共查询到20条相似文献,搜索用时 93 毫秒
1.
在实际应用中航迹规划着重考虑的是规划出的航迹应具有良好的可靠性能,针对多UAV协同航迹规划有多个约束条件且环境复杂、规划耗时长等问题,使用智能算法解决多UAV协同航迹规划问题无法确保规划航迹的可靠性能。因此,提出了一种启发式SAS算法,用以解决此问题。仿真结果证明,使用该算法规划出的航迹具有较高的可靠性。 相似文献
2.
3.
4.
5.
动态自适应快速扩展树航迹规划算法研究 总被引:1,自引:0,他引:1
快速扩展随机树(RRT)是航迹规划的重要算法,针对其难以直接应用于无人机航迹规划的问题,提出了动态自适应RRT算法.动态自适应RRT算法在随机点产生过程中加入无人机转弯角约束,使航迹更适合无人机直接跟踪;同时引入动态调节因子,根据环境中障碍密集程度调整规划步长,有效避免各类障碍.计算机实验结果表明动态自适应RRT算法在单航迹规划和多航迹规划中明显优于基本RRT算法和其它改进RRT算法,更适用于无人机航迹规划. 相似文献
6.
7.
《电光与控制》2017,(1)
针对无人机飞行任务规划系统中的航迹规划问题,提出了一种改进的人工蜂群算法,将其应用于无人机的航迹规划。该算法将航迹规划问题转换成函数优化问题,以蜂群为搜索单位,通过群体之间的信息交流与优胜劣汰机制,使蜂群向更优方向进化。在雇佣蜂搜索阶段采用自适应搜索策略来加快算法收敛速度;在跟随蜂搜索阶段引入一种新的概率选择方式来保证种群的多样性;在侦察蜂搜索阶段利用混沌搜索算子提高算法的全局搜索能力。通过标准函数测试与航迹规划仿真对改进后的算法进行验证,结果表明,改进后的算法提高了全局收敛能力,在收敛速度和精度上优于传统的人工蜂群算法,可有效解决无人机的航迹规划问题。 相似文献
8.
《电光与控制》2017,(11)
针对无人机遇到突发威胁动态航迹规划问题,提出了一种基于多策略SSO和改进A*算法的无人机动态航迹规划方法。该方法将无人机航迹规划划分为静态航迹规划和突发威胁实时规避两个阶段:首先,对于静态航迹规划阶段,采用多策略SSO优化算法对极坐标航迹规划模型进行求解,通过引入完全弹性碰撞、自适应跳跃等机制,在有效满足飞行性能约束的同时,提高了航迹规划结果的可行性;其次,对于突发威胁实时规避阶段,采用改进A*算法对局部区域进行航迹重规划,通过拓展A*算法搜索邻域个数和引入最小"弯折"估计代价函数,在保证实时性要求的同时,能够规划出更加平滑的最优航迹。仿真结果表明,提出的方法能够有效地给出更为满意的无人机动态航迹规划路线。 相似文献
9.
10.
11.
本文对近期区分服务MPLS流量工程相关框架进行了研究,在此基础上提出一个新的框架结构。增加了新的模块包括资源能力计划、能力需求调度排期和路由路径管理模块,并提出平行路径资源调度新算法,模拟分析显示可以有效实现流量工程更高程度规划管理,增强了网络规划流量工程方面的性能。 相似文献
12.
Rodrigo F. de Mello José A. Andrade Filho Luciano J. Senger Laurence T. Yang 《Telecommunication Systems》2008,38(3-4):147-160
In 2006 the Route load balancing algorithm was proposed and compared to other techniques aiming at optimizing the process allocation in grid environments. This algorithm schedules tasks of parallel applications considering computer neighborhoods (where the distance is defined by the network latency). Route presents good results for large environments, although there are cases where neighbors do not have an enough computational capacity nor communication system capable of serving the application. In those situations the Route migrates tasks until they stabilize in a grid area with enough resources. This migration may take long time what reduces the overall performance. In order to improve such stabilization time, this paper proposes RouteGA (Route with Genetic Algorithm support) which considers historical information on parallel application behavior and also the computer capacities and load to optimize the scheduling. This information is extracted by using monitors and summarized in a knowledge base used to quantify the occupation of tasks. Afterwards, such information is used to parameterize a genetic algorithm responsible for optimizing the task allocation. Results confirm that RouteGA outperforms the load balancing carried out by the original Route, which had previously outperformed others scheduling algorithms from literature. 相似文献
13.
