Six-Axis Unit of Apparent Acceleration Meters Based on a Precision Quartz Pendulum Accelerometer with Digital Feedback for Control Systems of Soyuz-MS and Progress-MS Spacecrafts

The paper studies a number of problems related to the modernization of a six-axis unit of apparent acceleration meters (originally abbreviated as the “BILU” device), which is being used as part of the Soyuz spacecraft (SC) control system since 2002. It is shown that the use of a quartz pendulum accelerometer with digital feedback expanded the functional capabilities of the device, helped to practically realize the import substitution policy, and made it possible to introduce the device to the Progress-MS control system. The developed device has passed all types of ground testing and has been supplied to RSC Energia since January 2019.