Health Management For Thermal Protection System On RLV And Landing Gear Design For An UAV

When a Reusable Launch Vehicle (RLV) travels through the atmosphere there should be strong aero heating around it, so a Thermal Protection System (TPS) would be used to protect the vehicle structures from aero thermal ablation. However, the TPS structure may fail more frequently than normal vehicle structures because of the severe environment and load conditions, while a TPS failure can even lead to a catastrophic breakdown of vehicle structures. To keep the RLV safe, the TPS must be monitored real-time. To learn the heat transfer inside a ceramic TPS tile finite element models are built, and computation made with them indicates that temperature monitoring and frequency monitoring of the TPS structure should be effectual for fault detection. Health management for TPS is one of the key technologies for space vehicle. The paper puts forward a method that analyze and valuation the system states by monitoring the key function index sign of TPS. The concept of health management for Thermal Protection System of space shuttle and the principles of health monitoring are introduced. Combine to inquiry into the relevant problem of the health management from the angle of consider the accident damage. Make use of the ANSYS software to simulate and analyze the temperature distribute of Thermal Protection tile suffered of reentry space shuttle damaged by different degree, demonstrate the feasibility of the method.The landing gear system is the indispensable important system of the unmanned aircraft vehicle (UAV). The relevant organizations involved usually include absorbing system, undercarriage tyre, brake slip resistance system, landing gear shimmy dampers, retracting-lowering system, etc. This report has carried on the preliminary systematic conceptual design of undercarriage based the total arrangement characteristic of the UAV. Confirmed the initial overall arrangement form and erection site of the undercarriage, had calculated out the ground load and chosen the suitable tire type. Have estimated the journey of the buffer and geometry size of the undercarriage, designed the simple and effective retracting-lowering system of the undercarriage. Finally, the paper has estimated the total weight of the undercarriage system.