CN-121778512-B - Self-adaptive tension regulation and control method for mirror aluminum foil precision molding

CN121778512BCN 121778512 BCN121778512 BCN 121778512BCN-121778512-B

Abstract

The invention belongs to the technical field of metal material processing control, and in particular relates to a self-adaptive tension regulation and control method for mirror aluminum foil precision molding, which comprises the following steps that S1, all-element working condition data in the mirror aluminum foil molding process are obtained, wherein the all-element working condition data comprise feedback tension values, linear speeds and driving rotation speeds of a main driving motor; S2, evaluating stability confidence indexes according to the feedback tension value and the linear speed, judging that tension deviation belongs to systematic errors or random interference through the stability confidence indexes, and S3, dynamically mapping bandwidth sensitivity based on the stability confidence indexes and the driving rotating speed. The invention can effectively remove high-frequency noise interference, obviously reduce tension fluctuation among multistage roller systems, solve the difficult problem of stress fold in ultra-thin aluminum foil forming, eliminate overshoot and reciprocating swing in conventional control, and improve the flatness of the mirror surface.

Inventors

WANG DONG
LIU JIGANG
LI CHAOFENG
Chai Jiadong

Assignees

上海郑璞金属材料有限公司
河南润鑫新材料股份有限公司

Dates

Publication Date: 20260508
Application Date: 20260304

Claims (8)

1. The self-adaptive tension regulation and control method for precisely forming the mirror aluminum foil is characterized by comprising the following steps of: S1, acquiring all-element working condition data in the mirror aluminum foil forming process, wherein the all-element working condition data comprise a feedback tension value, a linear speed and a driving rotating speed of a main driving motor; s2, evaluating stability confidence indexes according to the feedback tension value and the linear speed, and judging whether tension deviation belongs to systematic errors or random interference according to the stability confidence indexes The calculation formula of (2) is as follows: , In order to feed back the value of the tension, For the tension constant of the object to be achieved, Is a constant of the static bias and, Is a natural constant which is used for the production of the high-temperature-resistant ceramic material, In order to provide a rate of change of tension, For an inter-level physical span, Is the linear velocity; S3, dynamically mapping bandwidth sensitivity based on stability confidence indexes and driving rotating speed, and adjusting the sensing bandwidth of a control system through the bandwidth sensitivity to realize mechanical noise suppression in different rotating speed intervals, wherein the bandwidth sensitivity is used for controlling the driving rotating speed The calculation formula of (2) is as follows: , as a basis for the perceived bandwidth, In order to be a dynamic damping coefficient, In order to drive the rotational speed, Is the maximum driving rotation speed; and S4, carrying out decoupling calculation by utilizing a phase advance attenuation factor constructed based on the inter-stage physical span in combination with the feedback tension value, the bandwidth sensitivity and the linear speed, and outputting a tension regulation and control instruction.
2. The adaptive tension control method for precision molding of mirror aluminum foil according to claim 1, wherein the evaluation logic of the stability confidence index comprises: responding to the stability confidence index reduction caused by the increase of the tension change rate, judging that the current fluctuation is mechanical instantaneous impact, and weakening the deviation rectifying force; And responding to the feedback tension value continuously deviating from the target tension constant and maintaining the stability confidence index at a high position, judging that the current fluctuation is systematic deviation, and starting deviation correction.
3. The adaptive tension control method for precision shaping of mirror aluminum foil as recited in claim 1, wherein the logic for dynamically mapping the bandwidth sensitivity comprises: Obtaining a standardized rotation speed proportion of a main driving motor, and if the standardized rotation speed proportion is increased to cause mechanical noise frequency to enter a control bandwidth, compressing bandwidth sensitivity by increasing denominator terms in a calculation formula to enable a controller to enter a flexible filtering state; if the stability confidence index judges that systematic deviation occurs, the deviation correcting response speed is improved by increasing the bandwidth sensitivity.
4. The method for adaptive tension control for precision molding of aluminum foil mirror surface according to claim 1, wherein the tension control command is The calculation formula of (2) is as follows: in the formula, In order to achieve a proportional gain, For the tension constant of the object to be achieved, In order to feed back the value of the tension, For the bandwidth sensitivity of the device, For the real-time observation of the disturbance modes, As a phase advance decay factor based on physical distance, For an inter-level physical span, In order to be a line speed, Is a discrete sampling period.
5. The method for adaptive tension control for precision shaping of aluminum foil on a mirror surface according to claim 4, wherein the logic for outputting the tension control command comprises: the time when the tension mutation of the roller system of the previous stage reaches the current stage is prejudged by a phase advance attenuation factor, and disturbance compensation quantity is injected into the controller in advance to offset the impact which is to be reached.
6. The adaptive tension control method for precision molding of the mirror aluminum foil according to claim 1, wherein the acquisition process of the full-element working condition data realizes synchronous acquisition through a high-speed data acquisition bus, and the sampling period is smaller than or equal to a preset discrete sampling period.
7. The adaptive tension control method for precision molding of mirror aluminum foil according to claim 1, wherein a static bias constant in the calculation of the stability confidence index is used to prevent the calculation formula from generating numerical singular points under steady-state conditions and is used as a fault tolerance threshold of the system.
8. The method for adjusting and controlling the self-adaptive tension for precisely forming the mirror-surface aluminum foil according to claim 7, wherein the static bias constant has a value of 2.

