Adaptive control of two robot arms carrying an unknown object

Prabhakar R. Regilla, M. Tomizuka
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引用次数: 23

Abstract

We deal with the control of two robot manipulators carrying an unknown object. We consider the uncertainties in mass, inertia and center of mass of the object. A dynamic model is obtained for the combined system. An adaptive scheme is proposed to track the desired motion trajectory of the object in the presence of uncertainties. A feedforward plus PI type force controller is designed for internal force control. A Lyapunov based stability analysis is conducted for the proposed scheme. In the adaptive motion control scheme for the combined system we cannot specify the individual torques of the manipulators uniquely. To obtain a set of individual torques an optimal control problem is formulated by minimizing a cost function.
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携带未知物体的机械臂自适应控制
我们处理携带未知物体的两个机器人操纵器的控制问题。我们考虑了物体质量、惯性和质心的不确定性。建立了组合系统的动力学模型。针对存在不确定性的情况,提出了一种自适应跟踪目标运动轨迹的方法。为实现内力控制,设计了一种前馈+ PI型力控制器。对该方案进行了基于Lyapunov的稳定性分析。在组合系统的自适应运动控制方案中,不能唯一地指定各个机械手的力矩。为了获得一组单独的转矩,通过最小化成本函数来制定最优控制问题。
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