Abstract: A braking system conducts an electronic command signal via a cable extending through multiple first vehicles in a first segment of a multi-vehicle system. The electronic command signal directs engagement or release of an air brake coupled to a brake pipe that extends along a length of the multi-vehicle system. A pneumatic command signal is communicated via the brake pipe to one or more second vehicles in a second segment of the multi-vehicle system. The pneumatic command signal directs one or more of the engagement or the release of the air brake coupled to the brake pipe in the one or more second vehicles.

Abstract: A braking system conducts an electronic command signal via a cable extending through multiple first vehicles in a first segment of a multi-vehicle system. The electronic command signal directs engagement or release of an air brake coupled to a brake pipe that extends along a length of the multi-vehicle system. A pneumatic command signal is communicated via the brake pipe to one or more second vehicles in a second segment of the multi-vehicle system. The pneumatic command signal directs one or more of the engagement or the release of the air brake coupled to the brake pipe in the one or more second vehicles.

Abstract: A communication system may be provided that includes a lead communication assembly configured to be disposed onboard a lead vehicle in a multi-vehicle system, and a remote communication assembly configured to be disposed onboard a remote vehicle in the multi-vehicle system. The lead communication assembly and the remote communication assembly may be configured to communicate with each other via a wired connection extending along the multi-vehicle system from at least the lead vehicle to at least the remote vehicle. Additionally, the lead communication assembly and the remote communication assembly may also be configured to communicate with each other via a wireless connection. The lead communication assembly and the remote communication assembly may also be configured to switch back-and-forth between communicating with each other via the wired connection and via the wireless connection.

Abstract: A rotary machine includes a stator and a rotor that rotates relative to the stator in response to flow of a fluid by or through the rotor. The rotary machine also includes a control circuit configured to determine one or more operational characteristics of the electric machine. The one or more operational characteristics are indicative of a flow of the fluid or a load placed on the rotary machine, the control circuit configured to apply control signals to control one or more switches of the rotary machine to induce a magnetic field in the rotary machine that resists a force imparted on a rotor of the rotary machine from the flow of the fluid. The control signals control the one or more switches of the rotary machine to control a speed at which the rotor rotates.

Abstract: A system and method include monitoring an operating condition of an electric machine that converts rotational movement into an output voltage that is conducted into a circuit coupled with the electric machine, controlling operation of the electric machine using pulse width modulation signals, and changing a magnitude of the output voltage that is conducted into the circuit from the electric machine as a result of the pulse width modulation signals.

Abstract: A computer and a chassis construction for a computer for severe environmental conditions enclosing a plurality of circuit cards and a power supply includes a sealed, airtight, watertight, metal enclosure having a plurality of integrally joined walls, a first of the plurality of walls having a removable plate for access to the printed circuit cards and the power supply accommodated in the enclosure. The computer for use in a severe environment includes a plurality of printed circuit boards and a power supply and a metal enclosure having a plurality of walls, a top cover and a bottom plate, the enclosure being integrally formed to form an airtight seal along abutting edges thereof. One of the walls has a removable plate and the enclosure is formed of metal. A mechanism is provided for preventing ingress of foreign substances in the enclosure. The mechanism includes a device for shielding the interior of the enclosure from electromagnetic interference (EMI).