I graduated in mechanical engineering 2 years ago, you don't use everything you learned everyday and eventually you start to slowly forget what you learned. Thank you for the refresher, I think videos like this do so much more because you explain how the variables affect the system, something that wasn't always made fully clear to use during college.
So is there a version of the formula where you can find the position at t=_ if you have a known input? For example if I applied a known impulse to the system is there a way I can find the position at any point t?
Any way you could create a model including spring preload (as available on an MC shock) as a variable? The internet is full of righteous explainers blasting that preload is not affecting stiffness (sure, it has no effect on k)...but fail to explain why the suspension "feels" stiffer with more preload. Thank you for the great video.
More preload is going to hold you higher in the stroke, meaning it will take more travel from equilibrium (and thus more work as well as force) to bottom out. What many tuners leave out when looking at a spring curve, is the area under that curve. Whenever I mess with dirt bikes or mountain bikes, I look at the spring curve for small bump compliance and chassis stabilization (fore-aft), and the area under the spring curve for big hit control.
Short answer: Eulers Long answer: I made columns for position, velocity, and acceleration. The acceleration is based on the forces (load, spring and damper) acting on the piston. Then I applied the kinematic equations and initial values to drive position and velocity. Excel treats the motion as though it is constant acceleration for 0.01s, then in the next row excel recalculates the new acceleration and thus updates the velocity and position.
@@INTEGRALPHYSICS thanks a lot for the explanation! by the way I found out that there is a simulation in wolfram that also plots this motion (ın a way) I would reccomend you to have a look at it, that might be a lot easier :)
I used Eulers and set up related columns for x, v, a and f. where ma = -bv. v=a*deltat and x=v*deltat. I set the time intervals to like a 100th of a second then graphed x vs t
I graduated in mechanical engineering 2 years ago, you don't use everything you learned everyday and eventually you start to slowly forget what you learned. Thank you for the refresher, I think videos like this do so much more because you explain how the variables affect the system, something that wasn't always made fully clear to use during college.
i just cant tell you how smooth that was !! thanks brother
No problem 👍
A friend just sent this over - super helpful!
Sounds like a good friend.
This movie is so interesting. I hope you will have more good videos in the future.
More to come!
Exceptional Explanation
thanks!
insanely clear explanation, thanks for your great work
You're very welcome!
Super helpful!.. Thanks, keep going.
So is there a version of the formula where you can find the position at t=_ if you have a known input? For example if I applied a known impulse to the system is there a way I can find the position at any point t?
Nice bro excellent work. Bro can you please similar videos for different concepts in physics?
I would love to. Any suggestions?
Video is very helpful for me. Please tell me, which program did you use for plot of motion ?
Excel.
How does one go about evaluating one of the variables, say b
awesome! thank you very much
Glad it helped!
Any way you could create a model including spring preload (as available on an MC shock) as a variable? The internet is full of righteous explainers blasting that preload is not affecting stiffness (sure, it has no effect on k)...but fail to explain why the suspension "feels" stiffer with more preload. Thank you for the great video.
More preload is going to hold you higher in the stroke, meaning it will take more travel from equilibrium (and thus more work as well as force) to bottom out. What many tuners leave out when looking at a spring curve, is the area under that curve.
Whenever I mess with dirt bikes or mountain bikes, I look at the spring curve for small bump compliance and chassis stabilization (fore-aft), and the area under the spring curve for big hit control.
Hi! could you explain how did plot the motion in excel? I would like to try it by myself
Short answer: Eulers
Long answer: I made columns for position, velocity, and acceleration. The acceleration is based on the forces (load, spring and damper) acting on the piston. Then I applied the kinematic equations and initial values to drive position and velocity. Excel treats the motion as though it is constant acceleration for 0.01s, then in the next row excel recalculates the new acceleration and thus updates the velocity and position.
@@INTEGRALPHYSICS thanks a lot for the explanation! by the way I found out that there is a simulation in wolfram that also plots this motion (ın a way) I would reccomend you to have a look at it, that might be a lot easier :)
Will do. Thanks!
Awesome!
Thanks!
hello I loved this video so much, but I want to know how to make this excel sheet form this equation
I used Eulers and set up related columns for x, v, a and f. where ma = -bv. v=a*deltat and x=v*deltat. I set the time intervals to like a 100th of a second then graphed x vs t
Nice, good explanation. thanks so much
Where i can find the excel for the damping?
Oh, mountain forks have damping? I guess we're not talking about Rockshox motion control haha.
true.
Is it a bycicl system??
x_ddot = d^2 x / dt^2... but besides that awesome vid
For some stupid reason I never seem to notate that right.