A target target assembly and aerodynamic measurement system suitable for millinewton vacuum plume

Abstract

The invention provides a target module and an aerodynamic measurement system applicable to millinewton vacuum plume. The target module comprises a target connection rod, a first insulation and heat insulation device, a second insulation and heat insulation device, a third insulation and heat insulation device and a round target, wherein a first end of the target connection rod is connected with a force measurement crossbeam of a force measurement stand, the first insulation and heat insulation device, the round target, the second insulation and heat insulation device, a second end of the target connection rod and the third insulation and heat insulation device are sequentially connected through assembling, and tail mounting end faces of the first insulation and heat insulation device and the third insulation and heat insulation device are positioned in through holes of the second insulation and heat insulation device. The target module has the advantages that insulation and heat insulation properties of the target and a force measurement device are ensured, aerodynamic measurement within different ranges is achieved, the requirements of different electric thrusters can be met, and the target module is high in precision, simple in structure and easy to implement.

Description

technical field [0001] The invention relates to the technical field of vacuum plume dynamic measurement, in particular to a target assembly and an aerodynamic measurement system suitable for millinew level vacuum plume. Background technique [0002] At present, the plume formed when the aerospace attitude and orbit control engine is working will have a force effect on the spacecraft, which will cause the attitude disturbance of the spacecraft. Therefore, only by accurately obtaining the aerodynamic parameters of the thruster during operation can the influence of the aerodynamic force of the thruster on the spacecraft be reduced or avoided, and the design and development of the spacecraft can be optimized. [0003] First of all, the thrust of the attitude and orbit control engine is relatively small, especially the electric thruster is only tens or hundreds of millinewtons, so the aerodynamic force generated during its operation is also very small, and the measurement of aero...

AI Technical Summary

Problems solved by technology

If any target is used in the measurement of vacuum plume aerodynamics, the target itself or the force measurement equipment may fail due to high temperature, especially in the measurement of electric thrust vacuum plume aerodynamics, effects such as sputtering and sheath will be Affect the measurement of aerodynamic force, and it is possible that the entire measurement mechanism is non-electrically neutral during the measurement process, affecting the normal operation of the sensor

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