共查询到18条相似文献,搜索用时 216 毫秒
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《机械传动》2016,(9):91-94
设计了一种具有良好稳定性和越障能力的少驱动六足机器人。对少驱动六足机器人的整体结构以及行走步态进行了分析,在此基础上建立了机器人足端点轨迹方程,得到了机器人行走和越障时足端点的运动要求。以六足机器人运动平稳性为目标函数,综合考虑杆长条件、传动性能、几何结构、越障条件和边界条件五类约束,建立了机器人足端轨迹优化模型。利用MATLAB优化工具箱的约束非线性函数fmincon对影响少驱动六足机器人足端轨迹曲线的参数进行优化,得到了满足运动特性要求的机器人腿部机构尺寸。通过对优化后得到的足端轨迹的分析,证明了少驱动六足机器人腿部机构的合理性,为后续六足机器人的研究与开发奠定了基础。 相似文献
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从柔性多体动力学对机械臂结构影响出发,分析了基于柔性多体动力学的机械臂结构优化设计方式,旨在为柔性多体动力学在机械臂结构优化设计中的应用奠定技术基础,以此提高机械臂整体动力学性能,进而提高机器人载重、自重比和末端操作精度,提升机械臂应用效果和技术含量。 相似文献
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Mingxuan Liang Binrui Wang Tianhong Yan 《Journal of Mechanical Science and Technology》2017,31(8):3747-3754
This paper examines the effect mechanism of torsional stiffness on flexible joints and the dynamic optimization of a six Degree-of-freedom industrial robot arm. The design optimization of the robot arm is investigated based on the rotor-torsional spring model and finite element method. The flexible multi-body dynamic model of the robot arm are established by considering the flexible characteristics of arms and joints, and the natural frequencies of a robot arm are calculated to obtain the torsional stiffness of the flexible joints. Natural frequency results gradually increased with joint stiffness improvement. Using the established dynamic model, the topology optimization on the robot arm is carried out by regarding lightweight as design goal and total displacement as constraints. The tare-load ratio and dynamic performance of the optimized robot arm are significantly enhanced compared with the original design model. This research can provide the theoretical basis for the dynamic optimization and upgrade of lightweight robot arm. 相似文献
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针对人工方式进行核电管道检测与维护存在效率低的问题,将管道机器人技术应用到核电站管道维护中,代替人工进行现场故障监测、异物探测和清理。设计了直径为300 mm的管道机器人的机械结构,分析了机器人在管道中的受力情况以及驱动特性。同时设计了一种全新的单电机全驱动机构,这种设计使机器人整体结构更为紧凑,提高了机器人行进速度以及驱动负载能力。并利用ADAMS动力学仿真软件对机器人驱动特性进行了研究和分析。结果表明,机器人的驱动能力能够满足实际作业需求,并且其驱动能力与摩擦系数、斜坡度有关;其中驱动力与摩擦系数成正比,即摩擦系数越大机器人的驱动力越大;驱动力与斜坡度成反比,即斜坡度越大驱动力越小。该研究结果可为后续机器人优化设计提供理论依据。 相似文献
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The problems related to self-collision detection and optimal collision-free trajectory planning for a robot arm subjected
to dynamic constraints is investigated. First, a computed-torque method is used to obtain a linearized closed-loop system.
For this linearized system, the reference state that the robot arm is capable of reaching is verified through phase plane
analysis. This will ensure that the robot arm can be stopped before self-collision occurs. Dynamic constraints are taken into
account for a continuous motion of deceleration by calculating the bounds of the commanded force/torques with interval evaluations.
When the reference state e at t+δt is not valid for selfcollision avoidance, a new feasible state is determined by adhering to an interval-based method which
allows decomposition of a complex constrained optimization problem into a simple two-stage optimization problem with relaxed
constraints. The optimized feasible state not only secures the robot arm against self-collision but also allows the robot
arm to track the original reference trajectory closely. Simulation and experimental results of a 2-dof robot arm show the
effectiveness of the proposed interval-based approach. 相似文献
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考虑振动抑制的多冗余度特种操作机器人轨迹优化方法 总被引:1,自引:0,他引:1
为了实现复杂曲管内曲面的自动化喷涂作业,设计多自由度的冗余度特种操作机器人。而多冗余度机器人系统刚度低,使得机器人在喷涂作业过程中出现振动,末端轨迹跟踪误差加大,降低了涂层质量。为此,通过分析冗余度机器人带有弹性变形影响的动力学方程,提出一种利用冗余自由度对机器人关节空间作业轨迹进行优化的新方法,实现了机器人在作业过程中的振动抑制,并且满足复杂三维工作空间约束。在试验中应用此方法,机器人在运动过程中既满足复杂的工作约束,同时减少了末端的振动,实现了振动抑制,证明了该优化方法的有效性。 相似文献
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本文提出衡量机器动态品质的高速性能指标、加速性能指标和综合性能指标。以此评定机器人的结构合理性、参数优化程度。基于这些指标的优化设计考虑到机器人全局最坏情况,能够达到总体最优。计算结果表明,按所述指标进行优化,可使关节相对驱动力矩趋于均匀,最大力矩显著下降,加速性能和高速性能改善,其结果优于其它方法。 相似文献
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