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1914results about "Power driven steering" patented technology
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Recovery of calibrated center steering position after loss of battery power
ActiveUS7295907B2Accurate absolute steering angleAvoid the needDigital data processing detailsOptical signallingElectric power steeringSteering angle
The steering angle of a vehicle is monitored using position sensors of an electric motor of an electric power assisted steering (EPAS) system. A position of the electric motor corresponding to the straight-ahead, center position of the steering system is stored in non-volatile memory during a steering calibration procedure, such as an end-of-line calibration in a vehicle assembly plant. Following power loss due to a dead battery, a steering angle zeroing procedure performed in a vehicle stability control (VSC) system generates a center position with enough accuracy to be within one electrical cycle of the motor. The pre-stored electric motor position is then used to determine the electrical cycle where the center position was located, and accurate monitoring of steering angle is resumed.
Owner:TRW AUTOMOTIVE US LLC
Detecting driver grip on steering wheel
ActiveUS8909428B1High measurement accuracyImprove accuracySteering initiationsDigital data processing detailsElectricityDriver/operator
Aspects of the disclosure relate generally to determining by what degree a driver is gripping a steering wheel. In one example, a computer may send an electrically assisted power steering system (EPS) motor an excitation command to move. The EPS motor may respond by moving a flexible coupling between the steering wheel and the EPS motor. This may cause a corresponding movement at the steering wheel. A torque sensor may generate pattern data by monitoring the flexible coupling during the movement. The EPS motor may generate system position data for the entire steering system, for example, from the tires to the steering wheel. The pattern data and the system position data may be compared by the computer to determine the degree of grip. In this regard, the computer may determine the degree of a driver's grip without the need for additional sensors.
Owner:WAYMO LLC
Vehicle control system
ActiveUS20060015231A1Reduce vehicle weightSimple designVehicle fittingsDigital data processing detailsControl systemActuator
A vehicle control system which can ensure high reliability, real-time processing, and expandability with a simplified ECU configuration and a low cost by backing up an error through coordination in the entire system without increasing a degree of redundancy of individual controllers beyond the least necessary level. The vehicle control system comprises a sensor controller for taking in sensor signals indicating a status variable of a vehicle and an operation amount applied from a driver, a command controller for generating a control target value based on the sensor signals taken in by the sensor controller, and an actuator controller for receiving the control target value from the command controller and operating an actuator to control the vehicle, those three controller being interconnected via a network. The actuator controller includes a control target value generating unit for generating a control target value based on the sensor signals taken in by the sensor controller and received by the actuator controller via the network when the control target value generated by the command controller is abnormal, and controls the actuator in accordance with the control target value generated by the control target value generating unit.
Owner:HITACHI ASTEMO LTD
Directing vehicle into feasible region for autonomous and semi-autonomous parking
A method of guiding a vehicle to a region for initiating a parallel parking maneuver. A region of feasible starting locations for successfully performing a parallel parking maneuver is determined by a processor. A position of the vehicle relative to the region of feasible starting locations is determined. A determination is made whether the vehicle is in a zero heading position. The vehicle is guided along an initial target path by controlling a steering actuator until the vehicle is in a zero heading position relative to the road of travel in response to the vehicle is not in the zero heading position. A planned path is generated that includes two arc-shaped trajectories extending between the vehicle at the zero heading position and a position within the region of feasible starting locations as determined by the processor. The steering actuator is controlled to follow the planned path to the feasible region.
Owner:GM GLOBAL TECH OPERATIONS LLC
Vehicle-trailer backing up system using active front steer
InactiveUS20060103511A1Digital data processing detailsSteering initiationsSteering wheelSteering angle
A vehicle-trailer back-up control system that employs an active front steer sub-system. The system includes a smart hitch controller that receives a vehicle speed signal and a hand-wheel angle signal, and calculates a hitch angle command signal. The system further includes a hitch angle sensor that measures the hitch angle between the vehicle and the trailer that is compared to the hitch angle command signal to generate a hitch angle error signal. A PID control unit receives the hitch angle error signal, and generates a corrected road wheel angle signal based on proportional and derivative gains. The corrected road wheel angle signal is used to generate a motor angle signal that is applied to a steering actuator to be combined with the steering angle signal to generate the front wheel steering signal during a back-up maneuver.
