×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Are you an
Engineering professional?
Join Eng-Tips Forums!
• Talk With Other Members
• Be Notified Of Responses
• Keyword Search
Favorite Forums
• Automated Signatures
• Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

#### Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

# how to generate random accelerometer signal in SIMULINK?

## how to generate random accelerometer signal in SIMULINK?

(OP)
Hello,

This is Julia and I am new to SIMULINK.

Can I ask if anyone know how to generate random accelerometer signal in SIMULINK?

I need to use the generated signal for human movement recognition algorithm test purpose.

### RE: how to generate random accelerometer signal in SIMULINK?

Is there anything special about the accelerometer signal? Or is random, random? If so, just look in the Sources library: White Noise, Random Number, Signal Generator can all give you a random signal, for various definitions of random.

If by "random", you don't mean mathematically random and instead mean an arbitrary human movement acceleration signal, then there might be a bit more work to do. In that case, the Band-Limited White Noise might still do the trick, or you might even plug the Random Number into an Integrator or two to get a smoothed random signal.

If even that is too unrealistic, perhaps a number of Signal Generators set to sine function into a Sum block might do the trick?

Anything there close to the mark?

### RE: how to generate random accelerometer signal in SIMULINK?

(OP)
Dear "LiteYear",

Thank you very much for the reply! And my "random" means an arbitary human movement acceleration signal (x, y, z axes).
My project is to develop a software system which detect elderly fall and distinguish normal activities (walking, stand up, sit down, fall).

I need to implement by simulation: Get activity acceleration signals in xyz axes and use those signals in the fall detection algorithm. As there is no hardware included, I guess I need to generate my own random acceleration signal.
According to your suggested ways, I guess I will try to get 3 siganl generators (sine wave function) and sum them together to create my acceleration signal.
Regarding Band-Limited White Noise, I will look into it too!

I don't know whether I ask too much, regarding human movement model (walking, standing up, sitting down, falling), any idea how can I get the equations of the model? Any references that can reconmmend to me?

Thanks!

#### Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

#### Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

#### Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a partâ€™s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

Close Box

# Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

• Talk To Other Members
• Notification Of Responses To Questions
• Favorite Forums One Click Access
• Keyword Search Of All Posts, And More...

Register now while it's still free!