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4016results about "Controllers with particular characteristics" patented technology
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Surgical machine and method for controlling and/or regulating a surgical machine
ActiveUS7362062B2Guaranteed uptimeEasy to startElectronic commutation motor controlDC motor speed/torque controlMotor controllerControl theory
To improve a surgical machine with a sensorless electric motor comprising a rotor and at least two motor windings, and with a motor controller for controlling and / or regulating the electric motor, so that the electric motor is operable with optimum efficiency at low rotational speeds and a starting of the motor in accordance with the purpose, also under load, is enabled, it is proposed that a space vector pulse width modulation (SVPWM) method for controlling and / or regulating the electric motor, in which all motor windings are able to be simultaneously supplied with electric current, be performable with the motor controller. A method for controlling and / or regulating a surgical machine is also proposed.
Owner:AESCULAP AG
Low temperature electronic vaporization device and methods
ActiveUS20130042865A1Maintain efficiencyReduce the temperatureInput/output for user-computer interactionTobacco treatmentInhalationEnvironmental health
Low temperature electronic vaporization devices and method are described herein for emulating smoking wherein the devices generate an aerosol for inhalation by a subject by heating a viscous material that can have a tactile response in the mouth or respiratory tract.
Owner:JLI NAT SETTLEMENT TRUST
Low temperature electronic vaporization device and methods
InactiveUS20130312742A1Maintain efficiencyReduce the temperatureInput/output for user-computer interactionTobacco treatmentInhalationEnvironmental health
Low temperature electronic vaporization devices and method are described herein for emulating smoking wherein the devices generate an aerosol for inhalation by a subject by heating a viscous material that can have a tactile response in the mouth or respiratory tract.
Owner:JUUL LABS INC
Extended Active Disturbance Rejection Controller
ActiveUS20090005886A1Good conditionEasy to controlComputation using non-denominational number representationAnti-hunting elementsControl systemActive disturbance rejection control
Multiple designs, systems, methods and processes for controlling a system or plant using an extended active disturbance rejection control (ADRC) based controller are presented. The extended ADRC controller accepts sensor information from the plant. The sensor information is used in conjunction with an extended state observer in combination with a predictor that estimates and predicts the current state of the plant and a co-joined estimate of the system disturbances and system dynamics. The extended state observer estimates and predictions are used in conjunction with a control law that generates an input to the system based in part on the extended state observer estimates and predictions as well as a desired trajectory for the plant to follow.
Owner:CLEVELAND STATE UNIVERSITY
Method and/or apparatus for navigating mobile robot using virtual sensor
InactiveUS20050187678A1Reduce in quantityControllers with particular characteristicsSpecial data processing applicationsSimulationVirtual sensors
A method and apparatus of improving the navigation performance of robot are provided. The navigation method using a virtual sensor includes: generating information on positions of obstacles, the information which is estimated to be generated by virtual sensors that are virtually present, based on information on positions of the obstacles, which is generated by physical sensors; and controlling a movement of a robot according to the information on the positions of the obstacles. It is possible to overcome limits in the number and arrangement of previously installed physical sensors.
Owner:SAMSUNG ELECTRONICS CO LTD
Medical robotic system with sliding mode control
ActiveUS7453227B2Reduces stick-slip behaviorProgramme-controlled manipulatorComputer controlRobotic armControl system
A medical robotic system has a joint coupled to medical device or a slave manipulator or robotic arm adapted to hold and / or move the medical device for performing a medical procedure, and a control system for controlling movement of the joint according to user manipulation of a master manipulator. The control system includes at least one joint controller having a sliding mode control for reducing stick-slip behavior on its controlled joint during fine motions of the joint. The sliding mode control computes a distance to a sliding surface, computes a reaching law gain, and processes the distance and reaching law gain to generate a sliding mode control action that is in absolute value less that a maximum desired feedback control action. The sliding mode control action is then further processed to generate a feedback torque command for the joint motor.
