激光引信以体积小、分辨率高等优势,广泛应用于弹药领域,其动态探测能力决定毁伤效能。当前激光探测已经从单点探测转向线阵扫描开展,但仿真研究多限于单一场景,动态模拟能力和实时计算效率不足,为此提出动态扫描探测模型、多材质散射...激光引信以体积小、分辨率高等优势,广泛应用于弹药领域,其动态探测能力决定毁伤效能。当前激光探测已经从单点探测转向线阵扫描开展,但仿真研究多限于单一场景,动态模拟能力和实时计算效率不足,为此提出动态扫描探测模型、多材质散射模型与高效并行计算方法,并基于此设计全链路激光线阵成像仿真系统。通过建立激光线阵推扫模型和弹目交会模型,实现弹目动态交会场景下推扫成像;构建迷彩涂层、沙漠等多目标双向反射分布函数(Bidirectional Reflectance Distribution Function,BRDF)散射模型,基于实验数据标定关键参数,有效降低BRDF平均误差;为实现对动态弹目交会场景的高效仿真,在前述动态扫描探测模型与多材质散射模型的基础上设计并行计算架构,通过采用图形处理器和包围盒层次结构结合方法,优化光线与场景面元相交判断逻辑,提高面元场景的仿真效率。新方法在不同地面背景下的回波功率仿真结果与BRDF背景关系一致,体现了模型的准确性。展开更多
This paper presents an improved test data compression scheme based on a combination of test data compatibility and dictionary for multi-scan designs to reduce test data volume and thus test cost. The proposed method i...This paper presents an improved test data compression scheme based on a combination of test data compatibility and dictionary for multi-scan designs to reduce test data volume and thus test cost. The proposed method includes two steps. First a drive bit matrix with less columns is generated by the compatibilities between the columns of the initial scan bit matrix, also the inverse compatibilities and the logic dependencies between the columns of mid bit matrixes. Secondly a dictionary bit matrix with limited rows is constructed, which has the properties that for each row of the drive bit matrix, a compatible row exists or can be generated by XOR operation of multiple rows in the dictionary bit matrix and the total number of rows used to compute all compatible rows is minimal. The rows in the dictionary matrix are encoded to further reduce the number of ATE channels and test data volume. Experimental results for the large ISCAS 89 benchmarks show that the proposed method significantly reduces test data volume for multi-scan designs.展开更多
文摘激光引信以体积小、分辨率高等优势,广泛应用于弹药领域,其动态探测能力决定毁伤效能。当前激光探测已经从单点探测转向线阵扫描开展,但仿真研究多限于单一场景,动态模拟能力和实时计算效率不足,为此提出动态扫描探测模型、多材质散射模型与高效并行计算方法,并基于此设计全链路激光线阵成像仿真系统。通过建立激光线阵推扫模型和弹目交会模型,实现弹目动态交会场景下推扫成像;构建迷彩涂层、沙漠等多目标双向反射分布函数(Bidirectional Reflectance Distribution Function,BRDF)散射模型,基于实验数据标定关键参数,有效降低BRDF平均误差;为实现对动态弹目交会场景的高效仿真,在前述动态扫描探测模型与多材质散射模型的基础上设计并行计算架构,通过采用图形处理器和包围盒层次结构结合方法,优化光线与场景面元相交判断逻辑,提高面元场景的仿真效率。新方法在不同地面背景下的回波功率仿真结果与BRDF背景关系一致,体现了模型的准确性。
基金the National Natural Science Foundation of China (Nos. 90207018 and 60576030)
文摘This paper presents an improved test data compression scheme based on a combination of test data compatibility and dictionary for multi-scan designs to reduce test data volume and thus test cost. The proposed method includes two steps. First a drive bit matrix with less columns is generated by the compatibilities between the columns of the initial scan bit matrix, also the inverse compatibilities and the logic dependencies between the columns of mid bit matrixes. Secondly a dictionary bit matrix with limited rows is constructed, which has the properties that for each row of the drive bit matrix, a compatible row exists or can be generated by XOR operation of multiple rows in the dictionary bit matrix and the total number of rows used to compute all compatible rows is minimal. The rows in the dictionary matrix are encoded to further reduce the number of ATE channels and test data volume. Experimental results for the large ISCAS 89 benchmarks show that the proposed method significantly reduces test data volume for multi-scan designs.
