CN-122026756-A - Frequency conversion ratio resonance controller under angle domain

CN122026756ACN 122026756 ACN122026756 ACN 122026756ACN-122026756-A

Abstract

The invention relates to the technical field of resonance control, and particularly discloses a variable frequency proportion resonance controller in an angle domain, which comprises a signal sensing module, a phase-locked loop and a control module, wherein the signal sensing module acquires a variable frequency signal and an expected reference signal, obtains a time domain error signal through differential processing, and simultaneously extracts an instantaneous phase increment through the phase-locked loop; the method comprises the steps of carrying out space granularity matching on instantaneous phase increment by a granularity matching module, judging phase alignment mismatch and calculating grid misalignment deviation, establishing an angle domain orthogonal discrete coordinate system by a mapping reconstruction module, mapping a time domain error signal to the coordinate system and eliminating phase noise to generate a stable angle domain sequence, constructing an angle domain compensation pedigree converged to zero steady state error by an evolution control module by adopting a proportional resonance model with fixed parameters, and generating a self-adaptive variable frequency driving signal by a reverse reconstruction module through reverse mapping from the angle domain to the time domain. The invention is beneficial to reducing harmonic interference and adapting to the dynamic operation requirement of a frequency conversion system.

Inventors

CHENG JILONG
WANG SONG

Assignees

安徽聚芯智造科技股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260121

Claims (10)

1. The frequency conversion ratio resonance controller in the angle domain is characterized by comprising the following modules: The signal sensing module is used for acquiring the variable frequency signal output by the system and performing domain error processing to obtain a time domain error signal; The granularity matching module is used for carrying out space granularity matching evaluation on the instantaneous phase increment, judging whether phase alignment mismatch exists on the angle domain grid of the sampling point or not, and if so, calculating grid non-alignment deviation of the sampling point from an ideal angle node; The mapping reconstruction module is used for establishing an orthogonal discrete coordinate system of the angle domain, taking a time domain error signal as a vector to be corrected deviating from a coordinate axis, mapping and projecting the vector to be corrected onto a reference axis of the coordinate system of the angle domain based on grid misalignment deviation, removing phase noise and establishing a stable angle domain sequence; And the evolution control module is used for constructing a proportional resonance model with fixed parameters, carrying out infinite gain integral evolution on the stable angle domain sequence, and establishing an angle domain compensation pedigree converged to zero steady-state error.
2. The variable frequency proportional resonance controller under an angle domain according to claim 1, wherein the time domain error processing is performed by: Acquiring a variable frequency signal output by a current sampling point system in a sampling period in real time, and acquiring an expected reference signal of the same period of the variable frequency signal from an instruction unit of a system controller; and carrying out differential processing on the variable frequency signal and the expected reference signal to obtain a time domain error signal of time tracking.
3. The variable frequency proportional resonance controller under an angle domain according to claim 1, wherein the spatial granularity matching evaluation is performed by: And obtaining the projection allowance to carry out zero value logic threshold judgment to obtain a judgment result of whether phase alignment mismatch exists.
4. The variable frequency proportional resonance controller under an angle domain as set forth in claim 3, wherein the projection margin is obtained by: setting a target grid interval of angle domain discretization processing as a standard angle resolution; Establishing N equally-spaced discrete scale points in an angle domain coordinate system based on standard angle resolution, and defining the discrete scale points as ideal angle nodes; Acquiring a system accumulated phase of the last sampling time in a sampling period, superposing an instantaneous phase increment and the system accumulated phase, and updating the absolute position of the current sampling point in an angle domain grid; and carrying out analog-digital projection operation on the absolute position and the standard angle resolution to obtain the projection allowance of the current sampling point relative to the nearest neighbor ideal angle node.
5. The variable frequency proportional resonance controller under an angle domain as set forth in claim 1, wherein said sequence of plateau angle domains is established by: establishing a space transformation matrix, carrying out orthogonal projection transformation on the vector to be corrected and the space transformation matrix, and retaining effective projection components in the direction of the unit orthogonal basis vector; And rearranging all the effective components projected onto the unit orthogonal basis vectors according to the angle sequence to generate a sequence with variable time intervals and constant angle intervals, namely a stable angle domain sequence.
6. The angular domain down-conversion ratio resonant controller of claim 4, wherein the spatial transformation matrix is established by: establishing an angle domain discrete coordinate system consisting of N unit basis vectors by taking an ideal angle node as a reference; Taking the amplitude of the time domain error signal as a module of a vector to be corrected and taking the instantaneous phase position of the time domain error signal as the direction of the vector to be corrected; and carrying out space quantization on the grid misalignment deviation to serve as projection parameters of the space included angle, extracting a principal axis projection coefficient and a side lobe attenuation coefficient based on the projection parameters, and establishing a space transformation matrix containing the principal axis projection coefficient and the side lobe attenuation coefficient.
7. The angular domain down-conversion proportional resonant controller of claim 1, wherein the angular domain compensation pedigree is established by: constructing a proportional resonance model of the dual-channel parallel topological structure, wherein the proportional resonance model is logically divided into a proportional response channel and a resonance evolution channel; Performing two-channel parallel evolution operation based on the stable angle domain sequence and the proportional response channel and the resonance evolution channel to obtain an output value of the proportional channel and an output value of the resonance channel; And (3) superposing the output value of the proportional channel and the output value of the resonant channel to generate a synthetic data sequence which is the angle domain compensation pedigree.
8. The variable frequency proportional resonance controller under an angle domain as set forth in claim 7, wherein the output value of the obtained proportional channel is obtained by: and directly multiplying the stable angle domain sequence and the proportional gain coefficient to obtain an output value of the proportional channel.
9. The angular domain down conversion ratio resonant controller of claim 1, wherein: The reverse reconstruction module is used for establishing a reverse mapping channel from the angle domain to the time domain based on the angle domain compensation pedigree, and carrying out time domain demodulation and recombination processing on the angle domain compensation pedigree based on the reverse mapping channel in combination with the real-time phase state to generate a variable frequency driving signal.
10. The variable frequency proportional resonance controller under an angle domain as set forth in claim 1, wherein said reverse mapping channel is established by: Acquiring a real-time phase of a system at the current sampling moment, and defining the real-time phase as a dynamic reading pointer; And establishing phase-address index logic pointed to the phase mapping storage space by the dynamic reading pointer, wherein the index logic forms a reverse mapping channel for connecting the continuously flowing time domain signal and the statically distributed angle domain data.

