P16551: Observer Calibrator
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Systems Design

Table of Contents

Team Vision for System-Level Design Phase

During this phase of design, the team analyzed possible solutions to our project, and determined the best selection of concepts from a high-level point of design. Here you can view the high-level functional analysis of the Observer Calibrator and our decisions that lead to a rough project concept.

Functional Decomposition

Below is our analysis of the functional blocks of the Observer Calibrator. These are the functions and subfunctions that we will deliver in the Observer Calibrator. How well our design performs these functions will be judged by our Engineering Requirements. These requirements are found on the Problem Definition page.

Functional Decomposition

Functional Decomposition

Benchmarking

For the entire design, an existing comparison already exists: the prototype designed by Technicolor. However, we do not have physical access to the prototype, and quantitative results for the research done with this prototype have not been published.

Benchmarking for this project will be done from the Engineering Requirements laid out on the Problem Definition page.

Selection of the appropriate systems to meet the Engineering Requirements is given in the below sections.

Concept Development

The morphological chart below shows some of the different ways to accomplish the system functions identified above.

Morphological Chart of Functions

Morphological Chart of Functions

Concept Selection

Three sets of alternatives were chosen and analyzed for their effectiveness in this project: Light Sources, USB Controllers, and Light Mixing Strategies.

Light Source Alternatives Considered

Light Source Alternatives Considered

Preliminary Pugh Chart of Light Sources

Preliminary Pugh Chart of Light Sources

Weighted Analysis of Light Sources

Weighted Analysis of Light Sources

Preliminary Pugh Chart of Microcontrollers

Preliminary Pugh Chart of Microcontrollers

Weighted Analysis of Microcontrollers

Weighted Analysis of Microcontrollers

Alternative Design of Viewing Module and Color Mixing

Alternative Design of Viewing Module and Color Mixing

Alternative Design of Viewing Module and Color Mixing

Alternative Design of Viewing Module and Color Mixing

Example of an Integrating Sphere

Example of an Integrating Sphere

Preliminary Pugh Chart of Color Mixing Strategies

Preliminary Pugh Chart of Color Mixing Strategies

Weighted Analysis of Color Mixing Strategies

Weighted Analysis of Color Mixing Strategies

Systems Architecture

A high-level view of the systems architecture for the Observer Calibrator is given below.

System Architecture for Observer Calibrator

System Architecture for Observer Calibrator

Feasibility: Prototyping, Analysis, Simulation

Two phase-appropriate feasibility analyses were done to ensure the Observer Calibrator can be designed as intended. First, analysis was done to ensure the Observer Calibrator meets the target luminance of 15 candela per meter squared, as per the Project Readiness Package. Second, analysis was done to ensure the Observer Calibrator can remain under budget. These analyses are shown below.

Notably, as the Mechanical Engineer for the team, Ben may be able to create the required housing and mixing chambers, reducing cost if needed. The analyses use the concepts selected above to further determine their feasibility.

Feasibility Analysis of Luminance

Feasibility Analysis of Luminance

Feasibility Analysis of Cost

Feasibility Analysis of Cost

Designs and Flowcharts

A high-level view of the Observer Calibrator functions is given in the Systems Architecture section above. This will be used to refine the flow of the Observer Calibrator, and more detailed flowcharts will be implemented below. This process will be continued in the Subsystems Design phase following the Systems Design Review.

Risk Assessment

Since starting our systems design, we have updated our risk assessment of this project. The Planning & Execution Page gives an updated risk assessment.

Design Review Materials

Our Systems Design review takes place on Tuesday, March 1. A link to the review slides can be found here.

Plans for next phase

In the Subsystems Design Phase, we will further narrow the design following the Systems Design Review. Notably, the individual subsystems of the power supply and microcontroller functions have not yet been selected; pending choices on the higher level systems.


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