Modification of Muscle Force Prediction Model Based on Muscle Fatigue Analysis
Huang Naihan;Yang Xidong;Chen Xiang;Department of Electronic Science and Technology,University of Science and Technology of China;
Objective To improve the versatility of muscle force prediction,a modification method for muscle force prediction model under fatigue state was explored. Methods Experiments were conducted under both non-fatigue state and fatigue state. The mathematical model of muscle force prediction was established firstly using polynomial curve fitting with a least-square calculation. Then experiments of muscle fatigue during constant and ramp force contractions were carried out to analyze the effect of fatigue on muscle force prediction.Finally,the relationship between muscle force prediction model coefficients and fatigue level was built and used to modify the model of muscle force prediction under fatigue. Results The experiment results showed that the predicting errors of the modified model kept stable while muscle fatigue was increasing. Conclusion The proposed method is effective and feasible to predict the muscle force under muscle fatigue during ramp force contraction.