System and method for transforming data between the time domain and the combustion pulse domain

• US 20100004901A1
• Filed: 07/03/2008
• Published: 01/07/2010
• Est. Priority Date: 07/03/2008
• Status: Active Grant

• Current Assignee: Caterpillar Incorporated
• Original Assignee: Caterpillar Incorporated
• Inventors: Jayachandran, Amit, Grichnik, Anthony J., Wynkoop, Christopher L., Felty, Timothy J., Mason, James R., Kesse, Mary Lou
• Granted Patent: US 8,185,359 B2
• Time in Patent Office: Days
• US Class Current: 702/198
• CPC Class Codes: G01M 15/02 Details or accessories of testing apparatus

Abstract

A method for transforming machine sensor data between a time domain and a combustion pulse domain is disclosed. The method may include determining a number of pulse events per rotation of a shaft and determining a sampling rate per pulse event. The method may also include sampling one or more sensors at the sampling rate per pulse event. The method also may include transforming the samples into the combustion pulse domain.

Claims

1. A method for transforming machine sensor data between a time domain and a combustion pulse domain, comprising:

determining a number of pulse events per rotation of a shaft;

determining a sampling rate per pulse event;

sampling one or more sensors at the sampling rate per pulse event; and

transforming the samples into the combustion pulse domain.

2. The method according to claim 1, further including modeling a process in the combustion pulse domain based on the samples transformed into the combustion pulse domain.

3. The method according to claim 2, further including:

transforming outputs of the modeled process into the time domain; and

providing outputs to a controller.

4. The method according to claim 3, wherein transforming outputs of the modeled process into the time domain includes adjusting the output in the time domain to account for a speed at which airborne emissions travel through an exhaust system based on the pulse event rate per rotation of the shaft.

5. The method according to claim 2, wherein modeling the process includes producing an output that includes virtual sensor data.

6. The method according to claim 5, wherein the virtual sensor data include virtual sensor data on airborne emissions in an internal combustion engine.

7. The method according to claim 1, wherein the sampling rate per pulse event includes at least ten samples per pulse event.

8. A system for a machine including an engine with a rotary shaft, the system configured to transform machine sensor data between a time domain and a combustion pulse domain, comprising:

a sensor deployed on the machine;

an input interface configured to obtain data from the sensor deployed on the machine;

an output interface configured to provide data to a control system; and

a controller configured to;

determine a number of pulse events per rotation of the rotary shaft;

determine a sampling rate per pulse event;

sample one or more sensors at the sampling rate per pulse event; and

transform the samples into the combustion pulse domain.

9. The system according to claim 8, wherein the controller is further configured to model a process in the combustion pulse domain based on the samples transformed into the combustion pulse domain.

10. The system according to claim 9, wherein the controller is further configured to:

transform outputs of the modeled process into the time domain; and

provide outputs to the controller.

11. The system according to claim 10, wherein the controller is further configured to adjust the output in the time domain to account for a speed at which airborne emissions travel through an exhaust system based on the pulse event rate per rotation of the shaft.

12. The system according to claim 9, wherein outputs of the modeled process include virtual sensor data.

13. The system according to claim 12, wherein the virtual sensor data include virtual sensor data on airborne emissions in an internal combustion engine.

14. The system according to claim 8, wherein the sampling rate per pulse event includes at least ten samples per pulse event.

15. A machine, comprising:

an engine with a rotating shaft configured to provide power for the machine;

an engine electronic control module (ECM) configured to control the engine;

a plurality of physical sensors configured to provide sensing data to the engine ECM;

an input interface configured to obtain data from the plurality of physical sensors deployed on the machine;

an output interface configured to provide data to a control system; and

a controller configured to;

determine a number of pulse events per rotation of a shaft;

determine a sampling rate per pulse event;

sample one or more of the physical sensors at the sampling rate per pulse event; and

transform the samples into a combustion pulse domain.

16. The machine according to claim 15, wherein the controller is further configured to model a process in the combustion pulse domain based on the samples transformed into the combustion pulse domain.

17. The machine according to claim 16, wherein the controller is further configured to:

transform outputs of the modeled process into a time domain; and

provide outputs to the ECM.

18. The machine according to claim 17, wherein the controller is further configured to adjust the output in the time domain to account for a speed at which airborne emissions travels through an exhaust system based on the pulse event rate per rotation of the shaft.

19. The machine according to claim 16, wherein the output of the modeled process includes virtual sensor data on airborne emissions in an internal combustion engine.

20. The machine according to claim 15, wherein the sampling rate per pulse event includes at least ten samples per pulse event.