WO2022000788A1 - Structure de guidage magnétique de bobine mobile, table vibrante comportant la structure de guidage magnétique et procédé de réglage - Google Patents

Structure de guidage magnétique de bobine mobile, table vibrante comportant la structure de guidage magnétique et procédé de réglage Download PDF

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Publication number
WO2022000788A1
WO2022000788A1 PCT/CN2020/114784 CN2020114784W WO2022000788A1 WO 2022000788 A1 WO2022000788 A1 WO 2022000788A1 CN 2020114784 W CN2020114784 W CN 2020114784W WO 2022000788 A1 WO2022000788 A1 WO 2022000788A1
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WO
WIPO (PCT)
Prior art keywords
moving coil
cylinder
coil
controller
displacement sensor
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Application number
PCT/CN2020/114784
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English (en)
Chinese (zh)
Inventor
张雷雷
徐付新
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苏州苏试试验集团股份有限公司
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Application filed by 苏州苏试试验集团股份有限公司 filed Critical 苏州苏试试验集团股份有限公司
Publication of WO2022000788A1 publication Critical patent/WO2022000788A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M7/00—Vibration-testing of structures; Shock-testing of structures
    • G01M7/02—Vibration-testing by means of a shake table
    • G01M7/022—Vibration control arrangements, e.g. for generating random vibrations

