Fractional order delay realization method based on sampling control separation principle

Abstract

The invention discloses a fractional order delay realization method based on a sampling control separation principle, which belongs to the technical field of control theories and signal processing. According to the sampling control separation principle, a high-speed timer of a microprocessor is used to generate fixed delay to trigger sampling to realize fractional order delay sampling, a fractional order delay link is further realized, the timer is adopted to count the fixed delay after each control period begins and triggers a sampling module to carry out fractional order delay sampling on input at the expiration of the fixed delay, the fixed delay can be determined according to a product between the fractional order delay beat number and the control period, the fractional order signals sampled in a former period are used for calculation in a next controller calculation period, the following other realization is similar to realization of the traditional control system, the design is simple, too many parameters do not need to be calculated, and an approximate fitting condition does not exist.

Description

technical field

[0001] The invention discloses a method for realizing fractional time delay based on the separation principle of sampling control, and belongs to the technical field of control theory and signal processing. Background technique

[0002] In digital control systems, especially in control systems with low control update frequency, it is often necessary to implement a fractional delay link. The previous implementation scheme has been realized by interpolation method and FIR principle, but this scheme is an approximate fitting scheme, there will be high-frequency attenuation in the amplitude, and the signal cannot be kept straight through in the whole frequency band; and its accuracy and the required memory resources are mutually restricted, and it is impossible to use less memory resources to achieve high-precision fractional delay links. So the previous solution is not an optimal solution. This application aims to propose a solution that can realize high-preci...

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