Influence of freeplay and friction in steering system on double lane change manoeuvre
Abstract: Sensitivity and simulation investigations of a car dynamics model with regard to freeplay (backlash in steering gear) and friction (friction with stiction in king-pins) is a subject of the paper. The studies deal with a problem of sensitivity of optimized manoeuvres (here double lane change manoeuvres). A criterion function refers to several evaluations (precision of manoeuvre, calm steering, feeling of comfortable travel). The optimization of input steering signal (steering wheel angle) is done on a reference model with „nominal” freeplay and friction parameters. His input signal is applied to a „real” vehicle having „real” freeplay and friction parameters. The differences of output signals as well as differences between criterion function values are a subject of sensitivity analysis. For modelling and simulation of freeplay / friction effects special piecewise-linear luz(…) and tar(…) projections have been used.
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