15 results about "Decoupling controller" patented technology

This invention provides a high-precision fatigue testing method for hinges, belonging to the field of hinge fatigue testing technology. This invention utilizes a crack identification and prediction model to output a three-dimensional defect distribution map and a crack initiation risk score, adjusting the stress amplitude accordingly. A multi-channel decoupling controller calculates the coupling coefficient based on the Jacobian matrix and employs an inverse kinematics compensation algorithm to eliminate inter-channel interference when applying combined bending and torsional loads. During the fatigue cycle, adaptive zero-point calibration is performed at intervals. A Kalman filter algorithm is used to predict and compensate for the sensor's zero-point drift, and a temperature compensation coefficient is combined to correct for thermal drift effects. An improved rainflow counting method is used to extract cycle pairs, and the direction of the maximum damage surface is identified using the critical plane method to calculate the cumulative fatigue damage value. When the cumulative fatigue damage value reaches the damage threshold, a crack is identified. This invention solves the problem of insufficient testing accuracy caused by multi-axis load coupling interference during hinge fatigue testing.

The invention discloses an RTP equipment temperature control method and device based on feedforward decoupling. A heating model is obtained based on input and output response data fitting of a heating area of RTP equipment; selecting an element with the maximum lag time in diagonal elements of the heating model as a reference basis, constructing a diagonal target transfer function matrix containing time delay characteristics, and ensuring that the lag time of each diagonal element is not less than the actual physical lag time of a corresponding channel; a feedforward decoupling controller model is solved based on the heating model, a direct control loop matrix and a feedback control loop matrix are obtained through calculation, the direct control loop matrix and the feedback control loop matrix are deployed in a temperature control system, and closed-loop temperature control is conducted on the multiple heating areas of the RTP equipment in combination with a PID controller. According to the method, the advantages of low complexity and quick response of the feedforward decoupling algorithm are combined, the physical realizability problem of the decoupler is solved by introducing the target transfer function matrix, and high-precision multi-region temperature synchronous control is realized.

The invention belongs to the technical field of electronic power, and discloses a fan control method based on a feed-forward compensation decoupling controller and related equipment. The draught fan control method based on the feed-forward compensation decoupling controller comprises the steps that the coupling relation between input and output of all channels in a draught fan control system is confirmed through a relative gain matrix analysis method, a feed-forward compensation decoupler is obtained based on the coupling relation, and the feed-forward compensation decoupler is applied to the draught fan control system. Performing decoupling processing on the input of each channel; the rotating speed of the draught fan can be accurately controlled through decoupling, the noise reduction effect is achieved, and meanwhile the heat dissipation requirement of the whole machine is met.

The invention relates to the technical field of mine tunneling, in particular to a function decoupling regulation and control system and method for the hot and humid environment of a deep mine TBM tunneling face. According to the method, multi-source environment parameters are obtained, the hot and humid state and air quality data are generated through fusion processing, and the current hot and humid grade and the oxygen demand are recognized; outputting an environment grade result and an oxygen supply demand signal; and constructing an oxygen supply-cooling-environment coupling thermodynamic model, and estimating the functional coupling degree of the two systems in a future time period in combination with a dynamic prediction method. The self-adaptive decoupling controller is used for dynamically optimizing energy consumption distribution of the oxygen supply and cooling system according to a prediction result, regulation and control parameters are generated, control signals of oxygen supply equipment and cooling equipment are output according to the regulation and control parameters, and dynamic decoupling of the oxygen supply and cooling functions is achieved. The problems of response lag, too high energy consumption and control conflict caused by system coupling in traditional control are solved, and the accuracy, energy efficiency and stability of tunneling face environment regulation and control in the deep high-temperature and high-humidity environment are improved.

The invention discloses a thickness and tension self-adaptive decoupling control method and system in the rolling process, and relates to the technical field of metal rolling automatic control. The method aims at solving the problems that in the rolling process, a strong coupling effect exists between a thickness control system and a tension control system, and a traditional decoupling method is difficult to adapt to dynamic working conditions. The method comprises the steps that real-time working condition parameters in the rolling process are obtained; dynamically determining a decoupling compensation amount through a self-adaptive decoupling controller based on the real-time working condition parameters and a thickness-tension coupling relation model; and carrying out feedforward compensation on a thickness control system and a tension control system by using the decoupling compensation amount. According to the method, by dynamically determining the decoupling compensation amount and conducting feedforward compensation, mutual interference between control loops can be actively and accurately offset, working condition changes are tracked in real time, and the working condition adaptability and robustness of the system are enhanced, so that the thickness control precision and the tension stability are remarkably improved, and the product quality and the production efficiency are improved.

