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基于模糊控制的2R欠驱动机器人位置控制 总被引:4,自引:1,他引:4
基于模糊控制理论,研究2R欠驱动机器人关节的位置控制问题.在被动关节附加电磁制动器以控制关节间的耦合状态.根据电磁制动器的工作状态,将欠驱动机器人的位置控制分为两个阶段.第一阶段,制动器解锁,利用被动关节加速度与驱动关节转矩间的动力学耦合效应,间接控制被动关节沿预定轨迹运动到预定位置,同时总结模糊控制规则,设计用于控制被动关节运动的模糊控制器.第二阶段,制动器锁定,然后驱动关节运动到预定位置.设计并搭建了基于可编程多轴运动控制卡的试验控制系统.最后通过试验成功实现2R欠驱动机器人关节的位置控制.试验数据表明,模糊控制方法对于机器人被动关节具有较高的位置控制精度,鲁棒性良好,并且不依赖于机器人动力学模型,实时控制的计算量小,体现出智能控制的优越性. 相似文献
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针对伺服电机作为驱动装置的并联机器人,首先运用模糊神经网络(FNN)控制策略对驱动侧进行控制仿真,在分析结果后,结合Teiminal滑模控制方法,提出一种新的控制策略,用FNN输出代替滑模中引起抖振的切换部分,Terminal滑模函数的选取保证了输出跟踪误差在有限时间内收敛到零,仿真结果表明,所提出的控制策略可以实时的满足并联机器人的高精度,高速度控制要求. 相似文献
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并联六自由度机器人智能控制算法的研究 总被引:5,自引:0,他引:5
并联六自由度机器人在许多行业有着非常好的应用前景,其特殊结构给机器人带来许多其它机器人不具备的优点,但是也给机器人的精确控制造成了困难。机器人运动时每个液压缸上分配的负载是变化的,因此每个液压伺服回路的受力、频率等系统参数也是变化的,常用的控制算法很难实现系统的精确控制。为了解决该问题,文章在建立了系统数学模型的基础上,设计一种采用双链交叉算子的遗传算法来荻取模糊控制的经验,实现对机器人的智能模糊控制。仿真实验表明:该控制算法能够比较精确地控制并联机器人,效果要优于一般的控制算法,并且操作简单、智能程度高。 相似文献
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In this paper, the position and force tracking control problem of cooperative robot manipulator system handling a common rigid object with unknown dynamical models and unknown external disturbances is investigated. The universal approximation properties of fuzzy logic systems are employed to estimate the unknown system dynamics. On the other hand, by defining new state variables based on the integral and differential of position and orientation errors of the grasped object, the error system of coordinated robot manipulators is constructed. Subsequently by defining the appropriate change of coordinates and using the backstepping design strategy, an adaptive fuzzy backstepping position tracking control scheme is proposed for multi-robot manipulator systems. By utilizing the properties of internal forces, extra terms are also added to the control signals to consider the force tracking problem. Moreover, it is shown that the proposed adaptive fuzzy backstepping position/force control approach ensures all the signals of the closed loop system uniformly ultimately bounded and tracking errors of both positions and forces can converge to small desired values by proper selection of the design parameters. Finally, the theoretic achievements are tested on the two three-link planar robot manipulators cooperatively handling a common object to illustrate the effectiveness of the proposed approach. 相似文献
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Robotic-assisted surgical system has introduced a powerful platform through dexterous instrument and hand−eye coordination intuitive control. The knowledge of laparoscopic vision is a crucial piece of information for robot-assisted minimally invasive surgery focusing on improved surgical outcomes. Obtaining the transformation with respect to the laparoscope and robot slave arm frames using hand−eye calibration is essential, which is a key component for developing intuitive control algorithm. We proposed a novel two-step modified dual quaternion for hand−eye calibration in this study. The dual quaternion was exploited to solve the hand−eye calibration simultaneously and powered by an iteratively separate solution. The obtained hand−eye calibration result was applied to the intuitive control by using the hand−eye coordination criterion. Promising simulations and experimental studies were conducted to evaluate the proposed method on our surgical robot system. We extensively compared the proposed method with state-of-the-art methods. Results demonstrate this method can improve the calibration accuracy. The effectiveness of the intuitive control algorithm was quantitatively evaluated, and an improved hand−eye calibration method was developed. The relationship between laparoscope and robot kinematics can be established for intuitive control. 相似文献
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一种预测模糊集成控制系统的设计方法 总被引:6,自引:1,他引:6
将预测控制方法与模糊控制方法相结合,构成一类预测模糊集成控制系统。用以解决工业过程控制系统中存在的且难以处理的大滞后与非最小相位问题。文章最后给出仿真结果。 相似文献
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设计与分析了交流伺服系统FZ-PID的复合控制原理,针对阀值切换三存在的缺陷提出了一种基于模糊则切换的复合控制器。实验结果表明基于模糊切换方式下交流伺服系统具有较快的速度响应,较高的稳态精度和较小的超调,并实现了两种控制的平滑过度。 相似文献
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基于模糊PID控制器的多电机同步控制装置的应用 总被引:9,自引:0,他引:9
该文在PID控制的基础上引入了模糊逻辑的概念,提出了一种较新的模糊PID控制算法,并使之应用在多电机同步控制装置中,实验结果表明该控制器能够大大增强系统的动态特性,使多电机良好地以一定速度同步运行。 相似文献