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1.
新型蛇形机器人蜿蜒运动的动力学分析   总被引:3,自引:0,他引:3  
叶长龙  马书根  李斌  王越超  井涛 《机器人》2005,27(6):555-560
为提高蛇形机器人执行各种运动的能力,研制了新型蛇形机器人系统.重点研究了该蛇形机器人的动力学.建立了机器人的运动学模型,并根据运动学模型提出了控制蛇形机器人蜿蜒运动的复合运动控制方法.用拉格朗日方法建立动力学模型,对不同参数下蛇形机器人的关节力矩特性和摩擦力特性进行了分析比较,为蛇形机器人的有效运动提供了理论依据.  相似文献   

2.
仿蛇变体机器人运动机理研究   总被引:2,自引:1,他引:2  
刘华  颜国正  丁国清 《机器人》2002,24(2):154-158
本文设计了一种蛇形机器人,分析了蛇形机器人的结构,详细讨论了蛇形机器人的运 动机理和几何结构关系,并推导出蛇形机器人的控制算法和相应的控制程序,蛇形机器人在 程序控制下能够向前、向后运动,在一定程度上实现了蛇的运动.  相似文献   

3.
李斌  卢振利 《机器人》2005,27(1):14-19
根据生物蛇和蛇形机器人的结构及运动特点,提出了基于乐理的蛇形机器人控制方法,定义了乐理的符号、规则与蛇形机器人控制过程的对应关系,编写了蜿蜒运动步态谱.“勘查者—I”蛇形机器人上实现了蜿蜒运动的控制. 给出了今后的研究方向.  相似文献   

4.
一种基于空间连杆机构的蛇形机器人   总被引:2,自引:0,他引:2  
赵铁石  林永光  缪磊  王春雨 《机器人》2006,28(6):629-635
提出了一种基于空间连杆机构的蛇形机器人模型.该蛇形机器人各骨节间通过万向铰链连接,每节安装两个微型伺服电机,电机带动曲柄转动,曲柄经两端为球铰的连杆驱动另一骨节运动.通过两个电机的耦合驱动,该蛇形机器人能实现蜿蜒爬行、转向、抬头等多种运动方式.文中给出了该空间连杆机构的运动学解,基于Serpenoid曲线计算得到了实际控制所需的关节转角和步数,并编程实现了上述运动方式.  相似文献   

5.
针对蛇形机器人采用的循环抑制CPG模型,为解决CPG控制模型中参数整定效率低、不稳定的问题,阐述基于CPG模型的蛇形搜救机器人控制系统总体方案的设计,提出一种基于遗传算法的CPG控制模型参数优化方法,实现链式CPG网络的节律输出。仿真实现蛇形搜救机器人各关节控制信号的有效输出,仿真结果表明,该方法具有高效、准确、稳定等优点,可有效应用于蛇形搜救机器人的步态控制。  相似文献   

6.
基于耦合驱动蛇形机器人机构设计与抬起的方法   总被引:4,自引:0,他引:4  
叶长龙  马书根  李斌  王越超 《机器人》2003,25(5):419-423
文中设计了模块化的新型蛇形机器人关节单元.该单元具有三个自由度,其中摆动和俯仰自由度由耦合机构驱动来获得较大的力矩和活动空间.由该单元组成的蛇形机器人具有很强的驱动能力,能够抬起较多的单元.针对蛇形机器人的特点,给出了耦合机构的设计原则.对蛇形机器人抬起方法作了分析,得出采用适当规划方法能够抬起的最大单元数量是直接抬起的最大单元数量的平方关系的结论,并在此基础上分析了最大关节角对机器人抬起的影响,最后结合实例验证了上面分析结果.  相似文献   

7.
基于控制函数的蛇形机器人攀爬运动分析   总被引:1,自引:0,他引:1  
魏武  张占 《控制工程》2011,18(2):322-326
为实现对正交关节蛇形机器人多种运动形式的简单、统一控制,从研究蛇形机器人控制函数出发,提出了一种简单的并可同时实现正交关节蛇形机器人蜿蜒运动、行波运动、侧向翻滚运动和螺旋攀爬运动等多种运动形式的控制函数.对蛇形机器人实现螺旋攀爬运动的控制参数进行了分析,并用粒子群优化算法(PSO)对控制参数进行了优化拟合,给出了控制参...  相似文献   

