Systems and methods for blower control

1. A system comprising: at least one processor configured to be operably coupled to at least a blower and at least a blower sensor, the at least one processor configured to:

determine an operational-based power using blower operational information obtained by the blower sensor, the blower operational information representing functioning of the blower and including a power consumed by the blower and one or more of voltage, current, shaft torque, or shaft rotational speed;

determine an operational-based air density using the operational-based power, wherein the operational-based air density is an estimate of density of air used by the blower and determined using the operational-based power; and

control the blower using the operational-based air density.

2. The system of claim 1 , wherein the at least one processor is operably coupled to a pressure sensor and a temperature sensor, the at least one processor configured to determine a sensor-based air density based on ambient pressure information obtained by the pressure sensor and ambient temperature information obtained by the temperature sensor, the at least one processor configured to compare the sensor-based air density with the operational-based air density.

3. The system of claim 2 , wherein the at least one processor is configured to determine a fault responsive to the sensor-based air density and the operational-based air density differing by more than a threshold.

4. The system of claim 3 , wherein the at least one processor is configured to determine an estimated air pressure using the ambient temperature information and the blower operational information responsive to the pressure sensor determined to be at fault.

5. The system of claim 3 , wherein the at least one processor is configured to determine an estimated air temperature using the ambient pressure information and the blower operational information responsive to the temperature sensor determined to be at fault.

6. The system of claim 2 , wherein the at least one processor is configured to use the sensor-based air density to control the at least a blower responsive to the sensor-based air density and the operational-based air density not differing by more than a threshold.

7. The system of claim 1 , wherein the at least a blower is a first blower and a second blower, further wherein the at least a blower sensor is a first blower sensor and a second blower sensor.

8. A method comprising:

obtaining blower operational information with a blower sensor operably coupled to a blower and configured to provide cooling air, the blower operational information representing functioning of the blower and including power consumed by the blower and one or more of voltage, current, shaft torque, or shaft rotational speed;

determining an operational-based power using the blower operational information;

determining an operational-based air density using the operational-based power, wherein the operational-based air density is an estimate of density of air used by the blower that is determined using the operational-based power; and

controlling the blower using the operational-based air density.

9. The method of claim 8 , further comprising:

obtaining ambient pressure information of a volume of air proximate the blower with a pressure sensor;

obtaining ambient temperature information of the volume of air with a temperature sensor;

determining a sensor-based air density based on the ambient pressure information and the ambient temperature information; and

comparing the sensor-based air density with the operational-based air density.

10. The method of claim 9 further comprising determining a fault when the sensor-based air density and the operational-based air density differ by more than a threshold.

11. The method of claim 10 , further comprising determining an estimated air pressure using the ambient temperature information and operational information of the blower responsive to the pressure sensor being determined to be at fault.

12. The method of claim 11 , further comprising determining an estimated air temperature using the ambient pressure information and the operational information when the temperature sensor is determined to be at fault.

13. The method of claim 9 , comprising using the sensor-based air density to control the blower when the sensor-based air density and operational-based air density do not differ by more than a threshold.

14. A method comprising:

obtaining blower operational information with a blower sensor operably coupled to a blower, the blower operational information representing functioning of the blower and including power consumed by the blower and one or more of voltage, current, shaft torque, or shaft rotational speed;

measuring at least one ambient condition to obtain sensed ambient information;

determining an operational-based air density using the blower operational information, wherein the operational-based air density is an estimate of density of air used by the blower determined using the blower operational information;

determining a sensor-based air density using the sensed ambient information;

comparing the operational-based air density with the sensor-based air density; and

determining that a fault exists when a difference between the operational-based air density and the sensor-based air density exceeds a threshold.

15. The method of claim 14 , further comprising:

obtaining supplemental blower operational information with a supplemental blower sensor operably coupled to a supplemental blower;

determining a supplemental operational-based air density using the supplemental blower operational information;

comparing the supplemental operational-based air density to the operational-based air density; and

determining a blower fault exists when a difference between the operational-based air density and the supplemental operational-based air density exceeds a threshold.

16. The method of claim 14 , wherein measuring at least one ambient condition comprises obtaining a first sensor-based temperature with a first temperature sensor and a second sensor-based temperature with a second temperature sensor, the method further comprising determining a temperature fault when a difference between the first sensor-based temperature and the second sensor-based temperature exceeds a threshold.

17. The method of claim 14 , wherein measuring at least one ambient condition comprises obtaining a sensor-based pressure with a pressure sensor, the method further comprising determining a pressure fault when a difference between the sensor-based pressure and an expected pressure exceeds a threshold.

18. The method of claim 14 , wherein measuring at least one ambient condition comprises obtaining a sensor-based temperature with a temperature sensor and a sensor-based pressure with a pressure sensor, the method further comprising

determining an estimated pressure using the blower operational information and the sensor-based temperature.

19. The method of claim 14 , wherein measuring at least one ambient condition comprises obtaining a sensor-based temperature with a temperature sensor and a sensor-based pressure with a pressure sensor, the method further comprising determining an estimated temperature using the blower operational information and the sensor-based pressure.

20. The method of claim 14 , further comprising operating the blower.