PERFORMANCE IMPROVEMENT OF SIGNAL TRANSFORMATION SCHEMES FOR ULTRA-FAST SCANNING
First Claim
1. A method for controlling a plant, comprising:
- receiving a reference signal at a feedback controller comprising signal transformation blocks for signal transformation;
wherein the signal transformation blocks translate signals between a first frequency domain and a second frequency domain; and
wherein the signal transformation blocks cause an output of the feedback controller to comprise a disturbance signal in addition to a nominal signal;
receiving the reference signal at a feed-forward controller;
recreating by the feed-forward controller the disturbance signal that was caused by the signal transformation blocks;
creating an input to the plant by;
adding the output of the feedback controller; and
subtracting the output of the feed-forward controller such that the disturbance signal is removed from the input to the plant; and
adding the output of the feed-forward controller to the output of the plant.
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Abstract
A mechanism for controlling a plant is provided. A reference signal is received at a signal transformation loop of a feedback controller. The signal transformation loop causes the reference signal to include a disturbance signal and a nominal signal. Also, the reference signal is received at a feed-forward controller, and the feed-forward controller recreates the disturbance signal that was caused by the signal transformation loop. The output of the feedback controller is input into a plant. The output of the feed-forward controller is input into the plant such that the disturbance signal is removed from the output of the feedback controller.
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Citations
20 Claims
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1. A method for controlling a plant, comprising:
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receiving a reference signal at a feedback controller comprising signal transformation blocks for signal transformation; wherein the signal transformation blocks translate signals between a first frequency domain and a second frequency domain; and wherein the signal transformation blocks cause an output of the feedback controller to comprise a disturbance signal in addition to a nominal signal; receiving the reference signal at a feed-forward controller; recreating by the feed-forward controller the disturbance signal that was caused by the signal transformation blocks; creating an input to the plant by; adding the output of the feedback controller; and subtracting the output of the feed-forward controller such that the disturbance signal is removed from the input to the plant; and adding the output of the feed-forward controller to the output of the plant. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A device configured for controlling a plant, comprising:
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memory for storing one or more programs; and a processor, functionally coupled to the memory, the processor being responsive to computer-executable instructions contained in the one or more programs and operative for; receiving a reference signal at a feedback controller comprising signal transformation blocks for signal transformation; wherein the signal transformation blocks translate signals between a first frequency domain and a second frequency domain; and wherein the signal transformation blocks cause an output of the feedback controller to comprise a disturbance signal in addition to a nominal signal; receiving the reference signal at a feed-forward controller; recreating by the feed-forward controller the disturbance signal that was caused by the signal transformation blocks; creating an input to the plant by; adding the output of the feedback controller; and subtracting the output of the feed-forward controller such that the disturbance signal is removed from the input to the plant; and adding the output of the feed-forward controller to the output of the plant. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A computer program product for controlling a plant, the computer program product comprising:
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a computer readable storage medium having computer readable program code embodied therewith, the computer readable program code for providing fast scanning comprising; receiving a reference signal at a feedback controller comprising signal transformation blocks for signal transformation; wherein the signal transformation blocks translate signals between a first frequency domain and a second frequency domain; and wherein the signal transformation blocks cause an output of the feedback controller to comprise a disturbance signal in addition to a nominal signal; receiving the reference signal at a feed-forward controller; recreating by the feed-forward controller the disturbance signal that was caused by the signal transformation blocks; creating an input to the plant by; adding the output of the feedback controller; and subtracting the output of the feed-forward controller such that the disturbance signal is removed from the input to the plant; and adding the output of the feed-forward controller to the output of the plant. - View Dependent Claims (18, 19, 20)
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Specification