DELTA Motor Controllers

Background
The NASA Langley Research Center (LaRC) is undertaking the Deployable Observatory for improved Payload-to-Partner Line-of-sight in the Lunar Environment (DOPPLER) project along with the STMD Lateral Stabilization Methods (LSM) task. These projects require a motor control system capable of operating multiple axes through a single integrated unit. The goal is to procure a flight-heritage controller that can interface with selected flight computers, specifically the Q7 from Xiphos Systems Corporation, and brushless direct-current (BLDC) motors from Maxon Precision Motors, Inc. Motiv Space Systems has been identified as the contractor responsible for delivering the required motor controller system.

Work Details
The contract involves the procurement of a Motiv DELTA EDU motor controller system and related assistance services for the DOPPLER engineering development unit (EDU). The controller must be delivered as a complete integrated system, ready to operate as the motor control interface between the Q7 flight computers and Maxon motors. The specific products to be delivered include:

- Program Management Assistance Services: 1
- EDU Delta Controller – Five Axis: 1

Specifications for the EDU Delta Controller include:
- Five-axis control with 4 axes concurrent control
- Communications: 4x RS-422 (dual communication and debug channels), JTAG
- Operating voltage: 28VDC nominal with a maximum survival voltage of 40 VDC
- Motor compatibility: 3-phase Wye wound BLDC, 2-phase and 3-phase stepper motors
- External drive circuits: 4x 5 A phases, heater drive
- Commutation type: Hall
- Control modes: velocity, position, trap profiling, step control
- Package volume: 3” x 3” x 4.5”
- Quiescent power consumption: < 5W
- Mass: 1.0 kg

Additionally, items must include the original inspection and test report from Motiv Space Systems along with user documentation and technical manuals.

Period of Performance
The contractor shall deliver the products within 12 weeks after receipt of order.

Place of Performance
Items shall be delivered to NASA Langley Research Center, Hampton, VA 23681-2199.