Individual Robot Analysis
Turnin Logistics
 Include your name, team number, and section number on the cover of report
 Attach your original project proposal (with TA comments) to the back of the final robot report
 Turn in stapled hardcopy as descried below for detail grading.
 Turn in electronic copy for proofofsubmission as described below.
Due Date
Due Date For Tu & Wed Sections:
 Friday last day of classes at 8:00pm
 Turn hardcopy into bins in Design Studio by the sink
 Submit electronic copy also by 8pm
 TED.ucsd.edu ( log in with your student credentials)
 MAE 3  Delson (select MAE3 from your list of classes)
 Assignments ( this is located on the left hand side menu)
 View/Complete ( Click the link for the assignment and upload your report)
Due Date For Th & Fr Sections:
 Saturday, one day after last day of classes at 8pm
 Turn hardcopy into large plastic bin in EBU2239
 Submit electronic copy also by 8:00pm
 TritonEd.ucsd.edu ( log in with your student credentials)
 MAE 3 (select MAE3 from your list of classes)
 Assignments ( this is located on the left hand side menu)
 View/Complete ( Click the link for the assignment and upload your report)
Assignment
Each individual team member should analyze a key component of the machine that they built. The component being analyzed should:
 Be a moving part
 Have an impact on overall machine performance
 Have a performance characteristic that can be measured such as speed, force, or torque.
 Each team member should analyze a different aspect of machine performance. If necessary two members can analyze the same component but different aspects of that component, such as force generated vs. speed of operation.
A team member CAN analyze a piece of hardware that was built but was not incorporated in the final robot design; as long as the component functions to the point where one can compare theoretical predictions and part performance (or failure to perform). If you spent a lot of time working on part of the machine that did not pan out, still consider using it for your analysis.
Grading Guidelines
The individual analysis will be graded on clarity of text and graphical content as well as correctness of analysis. It is recommended that reports be printed in color and presented professionally. The analysis section will consider the complexity of the analysis. If a relatively simple part of a machine is being analyzed, then a high grade will require more indepth analysis, such as: consideration of friction and the motor torquespeed curve. I will be looking for a critical assessment of machine performance and a meaningful explanation of experimental results and how they may vary from theoretical expectation.
Part I: Description of Component (2 page max) (25%)
In this section you should introduce your entire robot's design, what it does, and introduce the component you intend to analyze. It should be be clear to a naive reader how your robot works. This section should include:
 3D CAD of complete machine with annotations. It should be clear how overall machine works.
 3D CAD of component with annotations. You should show how details of component work. Include multiple views if it helps
 Photo of your robot
 Minimum Set of Functional Requirements of your component
 What the component needs to accomplish (not how it was accomplished)
 List each FR as a one sentence bullet. Indicate quantitative values where appropriate
 Example: "Robot must reach middle of table in 10 seconds."
 Overview of how well component functioned. Give numerical values (e.g. speed, points, maximum mass lifted, etc...)
Part II: Project Management Essay (1 page MAX) (15%)
Select ONLY ONE area of project management listed below, and explain how this approach was used by you in the design process. This essay is not related to your analysis. Describe what aspects of this design process worked well or didn't work well, and what would you change in future design projects.
 Concept generation and creativity methods. Give an example where you had a conceptual block, conceptual breakthrough, or where you used a solution neutral environment. See lecture on Creativity.
 Risk reduction tests. Describe a case where you built a simple proofofconcept mechanism in order to decide whether to proceed with that approach. The results of the test could have led you to pursue or abandon your approach.
 Prioritization and scheduling. Explain why you prioritized certain tasks and how this impacted your overall design process. For example, did you follow your Gantt chart, and did the chart help the design process?
Part III: Analysis of Component (60%)
Objective of Analysis: What aspect of machine performance are you trying to calculate?
Free Body Diagram (FBD):
 The FBD must be digitally generated.
