Train control having improved wheel wear adjustment for more accurate train operation
First Claim
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1. A control system for a steel wheel vehicle having at least two propulsion/braking units with each operating at least one axle, said system comprising:
- a propulsion/braking control generating current signals to operate the axle motor drives and generating braking signals to operate the associated braking system in accordance with command signals;
a spin/slide control for adjusting said propulsion/braking control in accordance with differential axle speeds to avoid vehicular spins/slides;
means for generating a signal representative of the speed of each axle;
means for generating a signal representative of an entered actual wheel size for a preselected one of said axles;
means for computing speed adjust factors, for the respective axles from the entered actual wheel size, the base wheel sizes and the axle speeds;
means for adjusting the respective axle speeds in accordance with the speed adjust factors and for applying the adjusted axle speeds to said spin/slide control for computation of differential axle speeds with wheel wear compensation;
means for computing tractive effort adjust factors for the respective propulsion/braking units from the actual wheel size, the base wheel sizes and the axle speeds; and
means for applying the tractive effort adjustment factors to said propulsion/braking control for computation and execution of tractive effort with wheel wear compensation.
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Accused Products
Abstract
A microprocessor control system is provided for a steel wheel vehicle having at least two propulsion/braking units. Each unit operates a truck having a pair of axles each with two steel wheels. A propulsion/braking control includes a microprocessor that applies current commands to respective chopper controls that operate the axle motor drives. Braking command signals operate the associated braking system to apply dynamic and/or friction braking in the braking mode.
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Citations
16 Claims
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1. A control system for a steel wheel vehicle having at least two propulsion/braking units with each operating at least one axle, said system comprising:
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a propulsion/braking control generating current signals to operate the axle motor drives and generating braking signals to operate the associated braking system in accordance with command signals; a spin/slide control for adjusting said propulsion/braking control in accordance with differential axle speeds to avoid vehicular spins/slides; means for generating a signal representative of the speed of each axle; means for generating a signal representative of an entered actual wheel size for a preselected one of said axles; means for computing speed adjust factors, for the respective axles from the entered actual wheel size, the base wheel sizes and the axle speeds; means for adjusting the respective axle speeds in accordance with the speed adjust factors and for applying the adjusted axle speeds to said spin/slide control for computation of differential axle speeds with wheel wear compensation; means for computing tractive effort adjust factors for the respective propulsion/braking units from the actual wheel size, the base wheel sizes and the axle speeds; and means for applying the tractive effort adjustment factors to said propulsion/braking control for computation and execution of tractive effort with wheel wear compensation. - View Dependent Claims (4, 5, 6, 7, 8, 9, 12, 13, 14, 15, 16)
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2. A control system for a steel wheel vehicle having at least two propulsion/braking units with each operating at least one axle, said system comprising:
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a propulsion/braking control generating current signals to operate the axle motor drives and generating braking signals to operate the associated braking system in accordance with command signals; a spin/slide control for adjusting said propulsion/braking control in accordance with differential axle speeds to avoid vehicular spins/slides; means for generating a signal representative of the speed of each axle; means for generating a signal representative of an entered actual wheel size for a preselected one of said axles; means for computing speed adjust factors for the respective axles from the entered actual wheel size, the base wheel sizes and the axle speeds; and means for adjusting the respective axle speeds in accordance with the speed adjust factors and for generating an indication of the wheel wear compensated vehicle speed from the adjusted axle speeds and for generating an indication of distance travelled from the calculated vehicle speed. - View Dependent Claims (10)
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3. A control system for a steel wheel vehicle having at least two propulsion/braking units with each operative with at least one axle, said system comprising:
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a propulsion/braking control generating current signals to operate the axle motor drives and generating braking signals to operate the associated braking system in accordance with command signals; a spin/slide control for adjusting said propulsion/braking control in accordance with differential axle speeds to avoid vehicular spins/slides; means for generating a signal representative of the speed of each axle; means for generating a signal representative of an entered actual wheel size for a preselected one of said axles; means for computing speed adjust factors for the respective axles from the entered actual wheel size, the base wheel sizes and the axle speeds; means for adjusting the respective axle speeds in accordance with the speed adjust factors and for applying the adjusted axle speeds to said spin/slide control for computation of differential axle speeds with wheel wear compensation; means for generating an indication of the wheel wear compensated vehicle speed from the adjusted axle speeds and for generating an indication of distance travelled from the calculated vehicle speed; means for computing tractive effort adjust factors for the respective propulsion/braking units from the actual wheel size, the base wheel sizes and the axle speeds; and means for applying the tractive effort adjustment factors to said propulsion/braking control for computation and execution of tractive effort with wheel wear compensation. - View Dependent Claims (11)
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Specification