Vehicle and autonomous driving kit
A vehicle includes an ADK attachable to and removable from a vehicle main body, the ADK issuing an instruction for autonomous driving, a VP including a plurality of functional units that perform a plurality of prescribed functions of the vehicle main body, and a VCIB that issues a control instruction to the functional units in accordance with an instruction from the ADK. One of the plurality of functional units is a steering system that steers the vehicle main body. The steering system specifies a limit value of a steering rate in accordance with a prescribed reference and transmits the specified limit value to the ADK through the VCIB. The ADK calculates a target steering angle to satisfy the limit value received from the steering system and transmits an instruction for the calculated steering angle to the steering system through the VCIB.
1. A vehicle capable of autonomous driving, the vehicle comprising:
an autonomous driving kit attachable to and removable from the vehicle, the autonomous driving kit issuing an instruction for autonomous driving;
a vehicle platform including a plurality of functional units that perform a plurality of prescribed functions of the vehicle; and
a vehicle interface box that communicates with the autonomous driving kit and issues a control instruction to the functional units in accordance with an instruction from the autonomous driving kit, the autonomous driving kit being connected to the vehicle platform via the vehicle interface box by a controller area network (CAN), wherein
one of the plurality of functional units is a steering system that steers the vehicle,
the steering system
specifies a limit value of a steering rate in accordance with a prescribed reference, and
transmits the specified limit value to the autonomous driving kit through the vehicle interface box, and
the autonomous driving kit
calculates a target steering angle to satisfy the limit value received from the steering system, and
transmits an instruction for the calculated steering angle to the steering system through the vehicle interface box.
2. The vehicle according to claim 1 , wherein
the steering system switches the prescribed reference in accordance with a vehicle speed.
3. The vehicle according to claim 2 , wherein
the prescribed reference is a reference that the limit value of the steering rate is defined as a prescribed angular velocity when the vehicle speed is lower than a prescribed speed.
4. The vehicle according to claim 3 , wherein
a value of the prescribed angular velocity is 0.4 rad/s.
5. The vehicle according to claim 2 , wherein
the prescribed reference is a reference that, when the vehicle speed exceeds a prescribed speed, the limit value of the steering rate satisfies predetermined relation between the vehicle speed and the limit value of the steering rate.
6. The vehicle according to claim 5 , wherein
a value of the prescribed speed is 10 km/h.
7. The vehicle according to claim 2 , wherein
the prescribed reference is a reference determined in advance to set a lateral jerk of the vehicle to be lower than a prescribed jerk.
8. The vehicle according to claim 7 , wherein
a value of the prescribed jerk is 2.94 m/s3.
9. An autonomous driving kit that is attachable to and removable from a vehicle and issues an instruction for autonomous driving of the vehicle, the vehicle including a plurality of functional units that perform a plurality of prescribed functions of the vehicle, the functional units being controlled in accordance with an instruction from the autonomous driving kit, one of the plurality of functional units being a steering system that steers the vehicle, the autonomous driving kit being connected to the vehicle via a controller area network (CAN), wherein the autonomous driving kit is configured to
calculate a target steering angle to satisfy a limit value of a steering rate specified by the steering system in accordance with a prescribed reference, and
transmit an instruction for the calculated steering angle to the steering system.
10. The autonomous driving kit according to claim 9 , wherein
the steering system switches the prescribed reference in accordance with a vehicle speed.
11. The autonomous driving kit according to claim 10 , wherein
the prescribed reference is a reference that the limit value of the steering rate is defined as a prescribed angular velocity when the vehicle speed is lower than a prescribed speed.
12. The autonomous driving kit according to claim 11 , wherein
a value of the prescribed angular velocity is 0.4 rad/s.
13. The autonomous driving kit according to claim 10 , wherein
the prescribed reference is a reference that, when the vehicle speed exceeds a prescribed speed, the limit value of the steering rate satisfies predetermined relation between the vehicle speed and the limit value of the steering rate.
14. The autonomous driving kit according to claim 10 , wherein
the prescribed reference is a reference determined in advance to set a lateral jerk of the vehicle to be lower than a prescribed jerk.
15. A vehicle capable of autonomous driving, the vehicle comprising:
a vehicle platform including a plurality of functional units that perform a plurality of prescribed functions of the vehicle; and
a vehicle interface box, the vehicle interface box communicating with an autonomous driving kit that issues an instruction for autonomous driving and is attachable to and removable from the vehicle, the vehicle interface box issuing a control instruction to the functional units in accordance with an instruction from the autonomous driving kit, the autonomous driving kit being connected to the vehicle platform via the vehicle interface box by a controller area network (CAN), wherein
one of the plurality of functional units is a steering system that steers the vehicle,
the steering system
specifies a limit value of a steering rate in accordance with a prescribed reference,
transmits the specified limit value to the autonomous driving kit through the vehicle interface box, and
controls a steering angle in accordance with an instruction for a target steering angle calculated by the autonomous driving kit to satisfy the limit value received from the steering system.
16. The vehicle according to claim 15 , wherein
the steering system switches the prescribed reference in accordance with a vehicle speed.
17. The vehicle according to claim 16 , wherein
the prescribed reference is a reference that the limit value of the steering rate is defined as a prescribed angular velocity when the vehicle speed is lower than a prescribed speed.
18. The vehicle according to claim 17 , wherein
a value of the prescribed angular velocity is 0.4 rad/s.
19. The vehicle according to claim 16 , wherein
the prescribed reference is a reference that, when the vehicle speed exceeds a prescribed speed, the limit value of the steering rate satisfies predetermined relation between the vehicle speed and the limit value of the steering rate.
20. The vehicle according to claim 16 , wherein
the prescribed reference is a reference determined in advance to set a lateral jerk of the vehicle to be lower than a prescribed jerk.