Owner:INTUITIVE SURGICAL OPERATIONS INC
Adaptive sampling method for improved control in semiconductor manufacturing
InactiveUS6988017B2Sampled-variable control systemsSemiconductor/solid-state device testing/measurementControl engineeringProcess engineering
A method is provided, the method comprising sampling at least one parameter characteristic of processing performed on a workpiece in at least one processing step, and modeling the at least one characteristic parameter sampled using an adaptive sampling processing model, treating sampling as an integrated part of a dynamic control environment, varying the sampling based upon at least one of situational information, upstream events and requirements of run-to-run controllers. The method also comprises applying the adaptive sampling processing model to modify the processing performed in the at least one processing step.
Owner:ADVANCED MICRO DEVICES INC
Controller with configurable connections between data processing components
Owner:SIEMENS IND INC
Wireless Communication of Process Measurements
A method and device or monitoring parameters in a process reduces power consumption and bandwidth requirements in the transmission of the monitored parameter to for example, a monitoring application. In particular, new monitoring parameter values are only transmitted if the difference between a measured or calculated parameter value and the most recently transmitted value exceeds a limit, since the last communication of the parameter or if the time since the last communication of the parameter exceeds a preset refresh period. The determination as to whether to transmit the parameter can be applied to engineering unit values or raw values.
Owner:FISHER-ROSEMOUNT SYST INC
Medical robotic system with sliding mode control
ActiveUS20070138992A1Reduces stick-slip behaviorProgramme-controlled manipulatorComputer controlRobotic systemsRobotic arm
A medical robotic system has a joint coupled to medical device or a slave manipulator or robotic arm adapted to hold and / or move the medical device for performing a medical procedure, and a control system for controlling movement of the joint according to user manipulation of a master manipulator. The control system includes at least one joint controller having a sliding mode control for reducing stick-slip behavior on its controlled joint during fine motions of the joint. The sliding mode control computes a distance to a sliding surface, computes a reaching law gain, and processes the distance and reaching law gain to generate a sliding mode control action that is in absolute value less that a maximum desired feedback control action. The sliding mode control action is then further processed to generate a feedback torque command for the joint motor.
Owner:INTUITIVE SURGICAL OPERATIONS INC
State based adaptive feedback feedforward PID controller
InactiveUS7113834B2Simulator controlControllers with particular characteristicsSelf adaptiveComputer science
A state based adaptive PID controller includes a model set component including a plurality of process models, each process model including a plurality of parameters. An error generator generates a model error signal representative of a difference between a model output signal and a process output signal. A model evaluation component computes a model squared error based on the model error signal. A parameter interpolator calculates an adaptive parameter value based on the model squared error. A controller update component updates adaptive controller parameter values based on adaptive parameter values.
Owner:FISHER-ROSEMOUNT SYST INC
Robust process identification and auto-tuning control
InactiveUS20020111758A1Accurate estimateImprove performanceAmplifier modifications to reduce noise influenceVoltage-current phase angleGuidelineTime delays
A simple yet effective and robust identification method is presented using process step responses for process identification that can provide a continuous transfer function with time-delay without iteration. A cascade relay provides accurate and reliable more points on the process frequency response. The internal model principle is employed to design single-loop controller of PID or high-order types with best achievable control performance for controller tuning, e.g. both single and multivariable cases are covered. The process identification and control design portions can be easily integrated into a control system auto-tuning package. Further, a general control scheme for disturbance rejection is given which can significantly improve disturbance rejection performance over conventional feedback systems with time delays. Practical issues such as noises, real-time implementation and tuning guidelines are also provided. The present invention provide general, systematic, effective, and applicable methods for process identification and control for a wide range of industries such as process and chemical plants, food processing, waste water treatment and environmental systems, oil refinery, servo and mechatronic systems, where a system model is needed for analysis, prediction, filtering, optimization and management, and / or where control or better control is required for their systems.
