UAV remote sensing as a digital aerial photography, not only has some basic photogrammetry features, but also has some other features. In this paper, aim at the characteristics of UAV remote sensing, begin with image ...UAV remote sensing as a digital aerial photography, not only has some basic photogrammetry features, but also has some other features. In this paper, aim at the characteristics of UAV remote sensing, begin with image data acquisition, the various parameter setting in the route planning were introduced, some of the principle was analyzed, the design of control points was described, and some of the considerations when laid control points were summarized.展开更多
针对启发式算法在无人机不规则复杂地形和多重威胁环境下进行三维航迹规划时,存在路径波动大和优化性能不足的问题,提出结合高程数据的凸包策略以及一种改进的樽海鞘群算法(ISSA)。首先,基于ASTER GDEMV3和Open Street Map数据,构建杭...针对启发式算法在无人机不规则复杂地形和多重威胁环境下进行三维航迹规划时,存在路径波动大和优化性能不足的问题,提出结合高程数据的凸包策略以及一种改进的樽海鞘群算法(ISSA)。首先,基于ASTER GDEMV3和Open Street Map数据,构建杭州某处山区和纽约城市区域的高程模型;其次,结合地形高程信息,采用凸包策略编码并通过B样条曲线构建路径;最后,对樽海鞘群算法在个体位置更新公式上加入自适应Alpha稳定分布策略与非线性扰动策略,以平衡算法的全局开发能力与局部探索能力,并引入贪婪策略和鱼类聚集装置策略,提高算法搜索效率和精度。利用CEC2020测试函数对所提算法进行实验对比,验证了改进算法的性能。实验结果表明,凸包策略能有效提升算法规划能力,且与传统算法相比,改进后的算法能够使无人机的寻优精度更高,代价函数更小。展开更多
During path planning, it is necessary to satisfy the requirements of multiple objectives. Multi-objective synthesis is based on the need of flight mission and subjectivity inclination of decision-maker. The decision-m...During path planning, it is necessary to satisfy the requirements of multiple objectives. Multi-objective synthesis is based on the need of flight mission and subjectivity inclination of decision-maker. The decision-maker, however, has illegibility for under- standing the requirements of multiple objectives and the subjectivity inclination. It is important to develop a reasonable cost performance index for describing the illegibility of the decision-maker in multi-objective path planning. Based on Voronoi dia- gram method for the path planning, this paper studies the synthesis method of the multi-objective cost performance index. Ac- cording to the application of the cost performance index to the path planning based on Voronoi diagram method, this paper ana- lyzes the cost performance index which has been referred to at present. The analysis shows the insufficiency of the cost per- formance index at present, i.e., it is difficult to synthesize sub-objective flmctions because of the great disparity of the sub-objective fimctions. Thus, a new approach is developed to optimize the cost performance index with the multi-objective fuzzy optimization strategy, and an improved performance index is established, which could coordinate the weight conflict of the sub-objective functions. Finally, the experimental result shows the effectiveness of the proposed approach.展开更多
This paper proposes the architecture of an intelligent flight launcher system as well as fundamental solutions to capability prediction and dynamic planning. This effort reflects the latest progress in the application...This paper proposes the architecture of an intelligent flight launcher system as well as fundamental solutions to capability prediction and dynamic planning. This effort reflects the latest progress in the applications of intelligent and autonomous technology for launcher flights. The paper first describes the characteristics and capabilities of intelligent and autonomous systems and classifies various related technologies. In the context of intelligent and autonomous technology in aerospace engineering, it then focuses on technical difficulties involved with intelligent flight and reviews developments in the field. An E^3 classification model of an intelligent flight launcher is then proposed and its application scenarios are discussed. Based on an intelligent flight system configuration of the launcher, the online trajectory planning and initial value guess are examined, and vertical landing is provided as an example to explain the effects of the implementation of computational intelligence to flight systems.展开更多
文摘UAV remote sensing as a digital aerial photography, not only has some basic photogrammetry features, but also has some other features. In this paper, aim at the characteristics of UAV remote sensing, begin with image data acquisition, the various parameter setting in the route planning were introduced, some of the principle was analyzed, the design of control points was described, and some of the considerations when laid control points were summarized.
文摘针对启发式算法在无人机不规则复杂地形和多重威胁环境下进行三维航迹规划时,存在路径波动大和优化性能不足的问题,提出结合高程数据的凸包策略以及一种改进的樽海鞘群算法(ISSA)。首先,基于ASTER GDEMV3和Open Street Map数据,构建杭州某处山区和纽约城市区域的高程模型;其次,结合地形高程信息,采用凸包策略编码并通过B样条曲线构建路径;最后,对樽海鞘群算法在个体位置更新公式上加入自适应Alpha稳定分布策略与非线性扰动策略,以平衡算法的全局开发能力与局部探索能力,并引入贪婪策略和鱼类聚集装置策略,提高算法搜索效率和精度。利用CEC2020测试函数对所提算法进行实验对比,验证了改进算法的性能。实验结果表明,凸包策略能有效提升算法规划能力,且与传统算法相比,改进后的算法能够使无人机的寻优精度更高,代价函数更小。
文摘During path planning, it is necessary to satisfy the requirements of multiple objectives. Multi-objective synthesis is based on the need of flight mission and subjectivity inclination of decision-maker. The decision-maker, however, has illegibility for under- standing the requirements of multiple objectives and the subjectivity inclination. It is important to develop a reasonable cost performance index for describing the illegibility of the decision-maker in multi-objective path planning. Based on Voronoi dia- gram method for the path planning, this paper studies the synthesis method of the multi-objective cost performance index. Ac- cording to the application of the cost performance index to the path planning based on Voronoi diagram method, this paper ana- lyzes the cost performance index which has been referred to at present. The analysis shows the insufficiency of the cost per- formance index at present, i.e., it is difficult to synthesize sub-objective flmctions because of the great disparity of the sub-objective fimctions. Thus, a new approach is developed to optimize the cost performance index with the multi-objective fuzzy optimization strategy, and an improved performance index is established, which could coordinate the weight conflict of the sub-objective functions. Finally, the experimental result shows the effectiveness of the proposed approach.
文摘This paper proposes the architecture of an intelligent flight launcher system as well as fundamental solutions to capability prediction and dynamic planning. This effort reflects the latest progress in the applications of intelligent and autonomous technology for launcher flights. The paper first describes the characteristics and capabilities of intelligent and autonomous systems and classifies various related technologies. In the context of intelligent and autonomous technology in aerospace engineering, it then focuses on technical difficulties involved with intelligent flight and reviews developments in the field. An E^3 classification model of an intelligent flight launcher is then proposed and its application scenarios are discussed. Based on an intelligent flight system configuration of the launcher, the online trajectory planning and initial value guess are examined, and vertical landing is provided as an example to explain the effects of the implementation of computational intelligence to flight systems.
