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1、Motorcycles - Measurement methods for moments of inertia Motocycles - M - measuring the angle B between the x-axis and the line drawn from the shoulder pivot to the H-point. 6 Position of motorcycle The roll angle of the motorcycle in relation to the platform shall be zero with a tolerance of + 0,5.
2、 7 Measuring procedure 7.1 Abbreviations and symbols The following abbreviations and symbols are used in 7.2, 7.3 and 7.4: RMP: MP : P : RM : M : 111 : T : i j : g : Rider/Motorcycle/Platform combination; Motorcycle/Platform combination; Platform; Rider/Motorcycle combination; Motorcycle; Mass, in k
3、ilograms; Period, in seconds; RMP, MP, P, as appropriate; RM, M, as appropriate; acceleration due to gravity, in metres per second squared. NOTE - Further symbols are explained in the respective figures. Copyright International Organization for Standardization Provided by IHS under license with ISO
4、Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/26/2007 20:37:29 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 9129 : 1999 (E) 7.2 Roll moment of inertia about x-axis The roll moment of inertia, I, in kilograms metre squared, about the x-axis may be
5、calculated from the following equation (see figure 1) : .)2 / /A/ /, aip1 )I 92 l i Z X .O Figure 3 - Measurement procedure for yaw moment of inertia (procedure with bifilar pendulum principle using platform) - Side view 8 Test results Test results shall be presented as indicated in the annex. 5 Cop
6、yright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/26/2007 20:37:29 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 9129 : 1966 (E) Annex Format for measurement r
7、esults The format shown in this annex shall be used to record the measurement results of moments of inertia for motorcycles, calculated in accordance with this International Standard. Motorcycle - Moments of inertia - Measurement results to IS0 9129 1 Vehicle identification 1.1 Make,model,type: 1.2
8、Year model: 1.3 Vehicle Descriptor Section (VDS) (see IS0 3779) : 1.4 Tyresize: front: /rear: 1 . 1.5 Tyrepressure: front: kPa/rear: kPa 1.6 Castor angle: . 1.7 Wheel-base: . mm 1.8 Handlebar identification : . 1.9 Description of handlebar position : . 1.10 Seat identification: 1.11 Suspension setti
9、ng (if adjustable) : . 2 Test conditions 2.1 Vehicle with/withoutt) dummy 2.2 Dummy reference (if applicable) 2.3 Height from the centre of the steering head pipe to the ground:21 . mm 2.4 Height from the centre of the rear suspension upper fixation bolt to the ground:2) . mm 2.5 Angle A (see 5.2; i
10、f applicable): 2.6 Angle B (see 5.2; if applicable): 3 Test results 3.1 (See 7.2 and figure 1) Roll moment of inertia about the x-axis of the rider/motorcycle combination, ZxrRM: kg.m2 Roll moment of inertia about the x-axis of the motorcycle, Z .rrp$: . kgvm2 3.2 (See 7.3 and figure 2) Pitch moment
11、 of inertia about they-axis of the rider/motorcycle combination, ZyyRM: . kg.m2 Pitch moment of inertia about the y-axis of the motorcycle, ZYy M : kg-m2 3.3 (See 7.4 and figure 3) Yaw moment of inertia about the z-axis of the rider/motorcycle combination, ZzrRM: kg-m2 Yaw moment of inertia about th
12、e z-axis of the motorcycle, ZrrM: . kgam2 1) Delete as applicable. 2) If 2.3. and 2.4 cannot be measured, describe a reference point at the front and at the rear of the vehicle, and indicate the distance from these points to the ground. UDC 629.118.6 : 631.231 Descriptors : road vehicles, motorcycle
13、s, tests, determination, moment of inertia. Price based on 6 pages Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/26/2007 20:37:29 MDTNo reproduction or networking permitted without license from IHS -,-,-