Abstract: 

Nonlinear three-dimensional motion radar imaging technology addresses the disruptive impact of complex, highly nonlinear motions exhibited by high-speed, highly maneuverable targets or radar platforms in three-dimensional space. Such motions are characterized by both highly nonlinear trajectories (e.g., abrupt turns, accelerated maneuvers) and coupled multi-degree-of-freedom attitude dynamics (e.g., time-varying pitch, roll, and yaw perturbations), which drastically alter electromagnetic wave propagation geometry and target scattering behavior. These effects lead to critical challenges, including phase incoherence accumulation, Doppler shift ambiguity, and resolution degradation, severely constraining high-speed target tracking and fine-feature inversion capabilities. For radar platforms (e.g., high-dynamic near-space vehicles, autonomous orbital satellites), strong coupling between nonlinear trajectories and attitude perturbations disrupts conventional steady-motion assumptions, causing spatiotemporal-frequency modulation distortions in echo signals. High-speed targets (e.g., hypersonic missiles, low-altitude penetration drones) further exacerbate uncertainties in target structure interpretation and motion parameter estimation due to rapid trajectory variations and nonlinear attitude dynamics, resulting in scattering center trajectory crossings and transient signal-to-noise ratio collapse. This session focuses on multiphysics-coupled modeling of 3D nonlinear motion, joint error propagation mechanisms of trajectory-attitude interactions, and dynamic robust imaging theories. By uncovering the underlying interference mechanisms of complex motion on radar signals and target scattering, it aims to establish a high-precision imaging framework for critical missions such as missile warning, space-air surveillance, and low-altitude threat detection, providing theoretical breakthroughs for target perception and battlefield situational reconstruction in extreme dynamic environments.

Session Chairs: