Estimation of tendon slack length of knee extension/flexion muscle

In this paper, we consider about a model to estimate the knee joint extension/flexion moment using the angle of the joints and EMG signal. We need exact muscle-tendon parameters for exact estimation of knee moment. But It is very difficult. The muscle force is sensitive to the tendon slack length. So, we developed the algorithm which finds the tendon slack length of quadriceps for more accuracy estimation of knee extensor/flexor moment. The algorithm is implemented with least square method using difference between experiment moment and computation moment. The experiment moment is onepsilas maximum isometric contraction knee extension/flexion moment. Algorithm realization is used the MATLAB optimization tool box. And it is evaluated by using an experiment data.