Owner:NAT UNIV OF SINGAPORE
Door Operator for Controlling a Door and Method of Same
ActiveUS20090265992A1Minimize error signalDC motor speed/torque controlBuilding braking devicesRechargeable cellSpring force
A door operator for controlling operation of a door, the door operator having a motor to open the door against a spring force, the door operator further comprising a door position sensor for transmitting a signal indicative of door position; and among other things, calculates a door moment of inertia based on a net torque and the time for the door to reach a predetermined angle from the closed position. Also provided is a door operator that compares door speed to a desired door speed based on a door speed-position profile and generates a door speed error signal and minimizes the door speed error signal by adjusting the braking load resulting from charging a chargeable battery using the motor as a generator.
Owner:ASSA ABLOY ACCESSORIES & DOOR CONTROLS GRP INC
Pattern recognition adaptive controller
InactiveUS6937909B2Sampled-variable control systemsIgnition automatic controlNoise levelTime control
A pattern recognition adaptive controller configured to dynamically adjust proportional gain and integral time control parameters based upon patterns that characterize the closed-loop response. The pattern recognition adaptive controller receives a sampled signal representative of the controlled variable, and determines a smoothed signal based on the sampled signal. The controller determines an estimated noise level of the sampled signal and determines if the control output and process output are oscillating quickly based on predefined criteria. The controller adjusts the gain used by the controller if the control output and process output are oscillating quickly. If the control output and process are not oscillating quickly, the controller determines whether there has been a significant load disturbance, whether there is an insignificant pattern, and / or whether the control output is saturated. Based on the results of these determinations, the controller either leaves the gain and integral time unchanged or determines new gain and integral time. The adjusted control parameters are then used to control the actuator, thereby causing the controller to affect the process.
Owner:JOHNSON CONTROLS TECH CO
Robust process identification and auto-tuning control
InactiveUS6697767B2Accurate estimateImprove performanceAmplifier modifications to reduce noise influenceElectric testing/monitoringGuidelineControl system
This invention provides a novel process identification and control package for high performance. For process identification, a simple yet effective and robust identification method is presented using process step responses to give a continuous transfer function with time-delay without iteration. A new relay, called cascade relay, is devised to get more accurate and reliable points on the process frequency response. For controller tuning, the internal model principle is employed to design single-loop controller PID or high-order types with best achievable control performance. The process identification and control design parts can be easily integrated into control system auto-tuning package. Further, a general control scheme for disturbance rejection is given which can significantly improve disturbance rejection performance over conventional feedback systems with time delays. Practical issues such as noises, real-time implementation and tuning guidelines are also provided. The invention covers both open-loop and closed-loop testing, and single and multivariable cases.
Owner:NAT UNIV OF SINGAPORE
System and method for a mass flow controller
InactiveUS6962164B2Eliminates the effects of hysteresisFluid pressure measurementPipeline systemsHysteresisControl quality
A system and method for controlling a mass flow controller to have a constant control loop gain under a variety of different types of fluids and operating conditions, and for configuring the mass flow controller for operation with a fluid and / or operating conditions different from that used during a production of the mass flow controller. Further, the system and method includes providing control by reducing the effects of hysteresis in solenoid actuated devices by providing a non-operational signal to the solenoid actuated device.
Owner:BROOKS INSTRUMENT
Continuously Scheduled Model Parameter Based Adaptive Controller
InactiveUS20090319060A1Short adaptation timeReduce processSimulator controlComputation using non-denominational number representationOperating pointModel parameters
An adaptive process controller performs continuously scheduled process model parameter interpolation to determine a particular set of process model parameters which are used to develop controller tuning parameters for controller tuning. More particularly, a state-based, adaptive PID controller described herein uses a new technique to determine an appropriate process model to be used to perform adaptive tuning over the various operating regions of the plant, and in particular, uses a process model parameter determination technique that enables continuously scheduled process model parameter update over the various plant operating regions or points. The use of this continuously scheduled process model parameter update method provides for smoother transitions between tuning parameters used in the PID controller during adaptive tuning procedures which are implemented based on changes in the operating region or the operating point of the process, thereby providing for better overall control.
