DYNAMIC SERVICE INTERVAL SCHEDULING FOR MACHINE
Dynamic service interval scheduling in a machine includes receiving monitoring signals for a plurality of components in the machine each indicative of an operating characteristic upon which a state-of-health (SOH) of one of the plurality of components is dependent. An SOH term is calculated for each one of the components based on the monitoring signals and a stored SOH degradation progression profile. SOH reporting signals are outputted based on a respective one of the SOH terms. The reporting signals may indicate a plurality of different continued service capacities among the components at least some of which are runtime-independent of one or more components in a drive system in the machine. Related apparatus and control logic is also disclosed.
1 . A method for dynamic service interval scheduling in an electric-drive machine comprising:
receiving a plurality of monitoring signals, for a plurality of components in an electric-drive machine, and each being indicative of an operating characteristic upon which a state-of-health (SOH) of a respective one of the plurality of components is dependent;
calculating an SOH term for each one of the plurality of components based on the plurality of monitoring signals and a plurality of stored SOH degradation progression profiles for each respective one of the plurality of components; and
outputting a plurality of SOH reporting signals each based on a respective one of the SOH terms and being indicative of a plurality of different continued service capacities among the plurality of components.
2 . The method of claim 1 further comprising tracking a runtime associated with the electric-drive machine, and at least one of the operating characteristics is runtime-independent.
3 . The method of claim 1 wherein each of the operating characteristics includes a cycle number characteristic, a temperature characteristic, a thermal loading characteristic, a mechanical loading characteristic, an energy characteristic, or a chemical degradation characteristic
4 . The method of claim 3 wherein each of the stored SOH degradation progression profiles is based on at least one of, a cycle number criterion, a fatigue criterion, a thermal loading criterion, an energy criterion, or a chemical degradation criterion.
5 . The method of claim 3 wherein:
the plurality of components includes an electric traction motor associated with a thermal loading operating characteristic, and an electric power device associated with a chemical degradation operating characteristic; and
the calculating an SOH term includes calculating an SOH term for the electric traction motor via a stored thermal fatigue model, and calculating an SOH term for the electric power device via a stored chemical degradation model.
6 . The method of claim 1 wherein each one of the plurality of different continued service capacities is at least one of time-based, cycle number-based, wear-based, or consumption-based.
7 . The method of claim 6 further comprising producing on a display a graphical representation of the plurality of different continued service capacities.
8 . The method of claim 6 further comprising outputting a service interval scheduling signal based on at least one of the plurality of SOH reporting signals.
9 . The method of claim 8 wherein the service interval scheduling signal is indicative of a scheduled service timing that is based on two or more of the different continued service capacities.
10 . An electric-drive machine comprising:
a frame;
ground-engaging elements coupled to the frame;
a plurality of components including an electric traction motor coupled to at least one of the ground-engaging elements, and an electric power device;
a service interval scheduling system including a plurality of sensors, and a system controller structured to:
receive, at least in part from one or more of the plurality of sensors, a plurality of monitoring signals each being indicative of an operating characteristic upon which a state of health (SOH) of a respective one of the plurality of components is dependent;
calculate an SOH term for each one of the plurality of components based on the plurality of monitoring signals and a plurality of stored SOH degradation progression profiles for each respective one of the plurality of components; and
output a plurality of SOH reporting signals each based on a respective one of the SOH terms and being indicative of a plurality of different continued service capacities among the plurality of components.
11 . The electric-drive machine of claim 10 wherein the operating characteristics include a thermal loading characteristic upon which the SOH of the electric traction motor is dependent, and a chemical degradation characteristic upon which the SOH of the electric power device is dependent.
12 . The electric-drive machine of claim 11 wherein the stored SOH degradation progression profile for the electric traction motor includes a stored thermal fatigue model, and the stored SOH degradation progression profile for the electric power device includes a stored chemical degradation model.
13 . The electric-drive machine of claim 10 further comprising a display, and the system controller is further structured to produce on the display a graphical representation of the plurality of different continued service capacities.
14 . The electric-drive machine of claim 13 wherein each of the plurality of different continued service capacities is at least one of time-based, cycle number-based, wear-based, or consumption-based.
15 . The electric-drive machine of claim 10 wherein the system controller is further structured to output a service interval scheduling signal indicative of a scheduled service timing that is based on two or more of the different capacities for continued service.
16 . The electric-drive machine of claim 10 including an off-highway truck.
17 . A system for service interval scheduling in an electric-drive machine comprising:
a system controller structured to:
receive via a state-of-health (SOH) monitoring module a plurality of monitoring signals each being indicative of an operating characteristic upon which an SOH of a respective one of a plurality of components in an electric-drive machine is dependent;
calculate an SOH term for each one of the plurality of components based on the plurality of monitoring signals and a plurality of stored SOH degradation progression profiles for each respective one of the plurality of components; and
output to a service interval scheduling module a plurality of SOH reporting signals each based on a respective one of the SOH terms and being indicative of a plurality of different continued service capacities among the plurality of components.
18 . The system of claim 17 further comprising a computer readable memory storing the plurality of SOH degradation progression profiles, and each of the stored SOH degradation progression profiles is based on at least one of a cycle number criterion, a fatigue criterion, a thermal loading criterion, an energy criterion, or a chemical degradation criterion.
19 . The system of claim 18 wherein the system controller is further structured to calculate the SOH term for at least one of the plurality of components via a stored fatigue model.
20 . The system of claim 19 wherein the electric-drive machine includes an electric drive system, and the operating characteristic of at least one of the components is runtime-independent of the electric drive system.