LDC20 Low-Disturbance Gimbal
Sierra Space
Qualified bi-axis gimbal engineered for low-disturbance, open-loop operation in critical spaceflight pointing applications.
Typed specifications30 values
Discloses 5 of 9 fields engineers filter by in this category (category median 2).
- Mass
- 8.2 kg datasheet p.180 8.2 kg 18 lbm
- Travel range per axis
- 99 deg max · about the X- and Y-axis · datasheet p.179 -99–99 deg about the X- and Y-axis
- Angular resolution (step)
- 0.007 deg at 64 Microstep Resolution · datasheet p.180 0.007 deg step size at 64 microstep resolution
- Output torque
- 13.6 mN·m Powered Holding Torque · datasheet p.180 0.34 mN·m Unpowered Holding Torque
- Power consumption
- 15 W total power capacity for Y actuator transition · datasheet p.179
- Operating temperature
- -25 °C min · datasheet p.180 70 °C max | -25–70 °C
- Mechanism type
- two-axis gimbal (general purpose) antenna and camera pointing, solar array drives · datasheet p.1
- Axes
- 2 bi-axis, X and Y · datasheet p.1
- Propulsion family
- 500 product page
- Motor type
- stepper motor permanent magnet microstepping stepper motors, 2- or 3-phase · datasheet p.1
- Transmission
- harmonic drive precision harmonic drives · datasheet p.1
- Holding torque (unpowered)
- 13.6 mN·m powered, 120 in-lb · datasheet p.2 0.34 mN·m unpowered holding torque, 3 in-lb
- Survival temperature
- -60 °C min · Nonoperating Temperatures · datasheet p.180 75 °C max · Nonoperating Temperatures | -60–75 °C nonoperating
- Flight heritage
- GeoEye datasheet p.180
- Slew speed
- 8 °/s output rotational rate · datasheet p.2
- Position feedback
- optical encoder optional, redundant optical encoders · datasheet p.2 potentiometer redundant telemetry potentiometers, absolute position
- Signal transfer across the joint
- waveguide rotary joint available with coax or waveguide rotary joints · datasheet p.2 twist capsule rotary twist capsule, 24 channels, 15 W total power capacity | RF rotary joint two RF channels through RF rotary joints at the actuators
- Launch lock included
- yes integral launch lock, high output paraffin (HOP) actuator · datasheet p.1
Each value is typed with its unit and measurement condition and cites the datasheet page it was taken from. Nothing is guessed: a field that is absent here has not been published by the manufacturer. machine-extracted ✓ checked by NewSpace Market ✓ manufacturer confirmed by the manufacturer.
As published by the supplier17 lines, in the manufacturer's own wording
- Configuration
- Bi-axis, open-loop
- Status
- Qualified for spaceflight
- Mass
- 8.2 kg
- Resolution
- 0.007 deg
- Output Rotational Rate
- 8 deg/s
- Powered Holding Torque
- 13.6 nm
- Unpowered Holding Torque
- 0.34 nm
- Torsional Stiffness
- 11,300 nm/rad
- Winding Resistance
- 23 Ω
- Dielectric Strength
- 500 Vdc
- Insulation Resistance
- 100 M Ω
- Insertion Loss
- <1.5 dB
- Frequency
- 8.025 – 8.4 GHz
- Power
- <10 W
- VSWR Ratio
- <2.1:1
- Operating temperature
- -25 °C to +70 °C
- Nonoperating Temperatures
- -60 °C to +75 °C
About
The LDC20 Low-Disturbance Gimbal is an innovative bi-axis gimbal from Sierra Space that sets new standards for low-disturbance, open-loop operation when paired with a microstepping drive. The gimbal has completed qualification and is available for critical spaceflight applications requiring minimal disturbance to be imparted on the host spacecraft.
Documentation
Need the full ICD, test reports or a specific revision? Ask the supplier directly.