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Automatic control method and system of thermal-power-unit SCR denitration ammonia spraying
ActiveCN106582284AImprove securityImprove economyGas treatmentDispersed particle separationAutomatic controlControl objective
The invention discloses an automatic control method of thermal-power-unit SCR denitration ammonia spraying. The automatic control method includes the steps that the smoke flow and SCR-inlet-nitric-oxide concentration are obtained; the smoke flow is multiplied by the SCR-inlet-nitric-oxide concentration, and the basic-nitric-oxide content in smoke is obtained; the basic-nitric-oxide content is multiplied by the set denitration efficiency, and the basic-liquid-ammonia demanded quantity is obtained; the denitration-outlet-nitric-oxide content is obtained, the denitration-outlet-nitric-oxide content is compared with a denitration-outlet-nitric-oxide set value, an initial correction factor is obtained, a final correction factor is obtained in cooperation with further correction, and the liquid-ammonia demanded quantity is corrected. As the denitration-outlet-nitric-oxide set value is introduced, the denitration-outlet-nitric-oxide concentration serves as a final control target, the control target is specific, physical inspection and operation intervention intensity of operational persons are reduced, and the operational persons are liberated out of busy working. The invention also discloses an automatic control system of thermal-power-unit SCR denitration ammonia spraying.
Owner:HENAN CHINA RESOURCES POWER GUCHENG
Automatic control method for central cold supply system
ActiveCN1869532AControl objectives are clearGuaranteed uptimeSpace heating and ventilation safety systemsLighting and heating apparatusAutomatic controlFrequency conversion
The invention discloses an automatic control method of centralized cold providing system. It is a recurrent cold providing system which includes cooling water set, a frequency conversion pump, freezing water pipes net and the terminal air-condition units. The control method is that the recurrent cold proving system is disassembled many unattached control circle. A main control parameter and a regulable parameter are set in each circle. Through adjusting the parameters to adjust and control the change of the parameter, in different circles the control parameters and the regulable parameter interfere each other. The automatic control method provides a systemic solution for centralized cold providing system. It can comparatively separate the control of key equipments, such as the cold water motors, the frequency conversion pump, the adjusting valve etc. It deals with the influence of each other as a interferential variable to definitize the control target, run stably. So it can realize economizing energy and depressing the running cost.
Owner:GUANGZHOU METRO GRP CO LTD +1
Intelligent driving preview control method and device and storage medium
The invention discloses an intelligent driving preview control method and device and a storage medium, and relates to the technical field of lane keeping methods.The intelligent driving preview control method comprises the following steps of using transverse deviation, course angle deviation and yaw velocity deviation between a target track point and a preview track point when a vehicle runs as state variables; constructing a cost function by taking the yaw velocity as a control quantity; calculating a minimum value of the cost function to obtain a target yaw velocity; and according to the target yaw velocity, and based on feedforward control, feedback control, adaptive compensation control and cross slope compensation of the steering wheel rotation angle, calculating a target steering wheel rotation angle to execute a control action. The multi-point preview control system is designed according to the lateral deviation, the course angle deviation and the yaw velocity deviation, the yaw velocity control quantity is introduced as the control cost, and the smoothness of lateral control of the vehicle is ensured on the basis of improving the control precision and robustness.
Owner:DONGFENG COMML VEHICLE CO LTD
Harmonic current compensating method based on fast Fourier transform
ActiveCN102412579ASolve for precise compensationGuaranteed accuracyHarmonic reduction arrangementAc network to reduce harmonics/ripplesHysteresisFast Fourier transform
The invention provides a harmonic current compensating method based on fast Fourier transform. For an occasion that double-sequence current decoupling control is adopted for chain static synchronous compensator (STATCOM) inner loop circuit control, and harmonic current compensating precision is ensured by correcting a harmonic current instruction under the condition that inner loop control bandwidth is relatively low. The compensating method comprises the following steps of: firstly, respectively performing fast Fourier transform (FFT) analysis on load current and current converter output current; secondly, calculating the errors of a load current amplitude value, a current converter output current amplitude value, a load current phase and a current converter output current phase, and respectively correcting a harmonic current amplitude value and a phase instruction according to the errors; and finally, reconstructing the corrected amplitude values / phases to obtain the harmonic current instruction of a chain current converter. The influence of the bandwidth and delay of a controller on the harmonic current compensating precision is considered to keep the errors of the output current and the load harmonic current within hysteresis width, the harmonic current compensating precision is improved, and the practical engineering value is relatively high.
