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Requirements Generation

Following the system engineering design, the first step to start with the preliminary design of the rocket was understanding the requirements that the mission involved.
Generating a requirement list was essential in order to give a more accurate shape to the product we had to obtain. An analysis of the subsystems of the rocket was also made and requirement concerning different subsystems were generated.

 Requirements List:

  1. The maximum flight-time has to be 90 s. This is established by NAVRO which is the association in the Netherlands for amatory rockets. In fact the rocket had to land inside the military area at 't Hard; considering the worse case scenario in terms of wind speed and direction, a maximum time flight was determined considering that the rocket could not go out of the military area in it surely didn't have to fly towards the observatory area.
  2. The air space was closed over the military area for the period of duration of the launches. However the maximum height the rocket could achieve was around 1000 meters; this limit was set not to risk to interfere with the military space area. In fact, above an altitude of about 2000 meters the military space is violated.
  3. The speed of the rocket when leaving the launch tower should be of at least 20 m/s to make sure that no gust would dangerously change the trajectory of the rocket and to make sure that the rocket would ascend having enough momentum to follow the trajectory given by the inclination of the launch tower.
  4. The rocket should have a static margin between 1.3 and 2.5. The static margin is dependent on the distance between the center of pressure and the center of gravity. This distance changes during flight since the mass of the rocket changes.
  5. The egg must be in the rocket and it must be raw. 
This requirement list pushed the team to generate subsequent non-functional requirement regarding the subsystems of the rocket. These ones were generated during the conceptual design.

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