Description

Self-adaptive tension regulation and control method for mirror aluminum foil precision molding Technical Field The invention belongs to the technical field of metal material processing control, and particularly relates to a self-adaptive tension regulation and control method for precision molding of a mirror aluminum foil. Background In the precision molding production line of the mirror aluminum foil, the thickness of the aluminum foil is extremely thin and is usually between ten micrometers and fifty micrometers, which is equivalent to the thickness of only a few common papers, and the physical properties of the aluminum foil show extremely strong flexibility and deformability. The characteristics of the multi-stage tension roller system form a highly coupled organic whole through the aluminum foil, and the tiny tension fluctuation of any one-stage roller system, even tiny rotating speed deviation or stress variation, can be rapidly transmitted to the whole roller system to trigger a chain reaction. However, conventional tension control approaches have significant limitations in facing high-speed, precise, complex conditions. In order to filter out high-frequency noise caused by bearing microseismic, motor operation shake or electromagnetic interference, a filter with fixed parameters is usually adopted in the prior art, but the method inevitably causes phase lag of a control system, and the lag time slightly fluctuates along with the change of the operation speed. In a high-speed running state, the hysteresis effect is extremely easy to induce low-frequency resonance of the system, so that periodic transverse waves are generated on the surface of the aluminum foil, the defects are difficult to repair through subsequent procedures, the flatness and the specular glossiness of the product are seriously affected, and the qualified product rate is reduced. In addition, the propagation of tension fluctuation in the aluminum foil has inherent physical time delay, and is influenced by the material, thickness and running line speed of the aluminum foil, and a certain time is required for the disturbance signal of the front stage roller system to reach the rear stage roller system. The existing deviation correcting mechanism is lack of accurate perception and real-time calculation of time-varying relation between the linear velocity and the physical distance between roller systems, so that the regulation is usually started after fluctuation has produced destructive influence and the aluminum foil has obvious defects, and the hysteresis deviation correcting mode is difficult to meet the strict requirement of precision molding on the flatness of the aluminum foil, so that the product quality of a production line is restricted. Disclosure of Invention The invention provides a self-adaptive tension regulation and control method for precision molding of a mirror aluminum foil, which aims to solve the technical problems of reduced surface flatness caused by resonance ripple and control hysteresis due to tension coupling in the molding of an ultrathin aluminum foil in the prior art. The invention provides a self-adaptive tension regulating and controlling method for precisely forming a mirror aluminum foil, which comprises the following steps: S1, acquiring all-element working condition data in the mirror aluminum foil forming process, wherein the all-element working condition data comprise a feedback tension value, a linear speed and a driving rotating speed of a main driving motor; S2, evaluating stability confidence indexes according to the feedback tension value and the linear speed, and judging that the tension deviation belongs to systematic errors or random interference through the stability confidence indexes; s3, dynamically mapping bandwidth sensitivity based on stability confidence indexes and driving rotating speeds, and adjusting the perceived bandwidth of a control system through the bandwidth sensitivity so as to realize mechanical noise suppression in different rotating speed intervals; and S4, carrying out decoupling calculation by utilizing a phase advance attenuation factor constructed based on the inter-stage physical span in combination with the feedback tension value, the bandwidth sensitivity and the linear speed, and outputting a tension regulation and control instruction. The invention has the advantages of abandoning the traditional method of purely relying on tension values, establishing a multi-dimensional working condition sensing field by fusing full-element data of linear speed and motor rotating speed, creatively introducing stability confidence indexes, endowing a control system with human-like distinguishing capability from a mathematical statistics layer, accurately distinguishing random mechanical noise interference from substantial system tension deviation, avoiding ineffective oscillation caused by blind following of a high-frequency noise point by a controller, dynamically adjusting