Salvo attacking a surface target by multiple missiles is an effective tactic to enhance the lethality and penetrate the defense system. However, existing cooperative guidance laws in the midcourse or terminal course a...Salvo attacking a surface target by multiple missiles is an effective tactic to enhance the lethality and penetrate the defense system. However, existing cooperative guidance laws in the midcourse or terminal course are not suitable for long-and medium-range missiles or stand-off attacking. Because the initial conditions of cooperative terminal guidance that are generally generated from the mid-course flight may not lead to a successful cooperative terminal guidance without proper mid-course flight adjustment. Meanwhile, cooperative guidance in the mid-course cannot solely guarantee the accuracy of a simultaneous arrival of multiple missiles. Therefore, a joint mid-course and terminal course cooperative guidance law is developed. By building a distinct leader-follower framework, this paper proposes an efficient coordinated Dubins path planning method to synchronize the arrival time of all engaged missiles in the mid-course flight. The planned flight can generate proper initial conditions for cooperative terminal guidance, and also benefit an earliest simultaneous arrival. In the terminal course, an existing cooperative proportional navigation guidance law guides all the engaged missiles to arrive at a target accurately and simultaneously.The integrated guidance law for an intuitive application is summarized. Simulations demonstrate that the proposed method can generate fast and accurate salvo attack.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
无人机的自主飞行是无人机相关研究的重点方向,如何在复杂环境中快速分析环境,并规划一条安全可行的路径,是该方向的研究目标。针对传统路径搜索算法存在的路径不平滑问题,采用三阶B样条曲线进行预规划航迹。在欧式有符号距离函数(Eucli...无人机的自主飞行是无人机相关研究的重点方向,如何在复杂环境中快速分析环境,并规划一条安全可行的路径,是该方向的研究目标。针对传统路径搜索算法存在的路径不平滑问题,采用三阶B样条曲线进行预规划航迹。在欧式有符号距离函数(Euclidean Signed Distance Functions, ESDF)地图提供的梯度信息的基础上,分别在平滑、碰撞和可行性上设计约束方程,实现轨迹动态重规划。针对路径动态更新中,时间间隔变化产生的控制点不再符合约束的问题,采用各向异性曲线拟合方法,实现时间再分配,保障在动态更新路径的过程中,新产生的路径与原路径相似且具有同样的可行性。实验证明,该算法实现了无人机的自主路径规划与优化,能够进行动态避障,面对复杂环境具有鲁棒性。展开更多
基金supported by the National Natural Science Foundation of China (No.61304215)supported by the Beijing Education Committee Cooperation Building Foundation Project (CSYS100070417)
文摘Salvo attacking a surface target by multiple missiles is an effective tactic to enhance the lethality and penetrate the defense system. However, existing cooperative guidance laws in the midcourse or terminal course are not suitable for long-and medium-range missiles or stand-off attacking. Because the initial conditions of cooperative terminal guidance that are generally generated from the mid-course flight may not lead to a successful cooperative terminal guidance without proper mid-course flight adjustment. Meanwhile, cooperative guidance in the mid-course cannot solely guarantee the accuracy of a simultaneous arrival of multiple missiles. Therefore, a joint mid-course and terminal course cooperative guidance law is developed. By building a distinct leader-follower framework, this paper proposes an efficient coordinated Dubins path planning method to synchronize the arrival time of all engaged missiles in the mid-course flight. The planned flight can generate proper initial conditions for cooperative terminal guidance, and also benefit an earliest simultaneous arrival. In the terminal course, an existing cooperative proportional navigation guidance law guides all the engaged missiles to arrive at a target accurately and simultaneously.The integrated guidance law for an intuitive application is summarized. Simulations demonstrate that the proposed method can generate fast and accurate salvo attack.
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.
文摘无人机的自主飞行是无人机相关研究的重点方向,如何在复杂环境中快速分析环境,并规划一条安全可行的路径,是该方向的研究目标。针对传统路径搜索算法存在的路径不平滑问题,采用三阶B样条曲线进行预规划航迹。在欧式有符号距离函数(Euclidean Signed Distance Functions, ESDF)地图提供的梯度信息的基础上,分别在平滑、碰撞和可行性上设计约束方程,实现轨迹动态重规划。针对路径动态更新中,时间间隔变化产生的控制点不再符合约束的问题,采用各向异性曲线拟合方法,实现时间再分配,保障在动态更新路径的过程中,新产生的路径与原路径相似且具有同样的可行性。实验证明,该算法实现了无人机的自主路径规划与优化,能够进行动态避障,面对复杂环境具有鲁棒性。
