Electro-Hydrostatic Rocket Servo

Electro-hydrostatic rocket servo actuation is the engine-control approach highlighted in 如何「兜住」一颗火箭？｜ S10E21. The episode says Long March 10B / 长征十号乙 uses an electro-hydrostatic servo that combines electric actuation with hydraulic force transmission for engine gimbal control.

The source frames the servo as the rocket’s “muscle” in terminal descent. Traditional hydraulic servos can be reliable but heavy and leakage-prone, while purely electric systems can reduce weight but raise reliability and jam-risk questions. The electro-hydrostatic route is presented as a compromise for precise, high-load, high-reliability attitude control during final recovery.

Connections

• Long March 10B / 长征十号乙 — vehicle whose terminal control uses the servo approach in the source.
• Rocket Propellant Settling — adjacent relight prerequisite before stable terminal control.
• Sea-Net Rocket Recovery and Marine Recovery Platform Control — final capture depends on accurate attitude and trajectory control.
• Rocket Recovery Route Choice — subsystem tradeoff inside different recovery architectures.