摘要:
An apparatus and method for clearing a railroad track of contaminants, such as snow, including a control system for providing control signals to a compressed air system mounted on a locomotive based on a plurality of predetermined conditions. A learning system evaluates the effects of railroad track clearing and provides input for activating the railroad track clearing system.
摘要:
A processor system and method are provided for providing motor excitation frequency control in a vehicle propelled by AC electric traction motors. The processor system and method allow for computing an excitation frequency signal based on a sum of i) a signal indicative of a weighted average of an estimated rotor speed signal and a measured vehicle speed signal and ii) a compensated slip command signal. Effective wheel slip control is thus provided without requiring sensors for measuring rotational speed of the traction motors.
摘要:
A system and method for controlling operation of a diesel electric traction vehicle of the type including a synchronous generator driven by a diesel engine for producing alternating current (AC) electric power, the AC electric power being converted to direct current (DC) electric power and transferred over a DC link to a plurality of DC to AC inverters, and each of the inverters being coupled to transfer controlled frequency power to at least one AC electric traction motor coupled in driving relationship to at least one wheel-axle set of the vehicle. A computer-based control system controls operation of the engine, generator and inverters in response to a power command signal. The control system computes power supplied by the generator from calculated torque developed by the AC traction motors and electric power losses in the inverters and other circuit elements coupling power from the generator to the motors. The computed generator supplied power is compared to the power command signal and engine operation is adjusted so as to minimize any difference between the commanded power and the computed power.
摘要:
A controlled stop system for an AC electric locomotive includes a braking effort control circuit responsive to a braking command regulating braking effort produced by AC traction motors coupled in driving relationship to wheels of the locomotive. The control circuit is responsive to a vehicle speed signal for adjusting motor operation to maintain braking effort to about zero speed. A filter processes the speed signal before application to the braking effort control circuit such that the control circuit operates as a speed regulator at zero speed to maintain the vehicle in a stopped condition.
摘要:
A control system for an AC diesel electric locomotive allowing for continued operation of the locomotive even in the instance of failure of current sensors providing current feedback information. The system is coupled to a plurality of DC to AC inverters with each of the inverters being connected for supplying controlled AC power to at least one AC electric traction motor coupled in driving relationship to wheels of the locomotive. The control system controls the power output of the inverters in response to an operator's command and to sensed operating conditions of the locomotive. One of the sensed operating conditions is power output of the converter determined by measuring its voltage and current output, the latter measurement using a series connected current monitor. The system incorporates apparatus for sensing failure of the current monitor and, in response thereto for modifying the control system to substitute a selected value for the sensed power output of the converter.
摘要:
A system includes a vehicle control system, a friction modification unit, and a friction management module. The vehicle control system is configured to obtain a trip plan for the vehicle. The trip plan is based on one or more characteristics of a trip of the vehicle along a route in a transportation network, characteristics of the vehicle, or characteristics of the route along which the vehicle travels. The trip plan designates one or more tractive operations or braking operations. The friction modification unit is configured to modify a friction characteristic of a surface of the route as the vehicle travels on the route. The friction management module is configured to direct the friction modification unit to modify the friction characteristic of the surface of the route based on the trip plan.
摘要:
A method for vehicle control comprises determining a braking capability of a braking system of a rail vehicle or other vehicle, and modifying application of at least one mission parameter by a control system of the vehicle based on the determined braking capability. Braking capability may be determined by activating the braking system of the vehicle to apply a braking force on the vehicle, and concurrently, applying a level of tractive effort of the vehicle is sufficient to overcome the braking force. The braking capability is determined based on the level of tractive effort.
摘要:
A system includes an interior duct, a blower, a vent coupling, and a secondary duct. The interior duct is fluidly coupled with the inlet and with an energy storage device disposed in a vehicle. The blower draws cooling fluid received through the inlet and through the interior duct to cause a first portion of the cooling fluid to flow over and/or through the energy storage device. The vent coupling directs the first portion of the cooling fluid that flowed over and/or through the energy storage device into a vented area. The secondary duct directs a second portion of the cooling fluid from the interior duct into the vent coupling to mix with the first portion of the cooling fluid after the first portion of the cooling fluid flows over and/or through the energy storage device.
摘要:
A control assembly includes a monitoring module and a switching module. The monitoring module determines a load demand of a first rail vehicle traveling along a track, wherein the first rail vehicle is supplied with electric current from a plurality of power sources over a conductive pathway extending along the track. The switching module is communicatively coupled with the monitoring module and is joined with a switch controller disposed between the power sources and the conductive pathway. The switching module directs the switch controller to change which of the power sources supply the electric current to the first rail vehicle over the conductive pathway based on the load demand.
摘要:
Methods and systems are provided for a vehicle having a plurality of axles and a lift mechanism configured to dynamically transfer weight from one axle to another. In one example, the method comprises, responding to an operating condition by adjusting the lift mechanism to provide a determined amount of lift, and in response to vehicle braking, a vehicle stall risk, poor infrastructure conditions, and/or a high vehicle penalty, reducing the determined amount of lift.