Large-stroke high-accuracy intelligent flexible actuator

Abstract

The invention relates to a large-stroke high-accuracy intelligent flexible actuator which comprises a flexible hinge limiting barrel (1), a flexible hinge (2), a strut (3), a displacement sensor measured face (4), a displacement sensor (5), a limiting block (6), a top cover (7), a membrane spring combined layer (8), a rotor mounting cover (9), a voice coil motor (10), an outer barrel (11) and a bottom cover (12), wherein the voice coil motor (10) comprises a voice coil motor rotor (13) and a voice coil motor stator (14). After installation is completed, by adopting measurement feedback of thelarge-stroke high-accuracy eddy current displacement sensor (5) and control output of the large-stroke rapid response voice coil motor (10), vibration isolation, disturbance vibration inhibition and accurate pointing regulation of the intelligent flexible actuator are implemented. The intelligent flexible actuator disclosed by the invention is simple in structure, large in stroke and high in accuracy and can be widely applied to the fields of ultrahigh accuracy, ultrahigh stability and ultra-sensitive control of spacecrafts.

Description

technical field [0001] The invention belongs to the field of spacecraft control and relates to a flexible actuator. Background technique [0002] In recent years, with the introduction of a series of future mission requirements such as extremely high-resolution earth observation, high-stable tracking of space moving targets, and high-resolution imaging, extremely high requirements have been placed on the accuracy and stability of satellite control systems. [0003] Limited by the measurement accuracy and measurement bandwidth limitations of traditional attitude sensors (star sensors, gyroscopes), the traditional low-bandwidth attitude control system cannot effectively suppress the influence of various disturbance moments in a wide frequency domain, and only based on satellite attitude control The technical solution to realize the precise and stable pointing control of the payload has been difficult to meet the requirements of very high-precision pointing and stable control u...

AI Technical Summary

Problems solved by technology

[0003] Limited by the measurement accuracy and measurement bandwidth limitations of traditional attitude sensors (star sensors, gyroscopes), the traditional low-bandwidth attitude control system cannot effectively suppress the influence of various disturbance moments in a wide frequency domain, and only based on satellite attitude control The technical solution to realize the precise and stable pointing control of the payload has been difficult to meet the requirements of very high-precision pointing and stable control under the existing technical conditions; Vibration isolation, disturbance suppression and precise pointing of the actuator to achieve high performance indicators of the load

[0004] However, the currently used actuators are generally only equipped with vibration sensors (such as force sensors, acceleration sensors), so they only have the function of active vibration isolation, and do not have the function of precise pointing adjustment.

And the traditional ordinary hinges (such as ball hinges and Hooke hinges) are used at the joints of the actuators. Due to the existence of friction and gaps, the control output accuracy of the actuators is limited.

And with the continuous increase of satellite load, the continuous improvement of agile maneuvering and rapid stability, the current active vibration isolation actuators with small strokes can no longer meet the application requirements

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