4.4.5 - Electrical Power & Distribution Subsystem (EPDS)

4.4.5-10 Level 2 Tasks

Tasks Applicable Mission Phases Description SFWC Artifacts References
4.4.5-10-1 Ensure all units and components have met their requirements and verification evidences are documented Phase B | Phase C | Phase D1 | Ensure reworked units are tested in accordance with applicable specifications and standards. Ensure verification progress is tracked using the verification ledger/matrix. NA NA Space Vehicle Systems Engineering Handbook, TOR-2006(8506)-4494
4.4.5-10-2 Ensure subsystem has met all of its requirements and evidences are documented Phase D1 | Ensure that unit-to-bus system level testing verifies performance at temperatures and other environmental extremes at all levels of testing. Ensure that unit level testing stresses the unit as built to reveal issues at the lowest level of build and test. Ensure verification progress is tracked using the verification ledger/matrix. NA NA Space Vehicle Test and Evaluation Handbook, TOR-2011(8591)-2
4.4.5-10-3 Ensure hardware and software requirement buy-offs are completed as appropriate for subsystem Phase D1 | Ensure requirements are verified to the lowest level. Ensure any exceptions are addressed prior to approval. Ensure all requirement buy-off packages are documented. NA NA Space Vehicle Test and Evaluation Handbook, TOR-2011(8591)-2
4.4.5-10-4 Ensure all subsystem development anomalies and failures are documented and dispositioned in accordance to approved processes Phase D1 | Ensure that all components related to the anomaly are evaluated for overstress, including Acceptance Data Packages, Qualification Test Reports and raw test data when available. Ensure that any cross-program systemic issue is submitted to problem alerting processes. NA NA Mission Assurance Guide, TOR-2007(8546)-6018, Rev B, ITE chapter.
4.4.5-10-5 Ensure review of all verification and corrective action data for all developed hardware and software Phase D1 | Ensure all stakeholders review all test data and discrepancy documentation and have an opportunity to provide comments and recommendations for corrective action. NA NA Space Vehicle Systems Engineering Handbook, TOR-2006(8506)-4494; Mission Assurance Guide, TOR-2007(8546)-6018, Rev B
4.4.5-10-6 Ensure that system recovery and failure modes perform as anticipated Phase D1 | Ensure baseline, thermal-vacuum and factory acceptance testing of subsystem includes entry into, and successful exit from, safe-modes. Ensure results of testing are analyzed for expected subsystem responses. NA NA Space Vehicle Test and Evaluation Handbook, TOR-2011(8591)-2
4.4.5-10-7 Ensure review of thermal vacuum or thermal balance test data for component temperatures, heater usage, and energy balance Phase D1 | Trending of specific data should also be performed. Ensure summary and detailed report (for PDR, present what has been completed, or indicate a due date when the item will be completed). NA NA Space Vehicle Systems Engineering Handbook, TOR-2006(8506)-4494
4.4.5-10-8 Ensure solar array design qualified by test per AIAA S-112A-2013 Phase B | Phase C | Phase D1 | Full array assembly is generally tested with SV in acoustic test, but can substitute other tests if impractical because of size. Ensure design analysis and test verifies adequate thermal and thermal structural integrity for performance over mission life. NA NA Space Vehicle Systems Engineering Handbook, TOR-2006(8506)-4494; Qualification and Quality Requirements for Space Solar Cells, AIAA S-111A-2014; Qualification and Quality Requirements for Electrical Components on Space Solar Panels, AIAA S-112A-2013