RoaDyn S635. Force. Wheel force transducer for heavy cars and high performance vehicles. Type 9267A1

Transcription

1 Force RoaDyn S635 Wheel force transducer for heavy cars and hih performance vehicles For measurin three forces and three moments on a rotatin wheel; a major constituent in modern vehicle development. Modular desin with replaceable measurin cells and components CAD/FEM supported desin: optimization of local stresses Hih strenth/low WFT weiht in combination with hih riidity Excellent sinal quality due to diitization already in the wheel electronics Automatic identification of components by ID chip Calibration of the individual load cells as well as of the WFT assembly Tested structural fatiue strenth e.. to SAEJ328 Description The RoaDyn S635 wheel force transducer (WFT) has a modular, versatile desin for mountin on hubs and rim eometries. Five 3-component strain ae load cells are connected by adapter parts to a rim and to the vehicle hub. The sinals are amplified immediately in the load cells and fed via short cables to the wheel electronics. Here they are filtered, diitized and coded. The data stream is transmitted via a rotor/stator pair to the wheel inner side, transformed in the on-board electronic unit and output to a data acquisition device. Additional sinals on the rotatin wheel, such as tire pressure, temperature, etc. can be directly connected to the wheel electronics and transmitted alon with the wheel sinals. Kistler offers optional amplifier modules for this purpose. The wheel electronics is available in versions with channels. Note: see data sheets 5240A_ , 5248A_ and for the transmission units and the on-board electronics. This WFT is desined for exceptionally hih forces and moments associated with heavy cars and hih-performance vehicles. Because of often lare wheel offsets, the load on the wheels is particularly hih, specially with reard to moments. The anticipated stresses are determined usin the FE method, and the desin optimized with reard to strenth, safety and weiht. Dynamic cornerin fatiue investiations make it possible to validate the life of the WFT structure. Kistler Group products are protected by several intellectual property rihts patents. For more details see: Pae 1/5

2 Application Measurin operatin loads durin typical vehicle drivin maneuvers Input data for the desin of new components Verification of desin loads Measurin test stand control data for road simulators (Permanent) application as multi-axle force measurin unit in road simulators Development of active chassis control systems such as ABS, ESP, etc. Investiations of vehicle behavior in specific or critical drivin situations Input data for fatiue calculations and numeric simulations Development of computer models Usually 4 or 2 WFTs are used. Occasionally measurements with a sinle WFT are also employed for component or tire development. The various test vehicles require adaptation to new wheel/hub eo-metries. The modular desin of the WFTs and proficient support by Kistler application centers has proved successful for this purpose. At the same time as the WFTs, systems for wheel motion measurement or optical sensors (such as for measurin tire and body slip anle, speed or accelerations) can also be used. Adaptations for applyin individual sensors to the measurin wheels are available in the Kistler product rane. The WFT system described above can also be used on a vehicle test stand. Its daily exclusive use on a test stand requires, amon other thins, special technical characteristics, which have led to the development of a special system. Further information is contained in the data sheet 9248A2_ Technical Data Measurin rane 1) F x 2) kn F y kn F z 2) kn M x kn m M y M z kn m kn m Rotary anle accuracy 0,1 Weiht WFT 3) m k 16,5 Maximum Loads Deree of protection Operatin temperature rane aluminum components IP64 C <160 Max. speed km/h >300 Max. impact accelerations Accuracy x y z Linearity % FS 0,5 Typical 4) % FS 0,15 Hysteresis % FS 0,5 Typical 4) % FS 0,10 Crosstalk forces % FS 0,5 Typical 4) % FS 0,10 Permitted alternatin stress (rotatin bendin fatiue test) The requirements accordin to SAE J328 are exceeded LC at 6.0 kn m 1) It is assumed that these extreme values do not occur simultaneously. The moments refer to the wheel center. 2) In combination with outer part 9731A53Q1 and load cells 9190A8D7: 40 kn 3) With 6x16" aluminum rim, rotor, wheel electronics, hub adapter, but without ET adapter, wheel bolts and tires 4) The typical accuracy corresponds to the median of the results of end-ofline and e-calibrations Pae 2/5

3 A Wheel bolt Rim Outer part Load cell Inner part Centerin tube Connector carrier Wheel bolt Fi. 1: RoaDyn S635 structure/components with in-board transmission Wheel electronics Electronics connector carrier Holdin rin Load cell screws Outer part Inner part Load cell screws Centerin tube Rim Load cells Pair of insulation Insulation discs disc Radiation shield Stator Rin antenna (rotor) Stator holder Lyo h Lyi LCrad Threads for fixin connector carrier and wheel electronics Center plane of wheel A Center plane of load cells Section A -- A Fi. 2: Expandability of the RoaDyn S6 WFT system. The wheel force transducer can be adapted for hiher load limits or a test stand by expandin the wheel force system with exchaneable measurin cells and mechanical adaptations Pae 3/5

4 RoaDyn S635 Measurin Chain Confiurations Wheel Force Transducer Data Transmission Connection Cable On-board Electronics with wheel electronics Type 5241A2 and rim Type Z39913A... Type 5240A, 5242A In-board transmission unit consistin of rotor and stator Type 30430A... Connection between stator and on-board electronics Type 9817A.. KiRoad Performance Type KiCenter Wheel Force Transducer Data Transmission Connection Cable On-board Electronics with wheel electronics Type 5241A2 and rim Type Z39913A... Type 5240A Out-board transmission unit Type 30430A... Connection between stator and on-board electronics Type 9817A.. KiRoad Performance Type KiCenter Mountin Kistler offers weiht and strenth optimized mechanical structural parts to adapt to the customer's vehicles. Mountin the Stator with In-Board Transmission With in-board transmission, a suitable mountin device is mounted on the wheel carrier or suspension strut for the stator. The position of the stator and the location of the support is then established with a aue. With the stator installed, mountin a WFT is comparable with that of a production wheel. The stator can also remain mounted on the vehicle if this is runnin on production wheels. When the WFTs are remounted, measurements can be made aain immediately. With out-board transmission, a support arm must additionally be included in the vehicle setup, to which the cable to the on-board electronics is fixed. Pae 4/5

5 System components 3-component strain ae load cells, completely encapsulated, 5 per wheel alternatively: 3-component strain ae load cells, completely encapsulated, 5 per wheel Internal part, 1 per wheel Connector holder for wheel electronics, 1 per wheel Outer part, 1 per WFT Rim, 1 per WFT Rin antenna (rotor), 1 per WFT Wheel electronics, 1 per WFT Hub adapter packae, containin heat-insulation disks, centerin sleeve and wheel bolts Wheel offset adapter, 1 per wheel KiRoad Performance Type/art. no. 9190A A A5 Z A5... Z39913A A5 5241A A3 9713A A... Optional accessories Type/art. no. Precision spirit level, Z per measurin system Adjuster ae for stator mountin, Z39911Q 1 per system Tire mountin tool, Z per measurin system Key for centerin sleeve Type Z39901, Z per measurin system 3-channel strain ae bride amplifier 2237A1 (SGAM) 3-channel thermocouple amplifier (TCAM) 2237A2 Orderin code RoaDyn S635 Wheel force transducer (WFT) for heavy cars and hih-performance vehicles Pae 5/5