ENAE 483/ENAE 788D
Principles of Space Systems Design
Fall, 2002

Updates

021215 - Solutions 3, 10, and 11 are posted, more as fast as I can crank them out - keep checking back as the day goes on.

021213 - After thinking about it further, I'm relaxing the ground rules for the final exam on Monday. The exam will now be OPEN NOTES.

As a friendly suggestion, I would advise you to still prepare a synopsis of the most important material, to avoid wasting a lot of time flipping through pages and pages of notes. But at least, you won't have to worry about forgetting to put something critical on your "cheat sheet"...

021210 - Solutions to the midterm exam are now posted (pdf file). It includes the statistics on class grades for both ENAE483 and 788D.

021203 - I understand that there has been some confusion about my expectations for the oral presentations in upcoming classes, with a number of people thinking this should be a "light and fluffy sales-type" presentation. WRONG!!! Let me remind you of the quote in the original specification for this assignment:

The presentations should be logical, well-thought-out technical reviews [italics added] of the system you designed, and should adhere to the guidelines presented in the "Engineering Graphics" class.

Also, I'll refer you to the specific issues identified as evaluation criteria, many of which specifically address technical expectations. While you clearly don't have enough time in 15 minutes to fully detail everything you've done on this project over the course of the term, you should be able to communicate not just the final design, but indicate to the audience (me) the depth of the technical work you've accomplished. This might mean sketches, diagrams, graphs, formulae, whatever, but the idea of "high information density" is that there is a lot more material in the presentation than you formally present, and that material makes it clear that numbers you present weren't pulled out of mid-air.

I'm hopeful that this isn't a major change to the presentation files for too many of the groups. I'm willing (since this might involve last-minute work, although it isn't a change in the original specifications) to give an extension for the submission of the presentation files to midnight Wednesday night. That will give me enough time to download the files from AJCOnline and verify that they run on my machine for projection.

021120 - Yesterday's lecture (#22) uploaded. Also, keeping in mind the short time left in the term, and the demands of the upcoming TP2 submissions, I've decided to cancel any further homework problems. It's not that I don't think the material is important - in fact, I do expect to see applications of the material, such as life support, habitability, structural analysis, and avionics in your TP2 presentations - but I'd rather you spend the time improving TP2 than dilute your efforts with more homework at this point. By the way, on Tuesday the 26th I'm going to take volunteers for groups to do their TP2 presentation on Thursday 12/5. If I don't have enough volunteers, I'll pick them at random. To keep things fair, everyone has to turn in their presentation slides at the same time. By request, though, I'm splitting the due dates for the presentation slides and the comprehensive package, to allow you more time to finish up the comprehensive package after the due date for the presentation slides.

021115 - Lecture #21 uploaded. You can also download the guided tour of ISS I showed at the end of class; it's a 19.9 Mb Quicktime movie.

021113 - Lots of uploads:

021109 - A revised version of the midterm exam has been uploaded, with more information you will need for questions 3, 5, and 7. (Sorry - this is the last time I try to write an exam on a crowded plane...) All other midterm links have also been revised to point to the new exam version. The new information is in red text.

021108 - Midterm exam posted (.pdf format), and due in class on Tuesday 021112. Please read the note on the top of the test about procedures for this takehome.

021030 - I'm working through the formal solution sets, and the solutions to Problem 8 have been posted. This is going to take longer than I thought/hoped! Lecture tomorrow will be the old-fashioned kind, so don't expect notes here prior to class. Oh, yeah, Problem 14 is posted, too.

021030 - Lecture notes for #13 and #15 have been updated. There were two mistakes on page 15 of #13, which is the example of pressure-fed propulsion analysis. All three of the volumes in the equation should have exponents of gamma, which is 1.67 in all cases (since all of the tanks contain helium at the end conditions.) Also, the number I originally listed for mass was actually density, so the mass equation has been added. (If you didn't get my numbers on this, don't forget that the ideal gas equation has to have pressure in Pascals [N/m2] if the units are to be consistent.) The changes are in red on the color pages. There weren't any errors corrected in #15, but I did originally omit the value for the Stefan-Boltzmann constant, and I forgot to explain what "epsilon" is - both of those have likewise been fixed. The original draft of #15 was missing some components of the equations due to the vagarities of Microsoft. That was fixed in the "as-presented" version I posted after that class, and I've double-checked that it's still fixed. Get the updated versions if you haven't already!

021028 - Draft of Lecture #17 added

021025 - (Okay, I should learn to proof-read...) There were two problems (b) on Homework #10, one of which was left over from last year. That problem has been deleted. Also, you need a temperature on 10(c), which is now there. Sorry...

021024 - The thermal systems notes (Lecture #15) are now in the as-presented state. My best estimation is that the folks at Microsoft who wrote Equation Editor hate thermodynamics...

021024 - Problem #12 has been added

021023 - Lecture #16 notes and Problems 10 & 11 added. Problem 12 still needs work; it'll be up shortly.

