Algorithmic optimization of the launch vehicle control at the trajectory active part during the first stage flight
Authors: Shakmaev I.V. I.V., Dolgolevets O.N., Polekhin A.A., Malatsion I.V.
Published in issue: #3(147)/2024
DOI: 10.18698/2308-6033-2024-3-2345
Category: Aviation and Rocket-Space Engineering | Chapter: Aircraft Dynamics, Ballistics, Motion Control
The paper considers a method in optimizing flight control of the launch vehicle first stage during the Earth’s atmosphere passage. It was assessed using computation of the current maximum velocity pressure and lateral loads based on the actual values of velocity, angles of attack and glide of the Soyuz-2.1 a, b, c and Angara-1.2 launch vehicles, as well as of the atmosphere parameters. The launch vehicle flight control law is simplified in the maximum velocity pressure section. As a result, based on the results of calculations, feasibility of earlier restoration of operation of the control system “full” control law was identified using computation results to compensate for errors in velocity and drifts of the center of mass stabilization loop. A method is proposed to optimize the first stage flight control by varying the exit time of the control system “overload loop restrictions” mode. A possibility in saving propellant components of the presented launch vehicles by optimizing the flight control was considered for the selected launches.
EDN ZBRQGS
References
[1] Sikharulidze Yu.G. Ballistika i navedenie letatelnykh apparatov [Aircraft ballistics and guidance]. Moscow, BINOM. Laboratoriya Znaniy Publ., 2013, 407 p.
[2] Arens V.D., Fedorov S.M., Khitrik M.S. Dinamika sistem upravleniya raket s bortovymi tsifrovymi vychislitelnymi mashinami [Dynamics of missile control systems with the on-board digital computers]. Moscow, Mashinostroenie Publ., 1976, 272 p.
[3] Kuzovkov N.T., Salychev O.S. Inertsialnaya navigatsiya i optimalnaya filtratsiya [Inertial navigation and optimal filtering]. Moscow, Mashinostroenie Publ., 1982, 216 p.
[4] Mashinostroenie. Entsiklopediya. V 40 t. T. IV-22. Kn. 1: Raketno-kosmicheskaya tekhnika [Mechanical Engineering. Encyclopedia. In 40 vols. Vol. IV-22. Book 1: Rocket and space technology]. Moscow, Mashinostroenie Publ., 2012, 925 p.
[5] Aizenberg Ya.E., Sukhorebry V.G. Proektirovanie sistem stabilizatsii nositeley kosmicheskikh apparatov [Design of the spacecraft launch vehicle stabilization systems]. Moscow, Mashinostroenie Publ., 1985, 223 p.
[6] Suhanov A.V., Duga V.V., Krotova L.V. Vliyanie vozmushchayushchikh faktorov, deystvuyushchikh pri otdelenii bokovykh blokov RN “Soyuz-2”, na operativnost poiska otdelyayushchikhsya chastey v rayone padeniya [Influence of disturbing factors acting during Soyuz-2 lateral units separation on search rapidness of separating parts in impact areas]. Journal “Vestnik “NPO imeni S.A. Lavochkina”, 2023, no. 1, pp. 53–60.
[7] Lysenko L.N., Betanov V.V., Zvyagin F.V. Teoreticheskie osnovy ballistiko-navigatsionnogo obespecheniya kosmicheskikh poletov [Theoretical foundations of ballistic and navigation support for the space flights]. Moscow, BMSTU Publ., 2014, 518 p.
[8] Lebedev A.A., Gerasyuta N.F. Ballistika raket [Missile ballistics]. Moscow, Mashinostroenie Publ., 1970, 243 p.
[9] Appazov R.F., Sytin O.G. Metody proektirovaniya traektoriy nositeley i sputnikov Zemli [Methods for designing trajectories of carriers and Earth satellites]. Moscow, Nauka Publ., 1987, 440 p.
[10] Abramov O.V., Bernatsky F.I., Zdor V.V. Parametricheskaya korrektsiya sistem upravleniya [Parametric correction of the control systems]. Moscow, Energoizdat Publ., 1982, 175 p.
[11] Pustylnik E.I. Statisticheskie metody analiza i obrabotki nablyudeniy [Statistical methods for analyzing and processing observations]. Moscow, Nauka Publ., 1968, 288 p.
[12] Ventzel E.S. Teoriya veroyatnostey [Probabilities theory]. Moscow, Akademiya Publ., 2003, 576 p.