The spacecraft angular velocity estimation in the orbital stabilization mode by the results of the local vertical sensor measurements

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CONTROL SYSTEMS
THE SPACECRAFT ANGULAR VELOCITY ESTIMATION
IN THE ORBITAL STABILIZATION MODE BY THE RESULTS
OF THE LOCAL VERTICAL SENSOR MEASUREMENTS∗
N.E. Zubov1, 2, E.A. Mikrin1 ,2 , A.S. Oleynik1 ,3 ,
V.N. Ryabchenko1,2, D.E. Efanov1
1OAO Korolev Rocket and Space Corporation Energiya,
Korolev, Moscow region, Russian Federation
e-mail:
2Bauman Moscow State Technical University, Moscow, Russian Federation
e-mail:
3Moscow Institute of Physics and Technology (State University),
Dolgoprudnyy, Moscovskaya oblast, Russian Federation
Implementation of the orbital orientation mode is based on the use of sensor
equipment, measuring the spacecraft position angles relative to the coordinates
system and the angular velocity of spacecraft rotation relative to inertial space.
In case the latter fails the orbital stabilization implementation is impossible.
Consequently, it is required to make on-board estimation algorithms for a angular
velocity vector in real-time by the results of measurements using an angular position
sensor. The exact pole placement method was used to obtain the analytic solution of
the estimation algorithm synthesis for angular velocity of the spacecraft rotation in
the orbital stabilization mode by the results of local vertical sensor measuring. The
mathematical simulation results are presented and the possibility of the developed
algorithm implementation is assessed in real-time. The simulation results confirm
high efficiency of the algorithm operation.
Keywords: spacecraft, exact pole placement method, local vertical sensor, angular
velocity, estimation algorithm.
Introduction.The problem of building up and stabilizing orbital
navigation mode [1–3] is one of the most common in spacecraft (SC)
flights practice regardless of their target mission. As a rule, implementation
of the above mentioned mode is based on the use of sensor equipment
measuring SC position angles relative to the reference coordinate system
and SC angular rotation velocity with respect to inertial space. In case the
latter fails the implementation of orbital stabilization is impossible, thus,
it is essential to build on-board estimation algorithms for angular velocity
vector by the results of angular position sensor measurements in real time.
The characteristic feature of many SC is the usage of a local vertical
builder (IKV) [4] as a measurement device of angular roll position, which
measures only two angles (angles of roll and pitch). The present article
is devoted to the analytical synthesis of SC angular velocity estimation
algorithm in the orbital stabilization mode by the results of local vertical
∗The research was funded by Russian National Fund grant (project N 14-11-000460).
ISSN 0236-3933. HERALD of the BMSTU. Series “Instrument Engineering”. 2014. No. 5 3