOO Auto & Technology EDS Engineering, GM DAEWOO Auto & Technology Standards FRONT STRUT ASSEMBLY VERTICAL LOADING DURABILITY EDS-T-2539 ISSUED DATE: 2005. 09. 07 REVISED DATE: - VERSION: 1 EDS-T-2539FRONT STRUT ASSEMBLY VERTICAL LOADING DURABILITY PAGE: 1/4 ISSUED DATE: 2005. 09. 07 REVISED D
2、ATE: . . VERSION: 1 GM DAEWOO Auto & Technology 1. PURPOSE AND SCOPE This standard is applied for the purpose of examining a strut assembly for development by way of performing a lab durability test on the strut assembly using road load data at the stage of development. 2. TEST ITEMS 2.1. Objects to
3、 be tested To approve durability through vertical loading - Strut mount assembly - Spring - Hollow bumper 2.2. Preparations for Test Strut Assembly (Damper, Spring, Upper Spring Seat, Spring, Upper Insulating Ring, Upper Strut Mount, Thrust Bearing, Lower Insulating Ring, Hollow Bumper etc.) Fig 1.
4、Strut System Test Rig 3. TEST EQUIPMENTS 3.1. Jig Part It shall be designed to reproduce the on-road condition by applying on-road vertical displacement which is EDS-T-2539FRONT STRUT ASSEMBLY VERTICAL LOADING DURABILITY PAGE: 2/4 ISSUED DATE: 2005. 09. 07 REVISED DATE: . . VERSION: 1 GM DAEWOO Auto
5、 & Technology measured under comprehensive durability procedures in P.G. to the strut assembly. 3.2. Test Equipment Specifications 3.2.1. Servo valve and actuators Vertical Type Specification Quantity Maker Servo valve TWIN 57 l/min 1 EA MTS Actuator 244.11 15kN 250mm 1 EA MTS 3.2.2. Sensor Sensor (
6、Load cell and LVDT) Vertical Type Specification Quantity Maker Load cell 661.19F-03 15kN 1 EA MTS LVDT 250mm 1 EA MTS 3.2.3. Oil pressure system 1) HSM (Hydraulic Service Manifold) Type 293.11A Specification 190 l/min ( 3 STATION OUTLET) Quantity 1 Set 2) Head and base swivels Quantity 1 Set 3) Hose
7、 Specification 3m Quantity 1 Set 3.2.4. Controller MTS 407 controller 1) Analog PIDF controller Proportional range 0 - 100 V/V P Proportional resolution 0.025 V/V (12BITS) Integrator range 0 - 1000 RPS I Integrator resolution 0.244 RPS (12BITS) Differential range 0 - 40 ms D Differential resolution
8、0.0098 ms (12BITS) Feedforward range 0 - 40 ms F Feedforward resolution 0.098 ms (12BITS) 2) Power supply Line voltage 90 - 250 Vac (Startup) EDS-T-2539FRONT STRUT ASSEMBLY VERTICAL LOADING DURABILITY PAGE: 3/4 ISSUED DATE: 2005. 09. 07 REVISED DATE: . . VERSION: 1 GM DAEWOO Auto & Technology 85 - 2
9、50 Vac (Operation) Line frequency 47 - 440 Hz 3) 407. 12 DC conditioner DC excitation Range: 0 - 20V Differential (Programmable) Resolution: 5mV (12 BITS) Amplifier Input impedance : 1Mohm 4) 407. 14 AC conditioner AC excitation Range: 0 - 40 Vpp Resolution: 10Mv Amplifier Input impedance : 1 Mohm m
10、inimum 5) 407. 16 valve driver Input (valve command) +/- 10V Full Scale 4. TEST PROCEDURE 4.1. Displacement Transducer Sensor Install To obtain displacement data, mount displacement transducer to the vehicle by attaching it to the strut assembly toward the vertical direction. 4.2. RLDA Perform RDLA
11、according to its procedures (EDS-T-0002). 4.3. Drive File Generation Perform the process of data editing, FRF calculation, initial drive file generation, and iteration to generate a drive file in each road condition. EDS-T-2539FRONT STRUT ASSEMBLY VERTICAL LOADING DURABILITY PAGE: 4/4 ISSUED DATE: 2
12、005. 09. 07 REVISED DATE: . . VERSION: 1 GM DAEWOO Auto & Technology D.T. VEHICLE BODY Fig 2. Displacement Transducer Install 4.4. Test Specification Conduct fatigue durability test on strut assembly by reproducing vertical displacement which affects on-road strut assembly based on the durability sc
13、hedule (EDS-T-9253) after measuring the on-load displacement data on Beijing Proving Ground Set durability target at BJPG PAVE 2.2k 100%. Conduct durability cycle as follows. SPL Size Set Durability Cycle (PAVE 2.2k) 3 100 % 4.4.1. Back up the drive file used using a CD and keep it with the test dep
14、artment and name the file as indicated in the drawing. 4.5. Test & result z Check during the test every two hours if there is any failure and metal crack, etc. If any, replace it and then proceed with the test. z Sampling for the strut system test must be done for 3 sets. * Refer to EDS-T-2533 for other test procedures. * Refer to EDS-T-9253 for durability test procedures of BJPG PAVE 2.2k
