On-line rotational inertia identification device for alternate current permanent magnet servo system and identification method

A moment of inertia and servo system technology, applied in the direction of controlling electromechanical transmission devices, control systems, vector control systems, etc., can solve problems such as adjusting system control parameters

Inactive Publication Date: 2012-02-15
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem that the existing identification of the moment of inertia of the motor is to identify the moment of inertia of the load mechanical system in an offline state, and the problem that the system control pa

Method used

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  • On-line rotational inertia identification device for alternate current permanent magnet servo system and identification method
  • On-line rotational inertia identification device for alternate current permanent magnet servo system and identification method
  • On-line rotational inertia identification device for alternate current permanent magnet servo system and identification method

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specific Embodiment approach 1

[0055] Specific implementation mode one: the following combination figure 1 and figure 2 Describe this embodiment, the online moment of inertia identification device of the AC permanent magnet servo system described in this embodiment, it includes a position controller 1, a speed controller 2, a torque controller 3, a motor and a load unit 4, and a photoelectric encoder 5 , it also includes a differential unit 6, a sinusoidal signal generator 7 and a moment of inertia identification unit 8,

[0056] The sine wave signal output by the sine signal generator 7 is superimposed with the given position signal of the motor to generate a control signal and input it to the control signal input terminal of the position controller 1, and the position control signal output terminal of the position controller 1 is connected to the speed of the speed controller 2 The control signal input terminal, the torque control signal output terminal of the speed controller 2 is connected to the torq...

specific Embodiment approach 2

[0070] Embodiment 2: This embodiment is a further description of Embodiment 1. The moment of inertia identification unit 8 in this embodiment includes a filter.

specific Embodiment approach 3

[0071] Embodiment 3: This embodiment is a further description of Embodiment 2, and the filter described in this embodiment is a double-T network notch filter.

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Abstract

The invention discloses an on-line rotational inertia identification device for an alternate current permanent magnet servo system and an identification method, belongs to the technical field of servo motor control, and solves the problem that the conventional identification of rotational inertia of all motors is identification of rotational inertia of load mechanical systems in an off state so as not to adjust system control parameters according to current conditions of a system in real time. The device consists of a position controller, a speed controller, a torque controller, a motor and load unit, a photoelectric encoder, a differential unit, a sinusoidal signal generator and a rotational inertia identification unit; and the method comprises the following steps of: injecting a harmonic command with a lower amplitude value to a given position of a position loop motor during production run of a motor system; and extracting a motor position angle and torque control signal of a corresponding frequency component to realize on-line identification of the rotational inertia. The device and the method are suitable for on-line rotational inertia identification of the alternate current permanent magnet servo system.

Description

technical field [0001] The invention relates to an online moment of inertia identification device and identification method of an AC permanent magnet servo system, belonging to the technical field of servo motor control. Background technique [0002] In recent years, more and more AC permanent magnet servo systems are used in the field of small and medium power servos that require high precision and high performance. Due to its small inertia and high control precision, the change of the moment of inertia of the load mechanism affects the performance of the servo system to a large extent. When the electrical and mechanical parameters of the servo system do not match in actual application, it is necessary to adjust the parameters of the controller according to the actual operating conditions to meet the requirements of the production application for the performance of the servo system. This kind of parameter adjustment often requires technical personnel with certain professio...

Claims

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Application Information

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IPC IPC(8): H02P23/14H02P21/14
Inventor 杨明牛里徐殿国
Owner HARBIN INST OF TECH
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