The application discloses a five-phase permanent magnet synchronous motor harmonic current control method and device based on impedance remodeling, relates to the high-performance driving control technical field of a multi-phase permanent magnet synchronous motor, and comprises the following steps: obtaining motor current, combining system total delay to calculate stability boundary, then selecting optimal virtual impedance, auxiliary attenuation gain parameter combination and current loop control bandwidth by using a Bode diagram, and constructing a current decoupling controller comprising an impedance remodeling channel, a coupling damping compensation channel and a proportional integral regulator; then inputting motor real-time operation information and a given reference current, so that a target reference voltage is obtained to drive the motor to operate. By means of optimal parameter combination, the motor port impedance is equivalently reconstructed, disturbances caused by the nonlinear dead zone of an inverter and the voltage drop of a switching tube are weakened, wide-frequency-domain harmonic current suppression is realized, the impedance remodeling channel, the coupling damping compensation channel and the proportional integral regulator jointly constitute a two-degree-of-freedom control structure, and the dynamic response speed and the anti-disturbance capability are decoupled and independently adjusted.

The present disclosure relates to a control device (20) configured for grid- forming control using a voltage source converter, VSC, (10) electrically connected to a power grid (40) via a point-of-common-coupling, PCC, the control device (20) comprising: a decoupling controller (21) configured to determine a VSC virtual electromotive force (vEMF) of said VSC (10) based at least on a first complex signal (K; γ, δ), which first complex signal (K; γ, δ) is based at least on a complex power (Sg; Pg, Qg) being exchanged between said VSC (10) and the power grid (40), and a complex power reference (Sref, Pref, Qref) for said complex power (Sg; Pg, Qg), and a current controller (22) configured to determine a VSC voltage reference (vc,ref) for said VSC (10) based at least on a grid voltage (vg) for said power grid (40) at said PCC, and a current reference (if,ref) for a current (if) propagating between said VSC (10) and said PCC, a virtual admittance unit (24) configured to determine said current reference (if,ref) based at least on a voltage input (vin) multiplied with a virtual admittance (Yv), wherein said voltage input (vin) is based at least on a voltage difference between said VSC virtual electromotive force (vEMF) and said grid voltage (vg), and said virtual admittance (Yv) is based at least on a virtual impedance between the VSC virtual electromotive force (vEMF) and said PCC, wherein the control device (20) is configured to provide said VSC voltage reference (vc,ref) to said VSC (10), and wherein said decoupling controller (21) comprises a phase compensation unit (211) configured to apply a phase compensation to said first complex signal (K; γ, δ), which phase compensation is selected to compensate for a phase-shift introduced by said virtual impedance. A method of grid-forming control and a power supporting system is also disclosed.

The application discloses a multi-channel iteration method based on a multi-degree-of-freedom electro-hydraulic servo vibration test bench servo system decoupling method and a storage medium, and belongs to the technical field of electro-hydraulic servo control. In order to solve the problems of multi-degree-of-freedom coupling interference and insufficient waveform reproduction accuracy of a multi-channel electro-hydraulic servo vibration test bench, the application adopts an H1 non-parametric identification method to perform system identification to obtain a multi-channel transfer function matrix, and then designs a decoupling controller based on the transfer function matrix to eliminate the coupling interference between the multi-channels; finally, the control input is dynamically optimized through correction iteration, so that the purpose of improving the control accuracy of the multi-degree-of-freedom electro-hydraulic servo vibration table and accurately simulating the structural response under the action of an earthquake is achieved. The test data of the application is accurate and reliable. The application is suitable for the fields of civil engineering, traffic and machinery.

The application discloses a five-phase permanent magnet synchronous motor harmonic current control method and device based on impedance remodeling, relates to the high-performance driving control technical field of a multi-phase permanent magnet synchronous motor, and comprises the following steps: obtaining motor current, combining system total delay to calculate stability boundary, then selecting optimal virtual impedance, auxiliary attenuation gain parameter combination and current loop control bandwidth by using a Bode diagram, and constructing a current decoupling controller comprising an impedance remodeling channel, a coupling damping compensation channel and a proportional integral regulator; then inputting motor real-time operation information and a given reference current, so that a target reference voltage is obtained to drive the motor to operate. By means of optimal parameter combination, the motor port impedance is equivalently reconstructed, disturbances caused by the nonlinear dead zone of an inverter and the voltage drop of a switching tube are weakened, wide-frequency-domain harmonic current suppression is realized, the impedance remodeling channel, the coupling damping compensation channel and the proportional integral regulator jointly constitute a two-degree-of-freedom control structure, and the dynamic response speed and the anti-disturbance capability are decoupled and independently adjusted.

The application discloses a flywheel energy storage hybrid magnetic bearing LM neural network inverse decoupling controller, output ends of two dynamic prediction modules are connected in series with input ends of LM neural network inverse systems, the first dynamic prediction module is composed of two series branches, the second dynamic prediction module is composed of three series branches and a composite signal calculation module, each series branch is composed of a feedback correction module, a control increment calculation module, a prediction value calculation module and an optimal value calculation module in series, input of the first series branch is weight and reference weight, output is optimal initial weight, input of the second series branch is threshold and reference threshold, output is optimal initial threshold, combining respective advantages of dynamic prediction, LM neural network control and inverse system, initial weight and threshold of the LM neural network are optimized by the dynamic prediction module, independent and accurate control among three degrees of freedom of the flywheel energy storage hybrid magnetic bearing is realized.

