Compound actuation system design for an advanced space transportation reusable orbiter

摘要

The SL-12 is a reusable space orbiterwhich offers the capability to go beyond the notion of a second generationspace shuttle, and is targeted to be in operation in the year 2020. SL-12Orbiter utilizes gimballing of the main rocket engines for control duringascent and typical aerodynamic surfaces for control during re-entry, approach,and landing. Power by wire (PBW) Actuation system is used for SL-12 based onAll Electric Aircraft (AEA) approach. Electro Hydrostatic Actuators have beenused for Primary Flight Control surfaces (Elevon, Body Flap and Rudder) andThrust Vector Control for Main Engine Module, Electro Mechanical actuators havebeen used for Thrust Vector Control of Orbital Maneuvering System and Payloadbay door. Dual redundant electric power supply channels are used forredundancy. Actuation System Safety and Reliability analysis has been done toensure compliance and specification requirements.