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介绍了一种用于旋转飞行器单通道控制的无驱动结构硅微机械陀螺。陀螺利用旋转飞行器的滚转作为驱动,敏感任意方向的横向角速度。在陀螺冲击试验中,陀螺冲击响应信号的幅度和宽度较大。在实际应用中,幅度超过1.5 V、宽度超过100 ms的冲击响应信号有能力阻塞旋转飞行器控制信号通道,影响旋转飞行器正常飞行。对陀螺冲击响应信号产生的原因进行了分析,分析表明,由于陀螺摆片偏心,陀螺在受到厚度方向的冲击时摆片绕扭转梁发生了偏摆。提出了通过增加陀螺扭转梁厚度的方法,减小陀螺在单位冲击加速度下的摆角幅度。通过实验证明,如果陀螺扭转梁增厚从48μm增加到75μm,陀螺冲击响应信号的幅度和宽度将减小约18倍。
A kind of micromechanical gyroscope without driving structure is introduced for single-channel control of rotary aircraft. The gyroscope uses the rotation of the gyroplane as a drive and senses the lateral angular velocity in any direction. In the gyro impact test, the amplitude and width of the gyro impact response signal are large. In practical applications, impulse response signals exceeding 1.5 V in width and more than 100 ms in width have the ability to block the control signal path of the rotating aircraft and affect the normal flight of the rotating aircraft. The causes of the gyro impact response signal are analyzed. The analysis shows that due to the eccentricity of the gyro pendulum, the gyro is biased around the torsion beam when it is impacted by the thickness direction. The method of reducing the gyroscope’s swing angle under unit impact acceleration is proposed by increasing the thickness of the gyroscope torsion beam. Experiments show that if the gyro torsional beam thickening increases from 48μm to 75μm, the amplitude and width of the gyro impact response signal will be reduced by about 18 times.