Owner:GM GLOBAL TECH OPERATIONS LLC
Rotational-angle detection device and electric power-steering device provided with rotational-angle detection device
ActiveUS20140336878A1Reduce detectionImprove securityDigital data processing detailsAutomatic steering controlElectric power steeringPower flow
When a shaft misalignment detection part detects occurrence of a shaft misalignment that is a misalignment in a relative position in a radial direction of a rotary shaft between a magnet part and a sensor part, the shaft misalignment detection part outputs a shaft misalignment determination flag to a correction part and a control change instruction part. The correction part calculates a motor rotational angle so as to reduce a detection error caused by the shaft misalignment. The control change instruction part outputs instructions of changing calculation methods so that influence by the detection error decreases to an assist torque setting part and an assist current instruction part.
Owner:TOYOTA JIDOSHA KK
Vehicle-trailer backing up system using active front steer
Owner:GM GLOBAL TECH OPERATIONS LLC
Automotive lane deviation prevention apparatus
ActiveUS20050125153A1Improve securityVehicle fittingsDigital data processing detailsRoad surfaceControl unit
An automotive lane deviation prevention (LDP) apparatus includes a control unit detecting whether a host vehicle is in a specific state where the host vehicle is traveling on road-surface irregularities formed on or close to a lane marking line. The control unit actively decelerates the host vehicle when the host vehicle is in the specific state where the host vehicle is traveling on the road-surface irregularities.
Owner:NISSAN MOTOR CO LTD
Control apparatus for multi-phase rotary machine and electric power steering system
ActiveUS20110074333A1Smooth rideInhibition effectCommutation monitoringDC motor speed/torque controlBrake torqueElectric power steering
A control apparatus for a multi-phase rotary machine includes a control unit and a plurality of power supply systems including respective inverter units. When a short-circuiting failure occurs in one of the systems due to an ON-failure in any one of FETs in an inverter unit of the failure system, the control unit stops driving of the rotary machine by bringing all the FETs in the failure system into the OFF state. The control unit controls FETs of the non-failure system such that a brake torque generated in the failure system is cancelled or the influence of the brake torque exerted on the driving of the motor is reduced.
Owner:DENSO CORP
Apparatus and method for administration of IV liquid medication and IV flush solutions
InactiveUS6953450B2Reduce the number of stepsShorten the timeDiaphragm valvesYielding couplingInterconnectionBuccal administration
The present invention provides a medical liquid administration apparatus and administration method that are particularly apt for intravenous (IV) applications. More particularly, the administration apparatus and method may be employed in conjunction with the administration of liquid medication and one or more flush solutions from multi-dose sources, wherein fluid interconnections between at least one flush solution source and the administration apparatus may be established a single time at the outset of a given procedure. The administration apparatus may include a valve having a control member selectively positionable to provide any selected one of a plurality of closed flow paths through the valve, and a syringe interconnected to the control member for clockwise / counterclockwise co-rotation therewith (e.g. to establish the selected flow path).
Owner:BAXTER ENGLEWOOD
Modular dual wheel drive assembly, wheeled devices that include modular dual wheel drive assemblies and methods for moving and/or maneuvering wheeled devices using modular dual wheel drive assemblies
ActiveUS20070080000A1Improved load weight distributionHubsSteering linkagesRotational axisDrive wheel
A wheel assembly for a small-scale machine includes a pair of opposing, individually-driven wheels, associated motors and possibly one or more gear assemblies. The motors receive separate drive signals from a control electronics subsystem of the wheel assembly. The motors can be connected to the wheels via the gear assemblies. Because the wheels are separately driven, driving the two wheel assemblies at similar or different speeds drives the wheel assembly over straight or curved paths. An orientation assembly allows the orientation of the wheels to the machine to be controllably altered. A height adjusting assembly allows the distance between the wheels and a point on the machine where the wheel assembly is attached to be adjusted. The rotational axis that the wheel assembly rotates about when re-oriented need not pass through either wheel of the wheel assembly. The wheels can be driven by control signals generated by on-board control electronics.
Owner:CYCOGS
Device for controlling vehicle turn behavior with discrimination of drive direction
InactiveUS6324458B1Vehicle body stabilisationDigital data processing detailsControl theoryBraking system
A device for controlling a turn running behavior of a vehicle detects at least one parameter (V, gamma, Gy, Gyh, gammat, gammat-gamma) with respect to the turn running behavior in addition to a drive direction of the vehicle, the one parameter being indicative of a higher desirability of the turn running behavior control according to changes of a magnitude thereof, calculates an amount (DELTATer, Froq, Friq, DELTATes, Fsop, Fsiq, Fsoq) for the turn running behavior control based upon the detected turn running behavior parameters, determines a start of the turn running behavior control according to the one turn running behavior parameter traversing a threshold value (Vrp, Vrq, gammarp, gammarq, Gyp, Gyq, Gyhp, Gyhq, Vsp, Vsq, gammasp, gammasq, gammatsp, gammatsq, DELTAgammap, DELTAgammaq) determined therefor, and executes the turn running behavior control by operating at least one of the engine and the brake system according to the turn running behavior control amount, wherein threshold value is changed in a rearward drive of the vehicle as compared in a forward drive thereof such that the turn running behavior control is started at a lower degree of the desirability thereof in the rearward drive than in the forward drive.
