Anti-skid brake control system
An anti-skid brake control system (9) for a wheeled vehicle has a conventional continuous source of pressurized hydraulic fluid, a hydraulically actuated wheel rotation braking device which responds via a wheel brake valve (11) to applied hydraulic pressure to apply a braking force to a wheel of the...
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| creator | PECZKOWSKI JOSEPH L SUH PETER J |
| description | An anti-skid brake control system (9) for a wheeled vehicle has a conventional continuous source of pressurized hydraulic fluid, a hydraulically actuated wheel rotation braking device which responds via a wheel brake valve (11) to applied hydraulic pressure to apply a braking force to a wheel of the vehicle, and an operator actuatable control (10, 12, 39) for varying the supply of hydraulic pressure to the wheel rotation braking device. The system is responsive directly to the operator actuatable control (10, 12, 39) for determining the deceleration (14) currently commanded by the operator and further dynamically determines a maximum permissible wheel deceleration (47) at a given time. The operator controlled supply of hydraulic pressure to the braking device is overridden in the event that the deceleration (14) currently commanded by the operator exceeds the maximum permissible wheel deceleration. Maximum permissible wheel deceleration is dynamically determined by measuring the angular velocity (13) of the wheel, calculating the angular deceleration (51) of the wheel from the measured angular velocity (13), determining a maximum angular deceleration value (47) based on the measured angular velocity (13), determining the difference (53) between the calculated angular deceleration and the determined maximum angular deceleration, and modifying the determined maximum angular deceleration by a fraction of the determined difference (55) only if the determined maximum angular deceleration (47) is greater than the calculated angular deceleration (51). The braking force of the vehicle is controlled totally by the operator up to the point of an impending skid. |
| format | Patent |
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The system is responsive directly to the operator actuatable control (10, 12, 39) for determining the deceleration (14) currently commanded by the operator and further dynamically determines a maximum permissible wheel deceleration (47) at a given time. The operator controlled supply of hydraulic pressure to the braking device is overridden in the event that the deceleration (14) currently commanded by the operator exceeds the maximum permissible wheel deceleration. Maximum permissible wheel deceleration is dynamically determined by measuring the angular velocity (13) of the wheel, calculating the angular deceleration (51) of the wheel from the measured angular velocity (13), determining a maximum angular deceleration value (47) based on the measured angular velocity (13), determining the difference (53) between the calculated angular deceleration and the determined maximum angular deceleration, and modifying the determined maximum angular deceleration by a fraction of the determined difference (55) only if the determined maximum angular deceleration (47) is greater than the calculated angular deceleration (51). The braking force of the vehicle is controlled totally by the operator up to the point of an impending skid.</description><edition>5</edition><language>eng</language><subject>AEROPLANES ; AIRCRAFT ; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL ; AVIATION ; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL ; COSMONAUTICS ; HELICOPTERS ; PERFORMING OPERATIONS ; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OFVEHICLES ; TRANSPORTING ; VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF ; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES ; VEHICLES IN GENERAL</subject><creationdate>1994</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19940802&DB=EPODOC&CC=US&NR=5333942A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,777,882,25545,76296</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19940802&DB=EPODOC&CC=US&NR=5333942A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>PECZKOWSKI; JOSEPH L</creatorcontrib><creatorcontrib>SUH; PETER J</creatorcontrib><title>Anti-skid brake control system</title><description>An anti-skid brake control system (9) for a wheeled vehicle has a conventional continuous source of pressurized hydraulic fluid, a hydraulically actuated wheel rotation braking device which responds via a wheel brake valve (11) to applied hydraulic pressure to apply a braking force to a wheel of the vehicle, and an operator actuatable control (10, 12, 39) for varying the supply of hydraulic pressure to the wheel rotation braking device. The system is responsive directly to the operator actuatable control (10, 12, 39) for determining the deceleration (14) currently commanded by the operator and further dynamically determines a maximum permissible wheel deceleration (47) at a given time. The operator controlled supply of hydraulic pressure to the braking device is overridden in the event that the deceleration (14) currently commanded by the operator exceeds the maximum permissible wheel deceleration. Maximum permissible wheel deceleration is dynamically determined by measuring the angular velocity (13) of the wheel, calculating the angular deceleration (51) of the wheel from the measured angular velocity (13), determining a maximum angular deceleration value (47) based on the measured angular velocity (13), determining the difference (53) between the calculated angular deceleration and the determined maximum angular deceleration, and modifying the determined maximum angular deceleration by a fraction of the determined difference (55) only if the determined maximum angular deceleration (47) is greater than the calculated angular deceleration (51). 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The system is responsive directly to the operator actuatable control (10, 12, 39) for determining the deceleration (14) currently commanded by the operator and further dynamically determines a maximum permissible wheel deceleration (47) at a given time. The operator controlled supply of hydraulic pressure to the braking device is overridden in the event that the deceleration (14) currently commanded by the operator exceeds the maximum permissible wheel deceleration. Maximum permissible wheel deceleration is dynamically determined by measuring the angular velocity (13) of the wheel, calculating the angular deceleration (51) of the wheel from the measured angular velocity (13), determining a maximum angular deceleration value (47) based on the measured angular velocity (13), determining the difference (53) between the calculated angular deceleration and the determined maximum angular deceleration, and modifying the determined maximum angular deceleration by a fraction of the determined difference (55) only if the determined maximum angular deceleration (47) is greater than the calculated angular deceleration (51). The braking force of the vehicle is controlled totally by the operator up to the point of an impending skid.</abstract><edition>5</edition><oa>free_for_read</oa></addata></record> |
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| language | eng |
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| subjects | AEROPLANES AIRCRAFT ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL AVIATION BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL COSMONAUTICS HELICOPTERS PERFORMING OPERATIONS PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OFVEHICLES TRANSPORTING VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES VEHICLES IN GENERAL |
| title | Anti-skid brake control system |
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