14. The method of claim 8, wherein identifying commands from the user includes determining a projection matrix. 15. The method of claim 14, wherein identifying commands from the user includes: determining a distance from the plurality of signals to a command code based at least in part on the projection matrix; and comparing the determined distance to a predetermined distance threshold. 16. The method of claim 8, wherein controlling an operation of the system comprises controlling an operation of at least one robotic limb. 18. The method of claim 17, wherein determining the one or more command codes includes determining a null space associated with the first plurality of signals. 19. The method of claim 17, wherein identifying the one or more command codes includes comparing the second plurality of signals to an operational range and/or null space of the first plurality of signals. 20. The method of claim 17, wherein identifying the one or more command codes 17. A method for controlling a system, the method comprising: receiving a first plurality of signals from a plurality of sensors, wherein the first plurality of signals are associated with routine performance of a task; determining one or more command codes based at least in part on the first plurality of signals; receiving a second plurality of signals from the plurality of sensors during operation of the system; identifying the one or more command codes from the second plurality of signals; and controlling an operation of the system based on the identified command codes.