156results about How to "Realize online control" patented technology

The invention discloses a method for determining the commutation failure of a high voltage direct current system, which comprises the following steps: S1 calculating the load component and the fault additional component of commutation voltage on a conversion bus of the high voltage direct current system when a fault occurs in a certain point thereof under a given fault close angle; S2 determining an integral interval and calculating the actual commutation voltage time area; S3 comparing the actual commutation voltage time area with the critical commutation voltage time area and determining whether the fault of the point can cause the commutation failure or not; S4 repeating the step S1 to step S3 and determining an alternating current fault region which causes the commutation failure of the high voltage direct current system. The invention further discloses a device for determining the commutation failure of the high voltage direct current system, which comprises a preparing unit, a calculation unit and a determining unit. The method and the device can greatly reduce the calculation scale, lead the precision to meet the needs of engineering applications, disclose the mechanism of how the fault close angle affects the commutation failure and be applicable to the analysis of fault steady state and fault transient state.

The invention discloses a hydraulic cylinder test bench load simulation device and a control method thereof. The hydraulic cylinder test bench load simulation device comprises a test bench frame, a control system, a loading hydraulic cylinder and a tested hydraulic cylinder, wherein the control system comprises an industrial personal computer, a PLC (programmable logic controller), a positional system control module and a loading system control module, the industrial personal computer sends a displacement signal to the PLC to drive the tested hydraulic cylinder to run, a displacement sensor detects the displacement signal of the tested hydraulic cylinder, the displacement sensor feeds the displacement signal back to the positional system control module so as to adjust displacement of the tested hydraulic cylinder on the one hand, and sends the displacement signal to the industrial personal computer on the other hand, the industrial personal computer converts the displacement signal into a simulation resultant force signal, and sends the simulation resultant force signal to the loading system control module so as to drive the loading hydraulic cylinder to perform opposite vertex loading on the tested hydraulic cylinder, and simultaneously a pull pressure sensor detects a pull pressure signal, and feeds the pull pressure signal back to the loading system control module after comparing the pull pressure signal with the simulation resultant force signal so as to form force negative feedback control. The hydraulic cylinder test bench load simulation device and the control method thereof achieve high automation of the hydraulic cylinder test bench load simulation device, and is high in accuracy and strong in practicability.

The invention relates to an online vibration control tilting-pad radial sliding bearing device which comprises a state-adjustable tilting-pad radial sliding bearing, a detection unit, a control unit and an execution mechanism, wherein the radial position of each pad of the state-adjustable tilting-pad radial sliding bearing can be adjusted in real time; in the detection unit, a high-precision vibration sensor is mounted near the tilting-pad sliding bearing and connected with a main control computer; the control unit mainly comprises a main control computer and is connected with a servo motor and an automatic stop protection system (alarm); and the execution mechanism comprises a ball screw connected with the servo motor, a wedge block mounted on a screw nut and a support block in contact with the wedge block. The device provided by the invention judges the bearing state through the collected vibration signal in the operation process, performs corresponding adjustment on the radial position of the tilting pad according to the judgment result, and even executes automatic stop protection so as to realize online control on the bearing vibration to meet control requirement for vibration in the actual operation process of the bearing.

The invention provides a PID locomotive automatic driving optimal control method based on reinforcement learning. The PID locomotive automatic driving optimal control method comprises the steps of: regarding current route information and a speed difference between a locomotive actual running speed and an optimal speed as input of reinforcement PID at first, acquiring a group of optimal PID controlparameters through reinforcement learning, realizing PID control according to the optimal PID control parameters provided by a reinforcement learning module, providing a control quantity, and controlling operation of a locomotive. The PID locomotive automatic driving optimal control method applies reinforcement learning to PID parameter adjustment, can interact with the environment by means of reinforcement learning, has the self-learning capability, can realize the PID control having the optimal parameter group, improves the optimization effect, and reduces manual design difficulty.

