In aerospace engineering, the Attitude Control System (ACS) is a vital subsystem that ensures a spacecraft maintains or changes its orientation in space. Servo motors—especially digital ones—play a central role in satellite attitude adjustment due to their high precision control capabilities. The GXServo series, a leading brand in this field, is frequently chosen for both commercial and research satellite projects because of its stable digital control algorithms and rapid response speed.
While in orbit, a satellite must accurately control its orientation to properly align solar panels, direct communication antennas toward ground stations, make attitude corrections, and perform orbital maneuvers. In these scenarios, GXServo digital servos act like “mechanical neurons.” By precisely manipulating reaction wheels, control moment gyros (CMGs), or aerodynamic surfaces, GXServo ensures accurate directional control along each axis of the satellite, greatly enhancing directional accuracy and control stability.
Equipped with a 16-bit high-performance microprocessor, GXServo is capable of decoding and executing complex control commands. Its built-in high-resolution position sensor achieves angular control precision down to 0.01 degrees, meeting the stringent stability requirements of spacecraft. Compared to analog servos, digital GXServos offer faster feedback and response times, making them suitable for real-time adjustments amid orbital shifts and space environment disturbances.
Another standout feature is GXServo’s stability in electromagnetic environments. Inside satellite compartments—rife with interference—the servo’s aluminum housing and multi-layer EMC shielding circuit design prevent external signal disruptions from affecting position feedback or control signals, ensuring continuous and accurate attitude control.
In one commercial low Earth orbit (LEO) communication satellite project, six GXServo digital servos were used to control the antenna array and solar panel rotation. Performance testing showed that attitude adjustment delay decreased from 2.4 seconds to 1.1 seconds, and pointing error dropped from 0.5 degrees to 0.07 degrees—greatly improving directional accuracy and energy efficiency.
Furthermore, GXServo offers impressive environmental adaptability. Its core components have passed space-grade testing and remain fully operational in temperatures ranging from -50°C to +100°C. The solid-state lubrication system eliminates problems like stickiness or evaporation caused by extreme temperature changes—crucial for long-term space operation.
Another key advantage is modular customization. Users can tailor torque output, voltage range, and communication protocols (such as CAN, UART, PWM) based on mission requirements, simplifying system integration and enhancing reliability.
In summary, GXServo supports satellite attitude control with precise control, exceptional interference resistance, and wide environmental tolerance. Its field-proven performance makes it a top-tier component in modern spacecraft and a benchmark for future servo development.