 Recommended approach:
 Create an Inventor drawing of your component with the proper view for the FBD
 Save the drawing as a image file
 Crop and add the force vectors and lengths in Powerpoint
 Create a table or list which shows all the physical parameters (actual numbers) used in the FBD and analysis
 Reminder: only external forces acting ON your component should appear in the FBD!
Force/Torque Analysis: Using the free body diagrams, force, and torque analysis, calculate the maximum performance of your component. Example: maximum lifting force Assumptions: List the assumptions of force torque analysis
 You should describe your assumptions in less than one sentence
 Indicate if the assumptions is conservative or optimistic
 Example: Pointmass Assumption: masses are concentrated at points as shown in the FBD above (optimistic).
Calculate the maximum force or torque: Describe step by step how you calculate the maximum force or torque generated by your component
 Use an equation editor:
 Microsoft word equation editor recommended
 variables should be kept until the final equation
 do not show trivial algebraic steps.
 give numerical results at the very end
 In addition to the maximum force, calculate the force required
Measure the maximum performance of the robot:
 Describe the experiment you conducted to measure the performance
 use spring scales, masses, etc..
 Give the numerical result
Force/Torque Conclusions:
 Calculate Factor of Safety (F.S.) in Force or Torque
 F.S._{ Force} = Force available / Force required
 Calculate the percentage error between the measured and theoretical maximum performance
Speed Analysis Using Power:Using power analysis, calculate the maximum theoretical speed of your component. Example: the fastest possible time your robotic claw can close. Assumptions: list the assumptions of your speed analysis
 You should describe your assumptions in less than one sentence
 Indicate if the assumptions is conservative or optimistic
 Example: No energy losses due to friction (optimistic).
Calculate the maximum speed of your robot: Describe stepbystep how to calculate the maximum speed of the robot by using energy and power. Use the maximum power output of your component to calculate the fastest theoretical time your component could complete it's task.
 Use an equation editor:
 Microsoft word equation editor recommended
 variables should be kept until the final equation
 give numerical results at the very end
 Motion analysis of video can use Motion Analysis Software: http://physlets.org/tracker/ that is installed in the computer labs.
Compare the theoretical fastest time to the measured time of your component. Discuss why there is a discrepancy. (hint: the theoretical fastest time will be much faster than your measured time).
Overall Conclusions: In this section, you will make general conclusions about your component, as well as the robot project as a whole
 briefly summarize the results of your analysis
 What did you learn from the analysis?
 Explain what you would do next time if you were to repeat the competition
 Conclude general and thoughts ideas for the robot.
Specific Guidelines and FAQ
 For MAE3 analysis, dynamics can often be neglected and quasistatic analysis performed.
 However, topics covered in lecture (e.g. friction and jamming in linear bearings) should not be neglected.
 Do not write out more significant digits than one has reasonable accuracy for.
 When describing assumptions, indicate if the assumptions is conservative or optimistic. With a conservative assumption, actual machine performance will be higher than predicted (the other way around for optimistic assumptions).
 There will always be differences between predicted performance and measured performance. The key is to get as close as possible with the analytical and measurement tools we have, and then make hypotheses to help explain actual machine performance.
 In MAE3 it can happen that one builds the machine without extensive use of analysis; instead relying on trialanderror. In such cases the analysis is performed afterwards for the report. However, with realworld projects, typically trailanderror is very expensive, so the analysis must be done before one builds. For the MAE3 analysis report, assume that you are doing the analysis before the device is built, and your objective is to determine if indeed the device will perform as required, and to predict performance speed and or force/torque.
 Some experimental measurements can be done to support the analysis, such as of friction in the system.
 What assumptions should I make?
 The analysis should only be as complex as it needs to be to generate useful predictions. All assumptions should be justified. The impact of these assumptions should be addressed in the discussion.
 Friction should not be neglected in linear sliders, since this was covered extensively in class.
Example Analyses

Updating...
Ċ Michael Tolley, Sep 21, 2015, 6:06 AM
ĉ Daniel Yang, Nov 28, 2017, 7:14 PM
Nate Delson, May 24, 2016, 11:09 AM
