华中科技大学学报（自然科学版）2024，Vol.52Issue(5)：50-55,6.DOI:10.13245/j.hust.240433
考虑动态平衡的起立意图预测
Prediction of sit-to-stand intention with dynamic equilibrium
摘要
Abstract
Aiming at the problem that the sit-to-stand intention is difficult to predict and the black box model is lack of biomechanical explanation,a sit-to-stand intention prediction method considering dynamic equilibrium was proposed.According to the law of dynamic equilibrium followed by the human body's sit-to-stand movement,a nonlinear processing method of the centroid trajectory considering the speed of the sit-to-stand movement was proposed,i.e.,extrapolated center of mass(CoM),transforming the Cartesian coordinate plane of the CoM to the dynamic equilibrium reference plane,reducing the dependence of feature data on the human body's motion speed,and improving the accuracy of the judgment of the sit-to-stand intention.Support vector machines(SVM)and neural networks(NN)were used to validate the proposed method,and the proposed method was compared with traditional data processing methods.Results show that the accuracy of model prediction is improved.The prediction accuracy of SVM is improved from 73.3%～74.1%to 79.9%,and the time deviation between stand up time and assist time is reduced from 96～101 ms to 70 ms.The prediction accuracy of the NN increases from 81.2%to 86.2%,and the time deviation decreases from 87 ms to 59 ms.关键词
起立运动/动态平衡/外推质心/意图预测/支持向量机/神经网络Key words
sit-to-stand movement/dynamic equilibrium/extrapolation center of mass/intention prediction/support vector machines/neural network分类
信息技术与安全科学引用本文复制引用
庞牧野,魏东盛,罗晶,魏巍..考虑动态平衡的起立意图预测[J].华中科技大学学报（自然科学版）,2024,52(5):50-55,6.基金项目
国家自然科学基金资助项目(62203341). （62203341）
