Method for identification of rotational inertia of AC servo

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...

AI Technical Summary

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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