Patent ID: 9520816
Filing Date: 2016-12-13
CPC Classification: B60L,G05B,H02P,Y02T

Claim Text:
1. An apparatus comprising: a controller configured to wherein the desired signature comprises at least one of electromagnetic signals and acoustic signals generated by operation of the group of electric motors; wherein the controller is distributed among the group of electric motors and comprises a primary controller and a plurality of secondary controllers; wherein a first secondary controller in the plurality of secondary controllers is configured to send a request to the primary controller to use a requested switching frequency, a second secondary controller in the plurality of secondary controllers is configured to send a request to the primary controller to use the requested switching frequency, and in response to the requests, the primary controller assigns the selected switching frequency from the group of switching frequencies for the desired signature to the first secondary controller based on a priority scheme; and wherein the primary controller selects the selected switching frequency depending on whether detectability of an acoustic signature is prioritized during a particular phase of flight.