Owner:TOYOTA JIDOSHA KK
Control apparatus for electric power steering apparatus
InactiveUS20090192679A1Steering initiationsDigital data processing detailsElectric power steeringMotor drive
The present invention provides a control apparatus for an electric power steering apparatus comprises: a steering assist command value calculating section; a current control section that calculates a voltage command value; and a motor driving section that drives a motor based on the voltage command value, wherein an assist power from the motor is applied to a steering system, the control apparatus is characterized in that an SAT measuring section, that inputs an angular speed and an angular acceleration of the motor, the steering assist command value and the torque signal therein so as to estimate an SAT, is provided, and the SAT obtained by the SAT measuring section is feedbacked to the steering assist command value via a feedback section composed of a phase compensating section and a gain section.
Owner:NSK LTD
High bandwidth rotary servo valves
InactiveUS20060096644A1Pressure relieving devices on sealing facesValve members for absorbing fluid energyHigh bandwidthEngineering
A valve includes a rotating, substantially pressure-balanced spool that selectively aligns openings within the spool with openings within a sleeve to selectively connect ports of a manifold for gas or liquid routing. A valve may also include a stem, a needle coupled to the stem. a seat configured to receive the needle, a reservoir, an outlet coupled to the reservoir, and a servo motor coupled to the stem. The servo motor rotates the stem to raise or lower the needle relative to the seat to variably restrict or allow matter flowing from the reservoir to the outlet.
Owner:VANDERBILT UNIV
Vehicle control system
ActiveUS7630807B2Reduce vehicle weightSimple designVehicle fittingsDigital data processing detailsControl systemActuator
Owner:HITACHI ASTEMO LTD
Control device for electric power steering apparatus
InactiveUS20080201041A1Reliable compensationPhase differenceTemperatue controlSingle motor speed/torque controlElectric power steeringControl vector
A control device for an electric power steering apparatus includes a control unit which controls a motor giving steering assist force to a steering system according to a current command value computed based on steering toque and vehicle speed in a vector control manner and an advance angle map for compensating for a phase lag occurring in a motor current relative to the current command value. Advance angle compensation is made for the current command value based on the advance angle map.
Owner:NSK LTD
Collision avoidance device
ActiveUS20100030426A1Accurate judgmentPreventing wasteful collision avoidance controlDigital data processing detailsAnti-collision systemsWhite lineSteering control
A collision avoidance ECU estimates a traveling locus based on an estimated curve radius of an own vehicle in a basic traveling locus estimating unit, and in a changed traveling locus estimating unit, obtains separation distances between an own vehicle and white lines based on the relative positional relationship between an own vehicle and the white lines, and estimates, as a changed traveling locus, a route along the white lines with the obtained separation distances maintained. In a collision judging unit, when auto-steering control and departure warning control are not performed, collision judgment is performed based on the basic traveling locus estimated in the basic traveling locus estimating unit, and when the auto-steering control and departure warning control are performed, the traveling locus is changed to the changed traveling locus estimated in the changed traveling locus estimating unit and collision judgment is performed.
Owner:TOYOTA JIDOSHA KK
Control system and method for hybrid vehicle
InactiveUS20100006360A1Avoid forceHigh voltagePlural diverse prime-mover propulsion mountingPropulsion by batteries/cellsElectric power steeringLow voltage
The present invention is to provide a control system for a hybrid vehicle in which, even if during traveling of the hybrid vehicle, a battery defect arises in a high-voltage power source, battery-less emergency traveling can be achieved over a sufficiently long distance, and the steering assist force can be effectively prevented from changing rapidly during traveling. The control section includes high-voltage power source defect processing unit. During execution of a mode in which the high-voltage power source, is reduced so that the reduced voltage is supplied to an electric power steering device (EPS), when a defect occurs in the high-voltage power source, the high-voltage power source defect processing unit shifts to a mode in which the low voltage of a low-voltage power source is increased so that the increased voltage is supplied to the EPS. The high-voltage power source defect processing unit then disconnects the high-voltage power source and the driving circuit from each other. Thereafter, the control section shifts to a mode in which a voltage corresponding to power generated by a generator is reduced so that the reduced voltage is supplied to the EPS, while allowing the generator to drive a traveling motor.