Shuo Ding 《Wireless Communications and Mobile Computing》2010,10(11):1391-1408
The integration of the Mobile Ad Hoc Networks (MANETs) into 4G systems will help to increase the networking flexibility and coverage of existing infrastructure networks. One of the crucial challenges is modifying existing reactive ad hoc routing protocols to support external routing operations. This paper contributes thorough protocol extensions for connecting DSR‐based MANETs with the Internet (DSR‐IE). DSR routing protocol is extended to effectively support External Route Discovery and External Route Maintenance functions. In particular, a novel External Route Discovery scheme, Comprehensive External Route Judgment, (CERJ) is proposed. Mobile IP is utilized to manage seamless data services. Finally, OPNET simulation models are developed to demonstrate the implementability and effectiveness of the proposed schemes. Copyright © 2009 John Wiley & Sons, Ltd. 相似文献
14.
纵观现有P2P流媒体技术,伙伴节点(Peer)的分配都采用随机策略,而忽略了伙伴节点之间的距离远近和通信连接状况,从而导致网络的总体传输能力下降。论文针对上述问题,提出了追踪路由的算法发现并分配伙伴节点,提高节点间的带宽利用率和数据共享能力。同时还对追踪路由算法建立数学模型,对其仿真进行了分析,收到良好效果。 相似文献
15.
16.
在实际应用中,以IP网为基础的通用多协议标签交换(GMPLS)控制平面的可靠性尚不能满足自动交换光网络(ASON)电信级的要求,针对这一情况,文章主要探讨了GMPLS信令RSVP-TE的扩展,为建立保护光通道实现路由排除功能,对排除路由对象(XRO,Exclude Route Object)和显示排除路由对象(EXRS,Explicit Exclude Route Subobject)两个对象进行了扩展。 相似文献
17.
18.
19.
文章首先基于SWE详细分析了传感规划服务应完成的核心操作,然后重点阐述了基于SWE的传感规划服务原型系统的设计,包括系统的数据交互和系统体系结构的设计。并详细阐述了每一层设计的实现,最后基于一个红外楼宇监控无线传感器网络实现了SPS原型系统,并进行了试验,实验结果表明该原型系统中实现的SPS的核心操作能够较好地为用户请求任务提供规划服务。 相似文献
20.
Group communication applications in Mobile Ad hoc NETworks (MANETs) require stringent bounds on Quality of Service (QoS) parameters. In this paper, we propose an agent driven QoS mesh based multicast routing scheme in MANET that satisfies the user requirements with good reasoning by using adaptive neuro-fuzzy inference system (ANFIS). Four types of agents are used in the scheme: Multicast administer, ANFIS, Route inventing and Guard agents. The proposed scheme operates in following steps. (1) ANFIS agent at the source node optimizes membership functions of QoS parameters according to the user QoS requirement. It also computes QoS factor for different combinations of parameter values from optimized membership functions. (2) Route inventing mobile agent carries the QoS requirement, set of parameter values and their corresponding QoS factors to reach multicast receivers through intermediate nodes by using selective flooding and agent cloning. Multicast administer agent (MAA) at the intermediate node decides its QoS satisfiability. (3) Route inventing mobile agents trace back the traversed path by marking QoS nodes. They facilitate MAA at the source node to construct QoS mesh between source and destinations. (4) MAA at the source node selects a shortest path to reach each of the multicast receivers from the constructed QoS mesh, and (5) Guard mobile agent is employed for the link/node failures and management of the group. Our proposed scheme performs better than fuzzy based, and autonomic QoS multicast routing schemes. 相似文献