Buck circuit control method of sliding mode variable structure based on extreme learning machine

Abstract

The invention discloses a sliding mode variable structure Buck circuit control method based on an extreme learning machine, and the method comprises the following steps: S10, carrying out the analysis of a Buck circuit topological structure, and building a system mathematical model through a state space averaging method; S20, defining a sliding mode surface of a controller, designing an extreme learning machine adaptive law, and designing the controller according to the system mathematical model in the S10; S30, verifying the existence of the sliding mode and the stability of the system by using the Lyapunov theorem according to the controller in the S20. Voltage and current signal changes of the circuit are monitored at the same time, and duty ratio signals output by a system are corrected in real time; the system can rapidly reach the sliding mode surface from any initial state, loads are switched when the circuit is in a steady state, the system can be stabilized to a steady-state output voltage value in a short time, the robustness of a controller is guaranteed, and system buffeting is weakened.

Description

technical field [0001] The invention belongs to the field of electronic power control, and relates to a Buck circuit control method based on a sliding mode variable structure of an extreme learning machine. Background technique [0002] Buck circuit belongs to the category of power electronics technology. It is a power supply module used by many devices and equipment. Compared with ordinary linear power supplies, it has the advantages of small size, light weight, low power consumption, high efficiency, and fast response. In electronic power technology field is gaining more and more attention. The Buck circuit converts the input DC voltage to a lower DC voltage stable output, and its performance largely depends on the control strategy of the system. The traditional linear PID control shows poor resistance to the nonlinear time-varying system of the Buck circuit. Interference ability, when the load is disturbed, there are many problems such as unstable performance, slow respo...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above problems, the technical solution of the present invention is a Buck circuit control method based on the sliding mode variable structure of the extreme learning machine, which solves the problems of slow response speed, poor dynamic performance, and poor robustness of the Buck circuit in traditional linear PID control, and realizes Output Voltage Stability Tracking Control of Buck Circuit

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