CHINNARAO MOKKAPATI
Engineers in Export, PA
License number
Pennsylvania PE035122E
Category
Engineers
Type
Professional Engineer
Address
Address
Export, PA 15632
Professional information
Method For Adjusting Braking Parameters Of A Train To Account For Train Characteristic Parameter Variations
US Patent:
2012007, Mar 22, 2012
Filed:
Sep 20, 2011
Appl. No.:
13/237060
Inventors:
Eric Dale Cutright - Charlottesville VA, US
Chinnarao Mokkapati - Export PA, US
Robert Dennis Pascoe - Pittsburgh PA, US
Chinnarao Mokkapati - Export PA, US
Robert Dennis Pascoe - Pittsburgh PA, US
Assignee:
ANSALDO STS USA, INC. - Pittsburgh PA
International Classification:
G05D 1/02
US Classification:
701 70
Abstract:
A method of adjusting one or more of braking parameters used in a braking function to control braking of a train includes determining an adjustment factor based on a joint stopping distance probability distribution, the joint stopping distance probability distribution representing the composite effect on stopping distance of a plurality of predetermined train characteristic parameters, each of the predetermined train characteristic parameters being variable, and applying the adjustment factor to each of the one or more of braking parameters. Also, a method of adjusting braking parameters that includes determining an adjustment factor based on a nominal value, a worst case limit value and a best case limit value of each of a plurality of predetermined train characteristic parameters, each of the predetermined train characteristic parameters being variable, and applying the adjustment factor to each of the one or more of braking parameters.
Vital Railway Signal Link
US Patent:
5535968, Jul 16, 1996
Filed:
Jul 27, 1992
Appl. No.:
7/919863
Inventors:
Chinnarao Mokkapati - Export PA
Ronald R. Capan - Pittsburgh PA
Ronald R. Capan - Pittsburgh PA
Assignee:
Union Switch & Signal Inc. - Pittsburgh PA
International Classification:
B61L 2700
US Classification:
246 3
Abstract:
A vital railway signal link for passing DC signals between a first terminal location and a second terminal location. A transmitter at the first terminal location receives a DC input signal and responsively produces a light signal modulated at a preselected frequency. The light signal is conducted through an optical fiber to the second terminal location. There, a receiver detects the light signal and produces a DC output signal. The receiver contains discriminator circuitry preferably including a bandpass filter to prevent light signals other than those modulated at the preselected frequency from giving an output signal.
System And Method For Controlling Braking Of A Train
US Patent:
2010024, Sep 23, 2010
Filed:
Feb 11, 2010
Appl. No.:
12/703959
Inventors:
Chinnarao Mokkapati - Export PA, US
Robert D. Pascoe - Pittsburgh PA, US
Brian Michael Nypaver - Pittsburgh PA, US
Robert D. Pascoe - Pittsburgh PA, US
Brian Michael Nypaver - Pittsburgh PA, US
Assignee:
Ansaldo STS USA, Inc. - Pittsburgh PA
International Classification:
G05D 1/00
US Classification:
701 20
Abstract:
A method of controlling braking of a train that includes obtaining in an on-board computer of the train a brake propagation delay time (T), a brake build-up time (T) and a maximum brake rate (α) for the train, and controlling braking of the train in the on-board computer by generating one or more braking signals for the train using T, T and α. Also, a methods of determining for a train a profile velocity to a target position of a selected target, selecting a most restrictive target from among a plurality of targets for a train, and determining a plurality of braking parameters for a train having a train consist, wherein the parameters include a brake propagation delay time (T), a brake build-up time (T) and a maximum brake rate (α).