P18081: Mechanical Bioreactor
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Subsystem Build & Test

Table of Contents

Team Vision for Subsystem Level Build & Test Phase

The team's goal for this phase was to build a moving prototype of the device. The team did not assemble all parts of the device as machining of some parts still needed to be completed. The vacuum oven for curing PDMS was operated for the first time during this phase.

Risk and Problem Tracking

The problem tracking overview below outlines problems experienced in Phase II. No updates to the Risk Assessment were made during this phase.
Figure 1: MSD II Phase II Problem Tracking

Figure 1: MSD II Phase II Problem Tracking

Actuator Update Materials

This phase was heavily focused on actuation system development. The links below show the linear actuator performing at various speeds and displacements. Speed numbering is specific to the Arduino program, these numbers will later be quantified.

Speed 140, Full Stroke

Speed 140, Short Stroke

Speed 120, Full Stroke

Speed 120, Partial Stroke

Speed 80, Full Stroke


The graphs below were developed to quantify actuator displacement with program readout and iterations.

Figure 2: This is a graph of the Arduino program readout vs. distance actuator traveled. This information will help quantify readout parameters.

Figure 2: This is a graph of the Arduino program readout vs. distance actuator traveled. This information will help quantify readout parameters.

Figure 3: This is a graph of the Arduino program iterations vs. distance actuator traveled. This information will help the team determine how many times the program should run to obtain desired displacement.

Figure 3: This is a graph of the Arduino program iterations vs. distance actuator traveled. This information will help the team determine how many times the program should run to obtain desired displacement.


The figure below illustrates the wiring schematic utilized to obtain the actuator movement in the above videos and graphs.
Figure 4: Adafruit motor shield wiring schematic

Figure 4: Adafruit motor shield wiring schematic

Bill of Materials

Aluminum and screws for machining and assembling the device mount were added to the bill of materials.
Figure 5: MSD II Phase II Bill of Materials

Figure 5: MSD II Phase II Bill of Materials

Design Review Materials

TEAM MYSCLE'S Subsystem Build & Test Review Presentation can be found here.

Plans for next phase

During the next phase, the team will build a device model with specific inputs to get desired outputs. By the end of the next phase, most of the final documentation should be drafted.
Figure 6: MSD II Project Plan

Figure 6: MSD II Project Plan


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