Space Mission Design Basics
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Questions and Answers

What are the two main aspects that technical risk level and schedule determine in the process of defining a mission?

Technical aggressiveness and level of technical detail

During the development of mission concepts, what are the key factors to consider when determining the type of thrust required?

The type of thrust required depends on the specific maneuvers needed for the mission. Low-thrust maneuvers are often used for longer duration missions, while high-thrust maneuvers are typically required for shorter duration missions.

What aspects of the vehicle system are included in the vehicle configuration?

The vehicle configuration encompasses the number of engines, their thrust levels, the size and mass of the vehicle, and conceptual ideas for the various subsystems.

How are feasible options ranked during the assessment of designs and configurations?

<p>Feasible options are ranked based on their ability to meet the mission objectives and using the criteria established in step 2.</p> Signup and view all the answers

What are the two essential steps in the comparison and selection of the best design option?

<p>The crucial steps are establishing a baseline for the best system and documenting the reasons behind this choice.</p> Signup and view all the answers

The step of iterating and documenting requires documentation only when no iterations are needed.

<p>False (B)</p> Signup and view all the answers

The iterations can only be done within the step they are related to, they cannot be backtracked.

<p>False (B)</p> Signup and view all the answers

Flashcards

Mission Objectives

The overall goal or purpose of a mission, outlining its intended outcomes and desired results.

Mission Requirements and Constraints

Specific requirements, limitations, and conditions that the mission must adhere to.

Spacecraft Systems Assessment

A systematic process to assess the viability of a proposed spacecraft system, taking into account technical, economic, political, and institutional factors.

Quantitative Figure of Merit

A quantitative measure of a system's performance, providing a numerical value to evaluate its effectiveness.

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Qualitative Figure of Merit

A subjective assessment of a system's performance based on qualitative factors, such as its reliability, safety, and ease of operation.

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Developing Alternative Mission Concepts

Exploring different approaches to achieving the mission objectives, involving the analysis of past solutions, launch sites, orbits, and potential vehicle configurations.

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Technical Aggressiveness

A key consideration in determining the technical complexity and feasibility of a mission, taking into account the level of risk involved.

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Vehicle System

The specific characteristics of the spacecraft that will carry out the mission, including its size, mass, propulsion system, and payload.

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Assessment of 'Off the Shelf' Hardware Applicability

A process to evaluate the suitability and availability of existing hardware components for the spacecraft system.

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Systems Mass Estimate

Estimating the overall mass of the spacecraft, including all its components and subsystems.

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Systems Configuration

The configuration of the different subsystems within the spacecraft, showing their arrangement and connections.

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Systems Performance Prediction

Predicting the performance of the different systems based on their design, capabilities, and limitations.

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Feasibility Assessments

Evaluating the selected spacecraft designs based on predefined feasibility criteria to identify the best options for the mission.

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Ranking of Feasible Options

A process of ranking feasible spacecraft options based on their performance, cost, and other factors.

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Baselining the Best System

A formal decision to select and finalize a particular spacecraft design as the baseline for the mission.

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Iterating Designs

A process of refining and improving the selected spacecraft design based on new information, testing, and analysis.

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Documentation of Reasons

Documenting the reasons for choosing a particular spacecraft design or for making modifications to the design.

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Study Notes

Mission Requirements and Constraints

  • Mission objectives are stated, including orbit, payload, and vehicle characteristics.
  • Mission requirements and constraints are listed.
  • Political, economic, and institutional factors are considered.

Evaluating and Selecting Systems

  • Criteria for evaluating systems are developed.
  • Quantitative and qualitative figures of merit are used to assess feasibility.

Developing Alternative Mission Concepts

  • Past mission solutions (launch sites, orbits, maneuvers) are assessed.
  • Low-thrust and high-thrust maneuvers are considered.
  • Budgetary constraints (impulse budget) are taken into account.

Defining Vehicle System Technologies

  • Vehicle performance parameters are defined.
  • Vehicle configuration aspects like engines, thrust levels, size, mass are considered.
  • Existing technologies (or "off-the-shelf" hardware) are reviewed.
  • Past solutions and systems requirements are assessed.

Preliminary Design

  • Preliminary designs for various systems are developed.
  • Hardware applicability is assessed.
  • System mass and configuration are estimated.
  • Performance prediction and feasibility assessments are made.

Assessing Designs and Configurations

  • Feasible options are ranked.
  • The best system is chosen as a baseline.

Comparing and Choosing the Best Options

  • Best system is selected.

Iterating and Documenting

  • Iterations, or revisions, might be needed.
  • Reasons for iterations are documented.

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Related Documents

Spacecraft System Design PDF

Description

Explore the essential components of designing a space mission, including mission requirements, evaluating systems, and defining vehicle technologies. This quiz will guide you through the considerations needed for developing alternative mission concepts and preliminary design stages.

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