Research on Angular Vibration Measurement Method of Spacecraft in Orbit

Angular vibration environment of sensitive components such as large optical cameras and laser devices will directly affect the imaging quality. Angular vibration is an important parameter for indirectly evaluate imaging quality. The current angular vibration measurement equipment is large and heavy, so it is difficult to be directly installed around the sensitive devices for the direct measurement of the angular vibration parameters. According to the measurement requirement of angular vibration, an indirect measurement method based on the linear acceleration is proposed in this paper. The linear vibration sensor is reasonably arranged, and the angular vibration measurement model based on linear acceleration is established. The method is verified by the ground and in orbit angle vibration measurement, and compared with the measurement value of the angular vibration sensor. The measurement results show that the deviation of the angular vibration parameters is within 10%. The method has the characteristics of convenient implementation, high measurement accuracy, and direct measurement of sensitive devices. Research achievement in this paper can provide an important reference for the measurement of angular vibration environmental parameters of various sensitive devices in orbit.