Abstract: A brake system of a vehicle includes a plurality of electromechanical brake actuators (EBAs) proximate the wheels of the vehicle. Each EBA includes a power device for effectuating braking of an associated wheel, and electronics to generate a drive signal for the power device. The brake system may further include at least one brake control unit (BCU) for converting a brake command signal into a control signal for each EBA. The electronics for each EBA may be configured to convert the corresponding control signal into the drive signal that is applied to the power device to cause movement of the power device and effectuate braking of the vehicle.

Abstract: A system, apparatus and method of verifying operation of a vehicle fluid brake system shutoff valve is provided, wherein the shutoff valve is adapted to enable or inhibit the transmission of fluid pressure to at least one brake solenoid valve that controls operation of at least one brake actuator so as to effect wheel braking. In verifying operation of the system, the shutoff valve is commanded to inhibit the transmission of fluid pressure to the at least one brake solenoid valve, and the at least one brake solenoid valve is commanded to apply fluid pressure to the at least one brake actuator. An operational status of the shutoff valve is determined based on the absence or presence of wheel braking.

Abstract: A system, apparatus and method of verifying operation of a vehicle fluid brake system shutoff valve is provided, wherein the shutoff valve is adapted to enable or inhibit the transmission of fluid pressure to at least one brake solenoid valve that controls operation of at least one brake actuator so as to effect wheel braking. In verifying operation of the system, the shutoff valve is commanded to inhibit the transmission of fluid pressure to the at least one brake solenoid valve, and the at least one brake solenoid valve is commanded to apply fluid pressure to the at least one brake actuator. An operational status of the shutoff valve is determined based on the absence or presence of wheel braking.

Abstract: LED brightness compensation system and method to account for aging and/or temperature effects on LED brightness. The system includes one or more LEDs and a circuit coupled to the LEDs to maintain substantially constant LED brightness based on determined operating characteristics of the LEDs. The circuit includes an LED brightness controller for controlling the current running through the LEDs and a brightness compensation controller for directing the LED brightness controller to compensate for aging and/or temperature. The method includes: storing adjustment information in a memory unit; energizing one or more LEDs with an electric current; accumulating the operating time; sensing the operating temperature of the LEDs; and adjusting the current supplied to the LEDs based on the stored adjustment information, the accumulated time the LEDs have been energized, and the operating temperature of the LEDs.

Abstract: A wireless synchronization system. The system includes a plurality of nodes. Each node includes a radio frequency (RF) transceiver, one or more strobe lights and a controller in signal communication with the RF transceiver and the one or more strobe lights. The controller controls operation of the one or more strobe lights based on a synchronization message wirelessly received by the RF transceiver and generates and transmits via the RF transceiver a follow-on synchronization message based on the received synchronization message.