8.
基于循环抑制CPG模型控制的蛇形机器人蜿蜒运动   总被引:3,自引:0,他引:3  
根据生物蛇和蛇形机器人的结构及运动特点,应用循环抑制CPG建模理论构建了蛇形机器人神经网络模型;利用蛇形机器人模型,仿真验证了CPG模型对蜿蜒运动控制的有效性;提出并仿真验证了实现有目的转弯控制的CPG参数调节方法。最后,给出了今后的研究方向。  相似文献   

9.
李东方  邓宏彬  潘振华  彭腾  王超 《机器人》2019,41(4):433-442
针对蛇形机器人在流场中各关节之间的轨迹跟踪问题,研究一种基于改进蛇形曲线的蛇形机器人在流场中避障的轨迹跟踪控制律.首先,考虑流体环境可能施加在蛇形机器人系统上的外部干扰,采用浸入边界-格子Boltzmann方法(IB-LBM)在流场中建立障碍通道和蛇形机器人的流固耦合模型.然后,对蛇形机器人加入势函数,使其可以避开障碍;并采用改进的蛇形曲线方程使机器人尾部各关节跟踪头部的运动轨迹.最后,通过Matlab仿真和实验,研究不同流场密度、机器人尾部摆动频率以及流场雷诺数等参数对蛇形机器人轨迹跟踪的影响.理论分析和数值仿真表明,所设计的轨迹跟踪控制律不仅可以使蛇形机器人在遇到障碍时各关节跟踪前一关节的运动轨迹,而且还能使横向距离、纵向距离及方向角趋于稳定,达到有效避障的目的.此外,蛇形机器人在离开障碍通道后,各关节可以恢复蛇形曲线的运动形式,为蛇形机器人提供源源不断的前进动力.仿真和实验结果验证了轨迹跟踪控制律的有效性.  相似文献   

10.
蛇形机器人侧向运动的研究   总被引:3,自引:2,他引:3  
陈丽  王越超  马书根  李斌 《机器人》2003,25(3):246-249
本文提出了一种新型蛇形机器人机构,建立了其空间运动学模型,实现了蛇形 机器人的两种侧向运动:侧向蜿蜒运动和侧向滚动,前者通过调节两个异相波的频率比,实 现了任意方向的侧向运动.后者通过控制运动波的幅值变化,实现了各种形式的纯侧向移动 ,当幅值足够大时,这种侧向滚动可以跨越障碍.  相似文献   

11.
In this paper, we propose an obstacle avoidance method for autonomous locomotion control of a snake robot. The snake robot consists of rigid links, active joints and passive wheels, and can move only by varying its shape. The pass planning for the obstacle avoidance is a complicated problem because the snake robot has many states, control inputs and the under-actuated property. In our proposed method, the snake motion is restricted to a periodic undulate curve (called a serpenoid curve) by an additional control constraint and the undulate curve is tuned by switching the control constraint in order that the snake robot avoids the obstacle. Therefore, the path planning is simplified and the snake robot will achieve the obstacle avoidance with an efficient path. In this paper, we denote the details of our method and investigate the effectiveness of our strategy by numerical simulations.  相似文献   

12.
一个微小型仿蛇机器人样机的研究   总被引:5,自引:2,他引:3  
崔显世  颜国正  陈寅  林良明 《机器人》1999,21(2):156-160
本文从仿生机械学的角度出发,阐述了仿蛇机器人的 运动原理,给出了仿蛇机器人的结构和基本运动模式,在此基础上研制成微小型仿蛇机器人 样机,对样机进行了实验,结果表明,该样机能在平面上实现驱动运动并完成各项设定操作 .  相似文献   

13.
This paper presents a kinematic calculation and control method for an inextensible continuum planar snake robot. The snake robot is assumed to move without side slipping; this constraint makes it easy to construct its kinematic model based on which we can analyze the movement of the robot. The kinematic model is expressed as a semi-linear partial differential equation (PDE). We discuss the general solution of the PDE and a calculation method based on it. However, the constraint also raises the problem of singular posture. The problem of singularities has been addressed for a snake robot with a serial link structure; however, for a continuum snake robot, much less research has been carried out. In this paper, we propose a method for controlling the direction of movement while avoiding singularities. The validity of our method is tested through simulations and experiments.  相似文献   

