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The project concerns the development and qualification of two modules of the Payload Distribution and/or Interface Units. This development will increase the range of potential Platforms that can implement this unit and will avoid problems with export restrictions (ITAR free design).
The two modules are:
RT1553 module: This module forms the interface between the 1553 external bus and the internal OBDH bus.
CVIU module: This power supply module needs to be redeveloped in order to cover the full range of potential MAIN BUS voltages (28V, 50V, 100V) with ITAR free solution.
The objective of the project is to develop and qualify two RDIU/PLIU/PLDIU modules that allow covering a larger range of telecommunication platforms by increasing the range of Primary Power Bus voltages. In addition, export restrictions are avoided by implementing ITAR free solutions.
Two modules are concerned:
Two RT1553 modules (Nominal and Redundant) together with two CVIU modules (Nominal and Redundant) constitute the centralized management core of Power Distribution and Interface Units for export telecommunication payloads.
The main activity consists in the design, development and qualification of these two modules.
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The key issues in this project are:
Thanks to this new development, the next generation of Power Distribution and/or Interface Unit dedicated to export Payloads will allow to extend the customer range and selling of 3 to 4 PLIU/RDIU/PLDIU per year is expected.
This new generation allows to enlarge the product portfolio:
The PLIU/RDIU/PLDIU is in charge, under control of the platform main computer, of one or several of the following functions:
The overall PLIU/RDIU/PLDIU architecture is based on the following concept:
The PLIU/RDIU/PLDIU must fulfil the following key parameters:
The proposed architecture for the new CVIU module will allow to easily adapting to large Primary Power Bus range in order to be compliant to all platforms whatever the Main Power Bus voltage range. This module will reuse DCDC converter topology already developed and largely used for DCDC converter implemented in RF Payload units. The new module will use only ITAR free parts.
The RT1553 module performs the TM/TC interface with the redundant MIL1553 bus. It uses two main parts which are a microcontroller and a dedicated FPGA.
The current micro-controller being an ITAR part is proposed to be replaced by a non- ITAR one. Furthermore, it is envisaged to replace the current FPGA (no more used on other projects) by another one which is currently used on various projects at TAS in order to avoid obsolescence risk in short or mid-term.
The development activities are:
CVIU and RT1553 FM modules have been integrated in an equipment (PLIU) and successfully qualified in a PLIU PFM during the 1st quarter of 2011.