The embodiment of the invention discloses a charging method and a charging system which relates to the communication field. The charging method on-line provided by the embodiment includes: the charging system receives charging requirement of operation first network element, distributes charging context sign of operation for operation, and returns charging context sign of operation to first network element; the charging system receives charging request of operation second network element, wherein, the charging requirement carries charging context sign of operation transferred from first network element to second network element, the charging system obtains each charging conversation of charging context sign with same operation according with charging context sign of operation, and obtains result associated with charging by processing operation charging information association to each charging conversation; the charging system can control charging to operation according with result associated with charging. The technical scheme provided by the invention can realize charging association, and can realize charging on-line control to operation.

The invention discloses an intelligent following control system and an intelligent following control method for a cable of a chain-driving coal cutter. The system comprises a following control terminal which is used for communicating with a coal cutter control mainframe, used for controlling the running of the coal cutter and controlling a cable drawing device of the coal cutter to run. The method comprises the following steps: (1) initializing the following control terminal; (2) controlling the tensioning and collecting the signals of a chain and a cable clamp; (3) starting and running a following control system; (4) judging if a running feedback signal of the coal cutter exists between the coal cutter control mainframe and a following control mainframe; (5) judging if a rotating direction of a motor is anticlockwise when the running feedback signal of the coal cutter exists; (6) judging if the change in tensioning force of the chain is decreasing when no running feedback signal of the coal cutter exists; and (7) alarming for fault and halting the following control system. According to the invention, the following state of the coal cutter and the cable drawing device of the coal cutter can be monitored in real time, the cable of the coal cutter can be protected and dragged in time and the secondary bending of the cable is avoided in a coal mining process of the coal cutter.

The invention discloses an additive manufacturing device capable of conducting magnetic field control and parent metal transport. A magnetic field is applied in the metal laser solid forming quick solidification process, a thermoelectric current can be generated at the quickly solidified solid/liquid interface under the action of the magnetic field, the thermoelectric current and the magnetic field interact to generate thermoelectric magnetic force triggering melt flow, shearing is caused after the force effect is conducted on the end of dendritic crystal, thus, the dendritic crystal is broken, a lot of new crystal nucleuses are formed, and the nucleation rate is increased; and metal melt flow is inhibited by the magnetic field, and the segregation effect in the solidification process is relieved. According to the additive manufacturing device, different laser metal additive manufacturing parent metal transport devices are combined, and parent metal transport and structure control under the conditions of powder paving, powder feeding and wire feeding and other various printing conditions are achieved. The magnetic field control device is fixed to a laser transmitter to serve as a parent metal transport device, the effect that a laser molten pool is located at the center of the magnetic field all the time is ensured, control over the magnetic field is facilitated, and the influence of the magnetic field on the laser solid forming quick solidification process is further explored.

This invention relates to passive gas chamber pressure flexible polishing tool, which comprises the following parts: one gas chamber with polishing math as work surface on front end installed in one sustaining rack; the said sustaining rack is installed on one rotation axis connected with one cover tube; the said cover tube is connected to the drive axis with outer source entrance and overflow valve; the cover tube drive axis is opened with gas channel connected to the gas chamber. The invention provides one mode curve polishing tool with high efficiency and quality.

The invention provides a powder particle size distribution control device and a method of a disc mill system. The device comprises a feeding device, a movable disc rotating speed adjusting device, a servo system, a sampling device, a powder particle size distribution detecting device and an upper computer system, wherein the feeding device is connected with the upper computer system; a frequency converter is respectively connected with the upper computer system and a three-phase asynchronous motor; the three-phase asynchronous motor is connected with a movable grinding disc of the disc mill system; the servo system drives the movable grinding disc to horizontally move; the powder particle size distribution detecting device measures and analyzes powder samples, and adjusts the gap of grinding discs, the rotating speed of the movable disc and the feeding quantity of the disc mill system; and the upper computer system outputs signals of controlling the frequency converter and instructions of controlling the servo system to increase or reduce the gap of the grinding discs. The servo system is adopted to drive the horizontal displacement of the movable grinding disc, so that the control precision of the displacement of the movable grinding disc is effectively improved; a position sensor is adopted to return actual displacement data of the movable grinding disc; the given displacement of the movable grinding disc is corrected in real time; and the gap size of the grinding discs is used for realizing the powder particle size distribution control.

