Acceptance test according to UIC 518 and CEN/TC 256 WG 10

Assessment quantities	Filtering cut-off freq	Method of calculation	Percentile
(∑Y)_2m lateral track-shift force	≥ 20 Hz	sliding mean 2m sampling interval 0.5m	F₁= 0.15% F₂= 99.85%
(Y/Q)_2m Y over Q ratio	≥ 20 Hz	sliding mean 2m sampling interval 0.5m	F₁= 0.15% F₂= 99.85%
Q Vertical contact force	20 Hz	-	F₂= 99.85%
Y_qst Lateral quasi-static wheel force	≥ 20 Hz	-	F₀= 50%
Q_qst Vertical quasi-static wheel force	≥ 20 Hz	-	F₀= 50%
ÿ_q^z¨_q^Lateral and vertical accelerations	.4-10Hz	-	F₁= 0.15% F₂= 99.85% r.m.s. values sÿ_q^* and sz¨_q^*
ÿ^*_qst Lateral quasi-static acceleration	≥ 20 Hz	-	F₀= 50%
∑Y Instability criterion	f₀=±2Hz	-	Sliding r.m.s. value