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The Solar Array Drive Electronics (SADE) allows command of the mechanism which ensures rotation of the solar array. 
click for larger image
The SADE consists of : - DC/DC module which provides :
- All secondary voltages need for the application
- ON/OFF commands and associated status - SADE module which provides
- Regulated current source for north and south stepper motors
- Position sensors interface (potentiometers and optical switches)
- Serial TM/TC interface (ML16/DS16 protocol) 
click for larger image
The SADE meets all requirements defined in the customer specification requirements.
The design, development and manufacturing plan of SADE is cut in four phases : - Phase one consists of the design and development of electrical and mechanical parts to hold a Critical Design Review (achieved in 6 months)
- Phase two consists of the EM manufacturing and shock qualification (achieved in 4 months)
- Phase three consists of the SADE EM coupling test with SADM (mechanism) (achieved in 2 months)
- Phase four consists of manufacturing the PFM1 leading to perform the full qualification sequence (electrical full performance, vibration tests, thermal vacuum tests, electromagnetic compatibility test (achieved in 5 months)
The SADE is able to drive two stepper motors controlled in microstep by a current sources and to monitor associated position sensors.
The development of the SADE being based on a sufficient versatility to meet most requirements, this equipment has a sale potential as it may be addressed to various primes and may be adapted to different platforms.
The SADE is now fully qualified for SPACEBUS platform. All images courtesy of project team
Last Update: 27 Jun 2006
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