Owner:CHINA ELECTRIC POWER RES INST +1
Thickness deviation-on-plate control method of cold-rolled sheet
ActiveCN109201745AThickness fluctuation is smallControl objectives are clearRoll mill control devicesMeasuring devicesControl mannerStrip steel
The invention relates to a thickness deviation-on-plate control method of a cold-rolled sheet. The invention adopts a cold rolling absolute thickness difference thickness deviation-on-plate control mode, a difference value of center thickness of strip steel and a set thickness value is calculated correspondingly so as to ensure the control mode of the thickness deviation-on-plate of the strip steel whole plate, the small fluctuation of the thickness of an edge part in the length direction of the strip steel is guaranteed, and a control strategy of bending roll first and displacement later is adopted; and a control scheme of the thickness deviation-on-plate thickness absolute value refers to the fact that when the thickness deviation-on-plate is controlled, an absolute value thickness control mode is adopted, a control mode is implemented according to a each thickness value of a transverse position. According to the method, a thickness deviation-on-plate overall level in a cold rollingrolling process can be enhanced, the thickness deviation-on-plate of a cold rolling high-thickness and high-precision product is improved, the cold rolling product quality is improved, the shearing amount is reduced, and the productivity is improved; the problems that an existing control mode is poor in control effect on the thickness deviation-on-plate, the length and width of the thickness valuesituation of the strip steel whole plate cannot be comprehensively reflected, and the yield is low are solved.
Owner:BAOSHAN IRON & STEEL CO LTD
Power coordination controller applied to optical storage system
ActiveCN110912246AImprove power generation efficiencyStable power supplyBatteries circuit arrangementsEnergy storageHemt circuitsControl theory
A power coordination controller applied to an optical storage system is provided. A single-chip microcomputer controls a photovoltaic power generation system and a storage battery pack, the photovoltaic power generation system and the storage battery pack are connected with a load, and the power coordination controller comprises voltage acquisition circuits I and II, current acquisition circuits Iand II, a DC-DC circuit, a driving circuit and a temperature acquisition circuit; the voltage acquisition circuit I and the voltage acquisition circuit II are connected to pins PA1 and PA2 of the single-chip microcomputer; the current acquisition circuit I and the current acquisition circuit II are connected to pins PA4 and PA5 of the single-chip microcomputer; the DC-DC circuit is connected withthe single-chip microcomputer through a drive circuit, and the drive circuit is connected to a pin PA8 of the single-chip microcomputer. The temperature acquisition circuit is connected to a pin PA6of the single-chip microcomputer; the photovoltaic power generation system is connected with the storage battery pack through a DC-DC circuit; the first load forms a second load available voltage through the step-down circuit. According to the invention, cooperation between photovoltaic power supply and a storage battery charging and discharging mode in a maximum power state is realized, and long-term stable operation of a photovoltaic power generation system and a storage battery pack with a large load in a combined power supply manner is realized.
Owner:LANZHOU JIAOTONG UNIV
Self-adaptive cruise control method for electric automobile
ActiveCN112590789ASatisfy the followingImprove comfortSpeed controllerElectric energy managementSelf adaptiveState prediction
The invention discloses a self-adaptive cruise control method for an electric automobile. The method comprises the following steps: estimating sliding acceleration by adopting a multi-forgetting-factor recursive least square algorithm; establishing motion state prediction models of the front vehicle and the vehicle; designing an adaptive cruise upper-layer controller based on the sliding acceleration estimated in the step 1 and the two-vehicle motion state prediction model established in the step 2; and designing an adaptive cruise lower-layer controller according to the inverse longitudinal kinetic model of the vehicle. According to the method, the sliding acceleration is estimated online through the multi-forgetting-factor recursive least square algorithm, and the estimated sliding acceleration is introduced into the upper-layer controller established based on the model prediction control theory, so that the vehicle following performance, safety and economy are met; the minimum acceleration fluctuation and the minimum driving and braking switching frequency serve as comfort targets, the driving and braking switching frequency in the self-adaptive cruise control process can be remarkably reduced, and the comfort of the whole vehicle is improved.
Owner:JILIN UNIV
12/6-pole hybrid rotor structure magnetic suspension switched reluctance generator and control method thereof
The invention discloses a 12 / 6-pole hybrid rotor structure magnetic suspension switched reluctance generator and a control method thereof. A stator of the generator has 12 tooth poles, each stator tooth pole is wound by a winding, a rotor is formed by axial superposition of 6 tooth poles and a disc and has no windings. The pole width of salient poles of the generator stator is the same as that of salient poles of the rotor. The structure enables inductance of each phase to have a 1 / 2 cycle to be located in a flat area of the bottom, 1 / 4 to be located in a rising area, and 1 / 4 to be located in a falling area. In power generation operation, only three phases in a mechanical structure which form 120 degrees with one another and whose inductance is located in the flat area and the rising area are conducted, each phase independently controls generation of suspension force and provides excitation for a power generation stage, and the rest three phases located in the inductance falling area generates electricity with follow current. The novel generator integrates a radial magnetic bearing and a switched reluctance motor, rotor pole braking torque is large, generated output is large, influence of suspension phase current on power generation phase current is small, and the radial load capacity is high.
Owner:JIANGSU UNIV
Active filter control method and system
ActiveCN112653147AReduce harmonic levelsHigh precisionActive power filteringElectric power transfer ac networkTarget controlControl objective
The invention relates to an active filter control method and system. The method comprises the following steps of selecting a basic topological structure that an active filter is connected to a high-voltage power grid through a passive filter, setting the harmonic capacity of the active filter, and setting a current detection point, obtaining a power grid current according to the current value of the detection point, comparing the power grid current with the APF output current, and obtaining the modulation voltage of the APF by using the proportionality coefficient K. The method is not influenced by the impedance change of an AC system, and can achieve a target control effect. And when the control targets are different, different filtering effects can be achieved respectively. The problem that the harmonic level of the converter bus seriously exceeds the standard due to background harmonic amplification of the AC system of the high-voltage direct current transmission project can be solved, and the control effect is stable and flexible.
Owner:STATE GRID ECONOMIC TECH RES INST CO +1
Optimization control method suitable for UHVDC commutation failure fault recovery
ActiveCN113098045AReduce marginClear recovery control objectivesElectric power transfer ac networkPower oscillations reduction/preventionDc currentControl engineering
The invention discloses an optimization control method suitable for UHVDC commutation failure fault recovery. The method comprises the following steps: 1, acquiring a DC voltage, a DC current, a converter turn-off angle and a bus phase voltage of an AC system at an inverter side of a UHVDC system in real time; 2, constructing dynamic current margin control by using a difference value between a rectification side-direct current instruction value and an inversion side direct-current measurement value and a slope of a current margin function; and 3, after the fault is cleared, through the inverter side converter, adopting constant current control to make the dynamic current margin control take effect, so that the current margin in the fault recovery process is reduced. According to the method, the direct-current control target in the UHVDC system low current recovery process can be determined, so that the probability of unstable recovery of the system caused by improper interaction of the rectification side constant current controller and the inversion side constant current controller is reduced, and the subsequent commutation failure generated in the UHVDC fault recovery process is effectively inhibited.
Owner:HEFEI UNIV OF TECH +2
Graded control and running method of No.0 high-pressure heater of power plant set
ActiveCN111396855AEnsure safetyAlarm is accurateLiquid degasificationBoiler controlControl objectiveControl engineering
The invention discloses a graded control and running method of a No.0 high-pressure heater of a power plant set. The method comprises the following steps of making a control target of the No.0 high-pressure heater clear and definite; secondly, carrying out modular division on multiple working conditions of running of the No.0 high-pressure heater; and thirdly, dividing a control process into threestages of control. The method can be suitable for full-automatic operation putting of the No.0 high-pressure heater under the multiple working conditions of the set, meanwhile, the multiple working conditions in the set can be subjected to modular distinguishing, the aims of graded response and precise control are achieved, the adjusted amount runs in an optimum interval, meanwhile, for an abnormal working condition, in-advance early warning and accurate alarm giving can be achieved, rapid response is achieved, and the whole economy and safety of the set can be obviously improved.
Owner:XIAN THERMAL POWER RES INST CO LTD
Feedforward control method for edge drop of head part and tail part of strip steel
ActiveCN104249083AControl objectives are clearGuarantee normal implementationRoll mill control devicesMetal rolling arrangementsEngineeringStrip steel
The invention discloses a feedforward control method for edge drop of a head part and a tail part of strip steel. The feedforward control method comprises the following steps: dividing the head part and the tail part of the strip steel into a plurality of segments along the direction of travel of the strip steel; for each of the segments, performing the following steps: getting n points from the edge part to the center of the strip steel and in the width direction of the strip steel; collecting edge drop values, at the n points, of the incoming strip steel; determining a play value, which corresponds to each point, of a working roll through the following model formula: DeltaWRSi=-ki{[(EC-Ei)-alpha]*beta+m}; calculating the sum DeltaWRS of play values which correspond to the n points; executing the DeltaWRS so as to perform edge drop control. According to the feedforward control method for the edge drop of the head part and the tail part of the strip steel, accurate control can be performed on the edge drop of the head part and the tail part of the strip steel.
Owner:BAOSHAN IRON & STEEL CO LTD
Automatic control method and system for scr denitrification and ammonia injection of thermal power units
ActiveCN106582284BImprove securityImprove economyGas treatmentDispersed particle separationAutomatic controlControl system
The invention discloses an automatic control method of thermal-power-unit SCR denitration ammonia spraying. The automatic control method includes the steps that the smoke flow and SCR-inlet-nitric-oxide concentration are obtained; the smoke flow is multiplied by the SCR-inlet-nitric-oxide concentration, and the basic-nitric-oxide content in smoke is obtained; the basic-nitric-oxide content is multiplied by the set denitration efficiency, and the basic-liquid-ammonia demanded quantity is obtained; the denitration-outlet-nitric-oxide content is obtained, the denitration-outlet-nitric-oxide content is compared with a denitration-outlet-nitric-oxide set value, an initial correction factor is obtained, a final correction factor is obtained in cooperation with further correction, and the liquid-ammonia demanded quantity is corrected. As the denitration-outlet-nitric-oxide set value is introduced, the denitration-outlet-nitric-oxide concentration serves as a final control target, the control target is specific, physical inspection and operation intervention intensity of operational persons are reduced, and the operational persons are liberated out of busy working. The invention also discloses an automatic control system of thermal-power-unit SCR denitration ammonia spraying.
Owner:HENAN CHINA RESOURCES POWER GUCHENG
A closed-loop control method for fuel cell water management
ActiveCN103700870BShort control periodControl objectives are clearFuel cell auxillariesAdaptive controlLoop controlFuel cells
Owner:TSINGHUA UNIV
Transient stability prevention and control aided decision making method based on security domain
ActiveCN106849058ASmall amount of calculationImprove efficiencyDesign optimisation/simulationPower oscillations reduction/preventionPrevention controlSecurity domain
The invention belongs to the technical field of transient stability prevention and control aided decision making of a power grid and discloses a transient stability prevention and control aided decision making method based on a security domain. The method comprises the steps that practical dynamic security domain information, power grid operation mode information and control cost information are obtained firstly, then transient stability assessment based on the practical dynamic security domain is performed, control strategy calculation based on transient stability improvement is performed, strategy calculation of node injection power reduction control and node injection power improvement control is performed through alternative iteration, and finally additional control strategy calculation of power grid power balance is performed. Rapid analytical calculation of transient stability control aided decision making is achieved by fully utilizing results of offline and online security and stability assessment, limit calculation and control aided decision making analytical calculation, the accuracy and efficiency of transient stability prevention and control aided decision making are constantly improved, and the method has the important significance on improvement of power grid security and stability operation level and improvement of security and stability control benefits.