Owner:TOYOTA JIDOSHA KK
Method and apparatus for controlling electric power steering system
ActiveUS20090234538A1Efficient implementationSingle motor speed/torque controlDigital data processing detailsElectric power steeringControl vector
Disclosed herein is a method for controlling an electric power steering system, wherein a motor is controlled by vector control and driven by a current command value calculated on the basis of a parameter such as a steering torque to provide a steering assist power to a vehicle steering system, and further wherein the current command value is limited on the basis of desired output characteristics and a desired angular speed during a field-weakening control and a non-field-weakening control of the vector control.
Owner:NSK LTD
Electric power steering device
ActiveUS20110156629A1Reduce the driving forceMotor/generator/converter stoppersDC motor speed/torque controlElectric power steeringElectric power system
An electric power steering device includes: an electric power source for supplying first current; a controller for setting a current instruction value; multiple electric power converters for converting the first current to second current corresponding to the current instruction value; multiple pairs of windings for generating a driving force of a motor; and a failure detection element for detecting failure of the electric power converters and the windings. The controller reduces the current instruction value to be equal to or smaller than a predetermined instruction value of a normal operation when the failure detection element detects the failure. The controller controls the electric power converter in a normal state to supply the second current to a corresponding winding.
Owner:DENSO CORP
Vehicle driving operation support apparatus/process and cooperation control
ActiveUS20100222960A1Reduce riskSufficient supportVehicle testingVehicle seatsDriver/operatorVehicle behavior
A vehicle driving operation support apparatus for a vehicle, includes a sensing section to sense a traveling condition of the vehicle including a surrounding condition inclusive of an obstacle around the vehicle; and a control section to calculate a risk potential for the vehicle in accordance with the traveling condition. The control section performs a support control to support the driver in accordance with the risk potential, performs a first assist control to restrain disturbance (such as vibration from a road) transmitted to the driver in accordance with the risk potential, and performs a second assist control to produce inducement simulating a condition change (such as a vehicle behavior) attributable to an increase of the risk potential, in accordance with the risk potential. The control section further performs a cooperation control to coordinate the first assist control and the second assist control.
Owner:NISSAN MOTOR CO LTD
Motor control device, current control method applied to motor control device, and electric power steering device using motor control device
ActiveUS20130200827A1Low costSufficient output torqueMotor/generator/converter stoppersCommutation monitoringElectric power steeringPower flow
Provided is a motor control device (10) for controlling a motor (5) provided with a plurality of sets of windings, in which, when a current control unit (23) detects a short-circuit failure as a primary failure, the current control unit (23) continues the control, and, further, when the current control unit (23) detects a secondary failure, the current control unit (23) provides control of opening a power supply relay (3). Accordingly, in a case where a failure of a winding of a motor or an inverter occurs, a torque pulsation is restrained and a sufficient output torque is provided, and further, in a case where a secondary failure occurs, excessive heat generation and current consumption are prevented and the cost of the device is reduced.
Owner:MITSUBISHI ELECTRIC CORP
Crop attribute map input for vehicle guidance
ActiveUS7725233B2Accurate valueSegregation can be facilitatedAnalogue computers for trafficRoad vehicles traffic controlAnimal ForagingMission plan
A method for dividing a field into zones with similar crop attributes and developing a mission plan for steering the harvester to selectively harvest crops based on one or more of the attributes. The attributes include protein level, starch level, oil level, sugar content, moisture level, digestible nutrient level, or any other crop characteristic of interest. The method can be applied to selectively harvest and / or segregate according to attribute any crop, including grains such as wheat, corn, or beans, fruits such as grapes, and forage crops. Directed crop sampling provides absolute value and variance information for segregated batches of harvested crop.
Owner:DEERE & CO
Method for controlling an electric motor to reduce EMI
InactiveUS7202622B2Reduce the amount requiredLow costDC motor speed/torque controlSynchronous motors startersPhase advanceDC-BUS
A method for reducing EMI emissions in the control of an electric motor supplied by a switching inverter fed by a DC bus comprising controlling a phase advance of a conduction angle period during which a phase of the motor is fed power by the inverter to control the conduction angle to control the speed of the motor, thereby to reduce the number of switching operations of the inverter and thereby reduce EMI.
