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| Notation | Item |
|
| Mc | Mass of car body |
| Icx | Mass moment of inertia of car body roll |
| Icy | Mass moment of inertia of car body pitch |
| Icz | Mass moment of inertia of car body yaw |
| Mb | Mass of bogie |
| Ibx | Mass moment of inertia of bogie roll |
| Iby | Mass moment of inertia of bogie pitch |
| Ibz | Mass moment of inertia of bogie yaw |
| Mass of wheelset |
| Iwx | Mass moment of inertia of wheel roll |
| Iwy | Mass moment of inertia of wheel pitch |
| Iwz | Mass moment of inertia of wheel yaw |
| ksz | Vertical stiffness of secondary suspension |
| ksx | Longitudinal stiffness of secondary suspension |
| ksv | Lateral stiffness of secondary suspension |
| csz | Vertical damping of secondary suspension |
| csx | Longitudinal damping of secondary suspension |
| csv | Lateral damping of secondary suspension |
| kpz | Vertical stiffness of primary suspension |
| kpx | Longitudinal stiffness of primary suspension |
| kpv | Lateral stiffness of primary suspension |
| cpz | Vertical damping of primary suspension |
| cpx | Longitudinal damping of primary suspension |
| cpv | Lateral damping of primary suspension |
| hs | Vertical distance between center of gravity of car body and lateral secondary suspension system |
| hb | Vertical distance between lateral secondary suspension system and center of gravity of bogie |
| hp | Vertical distance between center of gravity of bogie and lateral primary suspension system |
| lc | Half-distance between two bogies of a vehicle |
| lt | Half-distance between wheelsets of a bogie |
| bs | Half of transverse distance between vertical secondary suspension systems |
| bp | Half of transverse distance between vertical primary suspension systems |
| V | Forward speed of vehicle |
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