Owner:NANJING NARI GROUP CORP +4
Wireless charging system and constant-current/constant-voltage charging optimization control method
ActiveCN112421792AControl objectives are clearEasy to controlBatteries circuit arrangementsSecondary cells charging/dischargingLoad circuitTransmitter coil
The invention discloses a wireless charging system and a constant-current / constant-voltage charging optimization control method, and belongs to the technical field of wireless power transmission. Thewireless charging system is characterized in that the primary side of the system comprises an input power supply, a Buck circuit, a full-bridge inverter, a primary side transmitting coil, a compensating circuit and a primary side MCU, and the secondary side of the system comprises a load, a Boost circuit, a full-wave rectifier, a secondary side receiving coil, a compensation circuit and a secondary side MCU. According to the invention, disturbance control is carried out on the output impedance of the Buck circuit by the primary side system and closed-loop control is carried out on the output current / voltage by the secondary side system, so that the output impedance of the Buck circuit can be stabilized at an optimal output impedance value while the output current / voltage is stabilized neara reference value, accurate control in the constant-current / constant-voltage charging process and optimization of the electric energy transmission efficiency of the system are achieved, and wirelesscommunication is not needed; and the sampling object of the sampling circuit is the direct current quantity, so that the implementation is easy, and the hardware requirement is low.
Owner:JIANGNAN UNIV
Auxiliary decision-making method for transient stability preventive control based on safety domain
ActiveCN106849058BSmall amount of calculationImprove efficiencyDesign optimisation/simulationPower oscillations reduction/preventionTransient statePower grid
Owner:NANJING NARI GROUP CORP +4
Production process for eliminating boron micro-alloying hot-rolled steel strip edge faults
A production process for eliminating boron micro-alloying hot-rolled steel strip edge faults is characterized by meeting key control conditions that when content of [B] in steel is smaller than 0.0013%, content of [Mn] is larger than or equal to 0.35% while content of [S] is smaller than or equal to 0.005%; when content of [B] in steel is larger than or equal to 0.0013% and smaller than or equal to 0.0020%, content of [Mn] is larger than or equal to 0.40% while content of [S] is smaller than or equal to 0.005%; the content of molten steel N of continuous casting tundish is controlled to be smaller than or equal to 60ppm; the corner temperature of continuous casting billets in a straightening area of a segment is over 1000 DEG C so that a brittleness temperature range of 850-950 DEG C is avoided; the content of molten steel P is controlled to be smaller than or equal to 0.015% while the content of C is out of the range of 0.09-0.17%. By the production process, control target is clear, operations can be realized easily and conveniently, corner transverse cracks caused by boron micro-alloying of the continuous casting billets can be eliminated completely, manual operations of checking and cleaning the corner faults of the billets are omitted, qualified steel strip products can be rolled directly, production processes are simplified, energy consumption is reduced, labor intensity of workers is lowered, and product quality is stable and reliable.
Owner:通化钢铁股份有限公司
Coordinated control method of AC and DC microgrid based on power electronic transformer
ActiveCN108258694BRunning status unchangedControl power exchangeAc network load balancingSingle ac network with different frequenciesPower flowTransformer
The present invention provides an AC / DC micro-grid coordinated control method based on a power electronic transformer. The AC-DC micro-grid coordinated control method based on a power electronic transformer includes the following steps: 1. Collect real-time operation data of the micro-grid and establish a micro-grid distribution 2. Calculate the average value of the distributed energy output power and the average value of the load demand power in the current dispatching cycle to obtain the expected value of the state of charge of the microgrid energy storage; 3. Divide the type of microgrid operating status, , According to the type of micro-grid operating status, the power electronic transformer controls the power flow and size of the AC-DC micro-grid. The beneficial effects of the present invention are: the AC-DC micro-grid coordinated control method based on the power electronic transformer can realize the maximum consumption of distributed energy, improve the service life of the energy storage battery, and reduce the number of power feedbacks from the micro-grid to the distribution network and power loss during feedback.
