Apparatus and method for suppressing mechanical resonance in a mass transit vehicle
First Claim
1. A mass transit vehicle comprising:
- a traction motor responsive to a first signal;
a velocity detection device for outputting a second signal; and
a control system responsive to said second signal for generating a third signal and outputting said first signal, the control system including a filter for isolating a carrying signal from a resonance signal superimposed thereon, said resonance signal corresponding to a resonance signal superimposed on said second signal.
1 Assignment
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Accused Products
Abstract
A mass transit vehicle traction motor control system includes an automatic control block for receiving and processing a tachometer signal having a first resonance signal superimposed thereon to produce a rate request signal having a corresponding second resonance signal superimposed thereon. A filter is provided for decreasing an amplitude of the second resonance signal whereupon the rate request signal is isolated therefrom. A communication and control block and a propulsion and control block co-act to process the isolated rate request signal to produce a speed control signal that is configured to cause a traction motor of a mass transit vehicle to provide motive force to the mass transit vehicle at a rate related to the value of the speed control signal.
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Citations
32 Claims
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1. A mass transit vehicle comprising:
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a traction motor responsive to a first signal; a velocity detection device for outputting a second signal; and a control system responsive to said second signal for generating a third signal and outputting said first signal, the control system including a filter for isolating a carrying signal from a resonance signal superimposed thereon, said resonance signal corresponding to a resonance signal superimposed on said second signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A mass transit vehicle traction motor controller comprising:
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a traction motor responsive to a speed control signal; a tachometer responsive to an angular velocity of said traction motor for outputting a tachometer signal; and a control system responsive to said tachometer signal for generating a rate request signal and outputting said speed control signal, the control system including a filter for isolating a carrying signal from a resonance signal superimposed thereon, said resonance signal corresponding to a resonance signal superimposed on said tachometer signal. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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23. A method of controlling a traction motor of a mass transit vehicle comprising the steps of:
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a) receiving a tachometer signal having a resonance signal superimposed thereon; b) processing said tachometer signal and said resonance signal to produce a rate request signal having said resonance signal superimposed thereon; c) decreasing an amplitude of said resonance signal thereby producing an isolated rate request signal; and d) processing said isolated rate request signal to produce a speed control signal that is configured to cause a traction motor of a mass transit vehicle to provide motive force to the mass transit vehicle at a rate related to a value of said speed control signal. - View Dependent Claims (24, 25, 26, 27)
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28. A system for controlling a traction motor of a mass transit vehicle comprising:
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means for receiving a tachometer signal having a resonance signal superimposed thereon; means for processing said tachometer signal and said resonance signal to produce a rate request signal having said resonance signal superimposed thereon; means for decreasing an amplitude of said resonance signal thereby producing an isolated rate request signal; and means for processing said isolated rate request signal to produce a speed control signal that is configured to cause a traction motor of a mass transit vehicle to provide motive force to the mass transit vehicle at a rate related to a value of said speed control signal. - View Dependent Claims (29, 30, 31, 32)
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Specification