Description

Frequency conversion ratio resonance controller under angle domain Technical Field The invention relates to the technical field of resonance control, in particular to a frequency conversion ratio resonance controller in an angle domain. Background In the field of power electronic control, a Proportional Resonance (PR) controller designed based on an internal mode principle is widely applied to rated condition control of various power electronic equipment by virtue of the characteristic that the PR controller can realize constant-frequency sine quantity non-difference tracking in an alternating current control system. However, in practical industrial situations such as electric traction transmission and electromagnetic emission, the signal frequency during the system operation often varies greatly and dynamically, and the application limitations of the conventional PR controller and the quasi-PR controller are more and more remarkable. The key problem is that the resonant frequency of the traditional controller is fixedly designed to be suitable for a specific fixed-frequency signal, and the frequency of the variable-frequency signal continuously fluctuates with time in the time domain, so that the fixed resonant frequency of the traditional controller cannot be matched with the dynamically-changing signal frequency in real time. From the aspect of signal characteristics, the frequency conversion signal in the time domain is inconstant due to the frequency, so that the internal model of the traditional PR controller cannot accurately capture a signal model, and further, no-difference tracking is difficult to realize, and finally, the control precision is reduced, the system stability is poor, and the control requirement under the wide frequency change working condition cannot be met. To this end, the invention provides a variable frequency proportional resonant controller in the angular domain. Disclosure of Invention The invention aims to provide a variable frequency proportional resonance controller in an angle domain, so as to solve the background problem. The aim of the invention can be achieved by the following technical scheme: A frequency conversion ratio resonance controller under an angle domain comprises the following modules: The signal sensing module is used for acquiring the variable frequency signal output by the system and performing domain error processing to obtain a time domain error signal; The granularity matching module is used for carrying out space granularity matching evaluation on the instantaneous phase increment, judging whether phase alignment mismatch exists on the angle domain grid of the sampling point or not, and if so, calculating grid non-alignment deviation of the sampling point from an ideal angle node; The mapping reconstruction module is used for establishing an orthogonal discrete coordinate system of the angle domain, taking a time domain error signal as a vector to be corrected deviating from a coordinate axis, mapping and projecting the vector to be corrected onto a reference axis of the coordinate system of the angle domain based on grid misalignment deviation, removing phase noise and establishing a stable angle domain sequence; And the evolution control module is used for constructing a proportional resonance model with fixed parameters, carrying out infinite gain integral evolution on the stable angle domain sequence, and establishing an angle domain compensation pedigree converged to zero steady-state error. As a further technical scheme of the invention, the time domain error processing method comprises the following steps: Acquiring a variable frequency signal output by a current sampling point system in a sampling period in real time, and acquiring an expected reference signal of the same period of the variable frequency signal from an instruction unit of a system controller; and carrying out differential processing on the variable frequency signal and the expected reference signal to obtain a time domain error signal of time tracking. As a further technical scheme of the invention, the method for carrying out the space granularity matching evaluation is as follows: And obtaining the projection allowance to carry out zero value logic threshold judgment to obtain a judgment result of whether phase alignment mismatch exists. The method for obtaining the projection allowance comprises the following steps: setting a target grid interval of angle domain discretization processing as a standard angle resolution; Establishing N equally-spaced discrete scale points in an angle domain coordinate system based on standard angle resolution, and defining the discrete scale points as ideal angle nodes; acquiring a system accumulated phase of the last sampling time in a sampling period, and superposing an instantaneous phase increment and the system accumulated phase to update the absolute position of the current sampling point in an angle domain grid; and carrying out analo