Measuring Method of Rotating Projectile Roll Angular Rate
A measurement method and technology of roll angle, which are applied in the direction of using acceleration for speed measurement, speed/acceleration/impact measurement, measurement device, etc., which can solve the problems of inability to judge the forward and reverse rotation of the rotating bomb, high installation requirements, and poor measurement accuracy. , to achieve accurate real-time measurement, solve the problem of poor measurement accuracy and low cost
Inactive Publication Date: 2011-12-14
ZHONGBEI UNIV
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[0003] In order to solve the problems of poor measurement accuracy, high installation requirements, inability to judge the forward and reverse rotation of the rotating bomb, and high cost of the existing rotating bomb rotational speed measurement technology, the present invention provides a method for measuring the rolling angle rate of the rotating bomb
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[0014] A method for measuring the roll angular rate of a rotating projectile, the method is realized by the following steps:
[0015] 1) Install a MEMS accelerometer on the rotating projectile to ensure that the sensitive axis of the MEMS accelerometer is parallel to the rotating axis of the rotating projectile; 2) During the high-speed rotation of the rotating projectile, the MEMS accelerometer receives the Coriolis acceleration frequency signal Perform measurement and output; 3) FFT transform the Coriolis acceleration frequency signal output by the MEMS accelerometer through the signal processing circuit; 4) Calculate the FFT-transformed Coriolis acceleration frequency signal through the data acquisition circuit to obtain the rotation bomb Axial speed;
[0016] In the step 1), the number of MEMS accelerometers is two, and the two MEMS accelerometers are perpendicular to each other on the mounting surface.
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The invention relates to technologies for measuring rotational speeds of spinning projectiles and in particular to a method for measuring a transverse rolling angle rate of a spinning projectile. The invention solves the problems of poor measuring accuracy, high requirement for mounting, incapability of judging positive and negative rotations of the spinning projectile and high cost of the traditional technologies for measuring the rotational speeds of the spinning projectiles. The method for measuring the transverse rolling angle rate of the spinning projectile is realized by adopting the following steps of: (1) mounting an MEMS (Micro Electronic Mechanical System) accelerometer on the spinning projectile; (2) measuring a Coriolis acceleration frequency signal which is undergone by the MEMS accelerometer per se and outputting the Coriolis acceleration frequency signal by the MEMS accelerometer; (3) carrying out a FFT (Fast Fourier Transform) on the Coriolis acceleration frequency signal outputted by the MEMS accelerometer; and (4) calculating the Coriolis acceleration frequency signal which is subjected to the FFT. The method provided by the invention effectively solves the problems of poor measuring accuracy, high requirement for mounting, incapability of judging positive and negative rotations of the spinning projectile and high cost of the traditional technologies for measuring the rotational speeds of the spinning projectiles and is suitable for measurement of axial rotational speeds of the spinning projectiles.
Description
technical field [0001] The invention relates to the technology for measuring the rotating speed of a rotating projectile, in particular to a method for measuring the rolling angular rate of a rotating projectile. Background technique [0002] In the war, in order to improve the accuracy of hitting the target and the ability to penetrate the target of the rotating bomb, it is necessary to conduct precise guidance on the rotating bomb. The axial rotational speed of the rotating bomb is relatively high, generally reaching or even exceeding 30r / s, while the angular velocity in the pitch and yaw directions is much smaller, and the real-time measurement of the axial rotational speed of the rotating bomb is accurate for range correction and target implementation. Strike is important. At present, the measurement techniques for the axial speed of the rotating projectile mainly include the following types: 1. The rotational speed of the rotating projectile is measured in real time by...
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Inventor 张晓明刘俊李杰崔星李永慧陈国彬刘喆
Owner ZHONGBEI UNIV