Spacecraft System Design PDF

STEP OUTPUTS COMMENTS 1) Define mission Mission objectives statement. Mission objectives include requirements List of mission requirements & characteristics of the orbit,...

STEP OUTPUTS COMMENTS 1) Define mission Mission objectives statement. Mission objectives include requirements List of mission requirements & characteristics of the orbit, constraints. payload, and vehicle. Consideration of political, Technical risk level & economic, and institutional schedule determine level of environment. technical aggressiveness. 2) Develop criteria for Feasibility / acceptability criteria Predetermine the criteria evaluating and selecting Quantitative figures of merit by which the spacecraft systems Qualitative figures of merit systems assessments are to be done. 3) Develop alternative Assessment of past solutions. Include several concepts mission concepts Launch site selections. that scope out of the Orbits / mission profiles. possibilities. Low-thrust or high-thrust Avoid vehicle design at this maneuvers and where they are point. required. Δv or impulse budget. 4) Define the vehicle Parameters of vehicle Vehicle configuration system & select potential performance. includes the number of technologies Configuration of vehicle. engines, engine thrust Assessment of past solutions. levels, size, and mass, as Systems requirements. well as top-level ideas for List of potential technologies. the different subsystems. 5) Develop preliminary Assessment of “off the shelf” designs for the different hardware applicability. systems Systems mass estimate. Systems configuration. Systems performance prediction. 6) Assess designs and Feasibility assessments. Assess the options to configurations Ranking of feasible options. determine which one best meets mission objectives. Use ranking criteria already defined in step 2. 7) Compare designs and Baseline the best system. We need to decide choose the best Document of reasons. whether we iterate or option(s) baseline a particular concept and set of options. 8) Iterate and document Documentation of baseline if no Iterations is required for all the reasons for choices iteration is required. designs. Documentation of reasons for The iterations can go back iteration. to any of the steps listed above, depending on the problem.