VEHICLE VERIFICATION APPARATUS AND VEHICLE CONTROL SYSTEM USING THE SAME

• US 20090164059A1
• Filed: 12/22/2008
• Published: 06/25/2009
• Est. Priority Date: 12/20/2007
• Status: Abandoned Application

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: TAKEDA, Toshihiko
• Application Number:
  US12/341,178
• Publication Number:
  US 20090164059A1
• Time in Patent Office: Days
• US Class Current: 701/29
• CPC Class Codes: B60W 10/184 with wheel brakes
• CPC Class Codes: B60W 10/20 including control of steering systems
• CPC Class Codes: B60W 2050/021 Means for detecting failure or malfunction
• CPC Class Codes: B60W 30/02 Control of vehicle driving stability
• CPC Class Codes: B60W 30/18172 Preventing, or responsive to skidding of wheels
• CPC Class Codes: B60W 40/10 related to vehicle motion
• CPC Class Codes: B60W 40/12 related to parameters of the vehicle itself , e.g. tyre models
• CPC Class Codes: B60W 50/02 Ensuring safety in case of control system failures, e.g. by diagnosing, circumventing or fixing failures
• CPC Class Codes: B60W 50/04 Monitoring the functioning of the control system
• CPC Class Codes: B60W 50/08 Interaction between the driver and the control system
• CPC Class Codes: B62D 5/0481 monitoring the steering system, e.g. failures
• CPC Class Codes: B62D 5/0484 for reaction to failures, e.g. limp home
• CPC Class Codes: G07C 5/085 using electronic data carriers

Abstract

A verification apparatus is mounted in a vehicle, which is provided with targets to be controlled and a plurality of control units that control behaviors of the targets every functional domain of the vehicle, The verification apparatus comprises an acquisition unit and an verification unit. The acquisition unit acquires behavior information indicative of a behavior of a vehicle. The verification unit is provided independent of the control units. This verification unit uses the behavior information to verify correctness of the control of the behavior from the control units to the targets.

Claims

1. An verification apparatus mounted in a vehicle provided with targets to be controlled and a plurality of control units that control behaviors of the targets every functional domain of the vehicle, comprising:

an acquisition unit that acquires behavior information indicative of a behavior of a vehicle; and

an verification unit that is provided independent of the control units and that uses the behavior information to verify correctness of the control of the behavior from the control units to the targets.

2. The verification apparatus of claim 1, wherein the control units include a first control unit requiring higher safety in controlling the vehicle behavior and a second control unit which accepts lower safety in controlling the vehicle behavior,

the apparatus further comprising:

storage means that stores common information to the first and second control units and

limiting means that limits changes of the common information from the second control unit to the storage means.

3. The verification apparatus of claim 1, wherein at least part of the first control unit requiring the higher safety includes means for adjusting control parameter for the behavior control based on pieces of information supplied from the second control unit which accepts the lower safety.

4. The verification apparatus of claim 1, wherein the verification unit verifies the correctness of the behavior control directed to one of the targets from the control units.

5. The verification apparatus of claim 1, wherein the verification unit includes

request acquisition means for acquiring information that requests a given behavior of the vehicle,

behavior estimation means for estimating the vehicle behavior based on the request,

actual behavior detection means for detecting an actual behavior of the vehicle, and

determination means for determining whether or not the vehicle behavior is abnormal, by making a comparison between the estimated vehicle behavior and the detected actual behavior of the vehicle.

6. The verification apparatus of claim 5, wherein the behavior estimation means estimates the vehicle behavior based on a physical model that physically models the vehicle.

7. The verification apparatus of claim 5, wherein the behavior estimation means estimates the vehicle behavior based on a database showing an abnormal pattern of the behavior of the vehicle.

8. The verification apparatus of claim 5, wherein the verification unit includes

estimation means for estimating the vehicle behavior executed by, of the control units, a specific control unit that performs the behavior control having a possibility of causing abnormality in the vehicle behavior, when the determination means determines that the vehicle behavior is abnormal, and block means for blocking the behavior control executed by the specific control unit.

9. The verification apparatus of claim 8, wherein

the verification unit includes specification means for specifying the behavior control executed by the specific control unit, in more detail than the behavior control estimated by the estimation means, and

the block means blocks the behavior control specified by the specification means and returns the blocked behavior control based on the vehicle behavior estimated by the estimation means.

10. The verification apparatus of claim 8, wherein the verification unit includes

first determining means for determining whether or not part of the behavior control performed by the plurality of control units that control the behavior of one of the targets is blocked by the block means,

second determining means for determining whether or not it is possible to control the behavior of the one of the targets by using the behavior control of a remaining one of the control units which is irrelevant to blocked behavior control, when the first determining means determines that the part of the behavior control is blocked by the block means, and

parameter calculation means for calculating control parameters for behavior control that compensate the blocked behavior control, when the second determining means determines that It Is possible to control the behavior of the one of the targets.

11. The verification apparatus of claim 1, wherein a set of units composed of the acquisition unit and the verification unit is provided a plurality of sets of units, the plurality of sets of units being mounted in the vehicle separately from each other.

12. The verification apparatus of claim 11, wherein at least two sets of the plurality of sets of units are powered from redundant power source systems mounted in the vehicle and are formed to communicate through redundant communication systems mounted in the vehicle.

13. The verification apparatus of claim 11, wherein each of the plural verification units includes majority-decision determination means that uses both the correctness verified by the plural verification units including each verification unit itself and the behaviors of the targets controlled by the control units so as to determine that there occurs abnormality in other sets of the verification and control units.

14. The verification apparatus of claim 1, wherein the verification unit includes

determination means for determining that the vehicle behavior is abnormal and the behavior control performed by the control units is normal, and

adjustment means for adjusting the performance of the behavior control based on a priority order for the behavior control so that abnormality of the vehicle behavior is mitigated.

15. The verification apparatus of claim 14, wherein information in relation to the priority order is set in the control units.

16. The verification apparatus of claim 1, which is powered from a power source which is different from a further power source that powers the control units.

17. The verification apparatus of claim 1, further comprising an interface unit connected to a signal line different from a further signal line connected to the control units and formed to supply part of the behavior information to the acquisition unit.

18. The verification apparatus of claim 1, wherein the verification unit is composed of a processor different from processors composing the control units.

19. The verification apparatus of claim 1, wherein the verification unit uses an algorithm for estimating an amount of the vehicle behavior based on the behavior information and the control units use a further algorithm for calculating an amount of the behavior control given to the targets, the further algorithm being different from the algorithm used by the verification unit.

20. A control system for a vehicle provided with targets to be controlled, comprising:

a plurality of control units that control behaviors of the targets every functional domain of the vehicle;

an acquisition unit that acquires behavior information indicative of a behavior of a vehicle; and

a verification unit that is provided independent of the control units and that uses the behavior information to verify correctness of the control of the behavior from the control units to the targets.