A method for extracting a differential signal and a differentiator

Abstract

A method for extracting a differential signal and a differentiator, wherein the method includes: step 1, calculating a first integral signal z0 according to an output signal u of the differentiator, and calculating an error signal based on the first integral signal z0 and an input signal; step 2, Calculating a second integral signal according to the error signal; step 3, constructing a nonlinear softening model according to the second integral signal and the error signal, and calculating a differential signal of the input signal according to the nonlinear softening model. According to the computer construction error and its integral, the method can use the nonlinear softening model to realize the extraction of the approximate differential of the input signal. Compared with the existing differential signal extraction method, the method not only has lower implementation cost, but also has higher precision of the extracted differential signal.

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

Images