Owner:INFINEON TECH AMERICAS CORP
Active container
A multi-functional active container (e.g., luggage or suitcase) with a plurality of sensors and actuators is described. The container may include a body defining an enclosure and having at least one opening. The container may include a processor, a wireless receiver, and an electronically controllable lock. The processor can selectively lock or unlock the electronically controllable lock based on signals received via a wireless receiver (e.g., via Wi-Fi or BLUETOOTH connections). In some examples, a distance between the active container and a remote device (e.g., a smart phone) can be determined (e.g., based on relative GPS signals or connection strength) and if the distance exceeds a threshold, the electronically controllable lock can be activated to secure the container. Further, the container may include a rechargeable power source for powering external devices and an integrated weight sensor for detecting the weight of the container.
Owner:TRAVELPRO BSI INC
Wire control steering automobile road sensing simulation executing device
InactiveCN102320324ASimple mechanical structureQuick responsePower driven steeringSteering wheelSnubber
The invention provides a wire control steering automobile road sensing simulation executing device, which comprises a support mechanism, a magnetorheological damping device, a pair of torsional springs and a torsional spring following element, wherein the magnetorheological damping device is arranged on the support mechanism, damping device shafts of the magnetorheological damping device are connected with a steering wheel shaft of a steering wheel in an automobile, the pair of torsional springs are respectively arranged on the damping device shafts arranged at both sides of the torsional spring following element, the pair of torsional springs are in coaxial installation and have opposite torsion directions, one end of each torsion spring is fixed on the support mechanism, the other end of the torsion spring is connected with the torsional spring following element, and the torsional spring following element and the damping device shafts are in a circumferential position limiting state. When the wire control steering automobile road sensing simulation executing device is adopted, the structure is simple, the energy consumption is low, in addition, the safety is high, and an active return function is realized.
Owner:NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
Motor driving device, electric power steering device using the same and method for detecting failure in the same
ActiveUS20110156626A1Commutation monitoringDigital data processing detailsPower inverterElectric power steering
A voltage application unit applies voltage to windings of a motor without passing though an inverter unit. A first detection unit detects a short circuit failure in switching elements of the inverter unit based on a terminal voltage between each of the switching elements and a corresponding winding and a power voltage of a power supply. Before rotation of the motor, when no short circuit failure is detected and when a switching unit switches at least one of the high and low potential-side switching elements of the inverter unit on and subsequently switches all the switching elements off, a second failure detection unit determines whether the switching unit is incapable of rendering the switching element non-conductive based on the terminal voltage and the power voltage.
Owner:DENSO CORP
Modular chassis with simplified body-attachment interface
InactiveUS7441615B2Simple interfaceEliminateAuxillary drivesVehicle seatsControl signalComputer module
A chassis having systems responsive to a nonmechanical control signals and a simplified body-attachment interface includes preassembled modules to enhance ease and simplicity of chassis assembly. The chassis is preferably configured to minimize the possibility of a preassembled module being incorrectly positioned within the chassis. Methods for advantageously employing preassembled modules to assemble vehicle chassis are also provided.
Owner:GM GLOBAL TECH OPERATIONS LLC
Device and method for controlling an automatic steering system of a vehicle, and device and method for checking the ability to implement a predefined setpoint travel direction variable for a vehicle
ActiveUS20110144865A1Improve robustnessLow costSteering initiationsDigital data processing detailsAutomatic steeringControl unit
A device for controlling an automatic steering system of a vehicle includes a signal input (which receives a setpoint travel direction variable, a memory device on which a correction factor is stored, a control unit which ascertains a corrected setpoint travel direction variable on the basis of the correction factor and the predefined setpoint travel direction variable, and an evaluation device which compares an actual travel direction variable ascertained by a sensor of the vehicle to the predefined setpoint travel direction variable, and if the actual travel direction variable deviates from the predefined setpoint travel direction variable by at least a minimum difference, redefines the correction factor according to the comparison.
Owner:ROBERT BOSCH GMBH
Crop attribute map input for vehicle guidance
ActiveUS20070089390A1Accurate valueSegregation can be facilitatedAnalogue computers for trafficRoad vehicles traffic controlAnimal ForagingMission plan
A method for dividing a field into zones with similar crop attributes and developing a mission plan for steering the harvester to selectively harvest crops based on one or more of the attributes. The attributes include protein level, starch level, oil level, sugar content, moisture level, digestible nutrient level, or any other crop characteristic of interest. The method can be applied to selectively harvest and / or segregate according to attribute any crop, including grains such as wheat, corn, or beans, fruits such as grapes, and forage crops. Directed crop sampling provides absolute value and variance information for segregated batches of harvested crop.
Owner:DEERE & CO
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