The three main requirements of a vehicle-trailer connection system are: en routestability, over- or under-steering restraint, minimum off-tracking along curved path. Linkingthe two units by four-bar trapeziums, wider stability margins may be attained in comparisonwith the conventional pintle-hitch for both instability types, divergent or oscillating. Thestability maps are traced applying the Hurwitz method or the direct analysis of thecharacteristic equation at the instability threshold. Several types of four-bar linkages may bequickly tested, with the drawbars converging towards the trailer or the towing unit. The latterconfiguration appears preferable in terms of self-stability and may yield high critical speeds byoptimising the geometrical and physical properties. Nevertheless, the system stability may beimproved in general by additional vibration dampers in parallel with the connection linkage.Moreover, the four-bar connection may produce significant corrections of the under-steering orover-steering behaviour of the vehicle-train after a steering command from the driver. The offtrackingalong the curved paths may be also optimized or kept inside prefixed margins ofacceptableness. Activating electronic stability systems if necessary, fair results are obtainablefor both the steering conduct and the off-tracking.
|Numero di pagine||12|
|Rivista||JOURNAL OF PHYSICS. CONFERENCE SERIES|
|Stato di pubblicazione||Published - 2016|