Owner:NANJING INST OF TECH
A power coordination controller applied to optical storage system
ActiveCN110912246BImprove power generation efficiencyStable power supplyBatteries circuit arrangementsEnergy storageHemt circuitsControl theory
A power coordinating controller applied to the photovoltaic storage system, the single-chip microcomputer controls the photovoltaic power generation system and the battery pack, the photovoltaic power generation system and the battery pack are connected to the load, and has voltage acquisition circuits I and II, current acquisition circuits I and II, and DC‑DC Circuit, drive circuit, temperature acquisition circuit; voltage acquisition circuit Ⅰ and voltage acquisition circuit Ⅱ are connected to pins PA1 and PA2 of the microcontroller; current acquisition circuit Ⅰ and current acquisition circuit Ⅱ are connected to pins PA4 and PA5 of the microcontroller; DC‑DC The circuit is connected to the single-chip microcomputer through the driving circuit, and the driving circuit is connected to the pin PA8 of the single-chip microcomputer; the temperature acquisition circuit is connected to the pin PA6 of the single-chip microcomputer; the photovoltaic power generation system is connected to the battery pack through the DC-DC circuit; the first load forms the second load through the step-down circuit. Load available voltage. The invention realizes the cooperation between the photovoltaic power supply and the charging and discharging mode of the storage battery under the maximum power state, and realizes long-term and stable operation of the joint power supply of the photovoltaic power generation system and the storage battery group with a large load.
Owner:LANZHOU JIAOTONG UNIV
A Feed-forward Control Method for Strip Head and Tail Edge Drop
ActiveCN104249083BControl objectives are clearGuarantee normal implementationRoll mill control devicesMetal rolling arrangementsStrip steelControl theory
The invention discloses a feedforward control method for edge drop of a head part and a tail part of strip steel. The feedforward control method comprises the following steps: dividing the head part and the tail part of the strip steel into a plurality of segments along the direction of travel of the strip steel; for each of the segments, performing the following steps: getting n points from the edge part to the center of the strip steel and in the width direction of the strip steel; collecting edge drop values, at the n points, of the incoming strip steel; determining a play value, which corresponds to each point, of a working roll through the following model formula: DeltaWRSi=-ki{[(EC-Ei)-alpha]*beta+m}; calculating the sum DeltaWRS of play values which correspond to the n points; executing the DeltaWRS so as to perform edge drop control. According to the feedforward control method for the edge drop of the head part and the tail part of the strip steel, accurate control can be performed on the edge drop of the head part and the tail part of the strip steel.
Owner:BAOSHAN IRON & STEEL CO LTD
A Vehicle Adaptive Cruise Control Method Considering Multiple Objectives
ActiveCN105857309BControl objectives are clearEasy to debugExternal condition input parametersExternal condition output parametersDynamic modelsCruise control
Owner:JILIN UNIV
A Hierarchical Control and Operation Method of No. 0 High Addition of Power Station Units under Multiple Operating Conditions
ActiveCN111396855BControl objectives are clearEasy to controlLiquid degasificationBoiler controlControl objectiveControl engineering
A hierarchical control and operation method for No. 0 high-increase operation of a power station unit under multiple working conditions, comprising the following steps: (1) specifying the control target of No. 0 high-increase; (2) multi-working conditions for the operation of No. 0 high-increase Carry out modular division; (3) divide the control process into three-level control, this method can adapt to the automatic operation of No. To achieve the purpose of graded response and precise control, the adjusted quantity can be operated in the optimal range, and at the same time, it can provide early warning, accurate alarm and quick response in the face of abnormal conditions, which significantly improves the overall economy and safety of the unit.
