scope:

Abstract:

HESSI: The structural qualification test, a sine-burst test on a shaker table, subjected the HESSI spacecraft to a major overtest condition that resulted in significant structural damage to the spacecraft. Recognize that environmental testing carries inherent risks. Proactively maintain and track the mechanical health of test facilities, and upgrade them as necessary. Employ "canned" tests for trending. Evaluate critical control system response data real-time during vibration testing (but prior to sine-burst). Prior to test, perform a vibration facility validation test for each planned test series that is representative of the actual test conditions. Provide for self-checks. Define test requirements in the test plan for each test, and ensure test operators have adequate data and training.