| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 221 | Servo system including flow voting redundant failure correcting hydraulic actuator | US24332272 | 1972-04-12 | US3813990A | 1974-06-04 | COPPOLA P; SUNDERLAND L; WILDRICK M |
| A servo system including redundant, failure correcting hydraulic actuator is described which operates on the ''''flow voting'''' principle and contains circuitry for detecting and indicating failure in any of the servovalve channels which control the actuator. In a preferred embodiment of the invention, a plurality of servovalves, preferably three or more, control a single actuator cylinder. The servovalves are operated in parallel with identical input signals. In normal operation each servovalve allows an equal amount of fluid to flow to the actuator cylinder. In the event of a failure of any servovalve (or any component of the associated servo loop), the remaining servovalves, automatically compensate the flow so that the actuator is still capable of controlling the load. Detection, indication and deactivation of a failed servovalve is provided by continuously comparing the relative position of each servovalve. Whenever the position of one servovalve varies from the other valves by an amount in excess of a preset threshold value (i.e., an amount in excess of that due to normal variations in valve tolerances) a malfunction is present. The failure detection circuitry provides an indication of the failure and the channel containing the failed servovalve is simultaneously deactivated. In one form, the circuitry for deactivating the servovalve channel so that the actuator output remains basically unaffected in the event of a second failure.
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| 222 | Self monitoring control system utilizing an electrical model for each control means | US3724330D | 1971-07-12 | US3724330A | 1973-04-03 | MASON R |
| A control system having a plurality of control channels, each of which includes a servo control means having a valve which moves responsively to the application of control signals so as to control the flow of fluid from a source thereof to an output member connected for positioning a load. Electrical transducer means is connected to the control valve to produce an electrical signal which is characteristic of the servo control means. An electrical model which produces an output electrical signal which is characteristic of that signal desired for the servo control valve is provided. The output electrical signals are connected to a comparator for detecting disparity between the signals thus generated and then for providing an output signal which deactivates the particular servo control means wherein the failure has occurred which causes the disparity in the signals being compared.
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| 223 | Redundant hydraulic control system for actuators | US3702575D | 1971-06-01 | US3702575A | 1972-11-14 | CAMPBELL RICHARD A |
| A unique combination of three main valves to supply hydraulic pressure to a conduit pattern including four secondary valves for the assured operation of a hydraulic actuator. All the secondary valves are under the command of a comparator and logic controller which is capable of stopping the hydraulic flow from a valve that failed and allowing the hydraulic flow to continue with the other operative valves. The control system permits two single point failures and still allows operation with no degradation in performance.
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| 224 | Servocontrol for dual hydraulic systems | US3640185D | 1970-01-07 | US3640185A | 1972-02-08 | KORSAK KAZIMIERZ |
| An improved servocontrol for redundant hydraulic fluid systems employing dual pressure sources each operating a separate actuator simultaneously to perform a common function. Two servo valve devices are employed, with each including valve elements connected in both hydraulic systems, thereby providing parallel control circuits from each pressure source to its associated actuator. The two servo valve devices are operated in synchronism by an input assembly permitting independent operation of one servo valve device in the event of jamming of the other. The parallel circuits, controlled through separate, independently operably valves, eliminate the possibility of a hydraulic lock in one actuator preventing operation of the other.
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| 225 | Device for supervising electro-hydraulic actuators | US3618470D | 1970-06-10 | US3618470A | 1971-11-09 | MUELLER ALFRED; STEMMILDT HANS-JOACHIM; RENNER ECKHARD |
| A DUAL CYLINDER DRIVE WITH PISTONS OPERATING A COMMON OUTPUT ACTUATOR AND INDIVIDUAL FEEDBACK CONTROL IN FOLLOWER OPERTION AS TO AN ELECTRICAL INPUT. ANY PRESSURE DIFFERENTIAL BETWEEN THE CYLINDERS IS USED TO GENERATE A CONTROL OPERATION TENDING TO EQUALIZE THE PRESSURE FOR SIMILAR RELATIVE PISTON POSITIONS. IN CASE OF EXCESS PRESSURE DIFFERENCE, THE DRIVE IS SHUT DOWN.
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| 226 | Redundant control system for actuation of flight control surfaces | US3593620D | 1969-08-20 | US3593620A | 1971-07-20 | FOERSTER DAVE JOHN; MASON JAMES S |
| A redundant control system including a two-part housing, each part containing one or more output pistons extending into associated cylinders in the other part and two or more separate fluid circuits for actuating different pistons thus to physically isolate one system from another so that should a failure occur in one system it will not affect the other system. The porting to one or more of the cylinders is through the pistons associated therewith.
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| 227 | Control apparatus | US3580139D | 1969-04-03 | US3580139A | 1971-05-25 | RASMUSSEN ROBERT F |
| Conventionally, in aircraft having fluid operated servomotors for positioning the control surfaces, aircraft engine driven pumps supply the operating fluid pressures for the servomotors while the aircraft is in flight.
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| 228 | Indicating apparatus | US3529569D | 1967-11-08 | US3529569A | 1970-09-22 | STAHL WILLIAM F |
| 229 | Hydraulically operated servomechanisms | US3520230D | 1968-09-13 | US3520230A | 1970-07-14 | ORLOFF GEORGE |
| 230 | Dual redundant electrohydraulic servo system | US3494256D | 1968-07-01 | US3494256A | 1970-02-10 | BIOLETTI RUDY; KREHELY RICHARD M |
| 231 | Fluid power control system and components therefor | US3460575D | 1967-01-23 | US3460575A | 1969-08-12 | DUBROW ALVIN L |
| 232 | Hydraulic actuators | US3434387D | 1966-03-02 | US3434387A | 1969-03-25 | ELLIS STAFFORD M |
| 233 | Multiple channel servo systems | US3433125D | 1967-03-13 | US3433125A | 1969-03-18 | GEMMELL DOUGLAS B |
| 234 | Redundant actuator valving using parallel and serial connected valves | US50605865 | 1965-11-02 | US3411411A | 1968-11-19 | FLECK JOEL J; DAVID HOGAN |
| 235 | System for controlling hydraulic servomotors | US48270065 | 1965-08-26 | US3404605A | 1968-10-08 | KLAUS PFAFF |
| 236 | Hydraeric redundant control system having steady state failure detection capability | US51625265 | 1965-12-27 | US3385171A | 1968-05-28 | DEREK WOOD |
| 237 | Control device for two hydraulic power devices which are adapted for being coupled in parallel | US42607565 | 1965-01-18 | US3366014A | 1968-01-30 | RENE LUCIEN |
| 238 | Redundant actuator | US53276066 | 1966-03-08 | US3358565A | 1967-12-19 | TOWNSEND RICHARD E |
| 239 | Fluid motor actuators | US41403764 | 1964-11-25 | US3296936A | 1967-01-10 | WESS THOMAS B; KROC RICHARD A |
| 240 | Servo valve synchronizer | US49369765 | 1965-10-07 | US3272062A | 1966-09-13 | FLIPPO ROBERT V; HOLMES LLOYD H |
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