Real-time Collision Detection Technique for Captive Trajectory Simulation System in Transonic Wind Tunnel

The Two-Sting Rig(TSR) is a wind tunnel test device designed to simulate the six degrees of freedom(6-DOF) motion of a store separating from its carrier platform. In such confined and high-risk environments, real-time collision detection is essential to prevent equipment damage and ensure operational safety. This paper proposes a real-time collision detection method that models the TSR and surrounding wind tunnel structures, such as aircraft models and support stings, using simplified geometric primitives. The method is specifically designed for enclosed test environments where external sensing is impractical due to structural constraints, and instead relies solely on internal motor feedback. The proposed algorithm is integrated into the TSR control software and validated across multiple operational scenarios. Experimental results confirm that the method reliably detects proximity risks in real-time, with execution times averaging under 0.95 ms, ensuring seamless integration into the 20 ms control loop. These findings demonstrate the algorithm’s effectiveness and practical suitability for real-time integration in wind tunnel operations.