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Nathaniel Goldfarb


Last seen: 1 year ago |  Active since 2021

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cannot extract data from figure with multiple lines
Hello, I have a matlab figure with muliple lines in it that I am trying to extact. However I can only get the figure line. I...

2 years ago | 1 answer | 0

1

answer

Question


match hardware update frequency in simulation
Hello, I am trying to tune my Simulink controller for a system I built. My communication speed is about 350Hz using Serial comm...

2 years ago | 1 answer | 0

1

answer

Question


Control sending frequency for serial communication
I am trying to read/write data from an arduino over serial using Simulink. I am sending two floats down (as sin waves for now) a...

3 years ago | 0 answers | 0

0

answers

Question


Synchronize Serial communication between simulink and Arduino
I am trying to build a model that sends two floats over serial to an arduino and waits for two values to be sent back. For now a...

3 years ago | 1 answer | 0

1

answer

Question


Matlab crashes when using ROS toolbox
I am using the ROS toolbox along with the responce tool kit to optmize my controller. IT work most of the time but sometimes i g...

3 years ago | 0 answers | 0

0

answers

Answered
I want to optimize two parameters for my model
Yes You can use the responce optimization toolbox, you can then choose what varbiles you want to optimize

3 years ago | 0

Question


variables only changing by small amount in response optimizer
I am trying to use the responce opertizer using Simplex method. The magntidue of my varibles is in 10^3 but they appear to only ...

3 years ago | 0 answers | 0

0

answers

Question


how does the scale parameter work in the response optimizer
I am trying to use the repsonce optmizer in simullink to optimze severla varbibles for my controller. My question is how does th...

3 years ago | 0 answers | 0

0

answers

Question


change search range of response optimization
I am trying to use the Responce Optimizer package in simulink. I set up the search range for my all my tuning design varibles. ...

3 years ago | 1 answer | 0

1

answer

Answered
Warning: Initializing MATLAB Graphics failed
I solve the problem by following this answer: https://www.mathworks.com/matlabcentral/answers/364986-matlab-error-graphic

3 years ago | 0

| accepted

Question


Warning: Initializing MATLAB Graphics failed
I got the following error today when I restarted matlab and I am not sure how to fix it Warning: Initializing MATLAB Graphics...

3 years ago | 1 answer | 0

1

answer

Answered
no IP in Gazebo virtual machine
I was able to solve this problem using this: https://askubuntu.com/questions/1073031/ubuntu-18-04-internet-connection-not-wor...

3 years ago | 0

| accepted

Question


no IP in Gazebo virtual machine
I was using the VM provided by Mathworks with not problem. When I booted it up today the VM did not have a IP address. I am no...

3 years ago | 1 answer | 0

1

answer

Question


Error:Brace indexing is not supported for variables of this type.
I am using the Responce optmization toolbox to optmize my controller and I am getting the following error: === Design Optimiz...

3 years ago | 1 answer | 0

1

answer

Question


optimization for reference tracking
Hello, I am trying to find optimal parameters for my sliding mode controller. I am using the Responce optimizer app to get t...

3 years ago | 0 answers | 0

0

answers

Answered
communicating with node in VM
Followed this to solve the problem: https://www.mathworks.com/help/ros/ug/get-started-with-gazebo-and-a-simulated-turtlebot.html...

3 years ago | 0

| accepted

Question


communicating with node in VM
I am having trouble communicating with my MATLAB ROS ndoe. I am deploying my node into my VM and trying to see the topic. While...

3 years ago | 1 answer | 0

1

answer

Question


Brace indexing is not supported for variables of this type in Simulink
I have been having a lot of trouble building and runing simulink models with custom messages. Nothing I seems to do works. It...

3 years ago | 1 answer | 0

1

answer

Question


Unrecognized message type in ros simulink
I am having problems building and running my simulink model. I am try using a custom message in a service but when I try to buid...

3 years ago | 1 answer | 0

1

answer

Answered
speed up ROS controller loop rate
Here is my model. Thankyou for all the help

3 years ago | 0

Solved


Times 2 - START HERE
Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y. Examples:...

3 years ago

Question


speed up ROS controller loop rate
I am using a MATLAB 2021a. I made a sliding mode controller to control a robot in a simulation. I have been following severa...

3 years ago | 2 answers | 0

2

answers

Question


measure the ROS loop time in simulink
I am trying to figure out my control loop time in simulink for controlling my simulation using MATLAB 2021a. I am using the loo...

3 years ago | 1 answer | 0

1

answer

Question


ROS simulink controller is slow
I am trying to build a controller in simulink to interact with ROS and custom simulation of my robot. The controller is rather c...

3 years ago | 0 answers | 0

0

answers

Question


custom ROS service bus assignment
Hello, I am trying to call a ROS service using a custom service message in simulink. I have successfuly followed the instr...

3 years ago | 1 answer | 0

1

answer