Recognization method for object rotary inertia having complex irregularity structure

A technology of moment of inertia and identification method, which is applied in the application field of measurement method and identification technology, and can solve the problems of large error in calculation results and lack of versatility

Inactive Publication Date: 2008-12-03
TSINGHUA UNIV
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Problems solved by technology

This method lacks versatility, and the error of the calculation result is relatively large.

Method used

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  • Recognization method for object rotary inertia having complex irregularity structure
  • Recognization method for object rotary inertia having complex irregularity structure
  • Recognization method for object rotary inertia having complex irregularity structure

Examples

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Embodiment Construction

[0084] An embodiment flow chart of a method for estimating the moment of inertia of an irregularly structured object based on the system identification technology proposed by the present invention is as follows Figure 4 As shown, it specifically includes the following steps:

[0085] 1. Use 4 identical springs (stubborn coefficient k=1.109×10 4 N / m 2) to support the object under test on a rigid beam. The support point is required to be symmetrical about the center of the object. The specific position is not limited, but it is better to be close to the edge of the object under test. In this example, figure 2 Middle A 1 、A 2 、A 3 、A 4 shown;

[0086] 2. Install 4 electromagnets on the measured object (electromagnetic constant K=1.660×10 -4 N m 2 / A 2 , mass m=1.320kg) and 4 displacement sensors (ST-1 eddy current sensor of Beijing Kunlun Coastal Sensing Technology Center), the installation position also needs to meet the symmetry, the specific position is not limited,...

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Abstract

Four pieces of spring installed symmetrically on rigid girder support underside of object to be measured. Also, four pieces of electromagnet are installed symmetrically on object to be measured in inner side of springs. Four pieces of displacement sensors are installed above object to be measured perpendicular to each electromagnet. Then, each electromagnet is connected to voltage-controlled current source and DSP in sequence. Inputting actuating signal to DSP make DSP output voltages twice for torsional pendulum of object to be measured in X, Y axes. Thus, moment of inertia around X, Y axes of the object and electromagnet can be evaluated from well known automated identification technique. Advantages are: strong adaptability, simple method, and high precision of recognition.

Description

technical field [0001] The invention relates to a method for identifying the moment of inertia of an irregularly structured object, which belongs to the technical field of object moment of inertia measurement, and in particular relates to a method for measuring the moment of inertia of a complex irregular object and the application of identification technology. Background technique [0002] In the design of some large-scale motion systems, the moment of inertia of the system is an important technical parameter. Taking a car as an example, its three-axis moment of inertia (the yaw moment of inertia J of the car around the vertical axis Z of its center of mass) z ;Moment of inertia J of pitching around the horizontal axis Y around its center of mass y ;Rolling moment of inertia J around the vehicle's rolling axis m-m m ) is an important technical parameter in vehicle driving dynamics. They have an important impact on the handling stability, ride comfort and driving safety o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M1/10
Inventor 冯超周彤
Owner TSINGHUA UNIV
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