共查询到20条相似文献,搜索用时 250 毫秒
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《现代制造技术与装备》2021,(7)
介绍了一种用于水下无人航行器研制和试验阶段内部软件系统联合调试的手段,通过Unity3D构建水下三维仿真海洋环境,建立无人航行器水下运动和动力学模型,并对航行器搭载的传感器和执行器进行数学建模,组建水下三维仿真系统。它与实际航行器软件系统通过与实物一致的接口相连,组成了一个数据传输环流系统,可进行航行器自主航行仿真测试。 相似文献
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《机械工程学报》2017,(4)
针对深海海底观测网技术发展的需求,将深海移动平台的动态、大范围观测与网络节点的静态、长期观测相结合,形成一个长期、实时的海洋环境立体观测网络,设计一种具有两个摆动自由度的水下接驳站,介绍其主体结构设计,并建立水下接驳站的拉格朗日动力学方程,分析调节重块对受到干扰后的接驳站恢复稳态的快速性的影响,同时进行仿真验证,并制作等比例缩放的接驳站样机模型进行水池试验。仿真和试验结果均表明,两自由度的水下接驳站的结构方案是可行的,可以适应不平地势、降低安装难度,并且增大调节重块的质量将有效增强接驳站的抗干扰性,减小接驳站受到干扰后偏离平衡位置的角度,加快接驳站受到干扰后的恢复到稳态的速度。 相似文献
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水下航行器光学隐蔽深度测量系统 总被引:1,自引:0,他引:1
为了实现对水下航行器光学隐蔽深度的实时测量,研制了水下航行器光学隐蔽深度测量系统。根据目标背景对比度的传输理论,分析了目标背景对比度在海水、大气、海面的传输特性,建立了水下航行器光学隐蔽深度模型。基于该模型分析了测量水下航行器光学隐蔽深度所需要的参数,设计了测量海水上行辐照度、海水下行辐照度、海水体衰减性系数、海水漫衰减性系数和水下航行器表面反射率的测量方法,并完成一次海上试验。试验测得良好天气情况下特征尺度为12m的水下航行器的光学隐蔽深度为25~35m。试验结果表明,设计的测量系统可以实现对水下航行器光学隐蔽深度测量,并适用于各类潜艇。由于改变了传统的在水面进行深度测量的方式,该系统工作稳定可靠,提高了隐蔽性和对海域测量的准度,可为水下作战决策提供帮助。 相似文献
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杨涛 《现代制造技术与装备》2021,(6):22-25
在海洋观测、海底资源开发以及水下勘察等水下作业中,自主水下航行器(Autonomous Underwater Vehicle,AUV)已经成为不可或缺的装备.航位推算是AUV在水下自主航行的关键技术.因此,介绍AUV的结构组成、硬件控制系统以及软件控制系统等,重点介绍了一种AUV自主导航的航位推算算法以及最后的湖试实验... 相似文献
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分析了水下对接系统的原理和结构,阐述了对接系统的控制方法和通信方法,给出了控制过程中所涉及的通信方案。整个对接系统由水下机械手部分及对接台部分组成,并由对接操作杆完成对接作业。在Windows环境下,基于VC + + 6. 0实现了上位机与对接操作杆的串行口通信,基于S7-200 PLC自由口通信模式实现了上位机与PLC的通信,从而可以通过对接操作杆对机械手和对接台进行实时控制,给出了通讯协议和软件设计方法。系统的控制方法简单易行,人机互动灵活,稳定性好,实时性强,能快速方便的实现水下对接。 相似文献
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One possible variant of solving the problem of guidance of an autonomous unmanned underwater vehicle to a given target is considered. At large distances, navigation is based on measuring the time of propagation of acoustic signals. Short-range positioning is ensured by processing images taken by an optical camera. PID control is applied as an algorithm controlling the vehicle position and attitude in space. The proposed algorithm is implemented as a computer code and tested in a series of numerical experiments. 相似文献
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The capability of docking, refueling, repairing, and updating microsatellites using automatic autonomous vehicles will be of significance critical value for design and operation of several space systems in the near feature. Automatic docking capability was successfully tested by many institutions such as National Space Development Agency in Japan, European Space Agency, National Aeronautics and Space Administration in USA, etc. However, there is still much more space for improvement of degree of automation during the process of docking with large deviations of the initial attitude. A novel automatic autonomous probe-cone docking mechanism used for microsatellite docking is proposed. This docking mechanism is designed according to the design indices such as miniaturization, degree