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Aircraft simulation air bearing table inertia regulating and measuring device and method

A technology of aircraft simulation and measurement device, which is applied in the field of measurement and can solve problems such as unsuitable air flotation table

Inactive Publication Date: 2015-12-30
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Chinese invention patent application number: CN201410484621.1, the patent name is "a method and device for online measurement of rotary inertia of rotating body", which connects the rotating body to be measured with the measuring equipment, and installs different standard inertia disks to control the time synchronization system When performing a falling body experiment, the data acquisition system records the displacement data to obtain the moment of inertia of the tested rotating body, but this method is not suitable for the measurement of the moment of inertia of the air bearing table

Method used

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  • Aircraft simulation air bearing table inertia regulating and measuring device and method
  • Aircraft simulation air bearing table inertia regulating and measuring device and method
  • Aircraft simulation air bearing table inertia regulating and measuring device and method

Examples

Experimental program
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Effect test

Embodiment 1

[0034] combine Figure 1-2 , an aircraft simulated air flotation platform inertia adjustment and measurement device, comprising a base 1, an air flotation bearing pair 2, an experimental table 3, two trusses 4, an under-platform hanger 5 and a truss inertia adjustment module 6; the air flotation bearing pair 2 is installed on the base 1, the test table 3 is installed on the air bearing pair 2, the truss 4 is installed on both sides of the test table 3, the under-platform hanger 5 is installed under the test table 3, and the truss inertia adjustment module 6 is installed in on truss 4. The base 1 is the bearing foundation of the whole system, the test table 3 is the installation area of ​​the test load, and the installation reference and fixing screw holes of various mounting brackets are reserved. The supporting device can also be used to increase or decrease the mass block for inertia adjustment. The two trusses 4 are symmetrically installed on both sides of the experimental...

Embodiment 2

[0036] A method for adjusting and measuring the inertia of an aircraft simulated air-floating platform obtained by using the aircraft simulated air-floating platform inertia adjustment and measuring device as described in Embodiment 1, the steps are:

[0037] The first step: rough adjustment, using theoretical calculation, pre-allocate the inertia on the computer design model, select or replace the appropriate size of the counterweight and install it on the truss inertia adjustment module; when assembling the weight, it needs to be installed on the truss The discs at both ends are installed in pairs;

[0038] Step 2: After the equipment is installed, measure the moment of inertia of the system:

[0039] After the platform is floated and adjusted horizontally, the flywheel is used to drive the air-floating platform to generate an angular acceleration α 1 , then the thrust torque M exerted by the flywheel on the air flotation table is:

[0040] M=Jα 1 (1)

[0041] If the for...

Embodiment 3

[0056] The following example illustrates the adjustment and measurement adjustment method of the moment of inertia:

[0057] It is assumed that the moment of inertia of the air flotation table is calculated theoretically J=8000kgm 2 , when the moment of inertia of the additional mass ΔJ=100kgm 2 , the drive provided by the flywheel can make the angular velocity of the air-floating table reach 0.525° / s when there is no additional mass, and its action time Δt is 1s. 1 , and Δω can be obtained from equation (5) 2 . Then there are:

[0058] Δω 1 =0.525° / s; Δω 2 =0.5185° / s

[0059] When measuring, take the angle that the air flotation table travels within 30s after the force of the flywheel is cancelled, and find out:

[0060] S1 =15.75°; S 2 =15.555°

[0061] Among them, S 1 and S 2 are the ideal 30s intrinsic angular velocity increment Δω, respectively 1 and Δω 2 The angle that the air flotation table travels under the circumstances.

[0062] The position error of g...

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Abstract

The invention provides an aircraft simulation air bearing table inertia regulating and measuring device and method. The device comprises a base, an air bearing pair, an experiment table top, two trusses, under-table hanging bins and truss inertia regulating modules; the experiment table top is installed on the air bearing pair, the trusses are installed on the two sides of the experiment table top, the under-table hanging bins are installed under the experiment table top, and the truss inertial regulating modules are installed on the trusses; the trusses are symmetrically installed on the two sides of the experiment table top. The method comprises the steps that rough regulating is performed, a theoretical calculation mode is adopted, inertia predistribution is performed on a computer design model, and balancing weights with the appropriate specification are selected or replaced and installed on the truss inertia regulating modules; when the balancing weights are installed, the balancing weights need to be installed in pairs at discs arranged at the two ends of the trusses; rotary inertia of a system is measured; the calculated rotary inertia is compared with an expected set value, and mass blocks are increased and decreased in pairs at the discs arranged at the two ends of the trusses. The aircraft simulation air bearing table inertia regulating and measuring device and method are suitable for measurement of air bearing table rotary inertia, simple in principle and convenient to install and maintain.

Description

technical field [0001] The invention relates to measurement technology, in particular to a device and method for adjusting and measuring inertia of an aircraft simulated air-floating platform. Background technique [0002] The full physical ground simulation test of space vehicle is of great significance to the development of the aircraft. Its core equipment is an air flotation simulation system based on air flotation ball bearings. In the simulation design, the inertia characteristics of the system need to be measured and adjusted to meet the Therefore, it is of great significance to study the measurement and adjustment method of the moment of inertia of the simulated air-floating turntable of the aircraft. [0003] After searching the literature, it was found that Li Jisu, Mu Xiaogang, etc. introduced a large satellite in the paper "Full-Physical Simulation System of Large-scale Satellite Three-axis Air-floating Platform" (see "Control Engineering", 2001, No. 3, pages 22-2...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M1/10
Inventor 王常虹李莉夏红伟马广程解伟男
Owner HARBIN INST OF TECH
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