Recent content by frasool

Yeah you have to register for it. Just so you know its a free registration :p. Moving on, I did check the dimensionless nature of the equation and only Newtons fits in here. Self aligning torque would be something required for the braking purposes . i don't think it would be used in this...

I did go through these posts Mike. but i still cannot find a solution to my problem. What would be an appropriate value for the tire slip coefficient. I don't know how to find the lateral force on the tire because i don't have enough information unfortunately.

the equation used is as follows: Vc = \frac{Cd*T}{2*Iw} + 0.5*\sqrt{[Cd*T/Iw]^{2} +(2B^{2}K_{s}T)/Iw} Vc, Shimmy speed (m/s) T, caster offset distance(m) Iw, mass moment of inertia(kg.m^{2} Cd, torsional Damping (N-s-m) B, Tread Distance(m) Ks, Tire Slip Coefficient (N) Reference: US...

Bob your theory is interesting as well . but it does not solve the problem about how to get the tire slip coefficient. I get its definition now, but its not unitless that's what i have learned. It has units of N/ rad but since radians are unitless it just has N as units. Jack gave good insight...

hmmm. So I did go through that reference Jack. The cornering stiffness would be the same as tire slip coefficient but the problem is ves can we measure the lateral force to determine the tire slip coefficient. The reference gives range of values for the cornering stiffness coefficient which is...

wow that's some new information man. thanks a lot. I am screwed basically cause i cannot get my design completed without that value!.

ooh ryte. but how does ths link to tire slip coefficient?

acceleration = m/s^2. this won't cancel out

i did go through your post . So your saying this has links to longitudinal and lateral forces. hmm the formulae that your using: Force = acceleration * weight* ch height/ wheel base Question how valid is this formulae cause this isn't dimensionly consistent as left hand side has units of N...

Hi Im working on designing a caster wheel and have a mathematical model that I am following. However I am stuck with how to determine the "tire slip coefficient". Its measured in Newtons. At first I thought its a coefficient so normally would be unitless but only a parameter with Newtons...

hmm. i require it about its vertical axis. So i just consider the z values then i suppose.

im in my second yr of mechanical engineering. i took physics course a year ago so don't remember that much but i do know what it signifies. Its similar to Steiners Theorem. I know its sued for rigid bodies and its application Point is I don't know how to use the 3 by 3 matrix in my calculations...

my friend if i knew wht the solution to my problem is i would not be asking you. I have spent days on this problem and have to get it done real soon that's why i asked. I can't figure out what the significance of these values is. So I am going to do my own calculations now. One question for...

hmmm Well solidworks gives me three different types of values: 1. Principal Axes of inertia and principal moments of inertia 2. Moments of inertia taken at Center of mass and aligned with the output coordinate system 3. Moments of inertia taken at output co-ordinate system Could you...