A Kinetic Disturbance Rotation Modulation Mechanism

Abstract

The invention relates to a dynamics disturbance rotation modulation mechanism. The dynamics disturbance rotation modulation mechanism is characterized in that a table body rotation shaft is connected with a first rotation table body and a second rotation table body through flexible joints, and a first set of accelerometers and a second set of accelerometers are evenly distributed and installed on the outer side of the first rotation table body and the second rotation table body respectively; an electromagnetic driving device is installed between the first rotation table body and the second rotation table body, and an angle sensor is installed at the bottom of the table body rotation shaft. According to the dynamics disturbance rotation modulation mechanism, the two rotation table bodies with the same inertia are driven by the electromagnetic device to periodically rotate at the relative-angle positions while a base torque motor drives the table bodies to rotate overall at a constant speed through the rotation shaft, angle acceleration modulation is achieved, the two movement table bodies have the angular momentum variations with the same numerical value and different directions, the angular momentum variations of the movement table bodies are close to zero, the reactionary torque of the whole table bodies relative to the base is also close to zero, and therefore the reactionary torque generated by modulation of angle acceleration modulation is inhibited.

Description

technical field [0001] The invention belongs to the field of rotational accelerometer type gravity gradiometer, in particular to a dynamic disturbance rotational modulation mechanism. Background technique [0002] The angular acceleration rotation modulation mechanism of the existing rotary accelerometer-type gravity gradiometer usually requires the motor on the base to provide high-frequency jitter drive. In this driving mode, the reaction torque acts directly on the base, making it difficult for the inertial platform to Maintaining a steady accuracy, which in turn leads to errors in gravity gradient measurements. At the same time, due to the large inertia of the rotating part of the table body, which is about 0.8kg*m2, in the process of motor selection, in order to meet the normal use, it is necessary to provide an additional driving torque of about 1Nm (accounting for more than 30% of the entire motor demand. ), resulting in a corresponding increase in motor size and dri...

AI Technical Summary

Problems solved by technology

[0002] The angular acceleration rotation modulation mechanism of the existing rotary accelerometer-type gravity gradiometer usually requires the motor on the base to provide high-frequency jitter drive. In this driving mode, the reaction torque acts directly on the base, making it difficult for the inertial platform to Maintains stable accuracy, which in turn leads to errors in gravity gradient measurements

At the same time, due to the large inertia of the rotating part of the table body, which is about 0.8kg*m2, in the process of motor selection, in order to meet the normal use, it is necessary to provide an additional driving torque of about 1Nm (accounting for more than 30% of the entire motor demand. ), resulting in a corresponding increase in motor size and drive power; and the size, weight, and design difficulty of the system are increased, and the application range is limited

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