## Topic outline

• ### General

Welcome to the course!

(last edit: 23.12. at 22.35 o'clock)

Latest news:

Thank you for the participation and Happy Holidays!

... and the information should be in SISU now.

boundary 94 points -> 5
boundary 88 points ->4
etc.

BW,

Jyrki

Simscape Simulation assignment 1 has been graded.

In the grading, it has considered as an "error", if the cylinder A pressure signal has been taken "after the Counterbalance valve". (see the figure below)

- The pressures really are different during lowering(!).

- With the A chamber pressure ("before the Counterbalance valve") the a) load (mg) is held and b) the B chamber pressure force compensated. -> relatively small pressure

- The pressure "after the Counterbalance valve" consists of pressure losses in pipe, proportional control valve and tanket inlet piping ,and also dynamic pressure is lost in the tank (check Bernoulli equation) -> relatively small pressure

- During lifting the Check Valve causes a small pressure difference (cracking pressure is 0.3e5 Pa). The pressures "before" and "after" are very close to each other.

However,  because this "error" was also made (inadvertently) by teacher during the teaching session, the "errors" made by the students will be compensated in grading. So, at the moment, the grading is not finished. This "error" was quite useful from pedagogical perspective.

Sorry for the inconvenience!

Assignment 2

Simscape Simulation assignment 2 (GROUPS)

....................................................................................................

On Wednesday 23.11.2002 there was NO simulation session.

We can use part of Tuesday's session (29.11.) to go through the once more. The Deadline is 30.11.2022.

Thank you for visiting our laboratory!  (Laboratory visit on Tuesday 22.11.2022)

If you have any questions related to the demos, we are happy to answer!

Points for you and your Group have been given:

- 2 points, if your Research group has attendance (some members of your group visit the laboratory)

and

- 2 points, if you attend the laboratory visit personally

(this means that: maximum is 2 + 2 = 4 points)

Location of laboratory:
K4 building, Sähkömiehentie 4
Use the laboratory door behind the building (see the red arrow in the map below).

Otaniemi Campus MAP:

Other (older) "news":
Simscape Simulation assignment 2 (GROUPS)

Nice work with the Mathcad templates!

The long and complex assignment was probably not too easy.

Many relevant problems had to be solved during the assignment.

You did very well!

(also, in the assignment mailbox, 30.10.2022)

simulation sessions

Simulation assignment 1:

Deadline has been updated 4.11.2022 -> 16.11.2022

Undergraduate Center corridor door locked (room U344) -> if you cant' get in the class

Instructions by the university:

Some new instructions for Assignment 1 have been made -> check the recording available on 13.10.2022

- Assignment for each student: explanation of simulation assignment (LS controller) (Powerpoint file available under

- Assignment for each GROUP: Assignment 1, filling the template, workflow

Link to online-lectures in TEAMS (below)

Join Microsoft Teams Meeting

https://aaltofi.sharepoint.com/:f:/r/sites/MEC-E5004-FluidPowerSystems/Shared%20Documents/General/Recordings?csf=1&web=1&e=DZAgN2

simulation sessions

Literature hint in the internet:
Click library: learning center

for Book

Hydraulic control systems

Manring, Noah, author. 2020

Issue with recording on 11.10.2022. -> Check NEW recording instead - related to Assignment 1 (13.10.2022)

- "Studio recording" without students

- Sorry for the inconvenience!

- The Assignment 1 will explained during the following weeks starting on 20.9.2022.
- The Simscape Simulation assignment 1 started on Wednesday 5.10.2022 in U344 (Undergraduate Centre) and in TEAMS
The simulation materials are available, some materilas (hints) still under construction.
In our Fluid Power courses we will use …
• Matlab
• Simscape Fluids (in this Systems course, remember to install "Fluids" package, also if you use your own computer)

Check

FFPA, Finnish Fluid Power Association        (in Finnish only)

CETOP pages                                                (in English)

Lecture materials (<- click for lecture slides etc., those are under Materials)

- slide set 1A

- slide set 1B

- slide set 1B

- slide set 2

- Digital Hydraulics

Assignments (<- click for assignment materials)

Assignment 1 documents ready for the Groups.

Normally

Classroom is 202 of Konetekniikka 1 (K1 building), street: Otakaari 4

Lecture time is 16.15 - 18.00

Check the MAP below.

Schedule (DRAFT)

Otaniemi Campus MAP:

Simulation sessions in room U344 (3rd floor of Undergraduate Centre)
MAP (page 4 -> floor 3):

jyrki.kajaste@aalto.fi

BW,

Jyrki

Course:

You can see the schedule on the right side ->

In our Fluid Power courses we will use …
• Matlab