膝上型假肢的運(yùn)動(dòng)意圖識(shí)別與控制
[Abstract]:According to different road conditions and typical Cartesian product combination, using the information of gyroscope, accelerometer and pressure sensor in front and back of foot, through correlation coefficient analysis, the sensor is fused. The Hidden Markov Model (hmm) is used to judge the motion intention of the prosthetic user. Taking the motion state of the healthy limb as the reference value, the control knowledge database under different road conditions and walking speed was established by using iterative learning control (ILC). The key state change signal of the sensor drives the state transition of the finite state machine and outputs the control quantity in the control knowledge base to realize the control of the gait phase of the knee joint under different road conditions and gait speed conditions. Aiming at the real-time deviation of output in the process of control, on-line correction measures are adopted. For the time synchronization problem of the output control data series of the finite state machine, the corresponding measures are taken to maintain and compensate the time synchronization. The results show that the accuracy of road condition judgment can be improved to 91.7% after the processing of Hidden Markov Model. The model-free control method based on data-driven can effectively control the gait of artificial limbs under different road conditions and gait speeds.
【作者單位】: 河北工業(yè)大學(xué)控制科學(xué)與工程學(xué)院;河北工業(yè)大學(xué)智能康復(fù)裝置與檢測(cè)技術(shù)教育部工程研究中心;
【基金】:國(guó)家自然科學(xué)基金資助項(xiàng)目(61703135,61773151) 河北省自然科學(xué)基金青年基金資助項(xiàng)目(F2016202327)
【分類(lèi)號(hào)】:R496;TP212.9
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