Abstract: An automated signal compliance monitoring and alerting system (ASCMAS) that automatically monitors and provides historical and real-time alerting for mobile assets in violation of a signal aspect, such as a stop light, traffic light, and/or speed limit signal, and/or operating the mobile asset unsafely in an attempt to maintain compliance to a signal. ASCMAS works in conjunction with a data acquisition and recording system (DARS) for mobile assets that includes a data center onboard the mobile asset and a data center remote from the mobile asset. A first artificial intelligence model of at least one of the data centers determines whether the mobile asset is a leading and/or controlling mobile asset. From video content obtained from one of the data centers, a second artificial intelligence model determines an episode involving the mobile asset.

Abstract: A system and method of operating a correlative display system for a plurality of display systems on an aircraft includes receiving, by a processor, an identification of a feature from a user interface associated with a first display system of the plurality of display systems. The processor determines a location of the identified feature relative to data displayed on each other display system of the plurality of display systems, wherein the identified feature is not previously displayed on at least one of the other display systems of the plurality of display systems. The processor generates instructions to highlight the identified feature on each other display system of the plurality of display systems at the determine location relative to data displayed on each other display system.

Abstract: A data acquisition and recording system (DARS) for mobile assets that includes a data recorder and an automated signal monitoring and alerting system. The data recorder includes a data encoder, an onboard data manager, a vehicle event detector, at least one local memory component, and a queueing repository. DARS processes data from at least one input sensor and stores a compressed record of the data at least once per second in the local memory module. DARS is designed to run in near real-time mode, storing a full record comprising five minutes of data to a remote memory module every five minutes, and in real-time mode, streaming data to the remote memory module by uploading a record of data at least once per second and up to once every tenth of a second.

Abstract: A system and method of operating a correlative display system for a plurality of display systems on an aircraft includes receiving, by a processor, an identification of a feature from a user interface associated with a first display system of the plurality of display systems. The processor determines a location of the identified feature relative to data displayed on each other display system of the plurality of display systems, wherein the identified feature is not previously displayed on at least one of the other display systems of the plurality of display systems.

Abstract: An amplifier has at least several stages activated only to one of two bi-level states controlled in response to the value of an input source exceeding a threshold for each stage. Each stage has a different threshold. The thresholds and source are arranged so that the stages change between the bi-level states as the value of the source changes relative to the thresholds of the different stages. Bi-level outputs of the stages are summed together. The values of the thresholds are continuously varied by a small amount relative to a predetermined maximum value for the source in response to a noise source that is independent of the signal source. A power supply for the stages includes an AC-DC converter having plural primary windings and several secondary windings, one for each of the stages. The windings are coupled together so that at all times loading of the primary windings by the secondary windings as a result of activation of the output stages is approximately equal.

Abstract: A power amplifier for a plate load of an AM, RF transmitter includes plural switching stages each powered by a DC source. Each stage is switched from non-sourced to saturation in response to the amplitude of an analog source exceeding a threshold amplitude for the stage; each stage has a different threshold. The thresholds and analog source are arranged so that responses derived between output terminals of the stages change between zero and predetermined amplitudes as the source amplitude changes relative to the thresholds of the different stages. The responses of the different stages are summed. A triangular wave having a small constant maximum amplitude relative to the analog source maximum value effectively changes the threshold of each stage.

Abstract: An RF-AM transmitter of the type including a power pulse amplifier driving an RF amplifier with a modulating voltage via a low pass filter includes a pulse width modulator for deriving variable frequency pulses having a frequency that is a direct function of an RMS like function of the amplitude and frequency of an information source; the width of the pulses is determined by the instantaneous amplitude of the information signal source. The pulse width modulator includes a constant amplitude, variable frequency triangular wave voltage controlled oscillator responsive to a DC signal representing the frequency and amplitude of the information source. In response to amplitude crossovers between the variable frequency triangular wave and the information source, transitions in the pulse width modulated wave are derived.

Abstract: An RF-AM transmitter includes a pulse amplifier responsive to a pulse width modulated (PWM) signal derived in response to an information signal. A low pass filter converts pulses derived by the power amplifier into a variable amplitude signal that is DC coupled to a power supply for an RF amplifier. An amplifier system including the pulse and RF amplifiers has stray capacitance coupled to a modulator which derives the PWM signal; the stray capacitance lengthens narrow modulator output pulses so they are excessively long. The amplitude of only the narrow pulses is reduced by a resistor-capacitor timing circuit in series with a switch to substantially preserve the narrow pulse area. The switch provides a low impedance path from the timing circuit to a reference potential terminal when current initially flows in the circuit during pulse transitions and throughout the length of each of the short duration pulses.