850 results about "Control error" patented technology

An MPC adaptation and tuning technique integrates feedback control performance better than methods commonly used today in MPC type controllers, resulting in an MPC adaptation / tuning technique that performs better than traditional MPC techniques in the presence of process model mismatch. The MPC controller performance is enhanced by adding a controller adaptation / tuning unit to an MPC controller, which adaptation / tuning unit implements an optimization routine to determine the best or most optimal set of controller design and / or tuning parameters to use within the MPC controller during on-line process control in the presence of a specific amount of model mismatch or a range of model mismatch. The adaptation / tuning unit determines one or more MPC controller tuning and design parameters, including for example, an MPC form, penalty factors for either or both of an MPC controller and an observer and a controller model for use in the MPC controller, based on a previously determined process model and either a known or an expected process model mismatch or process model mismatch range. A closed loop adaptation cycle may be implemented by performing an autocorrelation analysis on the prediction error or the control error to determine when significant process model mismatch exists or to determine an increase or a decrease in process model mismatch over time.

A method for controlling errors in a wireless link layer using a simultaneous multiple copy scheme and an adaptive forward error correction (FEC) scheme in a wideband wireless communication is provided. The method for controlling errors in a link layer in wideband wireless communication using an automatic repeat request (ARQ) scheme, in which a wideband wireless channel is used for communication between a first node and a second node, includes the steps of (a) estimating the error ratio of a forward (a direction in which a cell is transmitted from the first node to the second node) channel using the state of a backward (a direction in which a cell is transmitted from the second node to the first node) channel, and transmitting a cell, in which a forward error correction (FEC) code having an encoding ratio that varies depending on the estimated error ratio is included in a protocol data unit (PDU) of a wireless link layer, through the forward channel and (b) re-transmitting the copy of a cell transmitted in the step (a), when feedback information that indicates that an error exists in the cell transmitted in the step (a) is received through the backward channel. It is possible to reduce the number of times of re-transmission by improving the probability of correcting forward errors using more error controlling bits as the state of the channel is worse and to minimize the waste of resources using less error controlling bits as the state of the channel is better, to thus obtain the optimal performance and guarantee the minimum delay time.

An MPC adaptation and tuning technique integrates feedback control performance better than methods commonly used today in MPC type controllers, resulting in an MPC adaptation / tuning technique that performs better than traditional MPC techniques in the presence of process model mismatch. The MPC controller performance is enhanced by adding a controller adaptation / tuning unit to an MPC controller, which adaptation / tuning unit implements an optimization routine to determine the best or most optimal set of controller design and / or tuning parameters to use within the MPC controller during on-line process control in the presence of a specific amount of model mismatch or a range of model mismatch. The adaptation / tuning unit determines one or more MPC controller tuning and design parameters, including for example, an MPC form, penalty factors for either or both of an MPC controller and an observer and a controller model for use in the MPC controller, based on a previously determined process model and either a known or an expected process model mismatch or process model mismatch range. A closed loop adaptation cycle may be implemented by performing an autocorrelation analysis on the prediction error or the control error to determine when significant process model mismatch exists or to determine an increase or a decrease in process model mismatch over time.

According to one embodiment, a control device that controls operation of a system includes a first selecting module, a second selecting module, a control error measuring module, a determining module, and a control module. The first selecting module selects a first neural network from neural networks different in network configuration from each other. The second selecting module selects a second neural network different from the first neural network from the neural networks. The control error measuring module measures first control error in control by the first neural network and second control error in control by the second neural network. The determining module compares the first control error and the second control error measured by the control error measuring module, and determines a neural network with less control error. The control module controls the operation of the system by the neural network with less control error determined by the determining module.

The present invention provides for a method and apparatus for correction of overlay control errors. Semiconductor devices are processed based upon control input parameters. The processed semiconductor devices are examined in a review station. The control input parameters are modified in response to the examination of the processed semiconductor devices. New control input parameters are implemented for a subsequent run of the semiconductor device processing step based upon the modification of the control input parameters.

Techniques for improving the performance of a quantum processor are described. Some techniques employ improving the processor topology through design and fabrication, reducing intrinsic / control errors, reducing thermally-assisted errors and methods of encoding problems in the quantum processor for error correction.

