共查询到19条相似文献,搜索用时 312 毫秒
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基于Backstepping时变反馈和PID控制的移动机器人实时轨迹跟踪控制 总被引:10,自引:0,他引:10
根据机器人的运动学模型,采用分层控制的思想将移动机器人的轨迹跟踪控制分为两部分:轨迹跟踪控制器和机器人速度PID控制器。基于Backstepping时变状态反馈方法和Lyapunov理论,引入具有双曲正切特性的虚拟反馈量,提出一种移动机器人全局轨迹跟踪算法:采用PID速度控制器以满足机器人驱动电机实时调速要求。考虑到机器人的动力学约束,引入受限策略以保证其运动平滑。在基于DSP的两轮驱动移动机器人上对算法进行了实时轨迹跟踪试验,取得了满意的控制效果。 相似文献
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对机器人手指关节驱动用直线驱动器的位置控制提出了单神经元自适应控制方案。通过实验验证了控制方案的正确性,为机器人手指关节的位置控制提供了一种有效方法。 相似文献
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考虑到实际行驶中要受到道路的空间约束,针对一类四轮式移动机器人,提出一种基于两个正交速率控制的镇定算法.驱动机器人转向至朝路径方向前进,在笛卡儿空间的两个正交轴向上,当机器人与目标点坐标差小于设定阈值时,分别以幂律逐步减小机器人在两方向上的速度分量.道路仿真实验表明,在此控制律的作用下,机器人能在有限时间内实现平面的任意点-点镇定,所得控制器不仅设计简单、收敛速度快,而且能应用在受限空间,具有一定的普遍性。 相似文献
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为降低直线电机驱动电路的成本,该文利用8位的AVR单片机实现了直线电机的位置控制,控制精度达到了0.05 mm。文中设计了直线电机的驱动电路,合理地简化了电压空间矢量的合成算法,提出了从霍尔反馈中快速获取电机推杆位置的方法,开发了限幅比例增量式控制律,进行了直线电机的位置控制硬件实验,实验结果证明本设计方案满足了实时性和精度要求。 相似文献
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柯建波 《国外电子测量技术》2020,(3):104-108
双足机器人在驱动步行中受到活动部件的复合扰动作用容易产生耦合误差,导致解耦控制的稳定性不好,为了提高双足机器人驱动步行中的解耦控制的稳定性,提出一种基于变步长动态平衡反馈调节的双足机器人驱动步行位姿修正解耦控制方法。采用分布式传感器阻力力学采集方法进行双足机器人的姿态参量测量和动态融合处理,构建双足机器人驱动步行位姿修正解耦控制的约束参量模型和控制目标函数,采用Kalman滤波方法进行双足机器人驱动步行的地面环境适应校正和误差修正,采用变步长动态平衡反馈调节方法确定精准的驱动步行姿态参量,实现双足机器人准确的姿态定位和参量解算。仿真结果表明,采用该方法进行双足机器人驱动步行姿态定位控制的准确度较高,环境适应性较好,实现零误差驱动步行,提高了双足机器人的控制品质。 相似文献
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Kiyoshi Ohishi Masanori Ohnishi Toshimasa Miyazaki 《Electrical Engineering in Japan》1997,118(4):58-69
This paper proposes a simple and robust robot motion control method using a robust velocity controller. The robust velocity controller is based on H∞ control theory, and is called H∞ velocity controller. The H∞ velocity controller based motion control method is completely equivalent to the robust acceleration control method using the H∞ acceleration controller, but it has simpler structure. Therefore, the proposed system can realize a fine robot motion control easily. To confirm the validity of the proposed method, this paper realizes the hybrid control of position and force for a multijoint robot manipulator. Further, the simple realization of hybrid control is proposed considering the attitude of the robot manipulator. This system achieves hybrid control of position and force of the robot manipulator while maintaining a perpendicular attitude to the target environment. The experimental results in this paper show that the proposed system has the desired force and position response to the target environment. © 1997 Scripta Technica, Inc. Electr Eng Jpn, 118 (4): 58–69, 1997 相似文献
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Yeong-Chan Chang Bor-Sen Chen 《International Journal of Adaptive Control and Signal Processing》1998,12(6):495-526
Both dynamic state feedback as well as output feedback tracking control designs are presented in this paper for constrained robot systems under parametric uncertainties and external disturbances. The previous studies on tracking control design, not considering the velocity measurements, address only the unconstrained robot design. In contrast, a dynamic output feedback controller based on a linear and reduced-order observer that uses only position measurements is proposed here for the first time to treat the trajectory tracking control problem of constrained robot systems. Both adaptive state feedback control schemes and adaptive output feedback control schemes with a guaranteed H∞ performance are constructed. It is shown that all the variables of the closed-loop system are bounded and a pre-assigned H∞ tracking performance is achieved, in the sense that the influence of external disturbance on the tracking motion error can be attenuated to any specified level. Moreover, it is also shown that the motion and force trajectories asymptotically converge to the desired ones as the dynamic model of robot systems is well-known and the external disturbance is neglected. Finally, simulation examples are presented to illustrate the tracking performance of a two-link robotic manipulator with a circular path constraint by the proposed control algorithms. © 1998 John Wiley & Sons, Ltd. 相似文献
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研究了一类复杂环境下移动群机器人的建模与控制策略。采用栅格法对机器人工作环境进行建模,基于个体的有限感知能力和局部的交互机制设计了响应概率函数,解决群机器人任务分配与信息共享难题。通过施加螺旋控制于早期信号搜索,并将该搜索信息作为启发因子改进动态差分进化算法,对群机器人进行路径优化。仿真结果表明,当响应概率函数中距离变量调节因子β=0.006时,任务分配控制算法达到最好效果。同时,移动群机器人路径规划的平均路径长度珔S,平均移动时间珔T以及平均收敛代数珚M,相比扩展PSO算法分别提高了16%、57%及230%。最后,将该算法应用于ASUIII型轮式移动群机器人物理实验,并设计了协同控制平台,具有较好的工程应用价值。 相似文献
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Takashi Yasuno Takuya Kamano Takayuki Suzuki Kazuo Uemura Hironobu Harada Yu Kataoka 《Electrical Engineering in Japan》2000,131(2):30-39
This paper introduces a human skill base control algorithm using artificial neural networks and fuzzy reasoning for an autonomous mobile robot. Neural networks are used to select a suitable motion control pattern in actual environments. The back propagation algorithm adjusts the weights of the neural networks so that the selected motion control pattern corresponds to the action, which is obtained by the operator's behavior decision skill. To realize the selected motion control pattern, the orientation angle and the speed of the mobile robot are determined by fuzzy reasoning in which fuzzy rules are also automatically tuned so as to simulate the operator's control skill. We have implemented and tested the proposed control algorithm on an autonomous mobile robot and some experimental results demonstrate the effectiveness of the proposed control algorithm for the autonomous mobile robot. © 2000 Scripta Technica, Electr Eng Jpn, 131(2): 30–39, 2000 相似文献