SYSTEM AND METHOD FOR VEHICLE CONGESTION ESTIMATION
First Claim
1. A computer-implemented method for controlling a host vehicle in relation to a leading vehicle, and a preceding vehicle, wherein the host vehicle, the leading vehicle, and the preceding vehicle are within a platoon of vehicles, comprising:
- receiving speed data of the leading vehicle from the leading vehicle via a vehicle communication network, wherein the leading vehicle is positioned ahead of the host vehicle and the preceding vehicle;
receiving speed data of the preceding vehicle from a sensor system of the host vehicle, wherein the preceding vehicle is positioned immediately ahead of the host vehicle;
calculating a transfer function between the leading vehicle and the host vehicle as a correlation between the speed data of the leading vehicle and the speed data of the preceding vehicle;
determining a string stability level of the platoon of vehicles based on the transfer function, wherein the string stability level indicates a speed variation of the platoon of vehicles;
calculating a traffic congestion level based on the string stability level; and
controlling a vehicle system of the host vehicle based on the traffic congestion level.
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Abstract
A system and method for controlling a host vehicle in a platoon of vehicles. The method includes receiving speed data of a leading vehicle from the leading vehicle via a vehicle communication network, and receiving speed data of a preceding vehicle from a sensor system of the host vehicle. The preceding vehicle is positioned immediately ahead of the host vehicle. The leading vehicle is positioned ahead of the host vehicle and the preceding vehicle. The method includes calculating a transfer function between the leading vehicle and the host vehicle and determining a string stability level of the platoon of vehicles based on the transfer function. The string stability level indicates a speed variation of the platoon of vehicles. Further, the method includes calculating a traffic congestion level based on the string stability level, and controlling a vehicle system of the host vehicle based on the traffic congestion level.
35 Citations
20 Claims
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1. A computer-implemented method for controlling a host vehicle in relation to a leading vehicle, and a preceding vehicle, wherein the host vehicle, the leading vehicle, and the preceding vehicle are within a platoon of vehicles, comprising:
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receiving speed data of the leading vehicle from the leading vehicle via a vehicle communication network, wherein the leading vehicle is positioned ahead of the host vehicle and the preceding vehicle; receiving speed data of the preceding vehicle from a sensor system of the host vehicle, wherein the preceding vehicle is positioned immediately ahead of the host vehicle; calculating a transfer function between the leading vehicle and the host vehicle as a correlation between the speed data of the leading vehicle and the speed data of the preceding vehicle; determining a string stability level of the platoon of vehicles based on the transfer function, wherein the string stability level indicates a speed variation of the platoon of vehicles; calculating a traffic congestion level based on the string stability level; and controlling a vehicle system of the host vehicle based on the traffic congestion level. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A vehicle control system for controlling a host vehicle in relation to a leading vehicle, and a preceding vehicle, wherein the host vehicle, the leading vehicle, and the preceding vehicle are within a platoon of vehicles, comprising:
a wireless transceiver of the host vehicle to receive speed data of the leading vehicle from the leading vehicle via a vehicle communication network, wherein the leading vehicle is positioned ahead of the host vehicle and the preceding vehicle; a sensor system of the host vehicle for sensing speed data of the preceding vehicle, wherein the preceding vehicle is positioned immediately ahead of the host vehicle; and a processor operatively connected for computer communication to the sensor system and the wireless transceiver, wherein the processor; calculates a transfer function between the leading vehicle and the host vehicle as a ratio between an input of the leading vehicle and an output of the preceding vehicle, wherein the input of the leading vehicle is based on the speed data of the leading vehicle and the output of the preceding vehicle is based on the speed data of the preceding vehicle; determines a string stability level based on the transfer function over a period of time; calculates a traffic congestion level based on the string stability level; and controls the host vehicle based on the traffic congestion level. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A non-transitory computer-readable storage medium for controlling a host vehicle in relation to a leading vehicle, and a preceding vehicle, wherein the host vehicle, the leading vehicle, and the preceding vehicle are within a platoon of vehicles, including instructions that when executed by a processor, cause the processor to:
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receive speed data of the leading vehicle from the leading vehicle via a vehicle communication network, wherein the leading vehicle is positioned ahead of the host vehicle and the preceding vehicle; receive speed data of the preceding vehicle from a sensor system of the host vehicle, wherein the preceding vehicle is positioned immediately ahead of the host vehicle; calculate a transfer function between the leading vehicle and the host vehicle as a correlation between the speed data of the leading vehicle and the speed data of the preceding vehicle; determine a string stability level of the platoon of vehicles based on the transfer function, wherein the string stability level indicates a speed variation of the platoon of vehicles; calculate a traffic congestion level based on the string stability level; and control a vehicle system of the host vehicle based on the traffic congestion level. - View Dependent Claims (17, 18, 19, 20)
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Specification