021022 - First cut at Lecture #15 notes added

021021 - Added Lecture #14 (Power Systems) as presented in class last Thursday

021015 (very early morning) - Added Lecture #13 notes

021014 - It was just pointed out to me that I never defined chi ("fancy X", as they referred to it) in the notes on parallel staging. Chi is the fraction of propellant remaining in the vehicle core stage when the boosters burn out. You can easily calculate it based on the assumption that the thrusts (and therefore the propellant mass flow rates) remain constant. The notes on the web site have been updated to include this useful factoid. (Sorry about that...)

021013 - Added Problems 7, 8, and 9

021011 - Revised Lecture #12 notes to version presented in class

021009 - Added Lecture #12 notes

021008 - Since it appears a lot of people are having problems with the second problem set, I'm going to slide the due dates for both 4-6 and 7-9 back by one class session - which will give you an extra weekend to work on each of them. Don't let it slide! Get enough stuff done on 4-6 now so that you can ask questions as needed before the weekend!

021007 - A quick rearrangement of lectures this week, and the new Lecture #11 notes were added

021003 - Description of Team Project 2 added, as well as links to the Delta IV [PDF; 9.4 MB] and Atlas V [PDF; 1.3 MB] payload guides. (Also added Dec. 3 class, which seems to have been absent from the syllabus up until now...)

021002 part 2 - Problem 5, Lecture #10 added

021002 - Lectures #7 & #8 notes revised to version presented in class; example for trade-off ratio analysis added to #7; Problems 4 and 6 added (5 to come later today)

020930 - Lecture #9 notes added

020925 - Lecture #8 notes added

020923 - Lecture #7 notes linked - be warned that these will be updated shortly

020913 - Revised (as-presented) notes for lectures 3 and 4 are posted, along with Problem 3

020909 - Lecture notes for lectures 3 and 4 added

020906 - Revised course notes and homework for lecture 2 are posted, along with details for Team Project 1

020904 - The web site is up, with notes for the first two lectures. The rosters for Team Projects 1 and 2 are here.

Syllabus

Links to download PDF lecture notes in full color
Links to download PDF lecture notes in black & white

 Date

 Subject

 Deadlines

 Problems
 The Fundamentals of Space Systems Engineering
 Sept. 3 (#01)     Course Overview; Systems Engineering  

Problem 1
Solution
 Sept. 5 (#02)     The Space Environment  

 Problem 2
Solution
 Sept. 10 (#03)     Orbital Mechanics  

 Problem 3
Solution
 Sept. 12 (#04)     Engineering Graphics  

 Team Project 1
 Sept. 17 (#05)   Engineering Ethics  
 Sept. 19 (#06)   Engineering in Teams  Problems 1-3 due
 Design Level 1:
Vehicle-Level Parametric Design
 Sept. 24 (#07)     Rocket Performance/Multistaging  

 Problem 4
Solution
 Sept. 26 (#08)     Parametric Analysis  Team Project 1 due

 Problem 5
Solution
 Oct. 1 (#09)    Principles of Cost Analysis  

 Problem 6
Solution
 Design Level 2:
System-Level Parametric Design
 Oct. 3 (#10)    Mass Estimating Relations and Budgeting  

 Problem 7
Solution
 Oct. 8 (#11)    Reliability, Redundancy, and Resiliency  

 Problem 8
Solution
 Oct. 10 (#12)    Advanced Cost Estimation and Analysis  

 Problem 9
Solution
 Design Level 3:
System-Level Detailed Design  
 Oct. 15 (#13)    Propulsion System Design  Problems 4-6 due

 Problem 10
Solution
 Oct. 17 (#14)    Power Systems Design  

Problem 11
Solution 
 Oct. 22 (#15)    Thermal Systems Design  Problems 7-9 due

 Problem 12
Solution
 Oct. 24 (#16)    Structural Design and Analysis    
 Oct. 29 (#17)    Structural Practices  

 Problem 14
Solution
 Oct. 31 (#18)    Life Support Systems  Problems 10-12 due  
 Nov. 5 (#19)    Entry Vehicles    
 Nov. 7   Midterm Examination (.pdf) - Takehome; no class    
 Nov. 12 (#20)    Space Physiology  Midterm takehome due  
 Nov. 14 (#21)    Human Factors and Habitability    
 Nov. 19 (#22)    Orbital Maneuvering  Problem 14 (TP2 progress report) due  
 Nov. 21 (#23)  A Preview of Coming Attractions    
 Nov. 26 (#24)  Avionics    
 Nov. 28  Thanksgiving Break    
 Dec. 3 (#25)  Schedule Margin - to be announced  Team Project 2 PowerPoint slides for oral presentations due on AJCOnline  
 Dec. 5  Team Project 2 oral presentations    
 Dec. 10  Team Project 2 oral presentations  Team Project 2 PowerPoint slides for comprehensive final reports due on AJCOnline
 Solutions 1-12 out		  
 TBD  Final Examination