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Technical Paper

Magneto-Optic Tachometers for Automotive Vehicles' Chassis

2002-07-09
2002-01-2227
Anti-lock braking systems (ABS) are an accident evasion system (AES) that by incorporating relevant sensory systems (SS), for instance, such as magneto-optic (M-O) tachometers, accelerometers etc., can avoid wheel locking during hard braking in an emergency, especially when the road surface is slippery. Automotive vehicles (AV) lose steering when the front wheels (FW) lock. An ABS uses sensors at each wheel to monitor deceleration when the fluidomechanic (F-M) or electromechanic (E-M) drum, ring or disc brakes are applied. If any of the wheels begin to lock, the ABS will modulate the brake pressure or voltage, thus ‘pumping’ the fluidomechanic (F-M) or electromechanic (E-M) drum, ring or disc brakes, respectively, at the rate faster than the average human driver (HD) could. This will allow the wheel to continue rotating so avoiding locking, and the wheel will remain to react to the steering wheel (SW).
Technical Paper

Advances and Challenges in BBW AWB Dispulsion for Future Automotive Vehicles

2001-10-01
2001-01-3321
Current implementation of novel advanced electromechanically (E-M) activated brake-by-wire (BBW) all-wheel-driveable (AWB) dispulsion mechatronic control hyposystems may be comparatively costly. Though, as the cost of macroelectronic commutator (macrocom-mutator) and microelectronic processor (microprocessor) based controllers becomes increasingly cheap, fixed with bettered short-stroke linear brake-force-actuator motors, novel advanced E-M-activated BBW AWB dispulsion mechatronic control hyposystems become a potential practical choice in the not-too-distant future. The size and mass of these short-stroke tubular linear DC-AC macrocommutator brake-force-actuator E-M motors may be comparatively small and light, respectively, in the nearest future with bettered interior permanent magnet (IPM) materials. Specific advantages of the novel advanced E-M-activated BBW AWB dispulsion mechatronic control hyposystem are cleanliness, lack of fluid and flexibility.
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