Method for identification of rotational inertia of AC servo

A technology of AC servo and moment of inertia, applied in the field of inertia identification, can solve the problems of difficulty in online identification and inability to directly measure non-electrical physical quantities, and achieve the effects of high inertia accuracy, simple implementation and convenient use.

Inactive Publication Date: 2008-07-30
ESTUN AUTOMATION TECH
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Problems solved by technology

[0007] The technical problem to be solved by the present invention is: the AC servo control system needs to identify the moment of inertia of the system, and the moment of inertia of the system is a non-electrical physical quantity that cannot be directly measured, so it is difficult to identify it online

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  • Method for identification of rotational inertia of AC servo
  • Method for identification of rotational inertia of AC servo
  • Method for identification of rotational inertia of AC servo

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Embodiment Construction

[0036] The present invention regards the load inertia and the rotor inertia of the motor as an overall inertia. During the operation of the AC servo system, only when the rotational speed of the motor changes, the identification of the rotational inertia is meaningful, so the servo system is accelerated and decelerated. Movement, get the system output torque and the average motor speed during this period, get the average torque of the servo system from the system output torque, and then according to the average speed of the motor, the average torque of the servo system and the total time of system acceleration and deceleration, The value of the overall inertia is obtained, and the moment of inertia of the AC servo system is identified.

[0037] The method of the present invention will be described below in conjunction with specific examples. Fig. 1 is the realization block diagram of the method of the present invention in the AC servo control system based on DSP, wherein space...

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Abstract

The invention relates to a rotary inertia identification method of an alternating-current servomechanism, the load inertia and the rotor inertia of a motor are regarded as a whole inertia, a servo system does an accelerated motion and a decelerated motion, so as to obtain the system output torque and the motor average rotate speed for a period of time. The average torque of the servo system can be obtained by the system output torque, the value of the whole inertia can be obtained according to the motor average rotate speed, the average torque of the servo system, and the total operation time of the accelerated motion and the decelerated motion of the system, that is, the rotary inertia of the alternating-current servomechanism can be identified. The invention does not need to singly identify the load inertia or the load torque for identifying the system rotary inertia, but causes the load inertia and the motor rotary inertia to be regarded as an inertia, and the identification of the system rotary inertia can be realized by combining the system output torque. The implementation of the method is simple, the use is convenient, the identified inertia precision is higher, and the method can be applied to the servo system inertia detection of a permanent magnetism synchronous servo-actuator.

Description

technical field [0001] The invention relates to the motion control of an AC servo system, and is specifically an inertia identification method of an AC servo system. Background technique [0002] With the continuous development of modern industry, the application of AC servo control system is more and more extensive, and the high-performance fully digital servo control system is the development trend of contemporary AC servo control system. This system is widely used in high-precision CNC machine tools, In robots, special processing equipment and fine feeding systems, the performance requirements are getting higher and higher, especially in the military field and robot systems, the servo control system is required to have high speed, high precision, high reliability and high Anti-interference ability. Due to the application of digital signal processing chip DSP, which integrates high-speed computing capability and high-efficiency motor-oriented control capability, the AC se...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M1/10G05B11/32
Inventor 王晓伟易健
Owner ESTUN AUTOMATION TECH
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