digress | Sometimes call a block in the middle of a pipeline
kandi X-RAY | digress Summary
kandi X-RAY | digress Summary
TODO: Write a gem description.
Support
Quality
Security
License
Reuse
Top functions reviewed by kandi - BETA
Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of digress
digress Key Features
digress Examples and Code Snippets
Community Discussions
Trending Discussions on digress
QUESTION
For a project I have, I control a BLDC motor with it's own current controller.
To design a controller for the motor I fitted some time traces to the flowing function:
to capture the dynamics of the entire system, namely, motor, current controller/driver and load.
J is the rotor inertia, [kg*m^2]
r a dampening constant (linear friction)
tau is a torque constant [Nm/A]
u[t] a current input
der(der(phi)) is the angular acceleration
der(phi) the angular velocity
The fitted values represent the entire system more than good enough for a 'continuous' approximation of the motor, the load and the current controller/driver of the motor. With the control scheme, I give a signal u(t) in Amps, and I expect a torque and an angular velocity as an output. At the time I only needed the angular velocity, but I digress, this method worked fantastically, but was fitted and designed in mathematica.
I would like to build a much larger, and significantly more complex robotic system within modelica (Systemmodeler specifcally, however, modelica library 3.2.x), however I am having some issues.
My first attempt was:
However, when simulating this with another outside load (an external model), I have a lot of issues, from some those more experienced than I, I am told this form of modelling is 'one way' and not the 'modelica method' but more simulink in form.
Namely, it should be bi-directional, not just numerical outputs, in order to correctly react with the multibody external model, this will connect to.
My second attempt was:
Which when connecting to my larger multibody model, it does indeed work more like it's expected to, there is a reaction from this model, when external torques/loads are applied. However, when simulating this model to see how it fairs compared to the pure block model, they arn't the same by any means. I had to spend a lot of time trying to fit the inertia and friction data to get similar results.
SO my question is, what is the best method, to turn pure block models (mathematical ones) or atleast,my pure block model, into a more realistic model or atleast, the connecting outputs into more realistic, or I guess 'acasual' ones.
I would prefer not to use my second attempt, since I can't trust the values I had to adjust compared to the block to actually be correct, since they arn't fitted values to real world data, compared to my first model.
...ANSWER
Answered 2021-May-17 at 05:56Difficult to answer in general. Basically you need to understand which model corresponds to which part of the system/equation you want to model and then combine them to result in the same overall behavior.
The original model/equation seems consist of (correct me if I'm misunderstanding the equation):
- An inertia corresponding to
J * dot(dot(phi))
- A linear friction model corresponding to
r * dot(phi)
- A torque resulting from an input multiplied with a constant (in this case likely a torque constant multiplied by a input current) corresponding to
tau * u(t)
If you don't know the components I think there is no way besides investing time into understanding the Modelica code or at least the documentation of each component.
I would use the following components to describe the behavior
Modelica.Mechanics.Rotational.Components.Inertia
Modelica.Mechanics.Rotational.Components.Damper
- This can be done combining
Modelica.Blocks.Math.Gain
andModelica.Mechanics.Rotational.Sources.Torque
As an extension I would suggest to use the physical quantity (current) as an input. This can be done by changing the model to:
Extending the model with two more meaningful components (Resistance and Inductance as asked for in the first comment) results in:
Note: The model is actually a 1~ representation of a 3~ motor. I think the parameters for terminal resistance/inductance should still be valid, but I would strongly suggest to validate the model by e.g. computing speeds at no-load operation and nominal load.
In case you need the code from which the above screenshots were generated (using MSL 4.0.0):
QUESTION
I have a table of permissions, a table of roles, and a mapping table. I'd like to create a GUI for a website admin to be able to add new roles and assign permissions to that role. Currently it's done at the database as such subject to user error.
For sake of simplicity, let's say we have four roles, SuperAdmin, Admin, Manager, and User. Permissions are Create, Read, Update, Delete. In the diagram below SuperAdmin and Admin match as do Manager and User (product of a user error and further why I'm wanting to create the GUI but I digress).
Currently my output displays a row for each Role whereas ideally the Role would be only displayed once and the appropriate checkbox would be ticked for the corresponding Permission similar to the following:
Here is the CF code I have and I don't know how to approach this to do what I want.
...ANSWER
Answered 2021-May-15 at 13:49If the source tables are small, a simple approach is combining a cross + outer join to return all possible values. Then "group" the query output into rows. Cross joins are good for producing "all combinations", but table size matters. Joining 2 tables of 1000 rows each produces 1 million rows! So size is an important consideration.
QUESTION
Intellij IDEA driving me nuts with bad behaviour:
I have one (Gradle-based) Project with two main classes written in Java, each in its own package.
- One is called "HelloFX"
- One is called "ImageViewExample"
Both use JavaFX so need some special "Run configuration".
- For "HelloFX"
- For "ImageViewExample"
The configuration is the same in both cases (It would be nice to not have to deal with a baroque complex set of textboxes and just have everything in an attribute-value text description, that one could copy-paste too, but I digress)
Everything works perfectly well for application "HelloFX" but for application "ImageViewExample", the message is that "Class 'pack2.ImageViewExample' not found in module 'JavaFXTrial.main'.
Something precludes Intellij IDEA (or rather, the Gradle runtime?) to discover the main class in one case, but not in the other case.
