Table 1.
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The parameters of TLATS.

SymbolDescriptionValue/UnitSymbolDescriptionValue/Unit
|${m}_1$|TLTV sprung mass1.3 × 104 kg|${c}_l$|Nosewheel damping coefficient800 N·s·m−1
|${m}_2$|Nose landing gear sprung mass400 kg|${k}_{lf}$|Nose TLTV tire stiffness coefficient4 × 106 N·m−1
|${m}_3$|Airport sprung mass6.0 × 104 kg|${c}_{lf}$|Nose TLTV tire damping coefficient1000 N·s·m−1
|${m}_4$|Rear-landing gear sprung mass2000 kg|${k}_{lr}$|Rear TLTV tire stiffness coefficient5 × 106 N·m−1
|${L}_1$|Distance from TLTV CG (Center of Gravity) to aircraft nose wheel2 m|${c}_{lr}$|Rear TLTV tire damping coefficient1000 N·s·m−1
|${L}_2$|Distance from TLTV rear axle to aircraft nose wheel1.5 m|${k}_{2f}$|Nose landing gear stiffness coefficient2 × 105 N·m−1
|${L}_3$|Distance between nosewheel and aircraft CG15m|${c}_{2f}$|Nose landing gear damping coefficient10 000 N·s·m−1
|${L}_4$|Distance between rear-wheel and aircraft CG1 m|${k}_{2r}$|Rear-landing gear stiffness coefficient1 × 106 N·m−1
|${L}_f$|Distance between TLTV nose wheel and CG0.5 m|${c}_{2r}$|Rear-landing gear damping coefficient40 000 N·s·m−1
|${L}_r$|Distance between TLTV rear wheel and CG3.5 m|${J}_1$|Pitch-plant moment of inertia of the TLTV body5.4 × 104 kg·m2
|${k}_l$|Nosewheel stiffness coefficient2 × 106 N·m−1|${J}_2$|Pitch-plant moment of inertia of the aircraft4.7 × 106 kg·m2
SymbolDescriptionValue/UnitSymbolDescriptionValue/Unit
|${m}_1$|TLTV sprung mass1.3 × 104 kg|${c}_l$|Nosewheel damping coefficient800 N·s·m−1
|${m}_2$|Nose landing gear sprung mass400 kg|${k}_{lf}$|Nose TLTV tire stiffness coefficient4 × 106 N·m−1
|${m}_3$|Airport sprung mass6.0 × 104 kg|${c}_{lf}$|Nose TLTV tire damping coefficient1000 N·s·m−1
|${m}_4$|Rear-landing gear sprung mass2000 kg|${k}_{lr}$|Rear TLTV tire stiffness coefficient5 × 106 N·m−1
|${L}_1$|Distance from TLTV CG (Center of Gravity) to aircraft nose wheel2 m|${c}_{lr}$|Rear TLTV tire damping coefficient1000 N·s·m−1
|${L}_2$|Distance from TLTV rear axle to aircraft nose wheel1.5 m|${k}_{2f}$|Nose landing gear stiffness coefficient2 × 105 N·m−1
|${L}_3$|Distance between nosewheel and aircraft CG15m|${c}_{2f}$|Nose landing gear damping coefficient10 000 N·s·m−1
|${L}_4$|Distance between rear-wheel and aircraft CG1 m|${k}_{2r}$|Rear-landing gear stiffness coefficient1 × 106 N·m−1
|${L}_f$|Distance between TLTV nose wheel and CG0.5 m|${c}_{2r}$|Rear-landing gear damping coefficient40 000 N·s·m−1
|${L}_r$|Distance between TLTV rear wheel and CG3.5 m|${J}_1$|Pitch-plant moment of inertia of the TLTV body5.4 × 104 kg·m2
|${k}_l$|Nosewheel stiffness coefficient2 × 106 N·m−1|${J}_2$|Pitch-plant moment of inertia of the aircraft4.7 × 106 kg·m2
Table 1.
Open in new tab

The parameters of TLATS.

