Digital signal control using first order holds

Details Digital signal control using first order holds Digital signal control using first order holds

2004-05-18

2009-12-29

Bullock, Jr., Lewis A (Department: 2193)

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Particular function performed

C708S313000, C341S126000, C341S143000, C341S144000

Reexamination Certificate

active

07640281

ABSTRACT:
A method is provided to reduce delay in signal processing of a digital control system. The method includes receiving outputs from a digital controller at a first frequency. A pre-load data value is then loaded into an accumulator register and output to a digital to analog converter (DAC). In one preferred embodiment, the pre-load data value is the value of the current digital controller output. In another preferred embodiment, the pre-load data value is the value of a previous digital controller output. The method additionally includes computing a step increment value that includes the difference between the most recent value output from the digital controller and the value output by the digital controller just prior to the most recent value. The step increment value is added to the pre-load data value in the accumulator register to create an augmented value, which is then output to the DAC. At a second frequency that is greater than the first frequency, the step increment value is periodically added to the augmented value to create subsequent augmented values. The subsequent augmented values are then output to the DAC until a subsequent value is received from a digital controller at the first frequency.

REFERENCES:
patent: 3839675 (1974-10-01), Wernikoff et al.
patent: 4593271 (1986-06-01), Candy
patent: 5594443 (1997-01-01), Lam
patent: 5606319 (1997-02-01), Yatim et al.
patent: 5786778 (1998-07-01), Adams et al.
patent: 5798724 (1998-08-01), Myers
patent: 6492922 (2002-12-01), New
William B. Cleveland, “First-order-hold Interpolation Digital-toanalog converter with Application to Aircraft Simulation”, Nov. 1976, NASA Technical Note, NASA TN D-8331.

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