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Self-adaptive high-order vibration active control method for mechanical refrigerator

A mechanical refrigeration and active control technology, applied in mechanical oscillation control, non-electric variable control, household refrigeration equipment, etc., can solve problems such as sensor interference, imaging blur, interference, etc., achieve good convergence and robustness, and satisfy multiple requirements Effect of order noise, wide application space

Inactive Publication Date: 2020-09-29
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The vibration of the mechanical refrigerator will cause great harm to the instrument; the vibration will drive the detection device connected to the cold finger to reciprocate, which will deviate from the normal "focus depth" range of the optical system of the instrument, resulting in blurred imaging, which will affect the resolution and accuracy of the detection target. Decreased positioning accuracy; vibration will cause electromagnetic interference signals, and even cause mechanical resonance of the instrument, which will cause greater interference to some sensitive sensors

Method used

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  • Self-adaptive high-order vibration active control method for mechanical refrigerator
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  • Self-adaptive high-order vibration active control method for mechanical refrigerator

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Embodiment Construction

[0050] The specific content of the present invention will be further described below in conjunction with the accompanying drawings, but the specific embodiments of the present invention are not limited thereto. All those that realize the functions of the present invention according to the inventive spirit, characteristics, modes and functions of the present invention are within the protection scope of the present invention.

[0051] refer to figure 1 As shown, the present invention is realized through the following technical solutions: a method for adaptive high-order active vibration control of a mechanical refrigerator, and the active vibration control method includes the following steps:

[0052] (1) Output the drive control signal x(n) to two opposing linear motors in the mechanical refrigerator.

[0053] (2) x(n) is used as a reference signal to collect the initial vibration signal e(n), which is input to a controller integrated with an adaptive high-order vibration acti...

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Abstract

The invention discloses a self-adaptive high-order vibration active control method for a mechanical refrigerator, and the method comprises the following steps: (1) transmitting an AC drive control signal x (n) into the mechanical refrigerator, and driving a linear motor; (2) inputting the AC drive control signal x (n) as a reference signal and an acquired vibration signal e (n) into a self-adaptive high-order vibration active controller together to generate a shock absorber drive control signal y (n); (3) inputting the generated shock absorber driving control signal y (n) into a shock absorber, driving the shock absorber to output a shock absorption force y '(n), counteracting a vibration force d (n) generated by the refrigerator, and collecting and updating a vibration signal e (n); and (4) inputting the collected and updated vibration signal e (n) and the AC driving control signal x (n) into the self-adaptive high-order vibration active controller again to generate a new y (n), and returning to the step (3). The mean square error of e (n) is minimized by means of iteration between the step (3) and the step (4). Actual measurement proves that when the method is used for actively controlling the high-order vibration of the mechanical refrigerator, rapid and effective convergence suppression of each order can be realized.

Description

Technical field: [0001] The invention relates to a mechanical refrigerator self-adaptive high-order active vibration control method, which is suitable for scenes that require the application of a mechanical refrigerator to provide a low-temperature environment but have high vibration requirements, such as precision optical loads. The invention can quickly and adaptively reduce the vibration interference of multi-order frequencies, improve the stability of the refrigerator, and is of great significance to scenarios such as aerospace precision optical loads. Background technique: [0002] Mechanical refrigerators have large cooling capacity, low cooling temperature, high efficiency, small size, and light weight, which meet the temperature requirements for normal work of infrared detectors and superconducting filters. With the successful development of the Oxford-type Stirling refrigerator in the late 1980s, the life and reliability of the mechanical refrigerator have been grea...

Claims

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Application Information

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IPC IPC(8): G05D19/00G05D19/02F25D19/00F25D29/00
CPCF25D19/00F25D29/00G05D19/00G05D19/02
Inventor 杨宝玉张家昆倪天智吴亦农
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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