Small rolling moment measuring device for hypersonic velocity wind tunnel
A torque measurement, hypersonic technology, applied in the field of small roll torque measurement devices, can solve the problems of coaxiality deviation and angular deviation, micro roll torque measurement deviation, and the development lag of hypersonic small roll torque measurement technology, etc. To achieve the effect of good stability and overcoming rust
Active Publication Date: 2014-11-26
CHINA ACAD OF AEROSPACE AERODYNAMICS
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Problems solved by technology
[0003] The development of domestic hypersonic small rolling moment measurement technology is relatively lagging behind. Some achievements have been made by the small rolling moment balance measurement system of the China Aerodynamic Research and Development Center and the air bearing measurement system of the China Academy of Aerospace Aerodynamics Technology. A brief overview of its shortcomings: Although the small rolling moment balance measurement system of China Aerodynamics Research and Development Center is the most conventional means of measuring rolling moment, the deviation of coaxiality and angle is the cause of the small amount of rolling moment measurement. Important Causes of Deviation
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[0021] The measurement system of the present invention is mainly composed of two parts: the warhead model part at the front end and the measurement and driving part at the rear end. The small asymmetric reentry body model is installed on the double-layer bearing support system, and a grating code disc is installed at the rear end of the double-layer bearing to measure the rotational speed of the model. The rear end of the pole is equipped with a servo motor, which is used to drive the inner layer bearing, so that the mechanical damping of the entire measurement system is theoretically zero.
[0022] Such as figure 1 , figure 2 As shown, the structure of the present invention includes a warhead model head 1, a warhead model tail 2, an outer sleeve 3, an outer sleeve retaining ring 5, a thrust bearing retaining ring 6, an impeller hub 7, a turbine blade 8, blade locking screws 9, Laser head bracket 11, model end cover 12, pole 13, transmission shaft 14, motor base 18, motor b...
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The invention discloses a small rolling moment measuring device for a hypersonic velocity wind tunnel. The small rolling moment measuring device mainly comprises two parts, namely a bullet model part at the front end and a measuring and driving part at the rear end. A slight asymmetric re-entry body model is arranged on a support system of a double-layer bearing; a grating coded disc is arranged at the rear end of the double-layer bearing and is used for measuring the rotating speed of a bullet model; and a servo motor is arranged at the rear end of a support rod and is used for driving an inner layer bearing so as to fulfill the aim that the mechanical damping of the whole measurement system is equal to zero in theory. According to the small rolling moment measuring device, the mechanical damping in the rolling direction is far smaller than the rolling aerodynamic damping of an aircraft in the rolling direction, and the mechanical damping is equal to zero in theory.
Description
technical field [0001] The invention relates to a small rolling moment measuring device used in a hypersonic wind tunnel, belonging to the field of experimental aerodynamics. Background technique [0002] The roll aerodynamic measurement test of a small asymmetric re-entry body requires the measurement device to have the following characteristics: 1. It can connect the ablated model and the strut; 2. The measurement device must have sufficient stiffness in the pitch direction and roll direction; 3. In the rolling direction, the mechanical damping of the measurement system is much smaller than the rolling aerodynamic damping of the aircraft in this direction, which is zero in theory. [0003] The development of domestic hypersonic small rolling moment measurement technology is relatively lagging behind. Some achievements have been made by the small rolling moment balance measurement system of the China Aerodynamic Research and Development Center and the air bearing measuremen...
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IPC IPC(8): G01M9/06
Inventor 解克
Owner CHINA ACAD OF AEROSPACE AERODYNAMICS