科研之友
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摘要
As the key link in the field of signal processing , the integrator is widely used in measurement in power system and control engineering . Generally , research on the digital integrator is based on traditional Newton Cotes algorithm , the high frequency response of low order Cotes formula is usually poor , and the design of the transfer function introduced by high order of the formula is too complex . Based on a study of error between the composite Cotes transmission function and ideal integration , the output signal which are weighted by Romberg algorithm at the same algorithm order before and after integrator sampling frequency are doubled , then the accuracy of digital integrator is improved and the composite is lower . The digital integrator designed with better transient and steady performance has an accuracy of 0 .01% as verified by simulation and test .
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