Owner:FISHER-ROSEMOUNT SYST INC
Adaptive sampling method for improved control in semiconductor manufacturing
InactiveUS20050221514A1Sampled-variable control systemsSemiconductor/solid-state device testing/measurementComputational scienceFeature parameter
A method is provided, the method comprising sampling at least one parameter characteristic of processing performed on a workpiece in at least one processing step, and modeling the at least one characteristic parameter sampled using an adaptive sampling processing model, treating sampling as an integrated part of a dynamic control environment, varying the sampling based upon at least one of situational information, upstream events and requirements of run-to-run controllers. The method also comprises applying the adaptive sampling processing model to modify the processing performed in the at least one processing step.
Owner:ADVANCED MICRO DEVICES INC
Mechanical automatic steering control method
InactiveCN101221447AHigh control precisionFlexibleGuiding agricultural machinesTarget-seeking controlAutomatic steeringPid control algorithm
The invention relates to a machinery automatic steering control method which comprises the following steps that: positional deviation and course deviation are determined; according to the variance in the practical front wheel rotating angle of an agricultural machine, online setting of PID parameter is completed by means of parameter self-setting PID control algorithm; moreover, the expected front wheel rotating angle of the next moment is calculated, thereby realizing automatic steering control of the agricultural machine. Based on conventional PID navigation control method, the invention makes full use of the fuzzy control method; according to the variance in the practical front wheel rotating angle of an agricultural machine, the invention meets the different requirements of the machine on PID control parameter under different errors and error change rate, thereby realizing online setting of PID parameter. The invention not only has the advantages of fuzzy control such as flexibility and adaptability, but also has the characteristics of higher precision of PID control; therefore, the invention can increase the stability and precision of agricultural machine automatic steering control and the robustness of a control system.
Owner:CHINA AGRI UNIV
Method of and device for controlling fuel for gas turbine
Values such as a pressure for supplying fuel gas to a gas turbine, a pressure in a combustor casing of the gas turbine, an output of a generator connected to the gas turbine, and a controlled output for a flow rate control valve are detected by sensors. The detected values are input into a control device. A differential pressure across the flow rate control valve and a target value of the differential pressure are also input into the control device. The control device performs a desired arithmetic operation based on these input values to output a lift instruction for a pressure control valve.
Owner:MITSUBISHI HITACHIPOWER SYST LTD
Run-to-run control method for proportional-integral-derivative (PID) controller tuning for rapid thermal processing (RTP)
InactiveUS20020107604A1Semiconductor/solid-state device testing/measurementSemiconductor/solid-state device manufacturingThermodynamicsFirst principle
A method is provided, the method comprising measuring at least one parameter characteristic of rapid thermal processing performed on a workpiece in a rapid thermal processing step, and modeling the at least one characteristic parameter measured using a first-principles radiation model. The method also comprises applying the first-principles radiation model to modify the rapid thermal processing performed in the rapid thermal processing step.
Owner:ADVANCED MICRO DEVICES INC
System and methods for registering a controlled web to a pitched unit operation
ActiveUS8244393B2Absorbent padsTesting/calibration of speed/acceleration/shock measurement devicesUnit operationWorld Wide Web
Owner:PROCTER & GAMBLE CO
Alternative energy system control method and apparatus
ActiveUS7117044B2Mechanical power/torque controlSampled-variable control systemsPower flowControl power
A multivariable control system provides regulation for a plurality of control variables of interest based on selecting a particular one of the variables for regulation relative to a corresponding setpoint, while continuing to monitor the other variables and switching regulation control over to another one of the variables as needed to maintain all of them within their allowed ranges. The system includes one or more PID regulators that tune themselves for the particular variables selected for regulation control. In an exemplary embodiment, the control system is configured for controlling an alternative energy system, wherein it includes one or more power flow devices that control power flow between electrical energy storage devices (EESDs) and a common dc bus and / or power flow between the dc bus and an external ac electrical system.