Owner:XIAN THERMAL POWER RES INST CO LTD
Harmonic current compensating method based on fast Fourier transform
ActiveCN102412579BSolve for precise compensationGuaranteed accuracyHarmonic reduction arrangementAc network to reduce harmonics/ripplesFast Fourier transformHysteresis
The invention provides a harmonic current compensating method based on fast Fourier transform. For an occasion that double-sequence current decoupling control is adopted for chain static synchronous compensator (STATCOM) inner loop circuit control, and harmonic current compensating precision is ensured by correcting a harmonic current instruction under the condition that inner loop control bandwidth is relatively low. The compensating method comprises the following steps of: firstly, respectively performing fast Fourier transform (FFT) analysis on load current and current converter output current; secondly, calculating the errors of a load current amplitude value, a current converter output current amplitude value, a load current phase and a current converter output current phase, and respectively correcting a harmonic current amplitude value and a phase instruction according to the errors; and finally, reconstructing the corrected amplitude values / phases to obtain the harmonic current instruction of a chain current converter. The influence of the bandwidth and delay of a controller on the harmonic current compensating precision is considered to keep the errors of the output current and the load harmonic current within hysteresis width, the harmonic current compensating precision is improved, and the practical engineering value is relatively high.
Owner:CHINA ELECTRIC POWER RES INST +1
A method for adaptive cruise control of electric vehicles
ActiveCN112590789BSatisfy the followingImprove comfortSpeed controllerElectric energy managementState predictionCruise control
The invention discloses an adaptive cruise control method for an electric vehicle, which comprises the following steps: estimating the sliding acceleration by adopting a recursive least squares algorithm with multiple forgetting factors; establishing a motion state prediction model of the vehicle in front and the vehicle; The sliding acceleration and the two-vehicle motion state prediction model established in step 2 are used to design the upper controller for adaptive cruise; the lower controller for adaptive cruise is designed according to the inverse longitudinal dynamics model of the vehicle. The present invention estimates the sliding acceleration online through the multi-forgetting factor recursive least squares algorithm, and introduces the estimated sliding acceleration into the upper-layer controller established based on the model predictive control theory, while satisfying the vehicle followability, safety and economy, Taking the minimum acceleration fluctuation and driving-braking switching frequency as the comfort target can significantly reduce the driving-braking switching frequency in the process of adaptive cruise control and improve the vehicle comfort.
Owner:JILIN UNIV
A 12/6-pole hybrid rotor structure magnetic levitation switched reluctance generator and its control method
The invention discloses a 12 / 6-pole hybrid rotor structure magnetic suspension switched reluctance generator and a control method thereof. A stator of the generator has 12 tooth poles, each stator tooth pole is wound by a winding, a rotor is formed by axial superposition of 6 tooth poles and a disc and has no windings. The pole width of salient poles of the generator stator is the same as that of salient poles of the rotor. The structure enables inductance of each phase to have a 1 / 2 cycle to be located in a flat area of the bottom, 1 / 4 to be located in a rising area, and 1 / 4 to be located in a falling area. In power generation operation, only three phases in a mechanical structure which form 120 degrees with one another and whose inductance is located in the flat area and the rising area are conducted, each phase independently controls generation of suspension force and provides excitation for a power generation stage, and the rest three phases located in the inductance falling area generates electricity with follow current. The novel generator integrates a radial magnetic bearing and a switched reluctance motor, rotor pole braking torque is large, generated output is large, influence of suspension phase current on power generation phase current is small, and the radial load capacity is high.
Owner:JIANGSU UNIV
Pneumatic membrane building deformation monitoring system
PendingCN112964222APrevent collapse accidentsAvoid safety accidentsMeasurement devicesMembrane bodiesDeformation monitoring
The invention relates to a pneumatic membrane building deformation monitoring system. The technical problem that an existing constant-pressure control strategy cannot effectively prevent a membrane top from collapsing under heavy snow load is mainly solved. According to the technical scheme, the pneumatic membrane building deformation monitoring system comprises a pneumatic membrane building composed of a gas membrane building retaining wall and a gas membrane body, and further comprises at least two displacement sensors for monitoring deformation of the pneumatic membrane building, a base, a stay wire, a plurality of annular lifting hooks, a membrane top fixing block and a pneumatic membrane building deformation monitoring device. The base is arranged on an inner wall of the gas membrane building retaining wall , the membrane top fixing block is arranged on the inner top face of the gas membrane body, the annular lifting hooks are evenly arranged on the inner top face of the gas membrane body and located between the membrane top fixing block and the bottom end of the inner top face of the gas membrane body, and the displacement sensors for monitoring deformation of the gas membrane building are installed on the base. One end of the stay wire is connected with the displacement sensors, and the other end of the stay wire penetrates through the annular lifting hooks to be connected with the membrane top fixing block.
