Axial dynamic characteristic parameter identification method of ball screw feeding system
A technology of dynamic characteristics and ball screw, which is applied in special data processing applications, testing of mechanical components, testing of machine/structural components, etc. It can solve low reliability, difficult parameters of ball screw rolling joints, and complicated calculation process cumbersome and other problems, to achieve the effect of accurate identification
Pending Publication Date: 2021-02-26
LANZHOU UNIVERSITY OF TECHNOLOGY
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Problems solved by technology
In the above studies, due to the complex and cumbersome calculation process of the theoretical calculation method and low reliability, and the poor versatility of the experimental test method and can only identify the dynamic characteristic parameters of a single joint, it is difficult to obtain the dynamic characteristic parameters of a single joint by combining theoretical calculation methods and experimental tests. For many reasons such as modal testing of guide rails, bearings and other components, it is difficult to identify the parameters of the rolling joint of the ball screw feed system
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[0020] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0021] 1. Introduction of ball screw feed system
[0022] The typical structure of the ball screw feed system involved in the present invention, such as figure 1 As shown in the figure, 1 is the servo motor, 2 is the coupling, 3 is the left bearing seat, 4 is the left bearing group, 5 is the screw nut pair, 6 is the nut seat, 7 is the screw, 8 is the workbench, 9 is the right bearing group, and 10 is the right bearing seat. The AC servo motor 1 drives the screw 7 to rotate through the coupling 2, and converts the rotary motion into a linear motion through the screw nut pair 5, so that the worktab...
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The invention discloses an axial dynamic characteristic parameter identification method for a ball screw feeding system. The method comprises the following steps: S1, simplifying the ball screw feeding system to establish an axial vibration equation of a screw and a workbench under the action of simple harmonic force; S2, establishing a rolling joint part axial dynamic characteristic parameter identification model based on the axial vibration equation; and S3, establishing an objective function according to the parameter identification model and the related parameters, and solving the objective function based on an improved sine and cosine algorithm to identify the axial dynamic characteristic parameters. The improved sine and cosine algorithm is provided and applied to parameter identification of the ball screw feeding system, the result of rigidity and damping parameter identification of the feeding system shows that the error is within 6.25%, and the effectiveness and correctness ofthe improved sine and cosine algorithm provided by the invention are verified.
Description
technical field [0001] The invention belongs to the technical field of ball screw feed systems, in particular to a method for identifying axial dynamic characteristic parameters of a ball screw feed system. Background technique [0002] The ball screw feed system is a system composed of ball screw pairs, rolling guide rail pairs, left and right bearing groups, worktables, bearings and servo motors and other components connected by different types of joints. The dynamic performance of the whole machine not only depends on It depends on each component, and has an important relationship with the dynamic characteristic parameters of the joint. The research shows that the stiffness and damping of the joint are the key parameters for the theoretical modeling of the ball screw feed system, the optimization of dynamic characteristics and the control design of the servo system. Therefore, how to correctly and efficiently identify the dynamic characteristic parameters of the joint ha...
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IPC IPC(8): G01M13/028G06F30/20G06F30/17
CPCG01M13/028G06F30/17G06F30/20
Inventor 吴沁谌国章杨建军张洁王富强杨辰煜
Owner LANZHOU UNIVERSITY OF TECHNOLOGY