基于碰撞检测的护理型操作臂的安全性设计与实现

针对与人近距离交互的护理型操作臂的安全性问题,提出并实现了一种基于碰撞检测的安全性设计方法,它根据由动力学模型计算获得的参考输出力矩与力矩传感器测得的实际输出力矩间的偏差实现碰撞检测.在关节力矩传感器设计中,采用有限元分析方法来优化应变片的位置布置,并开发了高抗干扰能力的信号处理电路.根据护理型操作臂的低速特点,提出了...

Safety Design and Realization of an Assistive Robotic Manipulator Based on Collision Detection

For the safety problem of an assistive robotic manipulator interacting with human in a close range, a safety design method based on collision detection is presented and realized. The collision is detected by the difference of the reference torque calculated according to the manipulator’s dynamic model and the actual torque measured by torque sensor. In the design of joint torque sensor, the finite element analysis method is applied to optimizing the pasted position of strain gauge, and meanwhile a signal processing circuit with high disturbance-resisting capacity is developed. According to the low speed characteristic of the assistive robotic manipulator, a simplified dynamic model is established to strike a compromise between efficiency and accuracy of the reference torque computation. Experimental results illustrate the higher sensitivity and real-time performance of the proposed design.