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2.086  Numerical Computation

Fall 2017

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This is a mechanism with negative stiffness which students analyzed on the final exam. Adapted from “Negative Stiffness Building Blocks for Statically Balanced Compliant Mechanisms: Design and Testing” Karin Hoetmer, Geoffrey Woo, Charles Kim and Just Herder, J. Mechanisms Robotics 2(4), (Sep 30, 2010).

Instructors: Daniel Frey, Alexie M. Kolpak, Jeffrey L Moran, Giuseppe Romano, Ali Talebinejad, Sara M Wilson

TAs: Amit Arun Gandhi, Sohae Kim, Hao Li, Sally A Miller, Sydney Glass Sroka

Lecture:  M1  (26-100)
Lab:  T 2-5, R 9-12  (5-233)
Lab:  Weds 2-5  (1-150)
Lab:  R 2-5, F 9-12   (W31-301)
Lab:  F 2-5  (1-115)

Information: 

OCW archive available

Announcements

Final Exam Grades and Final Solutions, Drone Raffle Result, …

Dear 2.086 Students;

The Final exam Grades and the Final Exam Solutions are now posted on Stellar. The course grades will be posted on Stellar before the end of this week.

We also ended up entering the name of ALL of the current 2.086 students into the raffle for the Drone. Using this “uniformly distributed probability” procedure,  Prof. Frey at the presence of all the Final proctors, pulled a single name out of the tin can (a fair draw) which resulted in the RC Quadcopter  going to Allison Lenhart.

It has been our pleasure to serve you in this course.

Thanks a lot for staying with us to the end.

Wishing you the best of luck in your other endeavors inside and outside MIT.

Happy Holidays to you all.

The 2.086 Teaching Team

Announced on 19 December 2017  10:35  p.m. by Ali Talebinejad

A set of NEW Livescripts and Assignment Solutions are posted on Stellar!

Dear 2.086 Students;

Don’t forget to fully charge your laptops on Sunday night!

During past few days, a set of New Livescripts on Stellar which cover various independent subjects and also the remaining Solutions to some of the previous assignments that you might find useful in your preparation for your final exam.

These comprehensive Solutions which are fully written as Livescripts are more than what you were expected to submit but you are encouraged to review them even if you have received full credits for those assignments already.  These livescripts contain useful instructional material on various subjects such as:

- solving nonlinear system of equations using Matlab fzero, fsolve, and fmincon functions,

- using unit vectors instead of angles for solving 3D problems,

- Monte Carlo and Matlab inpolygon function

- correlation coefficient,

- conditional probability,

- and much more …

Here is a list of links for directly accessing these NEW Livescripts:

Livescript on using fsolve to solve Nonlinear System of Equations
PreLab #10 solution: Problem No. 1 (Updated)
PreLab #10 solution: Problem No. 2

PreLab #9 solution

PreLab #8 solution

Wishing you the best of luck on your Final exam.

The 2.086 Teaching Team

Announced on 15 December 2017  11:15  p.m. by Ali Talebinejad

UPDATED: This Week Transitional Plans to the Final Exam: Lecture, Labs, Office Hours, .

(Please Notice: Per MIT rules, there will be NO Lab Hours on Thursday or Friday this week!)

Dear 2.086 Students:

Thanks for your efforts and enthusiasm to complete your assignments. This week you do not have any assignments and we will not cover new material. However, we have geared up and have appropriate plans in place to smoothly transition/prepare you for the final exam.

Review Lecture (Mon., Dec.11):

You are encouraged to attend this coming Monday Lecture because Prof. Frey will give a review session for the final exam.

Review Labs (Dec. 12-13):

There is no preLab but we WILL HOLD lab hours on Tuesday and Wednesday! We have prepared some useful practice problems which we will run through at the start of each lab and then we will be available to you for the remaining of  the lab hours.