The invention provides a staged control method for camber based on the flat shape of the hot-rolled middle blank. It can fulfill the precise control of complex camber. The method comprises the steps of: acquiring the coordinates of the edge point at the operation side on the surface of the middle blank and the coordinates of the edge point of the transmission side; determining the coordinates of the center line point in the width direction of the middle blank based on the acquired coordinates of the edge point at the operation side and the edge point of the transmission side; fitting the curve on the center line point coordinates in the width direction of the middle blank, dividing the length direction of the middle blank into sections; determining the total roll gap leveling value of each section of the middle blank; tracking the location of the middle blank in the rolling process, generating the control strategy of the downward inclination in sections of the total length of camber in the middle blank based on the total roll leveling value of each section of the middle blank. This invention can be used to the online control of the hot-rolled middle blank camber.

The invention discloses a test method and a system for IMU automatic calibration. The method comprises the following steps of: generating a calibration instruction and a test instruction according toa setting of a user interface, wherein the calibration instruction controls the working state of a turntable; collecting specified data in the test instruction according to the working state; callinga control algorithm to calculate a calibration parameter and a calibration error according to the specified data; and performing error compensation according to the calibration parameter and the calibration error, and sending the updated calibration parameter to the IMU and simultaneously outputting the test result. The invention also discloses a system which belongs to the same concept as the method, and the calibration intermediate process does not need people to participate, the universality is good, the automation level is high, so that the calibration and the testing have high efficiencyand high precision, and meanwhile, and the data integration management, the online control and the monitoring are achieved.

The invention relates to a microwave drying control system based on a dielectric property dynamic change. A dielectric property dynamic change value of a material is monitored by pre-inputting a mathematical model so as to improve the quality the fruits and vegetables and medicinal materials of different batches and varieties after microwave drying. The whole process is as follows: firstly inputting a mathematic relation model of a dielectric constant, a dielectric dissipation factor and water and temperature distribution of the material at a certain frequency before microwave drying, and establishing a mathematical model library of the dielectric constant and the dielectric dissipation factor changing with temperature and water; performing online monitoring on the dynamic change value of the dielectric property in the microwave drying process by means of online real-time monitoring of water and temperature; and controlling the microwave drying process to optimize the drying quality of the material by integrally analyzing influence of the dielectric property, water and temperature on the drying process, wherein negative effects such as charring in the drying process is avoided.

The invention discloses an overflow type intelligent air distribution control system, which is used for intelligently managing ventilation of an underground mine. A bifurcate door and a motor for controlling the opening and closing of the bifurcate door are arranged at an air inlet cylinder in a ventilating system; at least one gas sensor and at least one differential pressure sensor are arranged in a tunnel; and a computer control system is respectively in circuit connection with the motor, a gas sensor and a differential pressure sensor and controls the motor to adjust the opening and closing sizes of the bifurcate door according to data received from the gas sensor and the differential pressure sensor, so that the air inlet quantity is controlled, and the accumulated gas can be slowly and safety exhausted. By the overflow type intelligent air distribution control system, the air inlet quantity of the air cylinder is accurately controlled in real time according to the on-site gas concentration, and intelligent control is guaranteed, so that the gas is safely and reliably exhausted, and the safety of a mine is guaranteed.

The invention belongs to the field of preparation of inorganic materials, and particularly relates to a microwave homogeneous hydrothermal synthesis method of magnesium-aluminum hydrotalcite. The method comprises the following steps: weighing soluble magnesium nitrate, aluminum nitrate and urea according to a certain ratio, and dissolving in deionized water; subpackaging the solution in a microwave digestion tank, sealing, putting in a microwave digestion instrument, and performing microwave heating at a set temperature for a set time to quickly finish synthesis; and pouring out all solids and liquids in the microwave tank, washing with deionized water and anhydrous ethanol, performing vacuum drying, grinding, and storing. By adopting microwave radiation heating, the method provided by the invention has the characteristics of energy saving and high efficiency, can realize temperature and pressure on-line control, and has the advantages of high reproducibility and operational safety; meanwhile, the method does not need pH regulation, and is simple to operate; and the product is high in particle size uniformity. In general, the microwave homogeneous hydrothermal synthesis method established by the invention has the characteristic of being simple, quick and efficient to operate, and is a laboratory method for quickly synthesizing magnesium-aluminum hydrotalcite of a uniform particle size.