The compilation has definitely worked perfectly, after compilation:
...ANSWER
Answered 2021-Apr-12 at 13:20All right.
It turns out that the widget for Build and Run is whitespace sensitive...
Which becomes obvious if one looks at the workspace.xml file
QUESTION
this is my first post. In a couple years of playing around, so far I have been able to find solutions to problems but I am finally stuck, mostly because I think my wording and lexicon is wrong but I digress.
I have two tables lets say tweets and likes ..
Likes
...ANSWER
Answered 2021-Feb-23 at 11:59When doing an outer join, put the constraining condition (likedby = 'C'
) inside of the on
of the join. If you apply that condition in the where
, then the row will be dropped from the result set.
QUESTION
I have two strings/arrays. I know, I find it hard to tell the difference. It's too early to digress though.
String one is a comma separated string for arguments sake. So is string two. String two contains some, but not all of the values found in string one.
What I'm trying to do is subtract the values from string one that are found in string two.
There are a whole load of variations of this question and answers both on SA and the rest of googledom. However nothing has worked for me. Every time errors were thrown up.
The code below is the closest I have managed to get, but for some reason, in the console, only the first part of string one is counted, not the rest that proceed it. This may be where the string/array mixup comes in. The example given works perfectly on SA Link to the example
The code used is as follows:
...ANSWER
Answered 2020-Dec-06 at 18:38You're declaring separate variables, not a list of variables, here:
QUESTION
I have a barcode scanner that reads barcodes coming down a manufacturing line, and then will send the read UPC to an IP:port as an I/O device over ethernet.
Initially, the people who built this anticipate that you will have a windows machine with a controller open writing the scans to a text file. I'm not sure how that's useful to anyone, but I digress. The system works essentially as a keyboard, that spits out to an open port.
I would like to be able to trigger a script once the return key is detected. I am running rhel fedora centos 8, and I assume that I can set up a bash that is called by something listening to a port.
I'm a software dev, and server configuration is not what I normally work with. After a lot of googling I'm still unsure of the following:
- which listener is best for this use case, so I can narrow my search? I've found the socat command, but don't fully understand it.
- if I'm using socat, or any listener, for that matter, how do i tell it to stop and submit to a script on return? how does it know when the message has ended?
- can i tell it to call a PHP file? i need to store these reads to a database, and PHP is already on the server, so that seems like the simplest choice.
Thanks for any help you can provide. I just need some basics so I can fine tune my google search. A lot of what comes back is setting up port 80 through Apache, and the searches are just flooded with red herrings.
...ANSWER
Answered 2020-Nov-20 at 16:49You can pipe the output of netcat directly to a script (in your favorite language) that reads and processes tha data.
QUESTION
Ok I've been pondering this all weekend and I'm running in circles and confusing myself about it; so someone please help. Here's the scoop: I have an app with a RecyclerView to hold CardView items. Here is the layout:
...ANSWER
Answered 2020-Nov-09 at 02:06Try the following code, see if it helps. I've changed some code in both files. You're now not creating a new listener every time an item is added, which might help.
MainActivity.java
QUESTION
hitting a bit of roadblock on what seems to be something pretty straightforward:
Doing some testing for a user service, on a create method which is pretty basic:
...ANSWER
Answered 2020-Oct-26 at 23:39Like @known-as-bmf said, create
returns a Promise
, so you can't assert using toThrowError
(which works only for synced assertion).
In order to test a rejected Promise, you should use rejects
, like this:
QUESTION
The question relates to IBM Watson Assistant dialog management.
I have implemented a digression workflow that is triggered by a certain user intent. Unfortunatelly, the minimal confidence level when this intent is recognized is too low for my use case.
Is there a way to adjust/force certain confidence level with regards to specific intents?
Best regards.
...ANSWER
Answered 2020-Oct-26 at 23:19Yes, you can do this globally for the the top 10 intents that are returned by using
intent[0].confidence > 0.00
This will mean that you're node will only trigger if the confidence is above a certain threshold
or you can do a combination of the rule on your dialog node to make it more accurate. Specifying the [0] means that Watson will make sure that the highest scoring intent is above a certain threshold for confidence.
#Intent && intent[0].confidence > 0.99
QUESTION
I am writing a small utility composed by :
1) 4 QToolBar
2) 1 QToolBox
3) 1 QMenu
4) 1 QGraphicsView
I have some buttons on the QToolBox
, each button represents a grid with different spacing.
Everytime a user clicks a button on the QToolBox the spacing on the
QGraphicsScene` changes.
I use daily the new notation and never had any problems with it until I had to use an "abstract" entity such as the QAbstractButton
approach.
the problem I have is that I don't seem to properly set the connection signal/slot of the QAbstractButton
:
mainwindow.h
...ANSWER
Answered 2020-Oct-14 at 19:17You have the following errors:
- QButtonGroup does not have the
clicked
signal butbuttonClicked
. - You must not use
()
.
The syntax in general is: obj, & Class_of_obj, in your case backgroundButtonGroup is QButtonGroup and this is MainWindow so preliminarily the syntax is:
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install digress
Support
Reuse Trending Solutions
Find, review, and download reusable Libraries, Code Snippets, Cloud APIs from over 650 million Knowledge Items
Find more librariesStay Updated
Subscribe to our newsletter for trending solutions and developer bootcamps
Share this Page