Abstract: A system and method using push-button energy harvesting (EH) switch devices for controlling devices in an aircraft vehicle, and for dynamically receiving and responding to switch events. The EH switch devices transmit EH switch wireless datagram messages responsive to corresponding EH switch actuations. A gateway transceiver at the aircraft receives and performs a real-time analysis of all EH datagram messages including screening detected EH messages based on a database of commissioned devices. The datagram payload data includes a sequence counter to combat any record-and-replay spoofing attacks. A control processor uses a memory to track reception sequencing for all preconfigured EH switch devices. The sequence counter is transmitted by the EH switch for every commissioned unit and is tracked by the control processor using the memory. If a sequence value received is less than or equal to the last detected sequence value for a particular device, an error message is flagged.

Abstract: In one embodiment, a wheelchair includes a drive wheel, a motor coupled to the drive wheel, and a user input device. The motor, in one embodiment, is configured to rotate the drive wheel. The user input device may be configured to send a signal for controlling a motor parameter. The wheelchair, in one embodiment, includes a caster wheel and a castor sensor configured to sense a caster angle. In one embodiment, a controller is configured to receive the signal for controlling the motor parameter and a signal from the caster sensor and to determine a first turn rate parameter of the wheelchair based upon the received signal from each of the input device and the caster sensor.