Coordinate system establishing method and rigid mass center and inertial parameter testing method
A technology for establishing a method and a coordinate system, which is applied in the field of establishing a coordinate system and testing the center of mass of a rigid body and inertial parameters, and can solve the problems of low test efficiency and seldom use of static methods
Active Publication Date: 2021-05-18
十堰风神汽车橡塑制品有限公司
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Problems solved by technology
Since all the inertial parameters of the object cannot be obtained at one time, the test efficiency of the static method is low and is rarely used
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[0073] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout.
[0074] In the description of the present invention, it should be noted that for orientation words, such as the term "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", " Width", "Thickness", "Top", "Bottom", "Front", "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner ", "outside", "clockwise", "counterclockwise" and other indication orientations and positional relationships are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the Means that a device or element must have a specific orientation, be constructed...
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The invention discloses a coordinate system establishing method and a rigid mass center and inertial parameter testing method. The method comprises the steps of: establishing a geodetic coordinate system, a reference coordinate system, a conjoined coordinate system and a wobble plate coordinate system, and calculating the position relation among the coordinate systems; measuring the positions of the axis of a wobble plate in the reference coordinate system in different placement attitudes; calculating the coordinate of the center of mass of a tested object in the reference coordinate system; measuring the torsional pendulum period and the direction cosines of the axis of the wobble plate in the reference coordinate system under different placement attitudes; and calculating inertial parameters of the tested object about the center-of-mass coordinate system. According to the method, the mass center and the inertial parameters of an irregular rigid body can be measured, and the measurement of the mass center and the measurement of the inertial parameters are decoupled; the mass center of the tested object is ensured to fall on the axis of the wobble plate, and the test requirement is met; and a three-coordinate measuring instrument and an inclinometer are adopted for measurement and are combined with data processing methods such as a least square method, so that the method has the characteristic of high test precision.
Description
technical field [0001] The invention relates to the technical field of testing the center of mass and inertial parameters of a rigid body, in particular to a method for establishing a coordinate system and a method for testing the center of mass and inertial parameters of a rigid body. Background technique [0002] The position of the center of mass of the rigid body and the inertial parameters (including the moment of inertia and the product of inertia) about the center of mass coordinate system are important dynamic parameters of the rigid body. For the dynamic analysis of a mechanical system, an important prerequisite is to obtain the position of the center of mass and inertial parameters of each component in the mechanical system. In addition, the development and design of some vibration isolation mechanisms, such as the suspension mechanism of the automotive powertrain, requires the input of the center of mass and inertia parameters of the controlled object. Therefore,...
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IPC IPC(8): G01B21/04G01M1/10G01M1/12
CPCG01B21/04G01M1/10G01M1/122
Inventor 陈雪艳龚志豪上官文斌袁焱龙南毅张宁
Owner 十堰风神汽车橡塑制品有限公司