GPS Sensor Electronics Unit Environmental Stress Screening Test Technique

摘要

The Environmental Stress Screening test objective is to validate proper manufacturing and find any manufacturing defects in a flight unit before delivery by using temperature modulation and vibration simulations. The ESS test performs temperature cycling and employs random vibrations to test the reliability of the unit. Temperature regulation is also provided via the poly-alpha-olefin (PAO) coolant flowing through the unit under test (UUT), which is controlled by a cooling system. The UUT is electronically stimulated and monitored by a Test Bench designed for functional testing of the article. Depending on the test requirements, the satellite tracking capability can be tested by a satellite simulator or live satellites as shown in Figures 1 and 2.