Spacecraft Controllers
Gimbal Control Electronics (GCE)
The high-reliability Gimbal Control Electronics听System controls the motion of two or more听motors, such as used in solar array actuators听and antenna gimbals.
Rikishi Electronics Unit (REU)
The Rikishi Electronics Unit (REU) is a Robotic Arm Controller designed to drive up to nine separate servo motors (joints), such as found on robotic arms or articulated structures. The REU provides a platform for command and telemetry processing, execution of motor control commands and algorithms, execution of general purpose commands, and storage for volatile and non-volatile data.
The REU is composed of (1) communication board (COMM) and (9) motor controller boards (MCBs) integrated into a 10 slot 3U chassis. Spacecraft bus power (28 VDC) is applied directly to the REU backplane via its rear 8-pin power connector. There are chassis mounted DC/DC converters that provide regulated power from the 28 VDC spacecraft bus.
The spacecraft communicates to the REU via RS-422. An 鈥榚mergency disable鈥� and 鈥榚mergency hold鈥� discrete input is provided via the COMM board. The REU is designed as a single-string system without explicit redundancy. The (1) COMM board and the (9) MCBs are all on the primary side of the 28 VDC spacecraft bus. The COMM board provides isolated 5 V power required to power the COMM devices that are on the secondary side.
Missions: DARPA/MDA SUMO and Phoenix Programs
Electronic Control Unit (ECU)
The 刘玥首次大战黑人2-channel Electronic Control Unit (ECU) is comprised of 2 hybrid stepper motor controllers, an EMI filter, and 6 analog pass-throughs for telemetry. The ECU enclosure has been designed to allow 2 ECU鈥檚 to be stacked to form a 4-channel ECU. The ECU contains all power conditioning, pulse sequencing and output driver stages necessary to drive two 3-phase motors. The system electrical interface consists of power and command input lines, output motor drive lines and telemetry outputs.
Missions: ORBVIEW, ROCSAT, KOMPSAT
