Moving body, control device, and program

Patent metadata

Field	Value
Publication number	US-2024239208-A1
Application number	US-202418620236-A
Country	US
Kind code	A1
Filing date	Mar 28, 2024
Priority date	Sep 28, 2021
Publication date	Jul 18, 2024
Grant date	—

Abstract

This vehicle comprises a first dynamo-electric machine that imparts torque to a first drive wheel, a second dynamo-electric machine that applies torque to a second drive wheel, a rotation speed sensor that acquires a first rotation speed of the first drive wheel, a rotation speed sensor that acquires a second rotation speed of the second drive wheel, and a control device. The control device includes a basic setting unit that sets a basic rotation speed, a differential setting unit that sets a differential rotation speed, and an action control unit that controls the operation of the first dynamo-electric machine and the second dynamo-electric machine so that an average value of the first rotation speed and the second rotation speed becomes the basic rotation speed, and a difference between the first rotation speed and the second rotation speed reaches the differential rotation speed.

First claim

What is claimed is:

1 . A moving body comprising:
a first drive wheel disposed on a left side; a first dynamo-electric machine that imparts torque to the first drive wheel; a second drive wheel disposed on a right side; a second dynamo-electric machine that imparts torque to the second drive wheel; driven wheels that rotate due to a reaction force from a road surface, and which change a steering angle due to a reaction force from a road surface; a first rotation speed acquisition unit that acquires a first rotation speed, being the number of rotations the first drive wheel makes per unit time; a second rotation speed acquisition unit that acquires a second rotation speed, being the number of rotations the second drive wheel makes per unit time; and a control device that controls an operation of the first dynamo-electric machine and the second dynamo-electric machine,
wherein
the control device comprises:
a basic setting unit that sets a basic rotation speed, being a target value for an average value of the first rotation speed and the second rotation speed, a differential setting unit that sets a differential rotation speed, being a target
value for a difference between the first rotation speed and the second rotation speed, and
an action control unit that controls an operation of the first dynamo-electric machine and the second dynamo-electric machine such that an average value of the first rotation speed and the second rotation speed becomes the basic rotation speed, and a difference between the first rotation speed and the second rotation speed becomes the differential rotation speed.

2 . The moving body according to claim 1 , further comprising
an operation unit, which is a part in which an operation by a user is performed,
wherein
setting of the basic rotation speed by the basic setting unit, and setting of the differential rotation speed by the differential setting unit are performed based on an operation performed with respect to the operation unit.

3 . The moving body according to claim 1 , wherein
the basic setting unit sets the basic rotation speed within a predetermined first range.

4 . The moving body according to claim 1 , wherein
the basic setting unit changes the basic rotation speed such that an amount of change per unit time is within a predetermined second range.

5 . The moving body according to claim 1 , further comprising
a yaw rate sensor that measures a yaw rate,
wherein
the control device further comprises a yaw rate setting unit that sets a target yaw rate, which is a target value for the yaw rate and
the differential setting unit sets the differential rotation speed based on a difference between the target yaw rate and an actual yaw rate that has been measured by the yaw rate sensor.

6 . The moving body according to claim 1 , further comprising
a first adjustment mechanism that receives a first command value, being a command value for the first rotation speed, and adjusts a current supplied to the first dynamo-electric machine based on the first command value, and a second adjustment mechanism that receives a second command value, being a command value for the second rotation speed, and adjusts a current supplied to the second dynamo-electric machine based on the second command value,
wherein
the first adjustment mechanism is provided with the first dynamo-electric machine in a wheel of the first drive wheel, and
the second adjustment mechanism is provided with the second dynamo-electric machine in a wheel of the second drive wheel.

7 . A control device of a moving body, the moving body provided with a first drive wheel disposed on a left side,
a first dynamo-electric machine that imparts torque to the first drive wheel, a second drive wheel disposed on a right side, a second dynamo-electric machine that imparts torque to the second drive wheel, driven wheels that rotate due to a reaction force from a road surface, and which change a steering angle due to a reaction force from a road surface, a first rotation speed acquisition unit that acquires a first rotation speed, being the number of rotations the first drive wheel makes per unit time, and a second rotation speed acquisition unit that acquires a second rotation speed, being the number of rotations the second drive wheel makes per unit time, the control device comprising: a basic setting unit that sets a basic rotation speed, being a target value for an average value of the first rotation speed and the second rotation speed; a differential setting unit that sets a differential rotation speed, being a target value for a difference between the first rotation speed and the second rotation speed; and an action control unit that controls an operation of the first dynamo-electric machine and the second dynamo-electric machine such that an average value of the first rotation speed and the second rotation speed becomes the basic rotation speed, and a difference between the first rotation speed and the second rotation speed becomes the differential rotation speed.

8 . A program for a moving body, the moving body provided with
a first drive wheel disposed on a left side, a first dynamo-electric machine that imparts torque to the first drive wheel, a second drive wheel disposed on a right side, a second dynamo-electric machine that imparts torque to the second drive wheel, driven wheels that rotate due to a reaction force from a road surface, and which change a steering angle due to a reaction force from a road surface, a first rotation speed acquisition unit that acquires a first rotation speed, being the number of rotations the first drive wheel makes per unit time, a second rotation speed acquisition unit that acquires a second rotation speed, being the number of rotations the second drive wheel makes per unit time, and a control device that controls an operation of the first dynamo-electric machine and the second dynamo-electric machine; the program causing the control device to perform the steps of: setting a basic rotation speed, being a target value for an average value of the first rotation speed and the second rotation speed; setting a differential rotation speed, being a target value for a difference between the first rotation speed and the second rotation speed; and controlling an operation of the first dynamo-electric machine and the second dynamo-electric machine such that an average value of the first rotation speed and the second rotation speed becomes the basic rotation speed, and a difference between the first rotation speed and the second rotation speed becomes the differential rotation speed.

Assignees

• Denso Corp

Inventors

• Kamio Shigeru
• Liu Haibo
• Kawai Keisuke
• Takagi Tatsuya
• Akama Sadahiro
• Horihata Harumi
• Kubota Masaru
• Kuroyanagi Youichi

Classifications

• B60L2240/24

  Steering angle · CPC title

• B60L2200/24

  Personal mobility vehicles · CPC title

• B60L2200/22

  Microcars, e.g. golf cars · CPC title

• B60L2240/22

  Yaw angle · CPC title

• B60L15/2036 Primary

  Electric differentials, e.g. for supporting steering vehicles · CPC title