Questions about Body Energy Coefficient, Bounce % and Pivot Energy
Posted: Mon Jan 13, 2020 10:08 am
Art
I've regression tested some of my previously published Augie vector processing (AVP)
simulations (binomial distribution, walking man, and gravity escapements) and they
all work properly as they did with earlier versions of AVP.
I have been experimenting with various object settings hoping to understand the
effects of:
Body Energy Coefficient (BOE){default .99}
Bounce % {def .5}
Pivot Energy {def .9999}
So far I've been guessing at the first two parameters.
The attached are some of my experiments which I try to run ~30-40% speed:
A_BounceTest-Coef .5.vcp Body Energy Coefficient .5
A_BounceTest-Coef .99.vcp Body Enerby Coefficient .99
Within each test I vary the bounce % from ~0 to 1 in steps of .1
From observing the bouncing squares it would seem that I should interpret
Bounce % of .5 as 50% rather than .005
The BOE is probably related to the Bounce % but I'm not exactly certain.
Is BOE the same thing as coefficient of restitution (COR)? Where a body during a collision
loses (or doesn't absorb all) of the input kinetic energy so that a BOE of 1 would be
no loss of energy and BOE of .6 would be absorbing 60% (or losing 40%).
I have not experimented too much with Pivot Energy to figure out the physical meaning of that parameter.
My goal is to create a simulation of the desktop toy sometimes referred to as Newton's cradle.
I'll publish my experiment with that in a separate post.
Bill Michael
I've regression tested some of my previously published Augie vector processing (AVP)
simulations (binomial distribution, walking man, and gravity escapements) and they
all work properly as they did with earlier versions of AVP.
I have been experimenting with various object settings hoping to understand the
effects of:
Body Energy Coefficient (BOE){default .99}
Bounce % {def .5}
Pivot Energy {def .9999}
So far I've been guessing at the first two parameters.
The attached are some of my experiments which I try to run ~30-40% speed:
A_BounceTest-Coef .5.vcp Body Energy Coefficient .5
A_BounceTest-Coef .99.vcp Body Enerby Coefficient .99
Within each test I vary the bounce % from ~0 to 1 in steps of .1
From observing the bouncing squares it would seem that I should interpret
Bounce % of .5 as 50% rather than .005
The BOE is probably related to the Bounce % but I'm not exactly certain.
Is BOE the same thing as coefficient of restitution (COR)? Where a body during a collision
loses (or doesn't absorb all) of the input kinetic energy so that a BOE of 1 would be
no loss of energy and BOE of .6 would be absorbing 60% (or losing 40%).
I have not experimented too much with Pivot Energy to figure out the physical meaning of that parameter.
My goal is to create a simulation of the desktop toy sometimes referred to as Newton's cradle.
I'll publish my experiment with that in a separate post.
Bill Michael