14.
Most of the research conducted on snake robots has been on movement, control or dynamics. There is only some research dealing with the reduction of actuators’ sizes. Actuator size usually depends on the force/torque it can provide. Small actuators imply a more efficient, long lasting, lighter and more flexible robot. The required force/torque and energy consumption consequently is directly affected by the mechanism design. Mother nature has always presented optimum systems and has inspired engineers. In this paper, we have adopted the snake anatomy to design a snake robot. The results show a reduction in torque demand. This robot is an extension of our previous research on building a snake without including the anatomy. The new robot weighs about only one-third of the previous version.  相似文献   

15.
随着仿生机器人的发展,实现蛇形机器人多形式越障运动,关节电机起关键作用。主要探讨了蛇形机器人关节电机的选择。可作为蛇形机器人关节的目前有四种电机可选:球形步进电机、舵机、伺服电机和步进电机。选用舵机作为关节电机,将很难克服堵转弊病,位置闭环系统以及体积问题也不适应蛇形机器人的力学情况;选用带减速的步进电机是较可行的方案。但选用步进电机必须解决解决三大问题:提高输出转矩,加大减速比;提高高压电源电压;解决电机外壳的散热。这三项都是行之有效的措施。  相似文献   

16.
In this paper, we consider trajectory tracking control of a head raising snake robot on a flat plane by using kinematic redundancy. We discuss the motion control requirements to accomplish trajectory tracking and other tasks, such as singular configuration avoidance and obstacle avoidance, for the snake robot. The features of the internal motion caused by kinematic redundancy are considered, and a kinematic model and a dynamic model of the snake robot are derived by introducing two types of shape controllable point. The first is the head shape controllable point, and the other is the base shape controllable point. We analyzed the features of the two kinds of shape controllable point and proposed a controller to accomplish the trajectory tracking of the robot’s head as its main task along with several sub-tasks by using redundancy. The proposed method to accomplish several sub-tasks is useful for both the kinematic model and the dynamic model. Experimental results using a head raising snake robot which can control the angular velocity of its joints show the effectiveness of the proposed controller.  相似文献   

17.
This article presents a project that aims at constructing a biologically inspired amphibious snake-like robot. The robot is designed to be capable of anguilliform swimming like sea-snakes and lampreys in water and lateral undulatory locomotion like a snake on ground. Both the structure and the controller of the robot are inspired by elongate vertebrates. In particular, the locomotion of the robot is controlled by a central pattern generator (a system of coupled oscillators) that produces travelling waves of oscillations as limit cycle behavior. We present the design considerations behind the robot and its controller. Experiments are carried out to identify the types of travelling waves that optimize speed during lateral undulatory locomotion on ground. In particular, the optimal frequency, amplitude and wavelength are thus identified when the robot is crawling on a particular surface.  相似文献   

18.
Snake robots have shown a great potential for operations in confined workplaces that are less accessible or dangerous to human workers, such as the in-pipe inspection. However, the snake robot teleoperation remains a nontrivial task due to the unique locomotion mechanism (e.g., helical motion) and the constraints of the workplaces including the low visibility and indistinguishable features. Most snake robot feedback systems are based on the live camera view only. It is hard for the human operator to develop a correct spatial understanding of the remote workplace, leading to problems such as disorientation and motion sickness in snake robot teleoperation. This study designs and evaluates an innovative haptic assistant system for snake robot teleoperation in the in-pipe inspection. An upper-body haptic suit with 40 vibrators on both the front and back sides of the human operator was developed to generate haptic feedback corresponding to the bottom and up sides of the snake robot, transferring the egocentric sensation of the snake robot to the human operator. A human-subject experiment (n = 31) was performed to evaluate the efficacy of the developed system. The results indicate that the proposed haptic assistant system outperformed other feedback systems in terms of both task performance and subjective workload and motion sickness evaluations. It inspires new control and feedback designs for the future snake robot in industrial operations.  相似文献   

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