SymbolDescriptionValue/UnitSymbolDescriptionValue/Unit
|${m}_1$|TLTV sprung mass1.3 × 104 kg|${c}_l$|Nosewheel damping coefficient800 N·s·m−1
|${m}_2$|Nose landing gear sprung mass400 kg|${k}_{lf}$|Nose TLTV tire stiffness coefficient4 × 106 N·m−1
|${m}_3$|Airport sprung mass6.0 × 104 kg|${c}_{lf}$|Nose TLTV tire damping coefficient1000 N·s·m−1
|${m}_4$|Rear-landing gear sprung mass2000 kg|${k}_{lr}$|Rear TLTV tire stiffness coefficient5 × 106 N·m−1
|${L}_1$|Distance from TLTV CG (Center of Gravity) to aircraft nose wheel2 m|${c}_{lr}$|Rear TLTV tire damping coefficient1000 N·s·m−1
|${L}_2$|Distance from TLTV rear axle to aircraft nose wheel1.5 m|${k}_{2f}$|Nose landing gear stiffness coefficient2 × 105 N·m−1
|${L}_3$|Distance between nosewheel and aircraft CG15m|${c}_{2f}$|Nose landing gear damping coefficient10 000 N·s·m−1
|${L}_4$|Distance between rear-wheel and aircraft CG1 m|${k}_{2r}$|Rear-landing gear stiffness coefficient1 × 106 N·m−1
|${L}_f$|Distance between TLTV nose wheel and CG0.5 m|${c}_{2r}$|Rear-landing gear damping coefficient40 000 N·s·m−1
|${L}_r$|Distance between TLTV rear wheel and CG3.5 m|${J}_1$|Pitch-plant moment of inertia of the TLTV body5.4 × 104 kg·m2
|${k}_l$|Nosewheel stiffness coefficient2 × 106 N·m−1|${J}_2$|Pitch-plant moment of inertia of the aircraft4.7 × 106 kg·m2
SymbolDescriptionValue/UnitSymbolDescriptionValue/Unit
|${m}_1$|TLTV sprung mass1.3 × 104 kg|${c}_l$|Nosewheel damping coefficient800 N·s·m−1
|${m}_2$|Nose landing gear sprung mass400 kg|${k}_{lf}$|Nose TLTV tire stiffness coefficient4 × 106 N·m−1
|${m}_3$|Airport sprung mass6.0 × 104 kg|${c}_{lf}$|Nose TLTV tire damping coefficient1000 N·s·m−1
|${m}_4$|Rear-landing gear sprung mass2000 kg|${k}_{lr}$|Rear TLTV tire stiffness coefficient5 × 106 N·m−1
|${L}_1$|Distance from TLTV CG (Center of Gravity) to aircraft nose wheel2 m|${c}_{lr}$|Rear TLTV tire damping coefficient1000 N·s·m−1
|${L}_2$|Distance from TLTV rear axle to aircraft nose wheel1.5 m|${k}_{2f}$|Nose landing gear stiffness coefficient2 × 105 N·m−1
|${L}_3$|Distance between nosewheel and aircraft CG15m|${c}_{2f}$|Nose landing gear damping coefficient10 000 N·s·m−1
|${L}_4$|Distance between rear-wheel and aircraft CG1 m|${k}_{2r}$|Rear-landing gear stiffness coefficient1 × 106 N·m−1
|${L}_f$|Distance between TLTV nose wheel and CG0.5 m|${c}_{2r}$|Rear-landing gear damping coefficient40 000 N·s·m−1
|${L}_r$|Distance between TLTV rear wheel and CG3.5 m|${J}_1$|Pitch-plant moment of inertia of the TLTV body5.4 × 104 kg·m2
|${k}_l$|Nosewheel stiffness coefficient2 × 106 N·m−1|${J}_2$|Pitch-plant moment of inertia of the aircraft4.7 × 106 kg·m2
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