Head-Raising of Snake Robots Based on a Predefined Spiral Curve Method

Head-Raising of Snake Robots Based on a Predefined Spiral Curve Method
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基于预定义螺旋曲线法的蛇形机器人抬起头

DOI:
10.3390/app8112011
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发表时间:
2018-10
影响因子:
2.7
通讯作者:
Yang Chenguang
Yang Chenguang
中科院分区:
综合性期刊4区
文献类型:
--
作者:
Zhang Xiaobo;Liu Jinguo;Ju Zhaojie;Yang Chenguang

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蛇机器人必须抬起头来获得广阔的视觉空间,才能规划复杂的任务,如检查未知环境,跟踪飞行物体,以及利用其抬起部分充当机械手。然而,目前只有少数研究人员专注于分析蛇机器人的抬头动作。因此,针对这类机器人的抬头运动,提出了一种预定义的螺旋线方法。首先,设计了预定义缓和曲线的表达式。其次,利用蛇形机器人的曲线和线段模型,提出了一种用于约束机器人宏观形状的形状拟合算法。第三,建立机器人线段模型的坐标系。然后,开发了相移和角度求解算法,获得了抬头运动过程中的横摇、俯仰和偏航角度序列。最后,利用角度序列对抬头运动进行了仿真,验证了该方法的可行性。
A snake robot has to raise its head to acquire a wide visual space for planning complex tasks such as inspecting unknown environments, tracking a flying object and acting as a manipulator with its raising part. However, only a few researchers currently focus on analyzing the head-raising motion of snake robots. Thus, a predefined spiral curve method is proposed for the head-raising motion of such robots. First, the expression of the predefined spiral curve is designed. Second, with the curve and a line segments model of a snake robot, a shape-fitting algorithm is developed for constraining the robot’s macro shape. Third, the coordinate system of the line segments model of the robot is established. Then, phase-shifting and angle-solving algorithms are developed to obtain the angle sequences of roll, pitch, and yaw during the head-raising motion. Finally, the head-raising motion is simulated using the angle sequences to validate the feasibility of this method.
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