Owner:SQUARE D CO
Method and apparatus for determining calibration options in a motion control system
InactiveUS6850806B2Controllers with pulse-train output signalComputation using non-denominational number representationControl systemMovement control
In one embodiment, a method of and apparatus for determining calibration options in a motion control system is provided. The method includes the steps of measuring error in a commanded motion, modeling the error, identifying sources of the error; and predicting a degree to which applying compensation for one of the sources of the error might affect the error.
Owner:SIEMENS ENERGY & AUTOMATION INC
Integrally coupled power control system having a solid state relay
ActiveUS20060050464A1Non-enclosed substationsPLC for automation/industrial process controlElectricityControl system
A power control system includes a base having a housing configured for releasably receiving a control unit and a cavity within the housing for receiving a solid state relay having a hockey puck configuration. The base includes an input power terminal for coupling to an input power source, an output power terminal for coupling to a power receiving load, and coupling fixtures for fixedly and electrically coupling to input and output power terminals and control terminals of the received solid state relay. A control unit is configured to control the solid state relay for selectively providing, at least a portion of, the power received at the input power terminal to the output power terminal. The control unit has a housing adapted to be releasably coupled to the base housing. The control unit and base each configured to electrically couple the control unit to the control terminals of the received solid state relay as a function of the control unit being coupled to the base.
Owner:WATLOW ELECTRIC MFG
Heating, ventilation and air conditioning (HVAC) system and method using feedback linearization
InactiveUS7331191B2Mechanical apparatusTemperature control using digital meansMulti unitDependability
A new feedback linearization approach to advanced control of single-unit and multi-unit HVAC systems is described. In accordance with the approach of the invention, this new nonlinear control includes a model-based feedback linearization part to compensate for the nonlinearity in the system dynamics. Therefore, the evaporating temperature and superheat values can be controlled by linear PI control designs to achieve desired system performance and reliability. The main advantages of the new nonlinear control approach include (1) better performance even with large model errors, (2) being able to adapt to indoor unit turn on / off operation, (3) much smaller PI control gains compared to that of current feedback PI controls, (4) much easier design procedures since there is no need for tuning the PI control gains over wide range operation.
Owner:MASSACHUSETTS INST OF TECH
Heating, ventilation and air conditioning (HVAC) system and method using feedback linearization
InactiveUS7076962B2Mechanical apparatusTemperature control using digital meansMulti unitDependability
A new feedback linearization approach to advanced control of single-unit and multi-unit HVAC systems is described. In accordance with the approach of the invention, this new nonlinear control includes a model-based feedback linearization part to compensate for the nonlinearity in the system dynamics. Therefore, the evaporating temperature and superheat values can be controlled by linear PI control designs to achieve desired system performance and reliability. The main advantages of the new nonlinear control approach include (1) better performance even with large model errors, (2) being able to adapt to indoor unit turn on / off operation, (3) much smaller PI control gains compared to that of current feedback PI controls, (4) much easier design procedures since there is no need for tuning the PI control gains over wide range operation.
Owner:MASSACHUSETTS INST OF TECH
Adaptive controller for PC cooling fans
ActiveUS7138781B2Reduce complexity and costLow costSynchronous motors startersAC motor controlMicrocontrollerClosed loop
Owner:MICROCHIP TECH INC
Control apparatus, control method, and engine control unit
InactiveUS6925372B2Analogue computers for vehiclesElectrical controlDead timeExternal combustion engine
A control apparatus, a control method, and an engine control unit are provided for controlling an output of a controlled object which has a relatively large response delay and / or dead time to rapidly and accurately converge to a target value. When the output of the controlled object is chosen to be that of an air / fuel ratio sensor in an internal combustion engine, the output of the air / fuel ratio sensor can be controlled to rapidly and accurately converge to a target value even in an extremely light load operation mode.
Owner:HONDA MOTOR CO LTD
Door operator for controlling a door and method of same
ActiveUS8169169B2Minimize error signalDC motor speed/torque controlBuilding braking devicesRechargeable cellSpring force
Owner:ASSA ABLOY ACCESSORIES & DOOR CONTROLS GRP INC
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