Attitude & propulsion control

Introduction to Attitude & Propulsion Control

Attitude control and propulsion control are the two core subsystems for motion control in spacecraft, satellites, and aircraft. The former ensures attitude stability and alignment (orientation, pitch, roll, yaw), while the latter provides propulsive power and trajectory control. Together, they guarantee that aerospace equipment operates precisely according to mission requirements.

Attitude Control

The objective of attitude control is to maintain or adjust the orientation of spacecraft or aircraft. It ensures that sensors, antennas, and payloads are aligned with the intended target. Common actuating components include:

Reaction wheels – For fine adjustment of satellite orientation.
Control moment gyroscopes – For larger torque and agile maneuvers.
Thrusters – Providing small corrective forces in space.
Magnetic torque devices – Using interaction with Earth’s magnetic field for attitude adjustment.

Propulsion Control

The propulsion control system provides the required thrust and trajectory management, enabling operations such as:

Orbit transfer and station-keeping for satellites.
Takeoff and landing propulsion for rockets or aircraft.
Speed adjustments and interplanetary maneuvers.

Typical actuating components include chemical rocket engines (solid/liquid fuel), electric propulsion systems (ion thrusters, Hall effect thrusters), and aero engines such as turbofan and turbojet engines.

Collaboration Between Attitude & Propulsion Systems

Attitude and propulsion systems are closely linked. The thrust direction of propulsion must be calibrated by the attitude control system to ensure precision. Conversely, attitude adjustment may require propulsion support to provide auxiliary torque. This synergy ensures accurate maneuvering, mission stability, and efficiency.

Role of SiC & IGBT Devices in Aerospace Control

High-reliability semiconductor devices are critical to both systems. Baoquan Zhijie offers:

SiC MOSFETs – High-frequency switching, enabling efficient motor and inverter control in reaction wheels and electric propulsion systems.
IGBT Modules – Supporting high-voltage, high-current propulsion circuits with stable and durable performance.
Power Modules – Providing integrated, compact solutions for aerospace electronic subsystems.
Diode Modules – Ensuring reliable rectification and surge protection for spacecraft power distribution.

Why Baoquan Zhijie

Baoquan Zhijie empowers aerospace and aviation with high-efficiency SiC MOSFETs, IGBT modules, and power solutions. Our components support the strict requirements of attitude and propulsion control systems, ensuring long-term reliability, lightweight design, and mission safety in demanding space and aerospace environments.