Electric Lint Remover,Electric Rechargeable Epilators,Electric Quickly Clean Epilator,Customelectric Lint Remover ZHEJIANG SHENGFA ELECTRIC APPLIAMNCES CO.,LTD , https://www.sfelectricappliances.com "Summary" uses the basic principles of gyro mechanics to analyze the impact of the gyro accelerometer on the output of the instrument caused by the rotation of the centrifuge. It also proposes measures to improve the accuracy of the gyro accelerometer on the centrifuge. .
"Keywords" gyro accelerometer; centrifuge; just test accuracy
1 Introduction for analysis.
Gyroscope accelerometer is a kind of inertial instrument. It has excellent performances such as high accuracy and large measuring range. It can automatically integrate and give the flight speed of missiles and other carriers. It is widely used in high-precision inertial guidance systems.
As the accuracy of inertial guidance systems continues to increase, the accuracy requirements for gyro accelerometers are becoming higher and higher. Accurate testing of the gyro accelerometer, so as to improve its design and compensation, is very necessary to improve the accuracy of the system.
The gyroscope accelerometer centrifuge test is to use the centrifuge to generate continuous centripetal acceleration greater than one g as the input of the meter, in order to determine the performance of the gyroscope accelerometer at high acceleration input. Since the centrifuge test is carried out, the gyroscope accelerometer is clamped on the centrifuge rotating table body, and the rotation implicated motion affects the output of the instrument. This paper analyzes the principle of the additional gyroscopic torque on the gyro accelerometer due to the centrifuge's rotation involved in the experiment.
2 Principle of gyro accelerometer
The principle diagram of a gyro accelerometer based on a two-degree-of-freedom gyro is shown in Figure 1. The coordinate systems OX, YIZI and the outer ring frame are fixedly connected; OX, the input axis; coordinate system. % â€Is fixedly connected to the inner ring frame; d is the angular velocity of the outer frame relative to the instrument base; Kai is the angular velocity of the inner frame relative to the outer frame; ax is the acceleration of the input along the outer frame; ml is the pendulum around the axis of the inner frame The behavior is: the radius to the rotor center of mass; H is the angular momentum of the instrument. Under the acceleration ax, the gyro accelerometer generates an inertial moment mlax about the inner ring axis pointing in the negative direction of the axis, so that the gyro precesses around the outer ring, The precession angular velocity is d. Due to the precession angular velocity d, a gyro moment is generated around the inner ring pointing in the positive direction of the y-axis. If there is no outer ring interference torque Ha, the steady-state inertial moment mlax is flattened by the gyro moment
It can be seen that the rotation speed and rotation angle of the outer ring are proportional to the measured acceleration and measured speed, respectively, which is the working principle of the gyro accelerometer. In fact, the upper outer ring always has the interference torque Mx :, as shown in Figure 1. Therefore, when the instrument precesses around the outer ring axis, the angular momentum H will move in the direction of the Mxl vector, and the inner ring component will move around the y axis. If not restricted, the rotation angle R of the inner frame relative to the outer frame will gradually increase. Affect the normal operation of the gyro accelerometer. In order to avoid the above phenomenon, the accelerometer is equipped with a correction system, and the components 1,2,3 shown in Fig. 1 are its constituent parts. When the R angle occurs, the angle sensor outputs the corresponding voltage signal, which is amplified and corrected by the amplifier to control the torque motor on the outer ring shaft to produce a compensation torque MD equal to the outer ring interference torque Mx, equal in magnitude and opposite in direction In order to eliminate the adverse effect of the outer ring interference torque Mx, the rotation angle R is as small as possible, near the zero position, to ensure that H and the outer ring axis Ox are as vertical as possible, creating the necessary conditions for the normal operation of the instrument.
Research on Influence of Centrifuge Rotational Motion on Gyro Accelerometer Test Accuracy