Abstract
Aero-optical effects reduce the accuracy of optical sensors on high-speed aircraft. Current research usually focuses on light refraction caused by large-scale density structures in turbulence. A method for analyzing photon energy scattering caused by micro-scale structures is proposed in this paper, which can explain the macro image distortion caused by moving molecules in inhomogeneous airflow. Quantitative analysis of the propagation equation indicates that micro-scale structures may contribute more to the wavefront distortion than the widely considered large-scale structures. To analyze the micro mechanism of aero-optical effects, a transient simulator is designed based on the scaling model of transient distorted wavefronts and the artificial vortex structure. The simulation results demonstrate that correct aero-optical phenomena can be obtained from the micro mechanism of photon energy scattering. Examples of using the transient simulator to optimize the parameters of the star sensor on a hypersonic vehicle are provided. The proposed analysis method for micro-scale structures provides a new idea for studying the aero-optical effects.
| Original language | English |
|---|---|
| Article number | 2199 |
| Pages (from-to) | 1-28 |
| Number of pages | 28 |
| Journal | Sensors |
| Volume | 21 |
| Issue number | 6 |
| DOIs | |
| State | Published - 2 Mar 2021 |
Keywords
- Artificial vortex structure
- Micro mechanism of aero-optical effects
- Micro-scale density structure
- Photon energy scattering
- Scaling model of distorted wavefront
- Star sensor of hypersonic vehicle
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