Definitions

  • the invention relates to the technical field of vibration testing, in particular to a magnetic guiding structure of a moving coil, a vibration table having the same, and an adjustment method.
  • the electrodynamic vibration table can simulate various vibration mechanical environments, and is widely used in the simulation test of various typical vibrations such as auto parts, electronic components, and aerospace products stress screening.
  • the moving coil guide is particularly important, and the moving coil guide directly affects the distortion index of the table body.
  • the electric vibrating table at home and abroad guides the movement of the moving coil of the vibrating table.
  • the first one is the guide wheel guide mechanism 8, which is divided into upper and lower two groups of guide wheel guide mechanisms 8.
  • the upper and lower guides are divided into multiple groups of guide wheel guide components.
  • the advantage of the guide wheel guide mechanism 8 is that it is simple, and due to the The lower guide wheel guide mechanism 8 is small in size, and can directly install the air spring that supports the moving coil 3 and the weight of the test piece.
  • the disadvantage is that 1. Due to the direct contact and friction between the guide wheel guide mechanism 8 and the moving coil 3 components, the moving coil 3 is disturbed. 2.
  • the anti-eccentric load capacity of the guide wheel guide mechanism 8 is limited; 3.
  • the large displacement vibration is limited by the upper guide wheel guide mechanism 8, and the deflection angle cannot be too large, while the guide wheel guide mechanism 8 Possibly large.
  • the second type is the hydraulic static pressure guide mechanism 9, which is also divided into upper and lower groups.
  • the advantage is that the anti-eccentric load capacity is relatively large, and in theory, as long as the pressure is not lost and the remote components are not in contact; the disadvantage is that 1 . Due to the wide movement frequency range (5-3000Hz) of the moving coil 3 and the large movement acceleration (100g), it is very difficult for the oil seal to solve the problem of oil leakage; 2.
  • the support moving coil 3 and the weight of the test piece cannot be directly connected
  • the air spring can only seal the entire space of the shaker to form a large air chamber, which makes these seals difficult due to the connection between the shaker and the outside with water pipes and cables.
  • the technical problem to be solved by the present invention is to provide a moving coil magnetic guide structure, a vibration table and an adjustment method thereof, which can eliminate the shortcomings of the guide wheel guide structure and the hydraulic static pressure guide mechanism.
  • a magnetic guiding structure for a moving coil which is arranged between the moving coil and the cylinder body on the vibrating table, and includes an armature and an electromagnetic coil matched with the armature.
  • the electromagnetic coil is energized to form a magnetic field, and a gap is formed between the electromagnetic coil and the armature.
  • a displacement sensor for detecting the distance between the moving coil and the cylinder is arranged on the cylinder body, and a controller is arranged on the vibration table, and the controller receives the signal of the displacement sensor and controls the electromagnetic coil. the current.
  • the displacement sensor is a differential transformer type displacement sensor.
  • a vibrating table includes a cylinder support fixed on the ground, a cylinder set on the cylinder support, a moving coil located in the cylinder, a magnet set in the cylinder, and a winding wound on the moving coil
  • the above-mentioned magnetic guide structure is used as the upper guide assembly between the upper part of the moving coil and the cylinder, and the above-mentioned magnetic guide structure is used between the bottom of the moving coil and the cylinder as the lower guide assembly.
  • the lower guide components are four groups and are evenly distributed around the moving coil.
  • a method for adjusting the distance between a moving coil and a cylinder of a vibrating table is applied to the vibrating table, and there are at least three sets of magnetic guiding structures.
  • the adjusting method is as follows:
  • the controller compares the collected distance signals in multiple directions and calculates the difference in each direction.
  • the controller calculates the current in the electromagnetic coil in each direction according to the difference. size;
  • the controller outputs the current value to the electromagnetic coil to adjust the position of the moving coil so that the moving coil is in the center position.
  • the displacement sensor collects the distance information once, and the adjustment method is executed once.
  • the beneficial effects of the present invention are: through the cooperation of the electromagnetic coil and the armature, a gap is generated between them, and the moving coil is moved up and down in the gap, so as to achieve the purpose of no friction, and solve the problem of using the guide wheel guide mechanism and the hydraulic static pressure guide.
  • the defects caused by the mechanism can solve the problem of large low-frequency distortion of the moving coil of the shaking table, and at the same time, it can also reduce the problems of large wear and loss of the moving coil guide parts, and can also solve the problem that the guide parts have resonance and abnormal noise at low frequencies during use.
  • Fig. 1 is the structural representation of the first prior art
  • Fig. 2 is the structural representation of the second prior art
  • Fig. 3 is the structural representation of the present invention.
  • Fig. 4 is the structural representation of the upper guide assembly of the present invention.
  • Fig. 5 is the structural representation of the lower guide assembly of the present invention.
  • FIG. 6 is a schematic diagram of the adjustment method of the present invention.
  • a vibrating table includes a cylinder support 1 fixed on the ground, a cylinder 2 arranged on the cylinder support 1, a moving coil 3 located in the cylinder 2, and a cylinder 2 arranged in the cylinder 2.
  • the magnet 4 inside and the winding 5 wound on the moving coil 3 energize the winding 5 on the moving coil 3 to generate a magnetic field.
  • the magnetic field and the magnetic field of the magnet make the moving coil 3 vibrate at high and low frequencies.
  • An upper guide assembly 6 is set between the upper part of the moving coil 3 and the cylinder block 2
  • a lower guide assembly 7 is set between the bottom of the moving coil 3 and the cylinder block 2 and the upper guide assembly is connected to the lower guide assembly.
  • the guide components are all composed of magnetic guide structures.
  • the upper guide components are composed of 3 sets of magnetic guide structures.
  • the 3 sets of magnetic guide structures are evenly distributed around the moving coil, with an angle of 120° between the two;
  • the lower guide The component is composed of 4 sets of magnetic guide structures, which are evenly distributed around the moving coil 3, and the angle between them is 90°; the vibration table can choose different numbers of magnetic guide structures according to its size and the weight of the moving coil 3 Make settings.
  • the magnetic guide structure includes an armature 63 and an electromagnetic coil 62 matched with the armature 63 .
  • the armature 63 is fixed on the moving coil 3
  • the electromagnetic coil 62 is fixed on the cylinder through the guide seat 61 2
  • the guide seat 61 can fine-tune the distance between two adjacent electromagnetic coils 62
  • the electromagnetic coil 62 is energized to form a magnetic field
  • a gap is formed between the electromagnetic coil 62 and the armature 63
  • the upper guide assembly 6 The distances between each group of electromagnetic coils 62 and the armature 63 are equal, and the distances between each group of electromagnetic coils 62 and the armature 63 in the lower guide assembly 7 are equal, so as to ensure the smoothness of the moving coil 3 moving up and down.
  • a displacement sensor 64 for detecting the distance between the moving coil 3 and the cylinder body 2 is provided.
  • the displacement sensor 64 is arranged on the cylinder body 2 through a fixed seat.
  • a controller is set on the vibration table to monitor the moving coil 3 in real time through the displacement sensor 64.
  • the controller receives the signal of the displacement sensor 64 and controls the current of the electromagnetic coil 62 according to the change of the distance from the cylinder 2 .
  • the displacement sensor 64 adopts a differential transformer type displacement sensor. The advantages of the displacement sensor 64 are: 1. Taking micro-displacement as the measurement object; 2. High sensitivity and strong anti-interference ability; 3. There is a linear relationship between displacement and output.
  • the adjustment method of the controller to adjust the current output is:
  • the controller compares the collected distances in the three horizontal directions of the upper guide assembly 6 and calculates the difference between them.
  • the controller first calculates the distance in each direction according to these differences
  • the required force is calculated according to the force in each direction to obtain the required current in the electromagnetic coil 62 in each direction; the calculation methods of the four horizontal directions of the lower guide assembly 7 are the same as The calculation method is the same.
  • the controller outputs the current value of the electromagnetic coil 62 to adjust the position of the moving coil 3 so that the moving coil 3 is located at the center position; by increasing or decreasing the current value in the corresponding electromagnetic coil 62 to control the magnitude of the force in all directions to achieve Adjustment to the centering of the moving coil 3 position.
  • the above-mentioned displacement sensor 64 collects the distance information in real time, and performs the above-mentioned steps to adjust the position of the moving coil 3 every time it is collected until the position returns to the center. Centrally located.
  • the defects generated by the mechanism 9 can solve the problem of large low-frequency distortion of the moving coil 3 of the shaking table, and can also reduce the problems of large wear and loss of the guiding parts of the moving coil 3, and can also solve the problem that the guiding parts have resonance and abnormal sound at low frequencies during use.
  • the distance is collected by the displacement sensor 64, and the controller compares and calculates the distance and outputs the corresponding current to adjust the centering of the moving coil 3, realize automatic real-time adjustment, and improve the stability of the moving coil 3 movement.

