The paper describes an overall approach for determining tilt control system performance. Firstly the issues relating to dynamic performance are reviewed, then some trade-off graphs are given, based upon the P_(CT) index approach which is now accepted as a European Standard. These graphs inter-relate vehicle speed, the maximum tilt angle, and the cant deficiency compensation factor, and help to determine the optimum operational conditions for a tilting train. Secondly a method for quantifying the dynamic performance is explained, in particular aimed at a comprehensive assessment of different tilt control laws. Simulation results are included to illustrate the method, and some preliminary conclusions regarding different controllers are presented.
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