China Aerospace Science and Technology Corporation

Analytical Guidance for Reentry Vehicles Based on Range–Energy Efficiency

To address the reentry guidance problem of hypersonic glide vehicles under complex constraints and terminal area energy management (TAEM), a nonlinear analytical guidance method based on the concept of range–energy efficiency (REE) is proposed. First, a linear energy dissipation...

Equivalent End-Weakening Governing Crushing Modes and Crashworthiness of CFRP Tubes with Different End Triggers Under Quasi-Static Axial Compression

Quasi-static axial crushing tests were carried out on CFRP tubes with various end triggers (chamfer, tulip, crown, notch), aiming to reveal the joint regulation mechanism of geometric configuration and equivalent end-weakening on the crushing behavior of the tubes. Load–displacem...

A Data–Physics Dual-Driven Intelligent Diagnostic Method for Downhole Drilling Risks

Safe drilling in hydrate-bearing sediments is essential for environmentally responsible natural gas hydrate development. Complex pressure variations, fluid migration, and mechanical disturbances during drilling may increase the risks of gas influx, lost circulation, pipe sticking...