An MPC controller technique integrates feedback control performance better than methods commonly used today in MPC type controllers, resulting in an MPC controller that performs better than traditional MPC techniques in the presence of process model mismatch. In particular, MPC controller performance is enhanced by adding a tunable integration block to the MPC controller that develops an integral component indicative of the prediction or other control error, and adds this component to the output of an MPC controller algorithm to provide for faster or better control in the presence of model mismatch, which is the ultimate reason for the prediction error in the first place. This technique enables the MPC controller to react more quickly and to provide better set point change and load disturbance performance in the presence of model mismatch, without decreasing the robustness of the MPC controller.

An MPC controller technique integrates feedback control performance better than methods commonly used today in MPC type controllers, resulting in an MPC controller that performs better than traditional MPC techniques in the presence of process model mismatch. In particular, MPC controller performance is enhanced by adding a tunable integration block to the MPC controller that develops an integral component indicative of the prediction or other control error, and adds this component to the output of an MPC controller algorithm to provide for faster or better control in the presence of model mismatch, which is the ultimate reason for the prediction error in the first place. This technique enables the MPC controller to react more quickly and to provide better set point change and load disturbance performance in the presence of model mismatch, without decreasing the robustness of the MPC controller.

A method for controlling operation of a wind turbine is described. The wind turbine includes a rotor having a plurality of rotor blades and an upwind wind condition measurement device. The method includes measuring a wind condition upwind from the rotor using the upwind wind condition measurement device and providing the measured wind condition to a processor. The method also includes determining a control algorithm parameter, based at least partially on the measured wind condition, that controls at least one of a wind turbine response bandwidth, a wind turbine response speed, and a wind turbine control error range. The method also includes determining a wind turbine operating command based at least partially on the control algorithm parameter and applying the wind turbine operating command to operation of the wind turbine.

The invention relates to a space borne TDICCD camera integral timing and adjusting method, which comprises the following steps: (1) the orbit is simulated with high precision in which positions parameters of photographed spots of the satellite under drift angle control or at different swinging angles are outputted such as vector coordinates and oblique distances of the photographed spots as well as vector simulation data for the satellite position; (2) the vector simulation data for the satellite position are analyzed to come out with the shift speeds of the photographed spots; (3) eliminate the radial-directional speeds from the shift speeds of the photographed spots to become the image motion speeds; (4) utilize the image motion speeds and the oblique distances of the photographed spots to obtain the integral times. The invention also provides a design method for TDICCD related parameters as well as a real-time adjusting method for integral times on the satellite under control of ground commands. The space borne TDICCD camera integral timing and adjusting method realizes an organic combination of simulation modeling with high precision and positional vector differential method, which eliminates errors introduced into the deduction process in traditional geometric analysis and calculation and controls error delivery to improve calculation precision; the arrival real-time adjusting method for integral times on the satellite ensures a reliable integral synchronous control.

A non-volatile memory chip having SLC blocks acting as a write cache for MLC blocks for high density storage requires constant copying or folding of SLC blocks into MLC blocks. To avoid the time-consuming toggling out and in of the pages of the entire SLC block for ECC checking by a controller chip, only a small sample is checked. An optimal read point for reading the memory cells in the sample of the SLC block is dynamically determined by trying different read points so that the data is read within an error budget. Once the optimal read point is determined, it is used to read the entire SLC block without further error checking. Then the SLC block can be copied (blind folded) to the MLC block with the confidence of being within the error budget.

The invention provides a household appliance control method, a cloud system, a family gateway general control device and a household appliance controller. The household appliance control method, the cloud system, the family gateway general control device and the household appliance controller are used for solving the problems that in the management control technology of the existing household appliances are complex in implementation and installment process, poor in appliance compatibility, and high in control error rate and implementation cost. The family appliance control method comprises the steps that the cloud system ensures that a user logins and initiates an operating command used for controlling a controlled appliance; a control message is generated according to the operating command and a control protocol of the controlled appliance; the control message is sent to the family gateway general control device which the controlled appliance belongs to so as to ensure that the family gateway general control device analyzes the control message according to the downloaded and stored control protocol of the controlled appliance, and control signaling is acquired, is sent to the household appliance controller of the controlled appliance, and is sent to the controlled appliance by the household appliance controller of the controlled appliance. According to the technical scheme, the household appliance control method, the cloud system, the family gateway general control device and the household appliance controller are easy and convenient to install, accurate to control and operate, good in compatibility and low in cost, and improve the popularization and application of intelligent home furnishings.

