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Method and system for identifying rotational inertia of alternating current servo system

A technology of AC servo and moment of inertia, applied in the field of moment of inertia identification method and system, can solve the problems of low accuracy of moment of inertia, not considering system viscosity coefficient, etc., achieve accurate identification, eliminate the influence of viscosity coefficient, and achieve high precision Effect

Inactive Publication Date: 2012-07-04
SHENZHEN SINE ELECTRIC
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Problems solved by technology

[0005] The purpose of the embodiments of the present invention is to provide a method for identifying the moment of inertia of an AC servo system, which aims to solve the problem of low precision of the moment of inertia in the prior art due to the lack of consideration of the viscosity coefficient of the system

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  • Method and system for identifying rotational inertia of alternating current servo system
  • Method and system for identifying rotational inertia of alternating current servo system
  • Method and system for identifying rotational inertia of alternating current servo system

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Embodiment Construction

[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] The present invention provides a method for identifying the moment of inertia of an AC servo system. The method is as follows: figure 2 shown, including the following steps:

[0022] S21. In the first shifting stage of the AC servo system, obtain the time, speed change value and average torque of the first shifting stage, and obtain the motion equation of the first shifting stage;

[0023] S22. In the second speed change stage of the AC servo system, the time, speed change value and average torque of the second speed change stage are obtained, and the motion equation of the second speed ch...

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Abstract

The invention is applicable to the field of motors, and provides a method and a system for identifying the rotational inertia of an alternating current servo system. The method comprises the following steps of: acquiring time, a speed change value, and an average torque of a first speed change stage at the first speed change stage of the alternating current servo system to obtain a first speed change stage motion equation; acquiring time, a speed change value and an average torque of a second speed change stage at the second speed change stage of the alternating current servo system to obtain a second speed change stage motion equation; and calculating rotational inertia according to the difference between the first speed change stage motion equation and the second speed change stage motion equation, wherein the average speed of the first speed change stage is the same as that of the second speed change stage. The technical scheme has the advantages of high identification accuracy of the rotational inertia.

Description

technical field [0001] The invention belongs to the field of motors, and in particular relates to a method and system for identifying a moment of inertia of an AC servo system. Background technique [0002] High-performance AC servo system is a high-end technology product, which plays an important role in aerospace, military, robotics and precision CNC machine tools. As an actuator, the AC servo system has the advantages of high precision, good stability, fast response, wide speed range and large low-speed torque compared with other electromechanical devices. The approximate dynamic structure diagram of the existing AC servo drive system is as follows: figure 1 As shown, in different application scenarios, the performance of the AC servo system is greatly affected by the load disturbance and the moment of inertia, especially the moment of inertia has a greater impact on the performance of the servo system, and because the moment of inertia is a physical quantity that is dif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M1/10
Inventor 王军干
Owner SHENZHEN SINE ELECTRIC
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