Control network with on-line iteration and adaptive filter

A feedback control system for modifying a drive signal to a plant which provides an achieved response signal in response to the drive signal, the control system comprising:

• difference means for providing a response error signal representing the difference between a desired response signal and the achieved response signal;
• an adaptive filter for adjusting the response error signal in accordance with a dynamic behavior of the adaptive filter to provide a drive correction signal;
• compensation means for adjusting the dynamic behavior of the adaptive filter in response to the drive signal and the achieved response signal;
• summing means for providing a corrected drive signal representing the sum of the drive signal and the drive correction signal;
• storage means for delaying the corrected drive signal;
• and
• conversion means for providing the modified drive signal as a function of the signal delayed by the storage means.

An iterative feedback control system for creating a drive signal to a plant and for compensating for dynamic errors of the plant, the plant providing an achieved response signal in response to the drive signal, the control system comprising:

• a signal source providing a desired response signal for each iteration;
• difference means for providing a response error signal during iterations subsequent to a first iteration representing the difference between the desired response signal and the achieved response signal;
• adaptive filter means for adjusting the desired response signal during the first iteration in accordance with a dynamic behavior of the adaptive filter means to provide the drive signal during the first iteration, and for adjusting the response error signal during the iterations subsequent to the first iteration in accordance with the dynamic behavior of the adaptive filter means to provide a drive correction signal;
• compensation means for adjusting the dynamic behavior of the adaptive filter means in response to the drive signal and the achieved response signal;
• summing means for providing a corrected drive signal during the iterations subsequent to the first iteration representing the sum of the drive signal and the drive correction signal;
• and
• storage means for storing the drive signal during the first iteration for use as the drive signal in a second iteration and for storing the corrected drive signal during the iterations subsequent to the first iteration for use as the drive signal in iterations subsequent to the second iteration.

An iterative feedback control system for providing a drive signal to a plant which provides an achieved response signal in response to the drive signal during each iteration, the control system comprising:

• difference means for providing a response error signal for each iteration representing the difference between a fixed desired response signal and the achieved response signal from a corresponding iteration;
• correction means for providing a corrected drive signal for use as the drive signal in the next iteration, the correction means, including:
• means for accumulating and filtering the response error signals based on the plant performance during the current and previous iterations, the filtering being in accordance with a dynamic behavior, means for adding the accumulation of filtered response error signals to an initial drive signal to provide the corrected drive signal;
• and
• compensation means for adjusting the dynamic behavior in response to the drive signal and the achieved response signal.