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SACS

Satellite Attitude Control Simulator

SACS: rotational air bearing platform with a small satellite mounted for ADCS testing

Overview

The SACS is an advanced testing platform designed for the comprehensive validation of attitude determination and control system (ADCS) subsystems in satellites under 40 kg. By utilizing a three-degrees-of-freedom rotational air bearing and a sunlight emulator, the system provides a near-zero-friction environment to simulate orbital conditions. It is equipped with a sensor suite, including a gyroscope, magnetometer, and accelerometer, to ensure accurate attitude estimation and full-scale validation of the flight hardware before launch. Additional specifications can be included upon request. SACS is a versatile facility for hardware-in-the-loop validation of small-satellite ADCS sensors, actuators, and algorithms. It enables the study of performance, operational bounds, and fault detection, isolation, and recovery (FDIR) solutions under strictly controlled conditions. It has been used extensively in the E.T.PACK-F project to validate the ADCS of an autonomous 12U deorbit device.

SACS — specifications

Rotational air bearing

Test objects
Up to 40 kg
Degrees of freedom
3 DOF — X and Y axes ±20°, Z axis 360°
Mass
12 kg
Plate diameter
40 cm

Attitude estimation

Heading
Inclination
0.5°

Sensors and actuators

Sensor suite
Gyroscope, magnetometer, accelerometer, sun emulator
Compatible actuators
Reaction wheels, cold gas systems, magnetorquers
Orbital environment
Sunlight and albedo emulator

Use Cases

For small-satellite teams that need hardware-in-the-loop validation of ADCS sensors, actuators, and algorithms before launch, including performance studies, operational bounds, and fault detection, isolation, and recovery (FDIR) testing under controlled, near-zero-friction conditions.

Interested in SACS?

Download the data sheet, or get in touch with our engineering team to discuss integration for your mission.

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