Driving current based dynamic balance method of rotary table of double-axis precision centrifuge machine

A technology of precision centrifuge and driving current, applied in centrifuges and other directions, can solve the problems of complex operation and calculation process, low dynamic unbalance identification accuracy, and time-consuming, shortening dynamic balance time, high sensitivity and high identification accuracy. , Improve the effect of dynamic balance accuracy

Active Publication Date: 2019-06-07
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention: the purpose of the present invention is to provide a dynamic balancing method for the rotary table of a double-axis precision centrifuge based on the driving current, so as to solve the dynamic imbalance existing in the dynamic balancing method for the rotary table of a double-axis precision centrifuge Low identification accuracy, complex operation and calculation process, and time-consuming problems

Method used

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  • Driving current based dynamic balance method of rotary table of double-axis precision centrifuge machine
  • Driving current based dynamic balance method of rotary table of double-axis precision centrifuge machine
  • Driving current based dynamic balance method of rotary table of double-axis precision centrifuge machine

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specific Embodiment approach 1

[0040] Specific embodiment one: in conjunction with Fig. 1 (a), figure 2 and image 3 As shown, the implementation process of a method for dynamic balancing of a rotary table of a two-axis precision centrifuge based on driving current described in this embodiment is as follows:

[0041] Schematic diagram of the structure of the double-shaft arm precision centrifuge figure 2 As shown, the axis O of the rotary table of the double-axis arm precision centrifuge is defined as the origin of coordinates, the direction of the spindle center pointing to the axis of the rotary table on the same water surface as the axis of the rotary table is the positive direction of the x-axis, and the axis of the rotary table is upward The direction is the positive direction of the z-axis, and the direction of the y-axis is determined according to the right-hand rule; let the initial position of the static unbalanced particle be on the positive semi-axis of the x-axis, when the main shaft rotates at...

specific Embodiment approach 2

[0055] Specific embodiment two: the difference between this embodiment and specific embodiment one is that step three can also be implemented in the following manner, as shown in Figure 1(b):

[0056] Step 31. At the mechanical angular position φ of the turntable 1 Add a test weight of ξkg at -90°, collect the driving current data of the rotary table, extract the one-octave frequency component, and Do the difference to get the amplitude A of the double frequency of the current caused by the dynamic unbalance at this time m (m=2,3,...); Indicates that the driving current of the turntable before the mth counterweight is doubled;

[0057] Step 32. After each addition of trial weight, the amplitude A of the double frequency of the drive current of the turntable m Amplitude A of double frequency of the driving current of the turntable caused by dynamic unbalance when no trial weight is initially added 1 For comparison, when A m / A 1 When ≤20%, it is considered that the dyna...

Embodiment

[0059] Embodiment: The present invention is further described in detail in conjunction with accompanying drawings 1-7. A method for dynamic balancing of a rotary table of a two-axis precision centrifuge based on driving current described in the present invention can identify and balance dynamic unbalance in an ideal simulation It is carried out under the environment, without adding unfavorable factors such as friction, so there is no need to measure benchmark data.

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Abstract

The invention discloses a driving current based dynamic balance method of a rotary table of a double-axis precision centrifuge machine, and belongs to the technical field of mechanical rotor dynamic balance. In order to solve the problems that an existing dynamic balance method of a rotary table of a precision centrifugal machine is low in dynamic imbalance identification precision, complex in operation and calculation process, large in time consumption and the like, a double-shaft precise centrifugal machine main shaft is arranged to operate at a small rotating speed omega 0, and the rotary table operates at a rotating speed -omega 0 to collect the reference data of the driving current of the rotary table; the double-shaft precise centrifugal machine main shaft is arranged to be operatedat the working rotating speed omega, the rotary table operates at the rotating speed -omega, the driving current data of the rotary table are collected, and a one time frequency component of current is extracted; and the double-shaft precision centrifugal machine is arranged to operate at the rotating speed omega, accurate identification is carried out on the dynamic unbalance value of the rotarytable through a mode of adding test mass according to the obtained frequency multiplication of the current, and balancing is carried out. The method does not depend on any external precise sensor, theidentification precision of the shafting dynamic imbalance of the rotary table is higher, the method is simple and feasible, multiple experiments are not needed, and the method is more practical fromthe engineering application angle.

Description

technical field [0001] The invention relates to a precision centrifugal dynamic balancing method, in particular to a driving current-based dual-axis precision centrifuge rotary table dynamic balancing method, which belongs to the technical field of large-scale mechanical rotor dynamic balancing. Background technique [0002] The double-axis precision centrifuge is mainly used to provide a large overload environment for the verification of the navigation accuracy space-ground consistency test. It can carry out the large-overload navigation accuracy test of the control system, the space-ground consistency test of the inertial system, the error model verification and related calibration tests. In actual work, limited by the current technical level of mechanical manufacturing, processing, assembly, etc., as well as the mass distribution of the load itself and the installation positioning error, the main shaft and the rotary table of the double-axis precision centrifuge inevitably...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B04B9/14
Inventor 霍鑫单丙杰王玘玥张媛媛陈松林赵辉马杰陈维山姚郁
Owner HARBIN INST OF TECH
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