Device and method for testing performance of magnetohydrodynamic inertia momentum wheel

Abstract

The invention discloses a device and a method for testing the performance of a magnetohydrodynamic inertia momentum wheel, and the method comprises the steps: enabling the magnetohydrodynamic inertiamomentum wheel which is pre-machined and assembled to be installed on an air-floating turntable with a photoelectric encoder, giving a test control signal through a data collection card through an upper computer, under the excitation of a power amplification drive circuit, synchronously collecting the input driving current of the magnetohydrodynamic inertia momentum wheel and the rotating speed ofthe air floatation turntable, and calculating to obtain the average flow velocity, the output torque and the angular momentum of the conductive fluid according to the rotating speed of the air floatation turntable, the rotating inertia of the air floatation turntable, the rotating inertia of a conductive fluid ring and the input driving current and a formula provided based on the angular momentumconservation principle and the working principle of the magnetohydrodynamic inertia momentum wheel. According to the invention, the actuating principle of the magnetohydrodynamic inertia momentum wheel can be indirectly verified, the output torque and angular momentum performance characteristics of the magnetohydrodynamic inertia momentum wheel are tested, and the blank in the field of magnetohydrodynamic inertia momentum wheel test experiment research is filled.

Description

technical field [0001] The invention belongs to the field of performance testing of new inertial devices, and in particular relates to a device and method for testing the performance of a magnetohydrodynamic inertial momentum wheel. Background technique [0002] The magnetohydrodynamic inertial momentum wheel is a new type of momentum wheel, its actuation characteristics are based on the magnetohydrodynamic effect, the core component is a conductive fluid ring, and the conductive fluid is placed in a closed torus channel. In the orthogonal magnetic field, it is driven by the Lorentz force to rotate and flow, and the torque output and angular momentum are realized through the interaction between the conductive fluid and the magnetic field. It can be used as the actuator in the micro-satellite attitude control system to realize the control and Stablize. [0003] Different from the traditional momentum wheel, the magnetohydrodynamic inertial momentum wheel uses the rotating fl...

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Problems solved by technology

[0003] Different from the traditional momentum wheel, the magnetohydrodynamic inertial momentum wheel uses the rotating flow of conductive fluid to output torque and angular momentum. Its theoretical research and performance index test need to obtain the fluid flow velocity of the momentum wheel under a certain input current, and the fluid is located in the closed In the torus channel, its rotational speed is difficult to measure directly; at the same time, the fluid flow state is easily affected by the internal shape of the pipeline, and general methods such as ultrasonic velocity measurement are difficult to apply; and the magnetohydrodynamic inertial momentum wheel is applied in the background of attitude control of microsatellites. The magnitude of the angular momentum and output torque provided is too small, and the static test method of the micro-torque sensor cannot meet the measurement accuracy requirements; and the experimental analysis and performance test of the magnetohydrodynamic inertia momentum wheel is inevitable for the practical development of the new momentum wheel need

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