Gear stage choosing apparatus, gear stage choosing method, and simulation apparatus

Patent metadata

Field	Value
Publication number	US-11536364-B2
Application number	US-202217672760-A
Country	US
Kind code	B2
Filing date	Feb 16, 2022
Priority date	Nov 14, 2019
Publication date	Dec 27, 2022
Grant date	Dec 27, 2022

Abstract

A simulation apparatus that generates a gradient pattern of a running road for a vehicle and a vehicle speed pattern for simulation. The apparatus includes a gradient pattern generation unit configured to generate a gradient pattern of a running road by sequentially deriving a gradient for each section, and a vehicle speed pattern generation unit configured to generate a vehicle speed pattern by, in a model including a lead vehicle that runs in accordance with a first vehicle speed pattern, a rearmost vehicle that runs in accordance with a first preceding vehicle following algorithm, and one or more intermediate vehicles that increase or reduce by one for each first period at an equal probability between the lead vehicle and the rearmost vehicle and that runs in accordance with the first preceding vehicle following algorithm, deriving a vehicle speed of the rearmost vehicle.

First claim

What is claimed is:

1. A simulation apparatus that generates a gradient pattern of a running road for a vehicle and a vehicle speed pattern for simulation, the simulation apparatus comprising:
one or more processors programmed to function as:
a gradient pattern generation unit configured to generate a gradient pattern of a running road by, in each of sections into which the running road is divided by a first distance, where a gradient obtained by increasing or reducing a gradient of the section by a first gradient at an equal probability, sequentially deriving a gradient for each section; and
a vehicle speed pattern generation unit configured to generate a vehicle speed pattern by, in a model including a lead vehicle that runs in accordance with a first vehicle speed pattern, a rearmost vehicle that runs in accordance with a first preceding vehicle following algorithm, and one or more intermediate vehicles that increase or reduce by one for each first period at an equal probability between the lead vehicle and the rearmost vehicle and that runs in accordance with the first preceding vehicle following algorithm, deriving a vehicle speed of the rearmost vehicle.

2. The simulation apparatus according to claim 1 , wherein the gradient is an angle that a running road forms with a horizontal plane.

3. The simulation apparatus according to claim 1 , wherein the gradient pattern generation unit initially sets a first gradient of a first section of the sections to a value greater than zero.

4. The simulation apparatus according to claim 3 , wherein the gradient pattern generation unit initially sets a probability of the first gradient to ½.

5. The simulation apparatus according to claim 3 , wherein the gradient pattern generation unit outputs the gradient pattern as an array of gradients for the sections derived by increasing or reducing gradients at an equal probability.

6. The simulation apparatus according to claim 1 , wherein the gradient pattern is a random pattern.

7. The simulation apparatus according to claim 1 , wherein multiple gradient patterns having a statistically same probability are generated.

8. The simulation apparatus according to claim 1 , wherein the first vehicle speed pattern is a predetermined vehicle speed temporal variation pattern.

9. The simulation apparatus according to claim 1 , wherein the one or more intermediate vehicles and the rearmost vehicle each run based on a different preceding vehicle following algorithm.

10. A simulation apparatus that generates a gradient pattern, the simulation apparatus comprising:
one or more processors programmed to function as:
a gradient pattern generation unit configured to generate a gradient, in each of sections into which a target of the gradient pattern is divided by a first distance, where a gradient obtained by increasing or reducing a gradient of the section by a first gradient at an equal probability, sequentially deriving a gradient for each section; and
a vehicle speed pattern generation unit configured to generate a vehicle speed pattern by, in a model including a lead vehicle that runs in accordance with a first vehicle speed pattern, a rearmost vehicle that runs in accordance with a first preceding vehicle following algorithm, and one or more intermediate vehicles that increase or reduce by one for each first period at an equal probability between the lead vehicle and the rearmost vehicle and that runs in accordance with the first preceding vehicle following algorithm, deriving a vehicle speed of the rearmost vehicle.

11. The simulation apparatus according to claim 10 , wherein the gradient pattern generation unit initially sets a first gradient of a first section of the sections to a value greater than zero.

12. The simulation apparatus according to claim 11 , wherein the gradient pattern generation unit initially sets a probability of the first gradient to ½.

13. The simulation apparatus according to claim 10 , wherein multiple gradient patterns having a statistically same probability are generated.

14. The simulation apparatus according to claim 10 , wherein the first vehicle speed pattern is a predetermined vehicle speed temporal variation pattern.

15. A simulation apparatus that generates a gradient pattern of a running road for a vehicle and a vehicle speed pattern for simulation, the simulation apparatus comprising:
one or more processors programmed to function as:
a gradient pattern generation unit configured to generate a gradient pattern of a running road by, in each of sections into which the running road is divided by a first distance, where a gradient obtained by increasing or reducing a gradient of the section by a first gradient at an equal probability, sequentially deriving a gradient for each section; and
a vehicle speed pattern generation unit configured to generate a vehicle speed pattern by, in a model including a first vehicle that runs in accordance with a first vehicle speed pattern, a second vehicle that runs in accordance with a first preceding vehicle following algorithm, and one or more third vehicles that increase or reduce by one for each first period at an equal probability between the first vehicle and the second vehicle and that runs in accordance with the first preceding vehicle following algorithm, deriving a vehicle speed of the second vehicle.

16. The simulation apparatus according to claim 15 , wherein the gradient is an angle that a running road forms with a horizontal plane.

17. The simulation apparatus according to claim 15 , wherein the gradient pattern generation unit initially sets a first gradient of a first section of the sections to a value greater than zero.

18. The simulation apparatus according to claim 17 , wherein the gradient pattern generation unit initially sets a probability of the first gradient to ½.

19. The simulation apparatus according to claim 15 , wherein multiple gradient patterns having a statistically same probability are generated.

20. The simulation apparatus according to claim 15 , wherein the first vehicle speed pattern is a predetermined vehicle speed temporal variation pattern.

Assignees

• Toyota Motor Co Ltd

Inventors

• Tokura Takaaki
• Kono Katsumi
• Yasuda Takeshi

Classifications

• F16H61/04

  Smoothing ratio shift · CPC title

• F16H2061/022

  Calculation or estimation of optimal gear ratio, e.g. best ratio for economy drive or performance according driver preference, or to optimise exhaust emissions · CPC title

• F16H2061/0071

  Robots or simulators for testing control functions in automatic transmission · CPC title

• F16H59/02 Primary

  Selector apparatus · CPC title

• F16H61/0213 Primary

  characterised by the method for generating shift signals · CPC title