Systems and Methods for Calibrating Triaxial Accelerometers
First Claim
1. A method for calibrating a multiple-triad triaxial accelerometer, comprising:
- defining an objective function comprising one or more unknown calibration constants, wherein the objective function accounts for at least alignment and rotation;
receiving accelerometer measured output for at least as many distinct positions as there are unknown calibration constants;
determining initial approximations for each of the unknown calibration constants;
optimizing output from the objective function;
extracting one or more optimized calibration constants resulting from the optimization; and
storing the one or more optimized calibration constants associated with at least one calibration function in a controller associated with the multiple-triad triaxial accelerometer.
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Abstract
A method for calibrating a multiple-triad triaxial accelerometer is provided. The method may include receiving accelerometer measured output from a first measurement triad and at least one additional measurement triad of the accelerometer. The method may further include aligning the output of a x, y, and z components of the first measurement triad to be substantially orthogonal with respect to each other, aligning the output of x, y, and z components of at least one additional measurement triad to be substantially orthogonal with respect to each other, and rotating the output of at least one measurement triad so the outputs of all measurement triads substantially align with each other. The method may further include storing the result of the alignment and rotation associated with at least one calibration function associated with the multiple-triad triaxial accelerometer. The alignment and rotation may be performed substantially simultaneously.
34 Citations
20 Claims
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1. A method for calibrating a multiple-triad triaxial accelerometer, comprising:
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defining an objective function comprising one or more unknown calibration constants, wherein the objective function accounts for at least alignment and rotation; receiving accelerometer measured output for at least as many distinct positions as there are unknown calibration constants; determining initial approximations for each of the unknown calibration constants; optimizing output from the objective function; extracting one or more optimized calibration constants resulting from the optimization; and storing the one or more optimized calibration constants associated with at least one calibration function in a controller associated with the multiple-triad triaxial accelerometer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for calibrating a multiple-triad triaxial accelerometer, comprising:
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a controller operable to; store an objective function comprising one or more unknown calibration constants, wherein the objective function accounts for at least alignment and rotation; receive accelerometer measured output in at least as many distinct positions as there are unknown calibration constants; determine initial approximations for each of the unknown calibration constants; optimize output from the objective function; extract optimized calibration constants resulting from the optimization; and store the optimized calibration constants associated with at least one calibration function in the controller. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for calibrating a multiple-triad triaxial accelerometer comprising:
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receiving accelerometer measured output from a first measurement triad and at least one additional measurement triad of the multiple-triad triaxial accelerometer; aligning the output of a first x component, a first y component, and a first z component of the first measurement triad to be substantially orthogonal with respect to each other; aligning the output of at least one additional x component, at least one additional y component, and at least one additional z component of the at least one additional measurement triad to be substantially orthogonal with respect to each other; rotating the output of at least one of the first measurement triad and the at least one additional measurement triad so the outputs of all measurement triads substantially align with each other; and storing the result of the alignment and rotation associated with at least one calibration function associated with the multiple-triad triaxial accelerometer; wherein the alignment and rotation are performed substantially simultaneously. - View Dependent Claims (20)
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Specification