TELEMETRY DATA-BASED DETERMINATION OF THE DYNAMIC ISS
CHARACTERISTICS (TENZOR)
Research Area: Microgravity Environment Measurement
Expedition(s): 1-9
Principal Investigator(s): ● Mikhail Y. Belyaev, PhD, S. P. Korolev Rocket and Space
Corporation Energia, Korolev, Russia
RESEARCH OBJECTIVES
The Telemetry Data-Based Determination of the Dynamic ISS Characteristics (Tenzor)
investigation was carried out in order to test the methods for determining and updating the ISS
dynamic characteristics based on the telemetry data reflecting the motion control system
operation. The rationale for initiating Tenzor was the proposed changes in the ISS dynamic
characteristics required because of the ISS reconfigurations for Progress or Soyuz vehicle
docking/undocking operations, cargo transfer, operating fluids consumption, installation
activities aboard the station, etc, which have an indirect impact on the interrelation of the ISS
moments of inertia, aerodynamic characteristics, and center of mass position.
SPACE BENEFITS
The method for updating the dynamic spacecraft
characteristics developed during Tenzor
performance and results review is applicable not
only to the ISS, but also for controlling other
spacecraft.RESULTS
The data obtained by Tenzor are used to increase
the effectiveness of ISS flight control, since more
accurate dynamic parameters entered into the
mathematical simulations at the ground complex
and into the station computer system increase the
reliability and predictability of station behavior when
maintaining a specified angular position or changing the ISS attitude.
Based on the data obtained by Tenzor a feasibility study was carried out on controlling the
Yamal-200 spacecraft attitude based on the mathematical simulation of its motion. To increase
the accuracy of this simulation and of the motion control system operation, the dynamic
characteristics of the spacecraft were refined. The study results demonstrated the feasibility of
controlling the Yamal-200 spacecraft using the mathematical simulation of angular motion.
Therefore, the results obtained for the ISS (method for updating the mass value based on the
mass of the launched satellite) provide additional capabilities to perform flight control tasks,
plan experiments, and analyze experiment results obtained.
Yamal-200 spacecraft. Roscosmos image.