Small Thruster Gimbal Assembly (S-TGA)
The Small Thruster Gimbal Assembly is a two-axis gimbal designed to support and articulate small electric propulsion engines used in space applications. The S-TGA is equipped with an integrated launch lock designed to support the electric propulsion engine during its launch environment. The launch locks are deployed by applying power to its Frangibolts. With the launch locks deployed, the gimbal is free to articulate through its two independent axes of rotation. Integrated propellant lines are used to feed the electric propulsion engine. These lines are nested at the center of the gimbal. Similarly, electrical power lines are located at the center of the gimbal and are used to facilitate the power, and telemetry needs of the propulsion engine. Customizable engine plate is used to adapt to various engine mounting configurations. This interface mounting plate is suspended on snubbers to attenuate the dynamic loads and provide reduced resonance at the engine.
Specifications
| Characteristic | Units |
Unit Weight |
10.6 lbs (Mass includes Radiator Plate and Interconnecting Thruster Plate) |
| Dimension (L W H) | 9.9 in x 9.9 in x 6.9 in |
| Operating Voltage28 VDC | 28 VDC |
| Motor Configuration | 3-phase, stepper |
| Operating Current | 0.269 (current limited) |
| Current Draw | 4.5 watts per axis |
| Pointing Resolution | 0.0375 degree |
| Pointing Accuracy | 0.025 degree |
| Total Range of Travel | ±18 degrees |
| Angular Velocity | 3.75 deg/sec |
| Position Holding Capability | 25 in-lb |
| Torque Capability | 70 in-lbs |
| Operating Temperature | -30 to +80 deg C |
| Position Knowledge | Potentiometers- absolute position sensor |
| Position Telemetry Accuracy | 1 degree |
| Propellant Lines | Two integrated 1/8-inch propellant lines |
| Launch Lock Mechanism Actuator Type | Frangibolt |
| Thermal Management | Heaters on the Actuators |
| Power Cable Management | Internally Routed through the Gimbal |
| Payload Capability | 8.27 lbs |
| Customizable Engine Mounting Plate | Yes |
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Space
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