The invention discloses an arm support state control system, which comprises a detection device (1), a storage device (2), a control device (3) and an actuating device (4), wherein the detection device (1) is used for detecting the position state and vibration state of an arm support (8) of concrete pumping equipment to obtain a position state signal and a vibration signal; the storage device (2) is used for storing the vibration signal to obtain the periodical vibration signal of the arm support (8); the control device (3) is used for receiving the position state signal, the vibration signal and the periodical vibration signal and obtaining a control instruction according to a preset arm support vibration range, a preset advanced regulation time and a preset control policy; and the actuating device (4) is used for changing the state according to the control instruction and controlling the arm support (8) to act the preset arm support vibration range. The arm support state control system provided by the invention can avoid control error caused by time delay in the detection process of the detection device and the actuating process of the actuating device, absorb vibration in time and improve the operation convenience of the arm support. The invention also discloses concrete pumping equipment.

A circuit and method are disclosed for reducing soft errors in dynamic memory devices using error checking and correcting. In an exemplary embodiment, a memory device includes a dual port memory having a first port for externally-initiated memory access operations and a second port for handling memory access operations associated with error checking and error correction operations. An error module, coupled to the second port of the dual port memory, performs an error checking operation on words read from the dual port memory. An error controller, coupled to the error module, controls the error module to perform error check operations on each word sequentially read from the dual port memory through the second port thereof. The error checking is performed substantially in parallel with externally-initiated memory access operations performed using the first port of the dual port memory. The error module may also generate a corrected word for a word that is detected by the error module as having a correctable error. The error controller may replace in the dual port memory the word having the correctable error with the corrected word.

The invention provides a cooperative control method and system of a battery energy storage power source participating in secondary frequency modulation of a power grid. The cooperative control method comprises the steps of: mounting the battery energy storage power source in a regional power grid needing the cooperation; obtaining an ACE (Area Control Error) signal from an electric grid control center by a cooperative control module; participating in the secondary frequency modulation of the power grid by the battery energy storage power source, and then dividing a typical application scene to determine the chance and participating degree of participation in the frequency modulation; converting a theoretical frequency modulation command into a practical frequency modulation command, then realizing charge / discharge control of the battery energy storage power source through an energy conversion system, and accordingly helping a traditional frequency modulation power source to finish a secondary frequency modulation process. The transient and steady performances of the secondary frequency modulation of the power grid are improved obviously, the frequent start of the traditional frequency modulation machine set is reduced, and balance between supply and demand of the power grid is maintained rapidly.

Techniques for improving the performance of a quantum processor are described. Some techniques employ reducing intrinsic / control errors by using quantum processor-wide problems specifically crafted to reveal errors so that corrections may be applied. Corrections may be applied to physical qubits, logical qubits, and couplers so that problems may be solved using quantum processors with greater accuracy.

In the event that the differential value of the target node deviation is equal to or greater than a deviation threshold, and the absolute value of the steering torque is equal to or greater than a steering torque threshold, the system outputs signals to a brake control device such that deceleration of the vehicle is made with a predetermined deceleration, and outputs signals to an electric power steering control device so as to cancel automatic steering, whereby the system enters a normal power steering mode, and the automatic driving mode is canceled. Thus, abnormal situations are precisely detected during automatic driving, giving consideration to the control error and the intent of the user, thereby enabling driving control matching the intent of the user.

