Flywheel demonstration system and demonstration method thereof

Abstract

Provided is a flywheel demonstration system. The flywheel demonstration system comprises a bearing and a horizontally arranged rotary disc (2). The axis of the bearing is arranged in the vertical direction and the rotary disc is used for simulating a spacecraft and capable of rotating in a horizontal panel. A driving motor (3) is fixed on the rotary disc and connected with quality blocks (4) used for simulating flywheels of the spacecraft, and with a speed sensor used for detecting rotation speed of rotation shaft. An outer ring or an inner ring of the bearing (1) is connected with an angular displacement sensor used for detecting actual rotation angles of the rotary disc. The demonstration system fully simulates a space environment of a spacecraft. In a demonstration method, by identifying frictional resistance torque between the inner ring and the outer ring of the bearing and inputting the identified frictional resistance torque into a control system module, an accurate module is provided for the design of a control system; the control system is more stable; and the angle of the rotary disc is more stable.

Description

technical field [0001] The invention relates to a spacecraft demonstration system, in particular to a flywheel demonstration system and a demonstration method thereof. Background technique [0002] Flywheel system is an active control system widely used in spacecraft (star). The reaction torque caused by the continuous acceleration or deceleration of the flywheel acts on the stator of the driving motor fixed with the spacecraft, so that the spacecraft attitude changes to a stable state. The working principle of the flywheel system is the momentum moment theorem, namely The time derivative of the total momentum moment of the star (the sum of the momentum moment vectors of each component) is equal to the sum of the external moments acting on the star, especially when the sum of the external moment vectors is zero, the moment of momentum of the star is conserved. [0003] How to intuitively and realistically simulate the process of controlling the attitude of the spacecraft th...

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Problems solved by technology

[0004] In the prior art, few mentions have been made about the demonstration system of the spacecraft flywheel. Chinese patent 201410291394.0 discloses a method for simulating the moment of inertia of a spacecraft by using a speed-up flywheel inertia simulator. The spacecraft simulation part is driven by a motor to rotate. However, the celestial body is not driven by a motor to rotate during the actual operation, and the method of simulating its moment of inertia does not identify the frictional resistance moment in the system, but needs to ignore the frictional damping and the moment of inertia of the speed reducer, and calculate it The moment of inertia is an equivalent value obtained from its flywheel, and the calculated moment of inertia of celestial bodies will have a large error

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