The invention discloses a PSO-LSSVM-based on-line control method and apparatus for dosing of a water island. The method comprises: M groups of historical parameter values with outgoing water indexes meeting requirements of an incoming water monitoring index as well as a historical dosing amount of a dosing drug corresponding to each historical parameter value group are obtained; on the basis of a least-squares support vector machine, an on-line control LSSVM model is established, wherein the historical parameter values are input vectors of the LSSVM model and historical dosing amounts are output vectors of the LSSVM model; a PSO algorithm is executed on the LSSVM model and an optimal solution of parameters in the LSSVM model is calculated; and the calculated optimal solution is inputted into the LSSVM model to obtain a dosing model of a water island; an incoming water monitoring index is monitored in real time to obtain a group of real-time parameter values; and real-time parameter values are inputted into the dosing model of the water island and the dosing amounts of the dosing drugs at a current time are determined. With the method, the influence on the operating process by the quality of incoming water can be eliminated; the dosing amount is updated in real time; the drug wasting is reduced; and thus costs are lowered.

The invention discloses a voltage multi-model fusion control method for a solid oxide fuel cell (SOFC). The method has strong non-linear characteristics aiming at the SOFC system. Based on a plurality of typical load working conditions, a multi-model controller is designed. Through control of the fuel quantity input to the SOFC system, the constant voltage output of the system is controlled. Based on the proportion integration (PI) controller design under a plurality of typical working conditions, combined with the characteristic that the perturbation current of the system is measurable, according to the measured perturbation current, the multi-model controller realizes fusion of output controlled quality of each sub-controller to obtain fuel control quality to be input to the SOFC system. The method can maintain the stability of the output voltage of the solid oxide fuel cell system within the range of all working conditions, and raises the safety and economical efficiency of system operation.

The invention provides a gas bag polishing tool capable of initiatively distributing abrasive particles, which comprises a gas bag, a gas transmitting shaft, a gas pump, a liquid-injecting device and a liquid-collecting device, wherein the gas bag comprises a retaining frame and a gas bag shell; the gas transmitting shaft is sleeved in a gas conduction sleeve; the gas conduction sleeve is provided with a through hole; the through hole is communicated with a gas outlet of the gas pump; the gas conduction sleeve is connected with the gas transmitting shaft in a sealing way; the liquid-injecting device is used for filling with polishing liquid; the liquid-collecting device comprises a liquid-collecting disc which is fixedly connected with the gas transmitting shaft and a plurality of liquid-transporting pipes which are used for transporting the polishing liquid; the liquid-collecting disc is provided with an annular liquid-collecting groove and a liquid-flowing channel which is communicated the liquid-collecting groove with the liquid-transporting pipes; the liquid-collecting groove is aligned to a liquid-injecting nozzle of the liquid-injecting device; the liquid-injecting nozzle is connected with the liquid-collecting groove in a sealing way; the gas bag shell is evenly provided with a series of liquid outlets; and the liquid outlets are communicated with outlets of liquid-transporting pipes. The gas bag polishing tool has the advantages that the polishing liquid is automatically added, the abrasive particles are initiatively distributed, and the abrasive dusts are automatically treated during polishing.

The invention relates to a myrialiter-grade supercritical carbon dioxide fluid extraction system. The myrialiter-grade supercritical carbon dioxide fluid extraction system comprises a condensing system, an extraction system, a separation system and a recovery system which are arranged in a sequentially connected mode. By arranging the condensing system adopting two stages of condensers, the extraction system comprises five-stage series-connection extraction kettles with the height-diameter ratio being (8 to 20):1, the separation system adopts a separation kettle and cyclone hydraulic separatorcombined mode, the arranged recovery system comprises a recovery condenser, an exhaust gas tank and a diaphragm compressor, thus the total extraction volume of the supercritical carbon dioxide fluidextraction system reaches the myrialiter grade, energy consumption can be greatly saved, the utilization rate of carbon dioxide is increased, and zero emission of carbon dioxide is achieved. Through data, it is shown that the energy consumption cost of the supercritical carbon dioxide fluid extraction system is reduced from about 5,000 yuan to 1,000 yuan for treating of a single ton of materials,and a solid step is advanced more for replacing a traditional solvent leaching process.

