Method for extracting differential signals and differentiator

Abstract

Provided are a method for extracting differential signals and a differentiator. The method comprises a first step of calculating a first integral signal z0 according to an output signal u of the differentiator, and calculating an error signal according to the first integral signal z0 and an input signal; a second step of calculating a second integral signal according to the error signal; a third step of constructing a nonlinear diffusion model according to the second integral signal and the error signal, and calculating a differential signal of the input signal according to the nonlinear diffusion model. According to the method, extraction of the input signal approximate differential is achieved by adopting the nonlinear diffusion model according to a computer construction error and an integral thereof. Compared with an existing differential signal extraction method, according to the method, not only is the implementation cost lower, but also the precision of the differential signals obtained by extraction is also higher.

Description

technical field [0001] The invention relates to the technical field of communication and control, in particular to a method for extracting a differential signal. Background technique [0002] In the field of spacecraft control, the differential quantities of some signals are difficult to measure or difficult to measure accurately, and expensive professional instruments are required to accurately measure the differential quantities of these signals. For example, on a hypersonic spacecraft, a gyroscope can be used to measure the attitude angle of the spacecraft. At the same time, in the design of the controller of the spacecraft, it is often necessary to increase the damping of the system according to the differential signal of the spacecraft’s angle of attack , while the differential signal of the spacecraft angle of attack is often difficult to measure accurately. [0003] Therefore, there is an urgent need for a method that can simply and accurately extract the differentia...

AI Technical Summary

Problems solved by technology

[0002] In the field of spacecraft control, the differential quantities of some signals are difficult to measure or difficult to measure accurately, and if the differential quantities of these signals need to be accurately measured, expensive professional instruments are required

For example, on a hypersonic spacecraft, a gyroscope can be used to measure the attitude angle of the spacecraft. At the same time, in the design of the controller of the spacecraft, it is often necessary to increase the damping of the system according to the differential signal of the spacecraft’s angle of attack , while the differential signal of the spacecraft angle of attack is often difficult to measure accurately

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