23, July 2014

PROJECT TITLE: Dynamic Launching and Recovery Procedures from High Altitudes — DYLARPHA 

Coordinator: National Institute for Aerospatial Research and Development (INCAS) 

Partners: Research Centre for Aeronautics and Space – University POLITEHNICA-Bucharest, CCAS-UPB 

Period: 11 December 2012 – 11 September 2015

Project director: Sorin Stefan Radnef

Project team:


  • 2 senior researchers with experience in applied and scientific research 
  • 2 young researchers
  • 2 new graduate engineers


  • 3 senior researchers with academic background
  • 3 researchers with academic background

Description: Continue the works of a previous project regarding dynamic launching/ recovery

Launching procedure with a maneuver which realize a dynamical launch of the rocket, assuring dynamical conditions closely to those reached by a ground launched rocket having usual 3motor stages

New mechanical description of the entire flight procedure, focused to obtain an autonomous representation of the mechanical movement

Control laws generation for a flight mission with constraints using an approach based on analytical methods

Simulation computer code for the controlled flight evolution

Numerical and in flight tests (using adequate similarity criteria)

Project objectives:

  • the development of the data base from the previous project related to the dynamic launch/ recovery 
  • accurate definitions of the main conceptual problems and mechanical modeling  for the  evolution of a launching/ recovering technical system.
  • statement and development of a solving algorithm for the flight mechanical model not depending of a coordinate system 
  • simulations of controlled flight considering the main flight phases of dynamic launching and recovery
  • experiments in similar flight maneuvers


  • WP1 – Concepts and Basic Research
  • WP2 – Mechanical and mathematical model implementation for the controlled evolution of the launching-recovery system; simulations
  • WP3 – Analysis and numerical tests to determine optimal trajectories and control laws
  • WP4 – Functional model and validation tests
  • WP0 – Project Management

Contributions to the STAR programme objectives:

  • The method of dynamic launching/ recovery is a new concept with research potential
  • Estimated results, if validated by flight tests, may define a way to rise the flight security and cost efficiency and so to become an objective for space projects
  • The project objectives require sustained efforts and cooperation from researches and academics which are involved in activities to approach these objectives
  • New flight mechanics model and control method of flight mission with constraints are a solid base for foundamental scientific and applicative results
  • Young researchers and new graduates are involved in the project activities