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A system and method for suppressing torsional vibration of an AC servo system

A technology of AC servo and torsional vibration, which is applied in the field of servo control, can solve problems such as complex engineering implementation, and achieve the effects of strong adaptability, improved dynamics, and shortened algorithm cycle

Active Publication Date: 2018-01-19
SHANGHAI RADIO EQUIP RES INST +1
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  • Description
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  • Application Information

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Problems solved by technology

The high-order H∞ controller can be applied to the actual system. Compared with the traditional PI speed control, this method has significantly improved robustness and dynamic response, and can effectively suppress torque rotation and disturbance, but the engineering implementation is relatively complicated

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  • A system and method for suppressing torsional vibration of an AC servo system
  • A system and method for suppressing torsional vibration of an AC servo system
  • A system and method for suppressing torsional vibration of an AC servo system

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Embodiment Construction

[0040] The present invention will be further elaborated below by describing a preferred specific embodiment in detail in conjunction with the accompanying drawings.

[0041] Such as figure 1As shown, a system for suppressing the torsional vibration of an AC servo system has three loops in total, including a speed loop, a current loop and a current disturbance observer loop, wherein: the current disturbance observer is used as the inner loop of the current loop, and the current loop Also as the inner loop of the speed loop, specifically, the system includes: PID algorithm unit 101, as the controller of the speed loop; IIR low-pass filter 102, its input end is connected with the output end of the described PID algorithm unit 101, with In suppressing the middle and high frequency torsional vibration in the AC servo system; the resonant frequency detection unit 103 is used to detect the resonant frequency of the motor speed error signal to obtain the resonant frequency point; The...

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Abstract

The invention discloses a system for restraining torsional vibration of an alternating-current servo system and a method thereof. The method comprises following steps that a resonant frequency detection unit performs resonant frequency detection of motor rotation speed error signals so that resonant frequency points can be obtained; a self-adaption wave trap is capable of automatically tracking the resonant frequency points according to frequency point automatic adjustment parameters; an IIR low-pass filter restrains middle and high frequency torsional vibration in the alternating-current servo system; and a disturbance observer restrains disturbance outside the alternating-current servo system. Thus, restraint on torsional vibration of the alternating-current servo system is achieved. The invention also provides a system for restraining torsional vibration of the alternating-current servo system. By taking advantages of characteristics of FPGA parallel calculation, the system is high in real-time performance, and while dynamic nature of the alternating-current servo system is adequately ensured, torsional vibration of the alternating-current servo system is thoroughly restrained.

Description

technical field [0001] The invention relates to the technical field of servo control, in particular to a system and method for suppressing torsional vibration of an AC servo system. Background technique [0002] Due to the limited stiffness of the transmission device, a certain angular offset will be generated due to elastic deformation during the rotation process, which makes the displacement of each point in the mechanical system different. In the case of a given excitation frequency, the transmission device stores energy and will cause the transmission device to produce a phase-opposite angular offset, which increases the angular offset between the motor side and the load side, resulting in torsional vibration in the AC servo system . In actual industrial production, torsional vibration will reduce the accuracy and reliability of the AC servo system, and even cause system crashes and accidents, resulting in huge economic losses. In order to improve the control performan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P23/04
Inventor 许美健孙高吴雄君史颂华
Owner SHANGHAI RADIO EQUIP RES INST
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