A roll control system is provided for controlling a roll position of a boom rotatably coupled to a support frame, the boom comprising left and right wing sections (where the roll of the boom refers to a clockwise or counterclockwise rotation of said boom relative to the support frame). A roll control mechanism is configured for rotating the boom relative to the support frame in response to a roll control signal. Wing section position measuring apparatus is configured for producing a right wing signal correlatable to a distance between the right wing section and a right wing reference position and a left wing signal correlatable to a distance between the left wing section and a left wing reference position. Boom roll position measuring apparatus is configured for producing a boom roll signal correlatable to a roll position of the boom relative to a boom roll reference position. A controller is configured for: (i) identifying a wing section differential value and a boom roll value derived from the right and left wing signals and the boom roll signal, respectively; (ii) identifying a boom roll control error value derived from the wing section differential value and the boom roll value, the boom roll error control value being configured for deriving therefrom the roll control signal. Advantageously, the roll control system of the invention takes into account both the height differential (relative to a ground reference) between the left and right wings and the boom roll position relative to a neutral (reference) position.

A circuit and method are disclosed for reducing soft errors in dynamic memory devices using error checking and correcting. In an exemplary embodiment, a memory device includes a dual port memory having a first port for externally-initiated memory access operations and a second port for handling memory access operations associated with error checking and error correction operations. An error module, coupled to the second port of the dual port memory, performs an error checking operation on words read from the dual port memory. An error controller, coupled to the error module, controls the error module to perform error check operations on each word sequentially read from the dual port memory through the second port thereof. The error checking is performed substantially in parallel with externally-initiated memory access operations performed using the first port of the dual port memory. The error module may also generate a corrected word for a word that is detected by the error module as having a correctable error. The error controller may replace in the dual port memory the word having the correctable error with the corrected word.

A method for controlling operation of a wind turbine is described. The wind turbine includes a rotor having a plurality of rotor blades and an upwind wind condition measurement device. The method includes measuring a wind condition upwind from the rotor using the upwind wind condition measurement device and providing the measured wind condition to a processor. The method also includes determining a control algorithm parameter, based at least partially on the measured wind condition, that controls at least one of a wind turbine response bandwidth, a wind turbine response speed, and a wind turbine control error range. The method also includes determining a wind turbine operating command based at least partially on the control algorithm parameter and applying the wind turbine operating command to operation of the wind turbine.

The invention provides a celestial autonomous navigation method based on star sensors, which comprises the following steps: calculating attitude information based on a geocentric inertial coordinate system, which is output by a star sensor; calculating the optical axis direction based on the geocentric inertial coordinate system; converting the optical axis direction based on the geocentric inertial coordinate system into optical axis direction based on a WGS84 coordinate system; reading the included angles alpha 0 and beta 0 between the X and Y directions of the star sensor and the horizontal direction from a laser level meter; calculating the direction in the WGS84 coordinate system when the optical axis direction is perpendicular to the horizontal level; calculating the longitude alpha and latitude beta of the underground point S of the carrier; and outputting the attitude q and the longitude alpha and latitude beta of the underground point of the carrier in the geocentric inertial coordinate system. The invention avoids measurement and control errors caused by horizontal reference platforms, enhances the measuring accuracy, and simultaneously outputs the attitude of three axes and the longitude and latitude of the carrier in the geographic coordinate system in real time, thereby completely realizing celestial autonomous navigation.

In the case of a trimming method for a PLL circuit operating based on the principle of a two-point modulation, the PLL circuit is locked without any modulation being impressed and then an analog and a digital modulation signal are impressed into the locked PLL circuit. A signal that is characteristic of the PLL control error is tapped from the PLL circuit, and the modulation swing in the analog modulation signal is changed such that the characteristic signal has the same value as before the analog and digital modulation signals were impressed.

The invention relates to the field of electric power systems, and particularly to a diversified energy automatic generation control method considering wind power acceptance. The method comprises the following steps: classifying units according to different AGC adjustment performances and unit types, and dividing load changing tendencies (rising / declining / stable) by combining with a load prediction result; calculating an area control error ACE of a current region, and defining a zone (dead zone / help zone / secondary emergency zone / emergency zone) which the area control error ACE of the current region belongs to; and adopting different ACG adjustment tactics according to the differences of the load tendencies and ACEs. The method conducts classification on all units; the units match with each other to carry out the water-fire-wind combined automatic generation control; the frequency adjustment ability of a system is fully excavated to lower the frequency regulation reserve of the system; and the purpose of more accepting the wind power output is realized while the control quality is ensured.

