研究目的
To determine the positions of debris collision spacecraft accurately using a two-dimensional PVDF piezoelectric film sensor system.
研究成果
The debris positioning system based on two-dimensional orthogonal stacked PVDF film strips accurately determines impact positions, velocities, and incidence angles. Visualization is achieved through LABview programming. Future work should focus on improving accuracy, testing with different particle sizes, and expanding to larger areas and multiple fragments.
研究不足
The positioning accuracy may be affected by factors such as stress wave propagation, projectile breakup, and signal noise. The method's effectiveness for smaller debris particles and larger areas needs further validation. Engineering applications and detection thresholds for various impactor sizes require more exploration.
1：Experimental Design and Method Selection:
The experiments were performed using a two-stage light gas gun loading system and a self-constructed positioning system based on the piezoelectric effects of PVDF film. Orthogonal stacking two-dimensional PVDF film strips were impacted at different collision speeds to extract piezoelectric signals.
2：Sample Selection and Data Sources:
Solid spherical aluminum projectiles with a diameter of 4.8 mm were used as debris sources. PVDF film strips with dimensions 140 mm x 20 mm x 3 μm were encapsulated and used as targets.
3：8 mm were used as debris sources. PVDF film strips with dimensions 140 mm x 20 mm x 3 μm were encapsulated and used as targets.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Two-stage light gas gun, PVDF piezoelectric film strips, data acquisition card (USB-6363 model from NI company), LABview software, sampling resistors (50 Ω), vacuum chamber (vacuum < 20 Pa), magnetic speed measuring device.
4：Experimental Procedures and Operational Workflow:
The chamber was pumped to vacuum. Projectiles were accelerated and impacted the PVDF targets. Signals were acquired via data acquisition card connected to PVDF strips, processed using LABview for visualization of impact positions. Speed was measured magnetically.
5：Data Analysis Methods:
Signal amplitudes from PVDF strips were compared to determine impact positions. Velocity and incidence angle were calculated based on time differences and spacing between targets using formulas such as V = S / Δt.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
