associated with user commands. The null space may be used to at least partly identify signals associated with user commands. Consequently, the null space may not contain information associated with the operational range of the plurality signals for a task being performed by the user. [0033] While the use of a range space and/or a null space is described above for identifying commands to a system associated with signals from a plurality of sensors worn by a user, the current disclosure is not limited to using only this identification method. For example, other techniques may be used to identify user commands to a system from a plurality of sensors worn by a user, including, but not limited to, a partial least squares algorithm, a deep neural network classifier, and/or any other appropriate analysis technique as the disclosure is not limited in this regard. [0034] In another embodiment, a command signal may be processed using a projection matrix. For example, a command signal may be projected into a space associated with an operational range of one or more sensors using a projection matrix. The distances between the projected command signal and any predetermined command codes may be measured using any appropriate distance metric. Based on the distances between the projected command signal and the command codes, the command signal may be classified as one of a number of commands. In some embodiments, a command signal may be classified as belonging to the command code closest to the projected command signal. In some embodiments, a projected command signal may be below a predetermined distance threshold from the closest command code prior to being determined to be a command code; otherwise, the command signal may not be assigned to any command code, and no command may be generated. The distance threshold may be selected based on a desired number of false positives and a desired number of false negatives, or other desired metric. For example, in a system in which the cost of issuing a command that was not intended by the user (i.e., in a system in which the cost of a false positive is high), a distance threshold may be set relatively low, so that projected command signals that are not close to a command code are unlikely to be interpreted as commands. Alternatively, in a system that seeks to avoid false negatives, a larger distance threshold may be implemented so that user intent is not mistakenly ignored. Distance thresholds may be determined using any suitable method. For example, distance