System-level malfunction indicator in autonomous vehicles
Devices, systems and methods for using system-level malfunction indicators to monitor the operation and resiliency of the autonomous driving system components are described. One example of a method for diagnosing a fault in a component of an autonomous vehicle includes receiving, from an electrical sub-component of the component, an electrical signal, receiving, from an electronic sub-component of the component, a message, and determining, based on the electrical signal and the message, an operational status of the component.
1. A fault diagnostic method, comprising:
receiving an electrical signal from a first component located in a vehicle, wherein the electrical signal includes a transient signal of a voltage signal or a current signal of the electrical signal;
receiving a first message from a second component located in the vehicle, wherein the first message includes an error message; and
determining an operational status of a third component that includes the first component and the second component, wherein the operational status is determined based on the transient signal of the voltage signal or the current signal and based on the error message in the first message,
wherein the operational status of the third component is determined based on a tradeoff between a severity of the error message and a plurality of characteristics of the transient signal of the voltage signal or the current signal, and
wherein the plurality of characteristics of the transient signal includes a number of transients of the transient signal and magnitude of the transient signal.
2. The fault diagnostic method of claim 1 , wherein the plurality of characteristics of the transient signal includes a periodicity of the transient signal.
3. The fault diagnostic method of claim 1 , wherein the operational status is determined to be faulty in response to the error message including a fatal status indicating a fatal condition irrespective of a presence of the transient signal.
4. The fault diagnostic method of claim 1 , wherein the operational status is determined to not be faulty in response to the error message including a warning status and in response to the transient signal including solitary transients.
5. The fault diagnostic method of claim 1 , wherein the first message includes a vehicle status message that includes a first field that indicates whether the vehicle is running or has stopped using one-bit.
6. A fault diagnostic apparatus, comprising:
a processor; and
a memory with instructions thereon, wherein the instructions upon execution by the processor cause the processor to:
receive an electrical signal from a first component located in a vehicle, wherein the electrical signal includes a transient signal of a voltage signal or a current signal of the electrical signal;
receive a first message from a second component located in the vehicle, wherein the first message includes an error message; and
determine an operational status of a third component that includes the first component and the second component, wherein the operational status is determined based on the transient signal of the voltage signal or the current signal and based on the error message in the first message,
wherein the operational status of the third component is determined based on a tradeoff between a severity of the error message and a plurality of characteristics of the transient signal of the voltage signal or the current signal, and
wherein the plurality of characteristics of the transient signal includes a number of transients of the transient signal and magnitude of the transient signal.
7. The fault diagnostic apparatus of claim 6 , wherein the plurality of characteristics of the transient signal includes a periodicity of the transient signal.
8. The fault diagnostic apparatus of claim 6 , wherein the operational status is determined to be faulty in response to the error message including a fatal status indicating a fatal condition irrespective of a presence of the transient signal.
9. The fault diagnostic apparatus of claim 6 , wherein the operational status is determined to not be faulty in response to the error message including a warning status and in response to the transient signal including solitary transients.
10. The fault diagnostic apparatus of claim 6 , wherein the first message includes a vehicle status message that includes a first field that indicates whether the vehicle is running or has stopped using one-bit.
11. A non-transitory computer readable storage medium having instructions stored thereupon, the instructions, when executed by a processor, causing the processor to implement a method, the method comprising:
receiving an electrical signal from a first component located in a vehicle, wherein the electrical signal includes a transient signal of a voltage signal or a current signal of the electrical signal;
receiving a first message from a second component located in the vehicle, wherein the first message includes an error message; and
determining an operational status of a third component that includes the first component and the second component, wherein the operational status is determined based on the transient signal of the voltage signal or the current signal and based on the error message in the first message,
wherein the operational status of the third component is determined based on a tradeoff between a severity of the error message and a plurality of characteristics of the transient signal of the voltage signal or the current signal, and
wherein the plurality of characteristics of the transient signal includes a number of transients of the transient signal and magnitude of the transient signal.
12. The non-transitory computer readable storage medium of claim 11 , wherein the plurality of characteristics of the transient signal includes a periodicity of the transient signal.
13. The non-transitory computer readable storage medium of claim 11 , wherein the operational status is determined to be faulty in response to the error message including a fatal status indicating a fatal condition irrespective of a presence of the transient signal.
14. The non-transitory computer readable storage medium of claim 11 , wherein the operational status is determined to not be faulty in response to the error message including a warning status and in response to the transient signal including solitary transients.
15. The non-transitory computer readable storage medium of claim 11 , wherein the first message includes a vehicle status message that includes a first field that indicates whether the vehicle is running or has stopped using one-bit.