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  • Users: hutch325
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  1. hutch325

    Understeer gradient of modern passenger cars

    I do a fair amount of vehicle testing on the commercial vehicle side of things, and along with that comes lots of rental cars used for travel to the test facility. Lately I've noticed that it seems like modern passenger cars don't have much understeer, at least not as much as I would expect. In...
  2. hutch325

    Force based analysis

    I'm looking to analyze the suspension of a vehicle that is essentially SLA front and rear, on a force based basis. The goal is to determine lateral load transfer as a function of lateral acceleration, accounting for changing installation ratios, nonlinear spring rates (springs in series, in...
  3. hutch325

    Kingpin Inclination, Caster, etc. for McPherson strut

    A tangential offshoot from another recently-started thread. I'm doing some kinematics analysis on a front suspension with that's McP strut with the L-shaped control arm (i.e., not a two-link with a virtual steering axis). Scrub radius is near zero from the factory. I'm investigating the...
  4. hutch325

    Geometry Analysis - Measurements

    Does anyone have any thoughts regarding how accurately the locations of the suspension pivots need to be measured for input to a kinematics analysis program to yield useful output? This is on a production car, I'm neglecting compliance for right now, and I have all the parts off the car and...
  5. hutch325

    Modeling hysteretic elements when specifying dampers

    Okay, time for a long post. I am looking for advice on simulating some suspension elements. I currently have a quarter-car model in Simulink (MATLAB) that I am using as a tool to specify damper characteristics for a BMW using stiffer springs than stock (along with some Excel-based calcs for...

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