IREC 2023 - Payload Requirements

Purpose

The purpose of the payload is to test a novel airbrake system in near flight-like conditions, without risking the flight of the rocket itself.

Mission Requirements

Driven by interfacing with the rocket and ESRA rules and regulations. Required for a safe and legal flight.

No.RequirementReference / Reason
1The payload must conform to the volume and shape of the 3U cubesat standard.

TODO (DTEG reference)

Points

2The payload must have a mass of at least 4kg (8.8lb)TODO (DTEG reference)
3A maximum of 20% of the payload mass can be non-functional.TODO (DTEG reference)
4The payload must not influence the flight of the rocket in any way. (It should be "replaceable with ballast mass").TODO (DTEG / HeroX reference)
5The payload must be able to launch in a window of X hours maximum.Can't reduce pad time requirements of rocket.
6TODO all the deployable rulesStem from Derived Requirements no. 7

Objective Requirements

Driven by the primary mission of the payload. Not necessary for a safe/legal flight, but necessary for a nominal experiment.

No.RequirementReference / Reason
1The payload must have an airbrake.
2The effectiveness of the airbrake must be evaluated and verified.

Derived Requirements

Derived from high-level mission and objective requirements.

No.RequirementReference / Reason
1The airbrake should integrate easily into a rocket.Purpose of experiment is to use for a future flight on a rocket.
2The airbrake resistance must be actively controlled.Need active control for use as a control system on a rocket.
3The airbrake must be electronically controlled.Future rocket will be using electronic control.
4The position of the airbrake must be measured.
5The impact of the airbrake on the payload body acceleration must be measured.
6

Flight conditions must be measured, including:

  • Angular velocity (3 orthogonal axes)
  • Angular position (3 orthogonal axes)
  • Linear Acceleration (3 orthogonal axes)
  • Pressure
  • Temperature
  • Humidity

7The payload must be deployable.Need to measure effectiveness of break, but cannot effect flight of rocket (including descent).
8The payload should maximize descent velocity.Higher velocity is a closer simulation of flight on a real rocket.
9The payload should remain in a consistent orientation during descent, e.g. no "tumbling".