The invention discloses a GA-SVR-based water island medicine adding on-line control method and device. The method comprises the following steps: m groups of historic parameter values of incoming water monitoring indexes in a time period when outgoing water parameters satisfy requirements are obtained, historic medicine addition quantities of added medicament corresponding to all groups of historic parameter values are obtained, an on-line control SVR model is built based on a support vector regression machine, the historic parameter values are input vectors for the SVR model, the historic medicine addition quantities are output vectors for the SVR model, the SVR model is subjected to GA algorithm operation, optimal solutions for parameters in the SVR model are obtained, the obtained optimal solutions are input into the SVR model, a medicine adding model for a water island is obtained, real time parameter values of the incoming water monitoring parameters are monitored in real time, the real time parameter values are input into the medicine adding model for the water island, and therefore a medicine addition quantity of the added medicament for current time is determined. Via the method disclosed in the invention, influence exerted on operation processes by water quality of incoming water can be overcome, the medicine addition quantity can be updated in real time, medicament waste can be reduced, and cost can be lowered.

The invention discloses a clean steel spectral standard sample, which comprises the chemical elements by weight percent as follows: 0.0017 to 0.0279 percent of C, 0.0100 to 0.0221 percent of Si, 0.118 to 0.271 percent of Mn, 0.0067 to 0.0108 percent of P, 0.0037 to 0.0056 percent of S, 0.0021 to 0.0064 percent of Ni, 0.0095 to 0.0176 percent of Cr, 0.0030 to 0.0135 percent of Cu, 0.0251 to 0.0649 percent of Ti, 0.0014 to 0.0466 percent of Alt, 0.00123 to 0.0030 percent of N, and the rest percent of Fe and inevitable impurities. The invention further discloses a preparation method of the clean steel spectral standard sample, which comprises the steps: a, smelting and sampling; b, forging; c, lathe machining; d, homogeneity examination; e, deterministic analysis of characteristic quantity values and the determination of each characteristic quantity value.

The invention relates to the technical field of welding, in particular to a fusion depth self-adaption laser stitch welding device and a welding method thereof. The fusion depth self-adaption laser stitch welding device comprises a laser welding module for releasing laser beams to stacked plates to be welded from the front surface, a pressing piece for adjusting the distance between the stacked plates to be welded, a detecting module for detecting welding parameters of the stacked plates to be welded from the back surface, and a controller for adjusting the pressing degree of the pressing piece and/or operation parameters of the laser welding module in real time according to the welding parameters detected by the detecting module. Such welding parameters as the back surface temperature andred images of welding lines during welding of the plates to be welded are detected in real time; and a control system controls the pressing degree of the pressing piece or the operation parameters ofthe laser welding module according to the welding parameters to timely adjust the welding process to realize the fusion depth self-adaption stable control of the welding lines.

The invention relates to a dissolved oxygen (DO) intelligent control system based on the RBF (radial basis function) neural network and belongs to the fields of water treatment and intelligent control. By building a control module, a hardware platform is built to form a set of complete DO intelligent control system; and DO can be accurately and more easily controlled in real time in a sewage treatment process. The DO intelligent control system based on the RBF neural network is applied to the sewage treatment process, and an electrically operated valve of an air blower is accurately controlled, so that accurate control on concentration of the DO is realized. The DO intelligent control system provided by the invention can be used for solving the problems that traditional switch control and PID control cannot realize stable and accurate control on a sewage treatment process with the characteristics such as high nonlinearity, strong coupling, time variance, large lag and serious uncertainty and realizes intelligent control on the concentration of the DO, and results show that the system provided by the invention realizes control on the concentration of the DO, and can improve sewage treatment effect and reduce energy consumption.