摘要
在假肢运动优化控制的研究中,针对动力型假肢控制方面存在的运动模式识别准确性差的问题,搭建人体下肢运动信息系统获取下肢髋关节角速度信号和加速度信号。建立基于BP神经网络的大腿截肢者运动识别模型。研究了建模过程中输入输出数据预处理、网络结构设计、训练模式选择等问题。改进模型能有效识别平地行走、上楼、下楼、上坡和下坡5种运动模式,正确识别率达到了90.4%,已具备一定的实用性。
Lower limb amputation significantly affects the quality of the leg amputee＇s daily life. Recent advancements in eleetromechanical actuators have propelled the recent development of powered artificial legs. Accurately recognizing the leg amputee＇s locomotion intent is required in order to realize the smooth and seamless control of prosthet- ic legs. The approach infers amputee＇s intents of upslope, downgrade, stairs ascent, stairs descent or level-ground walking without the need for instrumentation of the sound-side leg. Specifically, the intent recognizer utilizes the features extracted from accelerometer and gyroscope. The preprocessing of input and output data, design of network structure, training mode selection and other aspects were analyzed. This paper demonstrates via experiments the effectiveness of the approach.
出处
《计算机仿真》
CSCD
北大核心
2014年第5期331-335,共5页
Computer Simulation
基金
国家自然科学基金(61203323)
国家自然科学基金(61174009)
