Configurable, nonlinear fan control for system-optimized autonomous cooling
First Claim
1. A controller operable to control a fan speed of a fan by approximating a nonlinear temperature control function associated with a temperature control range, the controller operable to approximate the nonlinear temperature control function by:
- dividing the temperature control range into a plurality of segments, each segment associated with a sub-range of temperatures;
determining one or more control coefficients for each of the segments; and
generating a control signal using the one or more control coefficients for at least one of the segments and one or more measured temperatures that have been normalized, the control signal capable of controlling the fan speed of the fan.
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Accused Products
Abstract
Disclosed herein are methods and systems for controlling fan speed by approximating a nonlinear temperature control function activated within a given temperature control range. The temperature control range is divided into numerous linear segments each of which is associated with a sub-range of temperatures and may approximate a segment of the control function. Control coefficients may be determined for each of the linear segments. The controlled temperature is measured and used for determining a corresponding sub-range, and a linear segment. A control signal may be calculated according to the control coefficients of the segment determined by the measured temperature. The control signal is used for the activation of one or more fans, and is continuously determined for new measured temperatures.
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Citations
21 Claims
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1. A controller operable to control a fan speed of a fan by approximating a nonlinear temperature control function associated with a temperature control range, the controller operable to approximate the nonlinear temperature control function by:
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dividing the temperature control range into a plurality of segments, each segment associated with a sub-range of temperatures; determining one or more control coefficients for each of the segments; and generating a control signal using the one or more control coefficients for at least one of the segments and one or more measured temperatures that have been normalized, the control signal capable of controlling the fan speed of the fan. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus, comprising:
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a fan having a speed based on a control signal; and a controlled capable of generating the control signal by approximating a nonlinear temperature control function associated with a temperature control range, the controller capable of approximating the nonlinear temperature control function by; dividing the temperature control range into a plurality of segments, each segment associated with a sub-range of temperatures; determining one or more control coefficients for each of the segments; and generating the control signal using the one or more control coefficients for at least one of the segments and one or more measured temperatures that have been normalized. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A method, comprising:
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dividing a temperature control range associated with a nonlinear temperature control function for a fan into a plurality of segments, each segment associated with a sub-range of temperatures; determining one or more control coefficients for each of the segments; and generating a control signal using the one or more control coefficients for at least one of the segments and one or more measured temperatures that have been normalized, the control signal capable of controlling a fan speed of the fan. - View Dependent Claims (19, 20, 21)
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Specification