of automation and automatic capture capability within large deviation of the initial attitude. On the basis of the virtual work principle, the dynamics modeling of the docking process is presented. The position of the contact point is then analyzed. Comprehensive system level simulation is conducted in the 13 kinds of typical operating conditions with the initial deviations. Capture performance is analyzed. The simulation results show that the docking mechanism can be smoothly captured within 2 s in all cases of large attitude deviation between the active and passive spacecrafts. A virtual prototype model of the docking mechanism is established through ADAMS for further verifying the correctness of the buffer parameter model and the autonomous docking capability. A laboratory platform is designed for on-the-ground experimental validation of the property of mini probe-cone docking mechanism. Repeated docking tests prove the proposed design of the mini probe-cone docking mechanism system for its high reliability, and automatic capture capability within large attitude range. The kinetic model of the docking capture process and the mechanism structure could provide some References for similar mechanism design of in-orbit spacecraft. 相似文献
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为了提高智能轮椅床系统对接的自主性,提出了一种基于视觉测量的自动对接架构。轮椅床对接过程分为远程导引阶段和近程对接阶段。在远程导引阶段,室内天花板视觉系统采集并识别轮椅上的新型人工标志,利用卡尔曼滤波(KF)的跟踪检测路标特征,继而采用P3P的视觉定位方法确定路标与相机的相对位姿,根据轮椅坐标系与远程阶段的世界坐标系的变换关系确定轮椅的姿态。在近程对接阶段,车载单目视觉系统采集对接目标的引导标志,利用引导标志的角点估计轮椅与床的相对位姿,最后根据实时的视觉反馈实现床椅的自动对接。多次实验结果表明所提出的视觉对接方法具有可行性和有效性。 相似文献
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This paper presents a two-stage cooperative path planner for multiple autonomous underwater vehicles operating in dynamic environment. In case of static environment, global Legendre pseudospectral method is employed for collision-free paths of vehicles for the purpose of minimum time consumption and simultaneous arrival. Moreover, in order to keep the multiple autonomous underwater vehicles safe from collisions on the path segments connecting two adjacent control nodes, an adaptive intermediate knots insertion algorithm is introduced. In the on-line planning stage, the local re-planning strategy aims at avoiding collisions with unexpected dynamic obstacles by two consecutive avoidance maneuvers, and the differential flatness property of autonomous underwater vehicle is utilized, which can help the vehicles react fast enough to avoid moving obstacles. 相似文献
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基于关节限位的自治水下机器人机械手系统运动规划研究 总被引:1,自引:1,他引:0
对自治水下机器人搭载的四功能水下电动机械手进行了简要描述.考虑到自治水下机器人机械手系统的运动学冗余,将关节限位算法用于系统逆运动学求解,避免载体大幅度姿态变化.利用Matlab仿真表明该算法在解决系统冗余的同时有效的限制了关节位移. 相似文献
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运用螺旋理论对于一种空间弱撞击对接机构进行传递功率分析,通过求解运动螺旋与力螺旋的互易积,来获知系统的传递功率,得出传递功率与空间弱撞击对接机构本身构型参数、对接环当前位姿信息及速度信息直接相关的结论。考虑到在不同尺寸构型、速度信息下的空间弱撞击对接机构的传递功率是不一样的,不能单纯通过传递功率来评价系统的优劣,因此提出瞬时能效功率比的概念,用以评价某一构型下空间弱撞击对接机构的传递效能,结合具体的算例对瞬时能效功率比进行求解,研究内容与结果为新一代的空间对接机构的性能指标参数优化提供了理论基础。 相似文献