Tensor Tech CMG-20m Control Moment GyroscopeVendor: Tensor Tech
CMG-20m has two variable-speed, single-gimbal Control Moment Gyroscope (CMG) which is suitable for 6U CubeSats. Unlike traditional CMGs, each driven by two or three motors, this CMG is each driven by only one spherical motor, making it capable of minimizing into a CubeSat form factor. Serving as an attitude actuator component, the CMG-20m has to be commanded by the user’s onboard computer (OBC) or ADCS computer. Torque and speed modes are available for the OBC or ADCS computer to switch between.
The user’s controller design can be simplified by adopting the torque mode. However, the output torque is only accurate when the satellite has a tumbling rate of < 1 deg/second. The speed mode allows the user to manipulate the inner rotor speed and the gimbal angle. It is designed for advanced users who will derive the CMG steering and control laws by themselves.
The system achieved flight heritage in 2022.
- Offering improved torque at lower power consumption versus reaction wheels
- Cost-effective solution with high performance
- Compatible with a wide range of satellite configurations
- Comprehensive software support and free technical support
Tensor Tech (Sheet)
- Official website – Tensor Tech CO., LTD.
- ADCS Series – Integrated Attitude Determination and Control Systems
- CMG Series – Control Moment Gyroscope
- Fine & Coarse Sun Sensor
- ADCS Testbed
||4 to 7 months|
|Angular Momentum Storage||< 20 mNms for 1-axis;
< 10 mNms for 2-axis (adjustable)
|< 2 mNm for 1-axs;
< 1 mNm for 2-axs (adjustable)
|Inner rotor speed control accuracy|
|< 5 rpm|
|Tilting angle control accuracy|
|< 1 deg|
|Optional||GNSS system and 3-axis magnetorquers|
|Rotor imbalance||ISO 1940 G0.4|
|Tuna-can & 0.4U (< 600 g)|
|Power consumption @ 5V bus|
|Power consumption @ 3.3V bus|
|2x Tuna-can & 0.2U (< 500 g)|
|I²C, UART and RS485/422 *(optional)|
*The user can only select one of the two.