Design and Optimization of Internal Gear-planetary Gear Compound Transmission for a Space Mechanism
The gear transmission constitutes the core mechanical component of the space mechanism,undertaking the responsibilities of relocking spacecraft sections and providing docking assistance.There persists a continuous demand for a high-torque,high-efficiency,long-life,and lightweight design and optimization of the gear transmission in the space mechanism.To fulfill the design requirements of the gear transmission for a space mechanism,a compound planetary gear transmission scheme of"two-stage internal gear pairs and three-stage 2K-H planetary gears"is proposed,and the gear structure design is accomplished.A multi-objective optimization model for the gear transmission of the space mechanism based on multi-criterion decision making is established,enabling rapid solutions for 49 parameters.With lightweight,high reliability,and high efficiency as the optimization targets,a reduction of 5.02%in the weight of the gear transmission and an improvement of 8.01%in the safety factor of the gear transmission are achieved.It offers theoretical approaches for the research of gear transmissions in new generations of advanced space mechanisms.
Space mechanismGear transmissionCompound planetary transmissionMulti-criterion decision makingPerformance optimization
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