7.4.1. List of miscellaneous items

Table 7.4.1 presents the miscellaneous items for which a reliability “standard model” is defined (refer to Section 7.4.7 and Section 7.4.8).

The reliability model derived from IOR data gathers in fact all the elements related to an “equivalent class” and is only valid for this class of miscellaneous items. The related numerical values are provided in Table 7.4.8.

To use the reliability model, it is, first, necessary to assess that the miscellaneous item considered falls in the scope of the model definition. The “standard model” refers to a class of miscellaneous item identified by the main functions which are supported, the parameters reflecting the reliability (quality…) and the operating conditions.

Table 7.4.2 provides additional information for the miscellaneous items for which no “standard model” is provided (the list is not exhaustive, refer to Section 7.4.7).

Table 7.4.1 List of miscellaneous items with “standard model”

REF SUBSYSTEM UNIT / ITEM RELIABILITY DATA RF - Radio Frequency STD_001 PAYLOAD TWTA, Single MPM Constant failure rate STD_002 PAYLOAD TWTA, Double MPM Constant failure rate PWR - Power STD_003 POWER BATTERY CELL GEO Constant failure rate STD_004 POWER BATTERY CELL LEO Constant failure rate STD_005 POWER SOLAR ARRAY CELL Si Constant failure rate STD_006 POWER SOLAR ARRAY CELL GaAs Constant failure rate STD_007 POWER SADM (Solar Array drive Mechanism) GEO Constant failure rate STD_008 POWER SADM (Solar Array drive Mechanism) LEO Constant failure rate PROP - Propulsion STD_009 PROPULSION THRUSTER Constant failure rate STD_010 PROPULSION TANK TUBING probability of failure AOCS - Attitude and Orbit Control System STD_011 AOCS RW (Reaction Wheel) GEO Constant failure rate STD_012 AOCS RW (Reaction Wheel) LEO Constant failure rate DEP - Deployment STD_013 DEPLOYMENT DEPLOYMENT DEVICE Antenna, boom Probability of failure STD_014 DEPLOYMENT DEPLOYMENT DEVICE Solar Array Probability of failure

Table 7.4.2 List of Miscellaneous items with “non-standard model”

REF SUBSYSTEM UNIT / ITEM RELIABILITY DATA RF - Radio Frequency N-STD_001 PAYLOAD RF PASSIVE Refer to user experience PWR - Power N-STD_002 POWER CONNECTORS Not covered in this part, see Part 3 - EEE of this handbook PROP - Propulsion N-STD_003 PROPULSION HET (Hall Effect Thruster) Refer to user experience N-STD_004 PROPULSION VALVE LV (Latching Valve) Refer to Manufacturer data N-STD_005 PROPULSION VALVE FCV (MONO STABLE) Flow Control Valve Refer to Manufacturer data N-STD_006 PROPULSION VALVE PYRO VALVE Refer to Manufacturer data N-STD_007 PROPULSION PT (Pressure Transducer) Refer to Manufacturer data N-STD_008 PROPULSION FILTER Refer to Manufacturer data THER - Thermal N-STD_009 THERMAL HEAT PIPES Refer to Manufacturer data N-STD_010 THERMAL THERMO SWITCH Refer to Manufacturer data N-STD_011 THERMAL HEATER PYRO - Pyrotechnics N-STD_012 AOCS Pyro Actuator Based on Tests results (Bruceton, PROBIT, severe, one-shot, Neyer tests) DEP - Deployment N-STD_013 NEA Non Explosive Actuator Other N-STD_014 PAYLOAD OPTICS Based on Manufacturer data. Mechanical models for structural failure mechanisms and radiation degradation (wear-out) N-STD_015 ALL OPTRONICS Not covered in this part, see Part 3 - EEE of this handbook