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MECH&AE 171A · Dis 1A

Introduction to Feedback and Control Systems: Dynamic Systems Control I

Fall 2026Gedney, Q.4 units

Seats, time, final and grades

Seats

Closed by the department.

74 enrolled enrolled. The department published this count and no capacity, so there is no share to fill.

Read 18 hours ago. The latest refresh is overdue. Seats and instructors may have changed since. Check the registrar before enrolling.

Its lecture reads closed by the department (74 enrolled): you attend both, so this seat is not one you can take while that holds. No waitlist listed.

Meets

F 12:00pm-1:50pm

This discussion only. You also attend Lec 1.

Final

Mon 7 Dec, 8:00am to 11:00am

One exam for the whole class, Los Angeles time.

Read 7 days ago.

Grades

3.09

Predicted GPA

Historical records across all instructors; 1,153 letter grades

dibs has seen this section open 3 times since 18 August. The last time was 20 September.

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When you can enroll

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A watch slot

25 per account. A lecture watch also covers its discussions. Paused watches still use a slot.

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Before you can enroll

Registrar's Restrictions cell, read 7 days ago: "Undergraduate School of Engineering Majors".

Tell dibs what you have already taken and this line will say which of these you have. Your list.

From the registrar

Students who enroll in upper-division courses offered by the Samueli School without completing the requisites are subject to disenrollment after the second class meeting. If necessary, consult with an OASA counselor through MyUCLA Message Center.

Restrictions checked 7 days ago and may be outdated. Unwatched sections are rechecked less often than watched sections. Check the registrar before counting on a seat.

When it meets

This discussion and its linked lecture.

Mon
Tue
Wed
Thu
Fri
12pm
1pm
2pm
3pm

Lec 1

2pm-3:50pm

Lec 1

2pm-3:50pm

Dis 1A

12pm-1:50pm

Scroll sideways for the whole week. All meeting times are listed below.

  • Dis 1A

    F 12:00pm-1:50pm

  • Lec 1 (required lecture)

    TR 2:00pm-3:50pm

Royce Hall 362

Grades

3.09

Predicted GPA

Historical records across all instructors; 1,153 letter grades

Of the 7 people in the grade record for MECH&AE 171A, the 2 with the most grades: IWASAKI, TETSUYA at 3.10 over 424 grades and LOPEZ, BRETT THOMAS at 3.15 over 340 grades.

A range
41%
P/NP
0%
D/F/W
6.6%

Full grade history for MECH&AE 171A

What students say

dibs measures outcomes: grades, seats, how fast it fills. For what the class is actually like to sit in, BruinWalk has the reviews.

What the work looks like

  • 2 exams, 10 mentions in past reviews
  • Quizzes mentioned, no number given, 1 mention in past reviews
  • 8 problem sets, 8 mentions in past reviews

Based on 30 reviews; source checked about 1 month ago. dibs counts only what a review actually states, so a kind of work nobody mentioned is absent rather than zero.

Reviews for MECH&AE 171A Search the reviews for Q. Gedney

Will it still be here

no history chance of closing before your enrollment pass.

Final enrollment per term from four years of grade data. Summer excluded: different population, different pass structure.

  • 9521F
  • 8522W
  • 6722S
  • 9022F
  • 8423W
  • 6023S
  • 8323F
  • 8524W
  • 6324S
  • 8024F
  • 8625W
  • 8925S
  • 7825F
Enrollment by term: 21F 95, 22W 85, 22S 67, 22F 90, 23W 84, 23S 60, 23F 83, 24W 85, 24S 63, 24F 80, 25W 86, 25S 89, 25F 78

Peak 95 · most recent 25F at 78

Seats over time

Nothing read since 16 Oct, 18 hours ago. Over about 2 months before that, freed 6 seats.

3 times reopened
74 of 80 · no seats left
18 Aug 19:4017 Sep 04:2616 Oct 13:12 · 18 hours ago
Checked 168 of the 1260 hours with hourly history, 13%. No reading was recorded in 1092 hours. dibs had no hourly record before 25 Aug, which is the other 151 of 1411 plotted.74 of 80 enrolled at the newest reading, 18 hours ago, and no seats left. Seats from 18 Aug 19:40 to 16 Oct 13:12, 80 to 74. Checks are not continuous monitoring. Changes between checks may be missed.

A dot is a reading where something moved: the seat count, the status, or the waitlist. Flat between dots joins recorded counts; changes between reads may be missed. The line starts when dibs first saw this section rather than reaching back before it existed. The last one is the last time dibs read this section, moved or not, and that was 18 hours ago. It is where the line stops, not where the count is now.

Show the readings (28)
Recorded Enrolled Capacity Status Waitlist Hours read
16 Oct 13:12 74 0 closed by the department - 4 of 19
15 Oct 19:42 74 0 closed by the department - 20 of 138
10 Oct 02:32 75 0 closed by the department - 25 of 201
1 Oct 18:32 76 0 closed by the department - 2 of 4
1 Oct 15:02 77 0 closed by the department - 2 of 5
1 Oct 11:32 76 0 closed by the department - 3 of 15
30 Sep 21:42 77 0 closed by the department - 6 of 27
29 Sep 19:22 78 0 closed by the department - 2 of 8
29 Sep 12:22 79 0 closed by the department - 3 of 15
28 Sep 22:32 80 0 closed by the department - 2 of 4
28 Sep 19:02 81 0 closed by the department - 2 of 5
28 Sep 15:32 80 0 closed by the department - 10 of 61
26 Sep 03:42 81 0 closed by the department - 2 of 5
25 Sep 23:32 82 0 closed by the department - 6 of 36
24 Sep 12:22 80 80 closed - 4 of 20
23 Sep 17:52 78 80 open - 13 of 90
20 Sep 00:52 79 80 open - 8 of 53
17 Sep 20:32 80 80 closed - 6 of 33
16 Sep 12:02 79 80 open - 36 of 304
3 Sep 21:40 80 80 closed - 9 of 70
1 Sep 00:40 83 0 closed by the department - 3 of 12
31 Aug 13:40 79 0 closed by the department - 2 of 11
31 Aug 03:40 80 0 closed by the department - 2 of 6
30 Aug 22:40 80 80 closed - 2 of 2
30 Aug 21:40 80 0 closed by the department - 18 of 159, 19 no hourly record
24 Aug 07:40 80 80 closed - no hourly record
20 Aug 23:40 79 80 open - no hourly record
18 Aug 19:40 80 80 closed - -
How readings and alerts work

Dated seat counts can be available even when hourly check history is missing. Gaps do not show whether seats changed between observations.

Seat counts show the last successful read, not live availability. Refreshes can be delayed by request limits or upstream interruptions. Watched sections receive priority, but an hourly update for every section is not guaranteed.

The registrar can change a seat count between our checks. Alerts depend on dibs detecting an opening and completing delivery; a quiet watch does not prove that no seat opened. Check the registrar before enrolling.

Class chat

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Dis 1A shares one room with Lec 1 and every other discussion under it, because that is what a student means by "my class".

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