Unlock instant, AI-driven research and patent intelligence for your innovation.

Rotor multi-frequency vibration active control algorithm for interference vector adaptive identification

A technology of self-adaptive identification and active control, applied in the direction of self-adaptive control, general control system, control/regulation system, etc., can solve problems such as poor control effect

Inactive Publication Date: 2020-05-01
QINGDAO UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the deficiencies of the existing rotor system in active control of multi-frequency rotor vibration, including the problems of affecting system stability and poor control effect under variable speed conditions, the present invention proposes a rotor multi-frequency vibration active control with disturbance vector adaptive identification The control algorithm, by calculating the value of the objective function in real time, dynamically adjusts the amplitude and phase of the step vector, realizes the identification and compensation of multi-frequency interference in the system feedback loop, avoids the rotor system from responding to multi-frequency interference, and realizes the operation under variable speed conditions. Active Control of Multi-Frequency Rotor Vibration under Stability

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Rotor multi-frequency vibration active control algorithm for interference vector adaptive identification
  • Rotor multi-frequency vibration active control algorithm for interference vector adaptive identification
  • Rotor multi-frequency vibration active control algorithm for interference vector adaptive identification

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Introduce the specific content of the present invention in conjunction with an active rotor system, the structural block diagram of the active rotor system is as follows figure 2 As shown, it is mainly composed of controller, actuator, rotor system and displacement sensor. The working principle of the active rotor system is that the displacement sensor detects the rotor displacement of the rotor system, and the rotor displacement detection value x(t) is related to the displacement given value x 0 The difference after comparison is sent to the controller, and the controller sends a control signal u(t) to the actuator, and the actuator generates a control force to act on the rotor system to realize the stable operation of the rotor system. Different types of active rotor systems are mainly different in actuators. For example, for the commonly used electromagnetic bearing-rotor system, the actuators are power amplifiers and electromagnetic bearing bodies.

[0058] The im...

Embodiment 2

[0093] In order to verify the effectiveness of the above interference vector adaptive identification algorithm, the performance of the interference identification and strategy is verified by MATLAB simulation.

[0094] In this embodiment, the actual interference vector is set to d l1 =0.1∠π / 3, angular frequency ω=100πrad / s, step vector amplitude coefficient R s =0.25, Δθ=π / 2.

[0095] Figure 4(a)-Figure 4(b) The simulation results of the identification of the strategy and the interference suppression process under the condition of no noise are given, and the interference suppression strategy is enabled at the simulation time of 0.1s. Figure 4(a) shows the objective function value A before and after starting the algorithm 1 The time domain waveform of , Fig. 4(b) is the interference vector identification result d 1 with actual value d l1 contrast. Figure 4(b) shows that the algorithm has good convergence speed and accurate identification results.

[0096] In the variabl...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a rotor multi-frequency vibration active control algorithm for interference vector adaptive identification, and belongs to the technical field of rotor multi-frequency vibration active control. The rotor multi-frequency vibration active control algorithm comprises the following steps of target function definition is to process a control signal in an active rotor system through discrete Fourier transform, and then define a target function of an identification algorithm; the interference vector adaptive identification algorithm based on a target function value is used for realizing identification of a multi-frequency interference vector, and is realized through step-by-step adjustment of a step vector, and the amplitude and phase of the step vector are adjusted in real time according to the change of the target function value; and offset signal generation is to generate an offset signal according to the interference vector obtained by identification, and superpose the offset signal with an original control signal, thereby eliminating the influence of multi-frequency interference on rotor vibration. The rotor multi-frequency vibration active control algorithmis used for a rotor system with an active control unit, and realizes multi-frequency vibration active control of the active rotor system, so as to suppress the rotor vibration caused by the multi-frequency interference of the rotor system in the whole rotating speed operation range.

Description

technical field [0001] The invention relates to a rotor multi-frequency vibration active control algorithm for self-adaptive identification of disturbance vectors, and belongs to the technical field of rotor multi-frequency vibration active control. Background technique [0002] In the rotor system, the inhomogeneity of rotor material properties, machining errors and deformation will cause the deviation of the rotor mass center and geometric center, which is the so-called "rotor imbalance". When the rotor rotates, the unbalanced rotor will synchronously cause unbalanced forces and cause the rotor to vibrate at the same frequency as the rotational speed. In addition to the same-frequency vibration, the detection error of the sensor and other disturbances in the operation of the rotor system will also cause multi-frequency vibration of the rotor and reduce the performance of the rotor system. [0003] In order to realize the active control of vibration in the rotor system, a ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/02
CPCG05B13/02
Inventor 于洁吴新振由蕤王保俊
Owner QINGDAO UNIV