基于单线振动台的角振动试验系统研究

目的 考核陀螺类产品在角振动环境下的适应性。方法 开发基于单线振动台的角振动试验系统，该系统以线角转换原理为依据，设计铰接机械结构，将线振动台的平动自由度转换为转动自由度。以角振动控制原理为依据，设计控制流程，实现闭环控制。结果 开展了角定频试验和角扫频试验，对系统的控制效果进行了验证。对比了线参数控制和角参数控制2种方法，结果表明，角参数控制法具有更高的控制精度。由于闭环控制的作用，角参数控制法可通过驱动电压的调整直接影响角参数值，从而抵消了部分由于系统连接、解耦或振动引入的误差。结论 该角振动试验系统解决了双台角振动旋转半径受限、线能力受限等问题，克服了摇摆台频带过窄的问题，为角振动试验提供一种新的实施方法。

Angular Vibration Test System Based on Single Line Vibration Table

The work aims to evaluate the adaptability of gyro products in the environment of angular vibration. An angular vibration test system based on a single line vibration table was developed. Based on the principle of line angle conversion, an articulated mechanical structure was designed to convert the translational freedom of the line vibration table into rotational freedom. Based on the principle of angular vibration control, the control flow was designed and the closed-loop control was realized. An angular constant frequency test and an angular sweep frequency test were carried out to verify the control effect of the system. The two methods of line parameter control and angle parameter control were compared. The result showed that the angle parameter control method had higher control precision. Because of the closed-loop control, the angle parameter control method could directly affect the angle parameter value through the adjustment of the drive voltage, so as to offset part of the error introduced by the system connection, decoupling or vibration. The angular vibration test system solves the problems of limited rotation radius and limited line capacity, overcomes the problem of too narrow frequency band of the swing table, and provides a new method for the angular vibration test.