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1、SpincontrolforcarsStabilitycontrolsystemsarethelatestinastringoftechnologiesfocusingonimproveddirivingsafety.Suchsystemsdetecttheinitialphasesofaskidandrestoredirectionalcontrolin40milliseconds,seventimesfasterthanthereactiontimeoftheaveragehuman.Theycorrectvehiclepathsbyadjustingenginetorque
2、orapplyingtheleft-or-right-sidebrakes,orboth,asneeded.ThetechnologyhasalreadybeenappliedtotheMercedes-BenzS600coupe.Automaticstabilitysystemscandetecttheonsetofaskidandbringafishtailingvehiclebackoncourseevenbeforeitsdrivercanreact.Safetyglass,seatbelts,crumplezones,airbags,antilockbrakes,tra
3、ctioncontrol,andnowstabilitycontrol.Thecontinuingprogressionofsafetysystemsforcarshasyieldedyetanotherdevicedesignedtokeepoccupantsfrominjury.Stabilitycontrolsystemshelpdriversrecoverfromuncontrolledskidsincurves,thusavoidingspinoutsandaccidents.Usingcomputersandanarrayofsensors,astabilitycon
4、trolsystemdetectstheonsetofaskidandrestoresdirectionalcontrolmorequicklythanahumandrivercan.Everymicrosecond,thesystemtakesa"snapshot,"calculatingwhetheracarisgoingexactlyinthedirectionitisbeingsteered.Ifthereistheslightestdifferencebetweenwherethedriverissteeringandwherethevehicleisgoing,the
5、systemcorrectsitspathinasplit-secondbyadjustingenginetorqueand/orapplyingthecat'sleft-orright-sidebrakesasneeded.Typicalreactiontimeis40milliseconds-seventimesfasterthanthatoftheaveragehuman.Astabilitycontrolsystemsensesthedriver'sdesiredmotionfromthesteeringangle,theacceleratorpedalposition,
6、andthebrakepressurewhiledeterminingthevehicle'sactualmotionfromtheyawrate(vehiclerotationaboutitsverticalaxis)andlateralacceleration,explainedAntonvanZanten,projectleaderoftheRobertBoschengineeringteam.VanZanten'sgroupandateamofengineersfromMercedes-Benz,ledbyprojectmanagerArminMuller,develop
7、edthefirstfullyeffectivestabilitycontrolsystem,whichregulatesenginetorqueandwheelbrakepressuresusingtractioncontrolcomponentstominimizethedifferencebetweenthedesiredandactualmotion.Automotivesafetyexpertsbelievethatstabilitycontrolsystemswill