The application discloses a kind of six-phase motor open-loop fault-tolerant control method suitable for low carrier ratio condition, belongs to motor fault-tolerant control field, and the present application is to solve the problem of single-phase open-loop fault-tolerant control method of existing six-phase motor in low carrier ratio condition Control performance deterioration, poor stability problem.The application includes: configuration fault-tolerant coordinate transformation matrix, the mathematical model of mutual inductance coupling in natural coordinate system is transformed into the mathematical model without mutual inductance coupling in synchronous rotating coordinate system, and the spatial voltage equation of mutual decoupling and linear independence is obtained;By coordinate positive transformation, fault-tolerant phase current is transformed into two spatial current components;Discrete second-order rotating decoupling controller is set in two spaces respectively, and voltage control quantity is generated;The motor is driven by phase voltage through coordinate inverse transformation.The application configures fault-tolerant current loop as discrete second-order system, and the distribution of closed-loop pole does not change with the reduction of carrier ratio, so that fault-tolerant control has good stability in low carrier ratio condition.

The invention discloses a stainless steel degreasing section drying temperature and humidity feedback type automatic control system and method. The system comprises a temperature and humidity sensor array, a fuzzy decoupling controller, an LSTM prediction module, a distributed heating unit and a bionic honeycomb structure protective cover. Real-time data are collected through a temperature and humidity sensor array; performing fuzzy decoupling operation based on a temperature-humidity incidence matrix to generate an independent control quantity: calling an LSTM model to predict six groups of historical sequences, and outputting temperature and humidity changes in future 30 seconds; and dynamically adjusting a PID setting curve according to a prediction result, and controlling the power of the heating unit. Through cooperative work of the distributed sensor array, the fuzzy decoupling controller and the LSTM prediction module, accurate decoupling control and advanced prediction of temperature and humidity are achieved, the problem of limitation of traditional PID control in a nonlinear system is solved, and the system has the advantages of being high in control precision, high in response speed and stable and reliable in a high-temperature environment.

The invention belongs to the technical field of monitoring and automatic control, and discloses a distributed monitoring and automatic response control system of network security equipment. Through data acquisition, deviation analysis, function modeling and coupling analysis, an interaction mechanism between safety equipment is accurately identified; equipment is divided into a strong coupling group and a weak coupling group based on controllability analysis, and a decoupling controller and a decentralized controller are applied respectively; a fusion control strategy based on the coupling influence quantity is adopted for boundary equipment, and overall coordination and smooth transition of the system are ensured. According to the invention, intelligent resource allocation and dynamic balance maintenance of a protection link are realized, so that the safety equipment keeps stable performance output in a high-voltage environment, and the protection quality in a traditional architecture is prevented from declining in a cliff manner. By establishing a complete control closed loop and continuously optimizing control parameters, the overall toughness and adaptive capacity of a safety protection system are improved, and the operation and maintenance burden of a safety team is relieved.

The invention discloses a dynamic and static power decoupling control method for a network-building converter based on a feedforward coupling term, and belongs to the technical field of power electronics. The method comprises the following steps: acquiring output voltage, current and line parameters of a network construction converter, and calculating dq-axis components and power of the voltage and the current through coordinate transformation; angular frequency and voltage are obtained through droop control, and a power angle and power grid voltage are calculated according to a circuit vector triangle; and constructing a power response matrix to calculate a power coupling term, designing a feed-forward decoupling controller to generate a compensation amount, and generating a voltage reference value for inner loop control after compensating a power angle and voltage. According to the method, power coupling terms of active power and reactive power can be accurately offset, the problems that an existing scheme is not thorough in decoupling, slow in response and difficult in engineering application are solved, the stability margin, the dynamic response speed and the reactive power control precision of the system are improved, and the method adapts to complex power grid working conditions and is high in engineering practicability.

This invention discloses an open-circuit fault-tolerant control method for a six-phase motor suitable for low carrier ratio conditions, belonging to the field of motor fault-tolerant control. The invention addresses the problem of degraded control performance and poor stability of existing single-phase open-circuit fault-tolerant control methods for six-phase motors under low carrier ratio conditions. The invention includes: constructing a fault-tolerant coordinate transformation matrix to transform the mutually inductively coupled mathematical model in the natural coordinate system into a mathematical model without mutual inductive coupling in the synchronous rotating coordinate system, obtaining mutually decoupled and linearly independent space and space voltage equations; transforming the fault-tolerant phase current into current components in two spaces through forward coordinate transformation; setting discrete second-order rotating decoupling controllers in both spaces to generate voltage control quantities; and obtaining the phase voltage to drive the motor through inverse coordinate transformation. This invention configures the fault-tolerant current loop as a discrete second-order system, where the closed-loop pole distribution does not change with decreasing carrier ratio, thus ensuring good stability of the fault-tolerant control under low carrier ratio conditions.