Speed decoding and speed error determining control apparatus and method
First Claim
1. In apparatus for determining the movement of a passenger vehicle moving along a track and in response to a track provided input velocity signal including zeros data and ones data, the combination ofmeans for determining the vehicle actual speed,first signal means for providing a first speed signal in accordance with a first decoding of the zeros data and providing a second speed signal in accordance with a first decoding of the ones data,second signal means for providing a third speed signal in accordance with a second decoding of the zeros data and providing a fourth speed signal in accordance with a second decoding of the ones data,means operative with at least one of said first and second signal means for determining a speed command for said vehicle,means for determining a first speed error signal in response to said first speed signal and second speed signal in relation to said actual speed,means for determining a second speed error signal in response to said third speed signal and said fourth speed signal in relation to said actual speed, andmeans for comparing the first speed error signal and the second speed error signal to determine one of the movement of the vehicle in response to said speed command or the stopping of the vehicle.
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Abstract
A speed decoding and error determining control apparatus and method are disclosed, including two independently programmed microprocessors responsive to a desired speed command from the wayside for determining respective speed errors for a coupled passenger vehicle, which speed errors must compare within a predetermined tolerance before the speed command is permitted to control the actual speed of the passenger vehicle.
28 Citations
14 Claims
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1. In apparatus for determining the movement of a passenger vehicle moving along a track and in response to a track provided input velocity signal including zeros data and ones data, the combination of
means for determining the vehicle actual speed, first signal means for providing a first speed signal in accordance with a first decoding of the zeros data and providing a second speed signal in accordance with a first decoding of the ones data, second signal means for providing a third speed signal in accordance with a second decoding of the zeros data and providing a fourth speed signal in accordance with a second decoding of the ones data, means operative with at least one of said first and second signal means for determining a speed command for said vehicle, means for determining a first speed error signal in response to said first speed signal and second speed signal in relation to said actual speed, means for determining a second speed error signal in response to said third speed signal and said fourth speed signal in relation to said actual speed, and means for comparing the first speed error signal and the second speed error signal to determine one of the movement of the vehicle in response to said speed command or the stopping of the vehicle.
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12. The method of determining the movement speed of a vehicle by decoding an input speed control signal including zeros data and ones data, said method including the steps of
determining the actual speed of the vehicle, providing a first speed signal by a first decoding of the zeros data and a first decoding of the ones data, providing a second speed signal by a second decoding of the zeros data and a second decoding of the ones data, providing a first speed error signal in response to the first speed signal and in relation to said actual speed, providing a second speed error signal in response to the second speed signal and in relation to said actual speed, and providing a vehicle speed control signal in response to each of said first speed error signal and said second speed error signal for determining the actual movement speed of the vehicle.
Specification