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| 1 | Dynamic Bending of Bionic Flexible Body Driven by Pneumatic Artificial Muscles(PAMs) for Spinning Gait of Quadruped Robot显示文摘The body of quadruped robot is generally developed with the rigid structure. The mobility of quadruped robot depends on the mechanical properties of the body mechanism. It is difficult for quadruped robot with rigid structure to achieve better mobility walking or running in the unstructured environment. A kind of bionic flexible body mechanism for quadruped robot is proposed, which is composed of one bionic spine and four pneumatic artificial muscles(PAMs). This kind of body imitates the four-legged creatures' kinematical structure and physical properties, which has the characteristic of changeable stiffness, lightweight, flexible and better bionics. The kinematics of body bending is derived, and the coordinated movement between the flexible body and legs is analyzed. The relationship between the body bending angle and the PAM length is obtained. The dynamics of the body bending is derived by the floating coordinate method and Lagrangian method, and the driving force of PAM is determined. The experiment of body bending is conducted, and the dynamic bending characteristic of bionic flexible body is evaluated. Experimental results show that the bending angle of the bionic flexible body can reach 18°. An innovation body mechanism for quadruped robot is proposed, which has the characteristic of flexibility and achieve bending by changing gas pressure of PAMs. The coordinated movement of the body and legs can achieve spinning gait in order to improve the mobility of quadruped robot. | LEI Jingtao YU Huangying WANG Tianmiao | 2016 | Chinese Journal of Mechanical Engineering2016，29，1： | 21 |
| 2 | 四足机器人跳跃步态控制方法显示文摘针对四足机器人的奔跑控制问题,提出一种基于跳跃(Bound)步态的奔跑控制方法,通过腿部的快速小幅度摆动实现四足机器人的Bound步态。使用有限状态机将机器人的一个运动周期分为6个阶段,其中前腿与后腿各3个阶段,触地缓冲阶段采用竖直弹簧阻尼模型,蹬地阶段使用虚拟模型调整腿部对地推力方向,摆动相使用贝赛尔曲线规划足端轨迹。通过在动力学仿真软件中构建与液压驱动四足机器人SCalf-II同尺寸、同质量的虚拟样机对所提出的方法进行仿真验证与测试,结果表明机器人在5个周期后形成了有较强周期性的Bound步态,前进方向速度波动较小,各关节运动范围、速度、力矩均在SCalf-II设计指标之内,从而验证了该方法的正确性和有效性。 | 孟健 李贻斌 李彬 | 2015 | 山东大学学报(工学版)2015，45，3： | 10 |
| 3 | 基于动量控制的猎豹机器人疾驰步态分析显示文摘从运动节律和足部地面接触的逻辑关系出发,解析了猎豹机器人疾驰步态周期相序,分析了疾驰步态运动构件的运动节律。依此建立了以仿生猎豹前后质心的高度波动为特征的控制方法,其核心在于控制驱动相期间的动量特性。基于足部轨迹的多目标控制策略,建立了疾驰步态在驱动相的足部轨迹、前后质心速度和角速度的动力学控制模型。最后综合运动节律控制策略、腿部足部轨迹控制策略和躯干控制策略等,在Simulink/RecurDyn联合仿真实验中实现了猎豹机器人疾驰步态的完整周期过程。 | 徐蔚青 陶志远 王石刚 梁庆华 | 2018 | 机械设计与研究2018，34，2： | 3 |
| 4 | Mechanism of Spine Motion About Contact Time in Quadruped Running显示文摘The current research of quadruped robot focuses on the quadruped robot with spine motion. Contact time is a very important part of system performance. However, the mechanism of spine motion about contact time has not been clearly elucidated. In this paper, the e ect of spine motion on contact time is studied deeply from dynamic view.Firstly, a simplified model of the quadruped robot with spine joint is set up, its dynamic equations are derivated, and a method that can generate passive periodic locomotion is proposed. Secondly, according to the vertical spring oscillator model, the two-dimension planar locomotion of the simplified model is regarded as a special vibration in the vertical direction, and the approximate formula of calculating contact time is obtained. Finally, the approximate formula of calculating contact time is verified by the simulation results of passive periodic locomotion, and the e ect of spine motion on contact time is deeply discussed based on the approximate formula of calculating contact time. The discussion proves that spine motion indeed has little e ect on contact time, but spine motion can slightly reduce body pith movement and regulate the leg sti ness in leg contact phase. This research proposes an e ective research method which can be used to study the motion mechanism of the quadruped robot with spine motion,and the mechanism of spine motion about contact time is clearly elucidated which is helpful to set the parameters of mechanical structure and study control algorithm about the quadruped robot with spine motion. | Qi Liu Yannian Bao Wei Yu Jianming Zhang Chao Li Xinru Xie | 2019 | Chinese Journal of Mechanical Engineering2019，32，2： | 0 |
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