Owner:山西清露金华节能科技有限公司
A wireless charging power supply side circuit with reduced number of switch tubes and its application
ActiveCN104009551BSimple structureControl objectives are clearBatteries circuit arrangementsElectric powerTelecommunicationsInductive charging
The invention relates to a wireless charging power supply side circuit reducing the number of switching tubes. The wireless charging power supply side circuit reducing the number of the switching tubes is characterized by comprising a rectification inverter circuit and a plurality of primary side coils which are controlled by the rectification inverter circuit. The rectification inverter circuit comprises an AC / DC rectifier. The output end of the AC / DC rectifier is connected with n bridge arms in parallel, wherein n is larger than or equal to 3. Each bridge arm comprises two switching tubes, and the leading-out end between the two switching tubes of each bridge arm is connected with one end of the corresponding primary side coil. The leading-out end Wi and the leading-out end Wj of every two bridge arms are connected with one primary side coil Wi-Wj, wherein i is not equal to j, and the primary side coil Wi-Wj is charged. The leading-out ends of the n bridge arms are combined for charging the primary side coils, wherein the number of the primary side coils can be seen in the specifications.
Owner:南京超颖新能源科技有限公司
A method for controlling the same-plate difference of cold-rolled plates
ActiveCN109201745BThickness fluctuation is smallControl objectives are clearRoll mill control devicesMeasuring devicesControl mannerStructural engineering
The invention relates to a thickness deviation-on-plate control method of a cold-rolled sheet. The invention adopts a cold rolling absolute thickness difference thickness deviation-on-plate control mode, a difference value of center thickness of strip steel and a set thickness value is calculated correspondingly so as to ensure the control mode of the thickness deviation-on-plate of the strip steel whole plate, the small fluctuation of the thickness of an edge part in the length direction of the strip steel is guaranteed, and a control strategy of bending roll first and displacement later is adopted; and a control scheme of the thickness deviation-on-plate thickness absolute value refers to the fact that when the thickness deviation-on-plate is controlled, an absolute value thickness control mode is adopted, a control mode is implemented according to a each thickness value of a transverse position. According to the method, a thickness deviation-on-plate overall level in a cold rollingrolling process can be enhanced, the thickness deviation-on-plate of a cold rolling high-thickness and high-precision product is improved, the cold rolling product quality is improved, the shearing amount is reduced, and the productivity is improved; the problems that an existing control mode is poor in control effect on the thickness deviation-on-plate, the length and width of the thickness valuesituation of the strip steel whole plate cannot be comprehensively reflected, and the yield is low are solved.
Owner:BAOSHAN IRON & STEEL CO LTD
A Feedwater Control Method to Suppress Main Steam Pressure Rise in FCB Process
The invention provides a feed water control method for restraining main steam pressure increasing in the FCB process. After a central control unit detects the FCB action, a small steam turbine drive steam source switching control module controls a steam feed pump drive steam source to be switched so that the steam feed pump drive steam source can be switched to steam from a boiler reheater cold segment from original steam turbine four-level pumped steam; after a first time interval is up, the central control unit sends a second pulse signal to a steam feed pump recycling adjusting door module, a first feed pump minimum flow valve is opened to a preset opening degree in an overriding manner and is switched into a manual control manner; and after a second time interval is up, the central control unit sends a third pulse signal to a steam feed pump rotating speed adjusting module, and the preset feed pump target output force is reduced in an overriding manner according to a preset rate. The stability of running of a water supply system is improved; and by means of quick reducing of the feed pump output force, the quick increasing of main steam pressure after the FCB action is effectively restrained, and a good basis is laid for FCB function achieving of a unit.
Owner:ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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