NEW Office Hours (Dec. 11 to Dec. 17):

We will have NEW Offices Hours, literally every day this coming week, which you welcome to attend at your convenience if you have any questions. Here is our office hours schedule:

Mon. 5-7pm in 5-214, Giuseppe Romano, romanog@mit.edu

Tue.  10am-12 noon in 3-436, Sally Miller, millersa@mit.edu

Tue.  12-1pm in 3-436, Jeffrey Moran, j_moran@mit.edu

Tue.  5-7pm in 5-214, Giuseppe Romano, romanog@mit.edu

Wed. 5-6:30pm in 1-150, Sydney Sroka, ssroka@mit.edu

Thu. 12:30-2pm in 3-436, Jeffrey Moran, j_moran@mit.edu

Thu.  5-7pm in 3-137, Sohae Kim, s_kim@mit.edu

Fri.  8-9am in 5-321A, Dan Frey, danfrey@mit.edu

Fri.   10am-12 noon in 1-273, Jeffrey Moran, j_moran@mit.edu

Fri.  12:30-2pm in 3-237W, William Li, wl11@mit.edu

Fri. 5-7pm in 1-115, Amit Gandhi, amitg@mit.edu

Sat.  2-5pm in 5-314, Ali Talebinejad, taalebi@mit.edu

Sun. 6-9pm in 5-314, Dan Frey, danfrey@mit.edu

Sample Final Exam:

Sample final exams are already posted on Stellar under “Final Exam Materials”.

Final Exam:

The 2.086 Final Exam will happen on:

             Monday, December 18, 9:00am - 12:00noon at DuPont Gym

The Final exam will have the same format and rules as in Quiz1 and Quiz2.

Please make sure to fully charge your laptops because we might not have enough power access (outlets and/or extension cords) at DuPont.

Course Evaluation:

Please make sure to give us your feedback on this course BEFORE the Monday (Dec. 18) deadline. You can access the MIT Course Evaluation page by clicking on this link:

http://web.mit.edu/subjectevaluation/

Wishing you all the best of luck on your final exams.

The 2.086 Teaching Team

Announced on 10 December 2017  9:55  a.m. by Ali Talebinejad

Updated/NEW Office Hours for the Week of Dec. 4 to Dec. 10

Faculty

Prof. Dan Frey, danfrey@mit.edu , Fri. 8-9AM in 5-321A, Sun. 6-9PM in 5-314

Dr. Jeffrey Moran, j_moran@mit.edu , Thu. 2-4PM in 3-436, Fri. 10AM-12PM in 1-273

Dr. Giuseppe Romano, romanog@mit.edu , Wed. 5-7PM, Thu. 5-7PM in 5-214

Dr. Ali Talebinejad, taalebi@mit.edu , Sun. 6-9PM in 5-314

Graduate Teaching Assistants

William Li, wl11@mit.edu (w “el” “eleven”), Fri. 1-2PM in 3-237W

Sohae Kim, s_kim@mit.edu, Thu. 5-7PM in 3-137

Sally Miller, millersa@mit.edu, Thu. 12:30-2:30PM in 3-436

Amit Gandhi, amitg@mit.edu, Thu. 7-9PM in 3-436

Announced on 06 December 2017  12:24  a.m. by Ali Talebinejad

Corrections to CA5_prob5a.m

A couple of fixes are necessary for CA5_prob5a.m, the "starter code" for problem 5 on the current computer assignment. In the definition of Rx, the rotation matrix about the x-axis (starting on line 32), the final row of the matrix (line 34) currently reads:

sin(a) 0 cos(a)

Instead, it should read:

0 sin(a) cos(a)

Also, please add the text "Bn = B;" after the current line 44 and before the current line 45. That is, lines 44-46 should read:

i=1;
Bn = B;
for z=-150:5:150

Sorry for any confusion these issues may have caused.

Announced on 30 November 2017  4:44  p.m. by Jeffrey L Moran

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