Abstract

Structure de guidage magnétique (6, 7) d'une bobine mobile, table vibrante comportant la structure de guidage magnétique, et procédé de réglage. La structure de guidage magnétique comprend des induits (63) et des bobines électromagnétiques (62) adaptées aux induits (63) ; chaque bobine électromagnétique (62) est excitée afin de former un champ magnétique ; et un espace est formé entre la bobine électromagnétique (62) et chaque induit (63). Le procédé de réglage comprend les étapes suivantes : S1, collecte de position : collecter, au moyen de capteurs de déplacement (64), une distance entre une bobine mobile (3) et un cylindre (2), et renvoyer cette dernière à un dispositif de commande ; S2, traitement de signal : comparer, par le dispositif de commande, les signaux de distance collectés dans de multiples directions et à calculer une valeur de différence dans chaque direction, et calculer, par le dispositif de commande, en fonction de la valeur de différence, le courant de la bobine électromagnétique (62) dans chaque direction ; et S3, réglage de position : émettre en sortie, par le dispositif de commande, une valeur de courant vers la bobine électromagnétique (62) afin de régler la position de la bobine mobile (3), de telle sorte que la bobine mobile soit située à une position centrale. Le procédé peut résoudre le problème selon lequel la bobine mobile (3) de la table de vibration présente une forte distorsion basse fréquence, et peut également réduire les problèmes selon lesquels la structure de guidage (6, 7) présente une forte abrasion et une forte perte, et peut en outre résoudre le problème selon lequel la structure de guidage (6, 7) présente un son anormal résonnant à basse fréquence pendant l'utilisation.
PCT/CN2020/114784 2020-06-30 2020-09-11 Structure de guidage magnétique de bobine mobile, table vibrante comportant la structure de guidage magnétique et procédé de réglage WO2022000788A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202010621478.1A CN111649892A (zh) 2020-06-30 2020-06-30 一种动圈的磁性导向结构、具有其的振动台及调整方法
CN202010621478.1 2020-06-30

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WO2022000788A1 true WO2022000788A1 (fr) 2022-01-06

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113465852A (zh) * 2021-07-05 2021-10-01 苏州苏试试验集团股份有限公司 一种振动条件下振动系统的动态对中方法

Citations (8)

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JP2004219307A (ja) * 2003-01-16 2004-08-05 Akashi Corp 振動試験機
CN104483084A (zh) * 2014-12-08 2015-04-01 苏州苏试试验仪器股份有限公司 一种电动振动台的下部导向支撑装置
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CN207318039U (zh) * 2017-10-26 2018-05-04 苏州速尼科测试设备有限公司 振动台导向装置
CN207540751U (zh) * 2017-11-16 2018-06-26 苏州苏试试验集团股份有限公司 一种电动振动台的动圈上支撑与下导向装置
CN109211506A (zh) * 2018-10-30 2019-01-15 脉创测控装备科技（苏州）有限公司 试验设备、中心零位偏移控制装置及控制方法
CN210799741U (zh) * 2019-07-01 2020-06-19 中国航天科工飞航技术研究院（中国航天海鹰机电技术研究院） 调心磁悬浮轴承系统及发电机
CN212206530U (zh) * 2020-06-30 2020-12-22 苏州苏试试验集团股份有限公司 动圈的磁性导向结构及具有其的振动台

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004219307A (ja) * 2003-01-16 2004-08-05 Akashi Corp 振動試験機
CN104483084A (zh) * 2014-12-08 2015-04-01 苏州苏试试验仪器股份有限公司 一种电动振动台的下部导向支撑装置
CN105149199A (zh) * 2015-07-14 2015-12-16 北京卫星环境工程研究所 在航天器动力学离心状态下使用的电磁振动台
CN207318039U (zh) * 2017-10-26 2018-05-04 苏州速尼科测试设备有限公司 振动台导向装置
CN207540751U (zh) * 2017-11-16 2018-06-26 苏州苏试试验集团股份有限公司 一种电动振动台的动圈上支撑与下导向装置
CN109211506A (zh) * 2018-10-30 2019-01-15 脉创测控装备科技（苏州）有限公司 试验设备、中心零位偏移控制装置及控制方法
CN210799741U (zh) * 2019-07-01 2020-06-19 中国航天科工飞航技术研究院（中国航天海鹰机电技术研究院） 调心磁悬浮轴承系统及发电机
CN212206530U (zh) * 2020-06-30 2020-12-22 苏州苏试试验集团股份有限公司 动圈的磁性导向结构及具有其的振动台

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