A micro-cow level hybrid propulsion system and method based on gas working substance

By combining symmetrically arranged high-pressure gas cylinders and high-pressure isolation valves, mechanical pressure reducers and intelligent control units, the problem of center of gravity drift caused by uneven working fluid consumption in the micro-Newton level propulsion system is solved, achieving efficient, quiet and high-precision operation across the entire thrust range, and adapting to various mission requirements.

CN121134051BActive Publication Date: 2026-06-26BEIJING INST OF CONTROL ENG
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Patent Information

Application Number
CN202511585189.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-10-31
Publication Date
2026-06-26
Estimated Expiration
2045-10-31

AI Technical Summary

Technical Problem

Existing micro-Newton level propulsion technology, when combined with cold gas and electric propulsion, suffers from centroid drift due to uneven propellant consumption, and lacks accuracy and stability at extremely low thrust, making it difficult to achieve optimal efficiency across the entire thrust range.

Method used

The system employs symmetrically arranged high-pressure gas cylinders and high-pressure isolation valves, parallel supply branches, and mechanical pressure reducers, combined with an intelligent control unit, to achieve intelligent thrust distribution and working fluid balance. The mechanical pressure reducer eliminates vibration and noise caused by the operation of the solenoid valve, and a thrust distribution strategy based on the thrust critical point is adopted.

Benefits of technology

It achieves center-of-gravity stability and high-efficiency operation across the entire thrust range, significantly improving the system's quietness and control precision, broadening the thrust range, and enhancing fuel utilization and mission reliability.

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Abstract

The present application relates to the technical field of spacecraft propulsion system, and more particularly to a micro-newton hybrid mode propulsion system and method based on gas working substance. The system comprises a gas storage unit, a gas supply unit, a thruster unit and a propulsion system driving and control unit. The gas storage unit adopts symmetrically arranged high-pressure gas cylinders connected through high-pressure isolation valves, and in combination with the automatic balancing strategy of the control unit, effectively solves the problem of on-orbit centroid drift. The gas supply unit includes parallel cold gas propulsion branches and electric propulsion branches, and each branch adopts a mechanical pressure reducer to eliminate vibration and noise caused by electromagnetic valve action from the source, realizing super-static operation of the system. The propulsion system driving and control unit controls the micro-newton cold gas thruster and the micro-newton electric thruster to work alone or in cooperation according to the distribution strategy based on the thrust critical point, realizing the optimal comprehensive efficiency of high precision and high specific impulse in the full thrust range, and being suitable for ultra-high precision space scientific exploration missions.
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