System classification accuracy with and without the SFTM. The classification accuracy of the EMG PR system with (black lines) and without (grey lines) the SFTM as the number of distorted signals increased. (A): the classification accuracy averaged across five able-bodied subjects (AB1-AB5). More detailed results showing the values of mean ± standard deviation and the results of statistical analysis are presented in Table 3. (B): the classification accuracy for the subject with limb deficiency (TR1).