Steering control device and steering assist system including same

1. A steering control device for controlling an output-side actuator mechanically separated from an input-side actuator comprising:

a first controller connected to an output-side steering control device through at least one first communication bus; and

an input-side steering control device comprising a second controller connected to the output-side steering control device through at least one second communication bus and connected to the first controller through at least one third communication bus,

wherein at least one of the first controller and the second controller is configured to,

determine whether at least one communication bus connected to the output-side steering control device fails,

output a control signal to the output-side steering control device through a communication bus in a normal state based on a determination result, and

output, if the at least one first communication bus fails, the control signal to the output-side steering control device through a communication path according to the third communication bus and the second communication bus.

2. The steering control device of claim 1 , wherein the first communication bus is one, and the first controller outputs, if the one first communication bus fails, the control signal to the output-side steering control device through the communication path according to the third communication bus and the second communication bus.

3. The steering control device of claim 1 , wherein the first communication bus is plural, and the first controller outputs, if a failure of a first communication bus among the plurality of first communication buses exists, the control signal to the output-side steering control device through a first communication bus in a normal state.

4. The steering control device of claim 3 , wherein the first controller outputs, if all of the plurality of first communication buses fail, the control signal to the output-side steering control device through the communication path according to the third communication bus and the second communication bus.

5. The steering control device of claim 1 , wherein the first communication bus comprises a first main communication bus preferentially used and a first sub communication bus used when the first main communication bus fails, and

the first controller outputs the control signal to the output-side steering control device through the first sub communication bus 312 if the first main communication bus fails, and outputs the control signal to the output-side steering control device through the first main communication bus if the first main communication bus is in a normal state.

6. The steering control device of claim 5 , wherein the first controller outputs, if the first main communication bus and the first sub communication bus fail, the control signal to the output-side steering control device through the communication path according to the third communication bus and the second communication bus.

7. The steering control device of claim 1 , wherein the first controller determines whether the first controller fails, and transfers a control right to the output-side steering control device to the second controller based on a determination result, and the second controller performs an operation of controlling the output-side steering control device when the control right is transferred.

8. The steering control device of claim 7 , wherein the first controller outputs the control signal to the output-side steering control device through the third communication bus and the second communication bus if the first controller is in a normal state and the first communication bus fails, and transfers the control right to the second controller if the first controller fails.

9. The steering control device of claim 1 , further comprising the output-side steering control device which controls the output-side actuator and comprises a third controller and a fourth controller,

wherein the third controller is connected to the first controller through the at least one first communication bus, and

the fourth controller is connected to the second controller through the at least one second communication bus, and is connected to the third controller through at least one fourth communication bus.

10. A steering control device for controlling an output-side actuator mechanically separated from an input-side actuator comprising:

a first controller connected to an output-side steering control device and a second controller through a first communication bus; and

an input-side steering control device comprising the second controller connected to the output-side steering control device and the first controller through a second communication bus,

wherein at least one of the first controller and the second controller is configured to,

determine whether any one of the first communication bus and the second communication bus fails, and

output a control signal to the output-side steering control device through a communication bus in a normal state based on a determination result.

11. The steering control device of claim 10 , wherein the first communication bus is a main communication bus preferentially used over the second communication bus, and

the first controller is configured to,

determine whether the first communication bus fails, and if the first communication bus fails, outputs the control signal to the output-side steering control device through the second communication bus, and

outputs, if the first communication bus does not fail, the control signal to the output-side steering control device through the first communication bus.

12. The steering control device of claim 10 , wherein the first controller determines whether the first controller fails, and transfers a control right to the output-side steering control device to the second controller based on a determination result, and the second controller performs an operation of controlling the output-side steering control device when the control right is transferred.

13. The steering control device of claim 10 , further comprising the output-side steering control device which controls the output-side actuator and comprises a third controller and a fourth controller,

wherein the third controller is connected to the first controller, the second controller and the fourth controller through the first communication bus, and

the fourth controller is connected to the first controller, the second controller and the third controller through the second communication bus.

14. A steering assistance system comprising:

an input-side steering control device for controlling an input-side actuator;

an output-side steering control device for controlling an output-side actuator; and

at least one public communication bus for connecting the input-side actuator, the output-side actuator, the input-side steering control device and the output-side steering control device,

wherein the input-side steering control device comprises,

a first controller connected to the output-side steering control device through the public communication bus and connected to a second controller through a first communication bus, and

a second controller connected to the first controller through the first communication bus and connected to the output-side steering control device through the public communication bus.

15. The steering assistance system of claim 14 , wherein the first controller is connected to the output-side steering control device through a third communication bus, and

the first controller is configured to,

determine whether the third communication bus fails, and output a control signal to the output-side steering control device through at least one of the third communication bus and the public communication bus in a normal state based on a determination result, and

output the control signal to the output-side steering control device through the public communication bus if the third communication bus fails, and output the control signal to the output-side steering control device through the third communication bus if the third communication bus is in the normal state.

16. The steering assistance system of claim 15 , wherein the public communication bus comprises a first public communication bus connected to the first controller and a second public communication bus connected to the second controller, and

the first controller outputs the control signal to the output-side steering control device through at least one of the first public communication bus and the second public communication bus if the first communication bus fails.

17. The steering assistance system of claim 15 , wherein the first controller determines whether the first controller fails, and transfers a control right to the output-side steering control device to the second controller based on a determination result, and the second controller performs an operation of controlling the output-side steering control device when the control right is transferred.

18. The steering assistance system of claim 17 , wherein the first controller outputs the control signal to the output-side steering device through the public communication bus if the first controller is in a normal state and the first communication bus fails, and transfers the control right to the second controller if the first controller fails.

19. The steering assistance system of claim 14 , wherein the output-side steering control device comprises:

a third controller connected to the first controller through the public communication bus and connected to a fourth controller through the second communication bus; and

the fourth controller connected to the second controller through the public communication bus and connected to the third controller through the second communication bus.

20. The steering assistance system of claim 19 , wherein the public communication bus comprises a first public communication bus connected to the first controller and the third controller, and a second public communication bus connected to the second controller and the fourth controller,

wherein the first controller outputs a status check signal to the second controller to determine whether the second controller fails, and outputs, if the first communication bus fails, the status check signal to the second controller through the first public communication bus.