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Low-frequency-band disturbance suppression method based on acceleration measurement

A technology of acceleration measurement and disturbance suppression, which is applied in the direction of adaptive control, general control system, control/adjustment system, etc., can solve the problems of insufficient low-frequency disturbance suppression ability and inability to meet stability requirements, etc., to improve drift suppression ability and improve Disturbance suppression ability, good practical effect

Inactive Publication Date: 2019-04-26
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0003] Aiming at the problem that the low-frequency disturbance suppression capability of the control system is insufficient and cannot meet the higher-precision stability requirements, the present invention proposes a control scheme that can effectively improve the low-frequency disturbance suppression capability of the system

Method used

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  • Low-frequency-band disturbance suppression method based on acceleration measurement
  • Low-frequency-band disturbance suppression method based on acceleration measurement
  • Low-frequency-band disturbance suppression method based on acceleration measurement

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Embodiment Construction

[0020] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0021] like figure 1 Shown is a control block diagram of a low-frequency disturbance suppression method based on acceleration measurement, which includes the inner loop of the improved disturbance observation compensation controller, acceleration loop, speed loop and position loop; using the improved disturbance observation compensation controller method and the traditional Combining the three closed-loop methods of the system to further eliminate the influence of drift. On the premise of weakening the occurrence of integral saturation, the acceleration disturbance in the low-frequency band is fed forward in reverse to actively offset the influence of external disturbances, thereby improving the disturbance suppression in the low-frequency band of the system. ability. The specific implementation steps of adopting described devi...

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Abstract

The invention discloses a low-frequency-band disturbance suppression method based on acceleration measurement. The problem is solved that outside low-frequency disturbance exists in a control system and it is difficult to further improve the low-frequency-band disturbance suppression capability of the system by an accelerometer and a control method in the environment where a large amount of driftin a low frequency band. An improved disturbance observer structure and a designed special feedforward compensation controller are added based on the three closed loops of acceleration, speed and position. The low-frequency-band disturbance suppression method can eliminate most of the influence of the drift amount of an acceleration sensor, reversely feeds forward the outside disturbance amount ofthe low frequency band to a driving circuit to offset the influence of the outside disturbance, and effectively improves the low-frequency-band disturbance suppression capability of the system. The method optimizes the system in control algorithm, requires no additional sensor, saves cost and has good practicability, is easily implemented by engineering, and is also suitable for other sensors that have a large amount of drift due to low signal to noise ratio, and is used for suppressing the influence of the drifting amount of the sensors.

Description

technical field [0001] The invention belongs to the field of stability control, and in particular relates to a low-frequency disturbance suppression method based on acceleration measurement, which is mainly used for isolating base disturbances and improving the stability accuracy of motion platform stabilization equipment. Background technique [0002] In the control system, the stability accuracy of the system will be affected by external disturbances, such as ground vibration, vibration of the stable platform caused by perturbation caused by air flow. Especially for stability control equipment installed on aircraft, automobiles, and ships, there will be a large number of broadband disturbances on the stable platform due to the irregular movement of the installation carrier. Because the installation carrier is affected by the disturbance, the stability of the system will be greatly reduced, the stability accuracy will be reduced, and even the stability will be lost. In ter...

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Application Information

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IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 邓久强毛耀任维周翕何秋农
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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