Reciprocating searching and routing method for extreme group of noisy variable-frequency oscillation attenuation signals

Abstract

The invention discloses a reciprocating searching and routing method for an extreme group of noisy variable-frequency oscillation attenuation signals. The reciprocating searching and routing method comprises a noisy variable-frequency oscillation attenuation signal acquisition step of an engineering system, and further comprises the following steps: (1) setting the searching method; (2) extracting an attenuation signal with duration of 8Td to generate a prepared array {x}'; (3) implementing forward searching by adopting the searching method 1 and taking {x}' as a universe to find out the maximum convex peak Mi in the universe and the position thereof; (4) adopting the searching method 2 to build a target array {x}; (5) adopting the searching method 3 to find out the maximum convex peak M' and the position thereof in the {x} universe; (6) adopting the searching method 1 to find out the secondary big convex peak Mi+1 and the position thereof; (7) obtaining the extreme group and the track of the noisy variable-frequency oscillation attenuation signal. The reciprocating searching and routing method can reduce the misjudgment rate of computer programs, improve the searching success rate and can be widely applied to mechanical systems and electric systems.

Description

Technical field [0001] The invention relates to a reciprocating search and tracing method, and more specifically, to a reciprocating search and tracing method of a noisy variable frequency oscillation attenuation signal extreme value group, belonging to the technical field of signal acquisition and analysis. Background technique [0002] For such as figure 1 The mechanical system with masses, dampers, and springs shown, the simple expression describing the state of its motion speed is: In formula (1), m is the mass of the mass; c is the damping coefficient of the damper; k is the stiffness of the spring; v(t) is the moving speed of the mass; F(t) is the force of the mechanical system. [0003] for figure 2 The electrical system shown with inductors, resistors, and capacitors, the simple expression describing its current state is: In formula (2), L is the inductance value of the inductor; R is the resistance value of the resistor; C is the capacitance value of the capacitor; i(t) ...

AI Technical Summary

Problems solved by technology

[0008] However, for the noise-containing frequency conversion oscillation attenuation signal, because its curve contains high-frequency burrs and is not smooth, when it is required to determine the extreme value group trajectory and its value including the largest convex peak, the largest concave peak, and the second largest convex peak in the signal, at the same time When the full-period oscillation attenuation waveform containing the largest convex peak is provided, it is easy for the computer program to misjudgment or search failure, resulting in the incorrect position and value of the extreme value group, which makes subsequent use of the extreme value group and the largest convex peak The calculation of the characteristic parameters of the engineering system, the monitoring and control of the system status cannot be carried out smoothly

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