The invention provides a parking track correcting method. Usually in a parking guide stage, control errors exist due to various factors such as a control system and an execution mechanism in the vehicle travel process, and inevitably, an actual travel route travelled by a vehicle controlled by the system deviates from a parking track set by the system. By the adoption of the parking track correcting method, the actual travel route of the vehicle and the parking track set by the system in advance are compared in real time to obtain the difference, when the difference is large, the parking track of the vehicle is planned again according to the actual position of the vehicle, the condition of surround obstacles and the position of a parking place, and therefore the parking process of the vehicle can be finished without collisions according to the new parking track.

This invention discloses automatic examining method and device of direct reading instrument. New method uses computer vision theory, information processing technique, digital wave form synthesis technique and design principle of intelligent instrument, solves the most key problem of automatically interpreting direct number of examined instrument in process of examining instrument, proposes using computer as examining control center of assay device, automatically processes instrument examining, design a assay device to implement this method, implements automation of reading number of electricity measuring instrument, program control standard source control, error analysis and examining report forms output. Method used by this invention is suitable to examine every kinds of electricity measuring instrument.

A roll control system is provided for controlling a roll position of a boom rotatably coupled to a support frame, the boom comprising left and right wing sections (where the roll of the boom refers to a clockwise or counterclockwise rotation of said boom relative to the support frame). A roll control mechanism is configured for rotating the boom relative to the support frame in response to a roll control signal. Wing section position measuring apparatus is configured for producing a right wing signal correlatable to a distance between the right wing section and a rightwing reference position and a left wing signal correlatable to a distance between the left wing section and a left wing reference position. Boom roll position measuring apparatus is configured for producing a boom roll signal correlatable to a roll position of the boom relative to a boom roll reference position. A controller is configured for: (i) identifying a wing section differential value and a boom roll value derived from the right and left wing signals and the boom roll signal, respectively; (ii) identifying a boom roll control error value derived from the wing section differential value and the boom roll value, the boom roll error control value being configured for deriving therefrom the roll control signal. Advantageously, the roll control system of the invention takes into account both the height differential (relative to a ground reference) between the left and right wings and the boom roll position relative to a neutral (reference) position.

The invention provides an unmanned surface vessel full state constraint trajectory tracking control method based on the saturation compensation technology, relates to the unmanned surface vessel fullstate constraint trajectory tracking control method, and aims at solving the problem of high control error caused by the fact that the present control method for unmanned surface vessel trajectory tracking control does not process the problem of state constraints and saturation. The unmanned surface vessel full state constraint trajectory tracking control method comprises the steps that step one,the kinetic model of the unmanned surface vessel is established; step two, a saturation compensation auxiliary system is designed according to the kinetic model of the unmanned surface vessel established in the step one; step three, the saturation function of the unmanned surface vessel control law is established according to the saturation compensation auxiliary system designed in the step two; step four, the closed-loop system of the unmanned surface vessel is established; step five, the external interference is processed by using the adaptive method so as to obtain the adaptive estimation error; and step six, full state constraint trajectory tracking control of the unmanned surface vessel can be realized according to the adaptive estimation error obtained in the step five. The unmannedsurface vessel full state constraint trajectory tracking control method based on the saturation compensation technology is used for the field of trajectory tracking control.

An automatic generation control (AGC) augmentation system and method for wind power plant integration for controlling the power contribution to a grid by the wind plant is disclosed that provides for the calculation of the area control error (ACE) by actively communicating to the wind plant ramp rate limits and curtailment requests contributing to the ACE calculation. The augmented control of the ACE minimizes the amount of lost energy production by the wind plant.

A floor shape estimation system for a legged mobile robot, in particular a biped walking robot, which estimates a floor shape, more specifically a foot-to-foot floor inclination difference based on at least a control error of the total floor reaction force's moment and based on the estimated value and corrects a feet compensating angle based on the estimated value. Further, the system estimates a floor shape, more specifically a foot floor inclination difference based on at least a control error of the foot floor reaction force about a desired foot floor reaction force central point and corrects a foot compensating angle based on the estimated value. With this, it can accurately estimate the shape of a floor with which the robot is in contact. Further, if the floor shape is different from what has been supposed, it can produce the floor reaction force as desired by absorbing the influence of difference.