43results about How to "Realize optimal control" patented technology

The invention provides a control scheme of a VAV (variable air volume) air-conditioning system. A neural network predictive control method is used for a tail end VAV-BOX and an air-conditioning unit, thus the hysteresis characteristic of a VAV system can be overcome, the control accuracy is improved, the resonance phenomena of an actuating mechanism can be greatly reduced, the energy-saving effect is improved by above 13%, and the control parameter tuning problem in the project is solved. A pressure independent cascade stage predictive control method is used for the tail end VAV-BOX, thus thecontrol accuracy can also be improved. The air-conditioning unit is provided with four control loops and can automatically select a static pressure control or total air volume control policy with adjustable setting static pressure by using an all-condition integrated control technology, thus the predictive control on a fan can be realized; the primary air volume of all the tail end VAV-BOXes can be detected and the air supply temperature can be adjusted according to the operation condition, thus the problem of too low temperature in partial air-conditioning area in the lowest fresh air operation is solved; the cascade stage predictive control method is adopted for a fresh air ratio control loop, thus the accurate control on the fresh air ratio can be realized and the energy-saving level can be further improved.

The invention discloses a central air conditioning fuzzy control system and a central air conditioning fuzzy control method. The central air conditioning fuzzy control system comprises central air conditioning equipment (10), a data acquirer (20), a central controller (30), an equipment controller (40) and / or an executor (50), wherein the data acquirer (20) is connected to the central air conditioning equipment (10), and is used for acquiring a plurality of operating parameters of the central air conditioning equipment (10); the central controller (30) is used for receiving the operating parameters acquired by the data acquirer (20), performing fuzzy reasoning according to the operating parameters, performing sharpening processing on reasoned fuzzy control volume, and determining output control volume; the equipment controller (3) and / or the executor (50) are / is connected to the central controller (30), and are / is used for receiving the output control volume determined by the central controller (30), and regulating the corresponding operating parameter according to a control instruction of the central controller (30). According to the central air conditioning fuzzy control system, a multiple input variable and multiple output variable central air conditioning system can be comprehensively controlled.

The invention discloses a calculation method for the security constrained unit commitment of an alternating current and direct current hybrid power grid. The method comprises the following steps that:establishing the active power equivalent models of an alternating current electric transmission line and a direct current electric transmission line, which participate in optimal scheduling, in a multi-area alternating current and direct current hybrid power grid; on the basis of the active power equivalent models, establishing a security constrained unit commitment optimal model which considerspartitioning load balance; solving the security constrained unit commitment optimal model; according to an optimization result, considering that all network monitoring elements are subjected to security correction; and if no new monitoring element power flow is out of limit, outputting an optimization result. Meanwhile, the invention discloses a corresponding system. By use of the method, power generation resources can be optimally regulated and controlled from a large range, a multi-area unit commitment scheme and the power plan of a cross-area alternating current and direct current electrictransmission line can be subjected to combined optimization, and large power grid ruling ability and electric power resource optimal configuration ability are improved.

The invention discloses an intelligent IGBT (insulated gate bipolar transistor) constant-current driving device. The intelligent IGBT constant-current driving device comprises an isolation DC (direct current)-DC module, a PLD (programmable logic device) digital control module, a DAC (digital-to-analog converter) module, a controlled constant-current source, a voltage comparison logic circuit, a gate-level current acquisition circuit and a current comparison logic circuit. A driving power source and a driving signal of a primary side control portion provide an isolated driving power source and a driving signal for a secondary side through the isolation DC-DC module, and an alarming signal of the secondary side provides an isolated alarming signal for the primary side through the isolation DC-DC module. Output ends of the driving signals, the voltage comparison logic circuit and the current comparison logic circuit are connected with an input end of a PLD digital signal, output of PLD is connected with input of the DAC module, outputs of the DAC module and a subtraction circuit are connected with input of the controlled constant-current source, and output of the controlled constant-current source is connected with gate level of IGBT. On the basis of PLD digital control, output of a control circuit can be regulated according to parameter differences of different types of IGBTs to realize optimal control of different series and different types of the IGBTs.

The invention relates to a manufacturing method of a curved micro-lens array of which the focal length varies with spatial distribution. A planar micro-lens array PDMS film is prepared on the preparedmother board, then a PDMS film varying along the radial thickness is manufactured, then a layer of PDMS is poured, the planar micro-lens array film is put on the PDMS, and then the rotationally symmetrical and radial thickness varying planar micro-lens array is manufactured after curing; and the planar micro-lens array is fixed on a closed clamp, the curved micro-lens array can be manufactured bychanging the internal and external pressure intensity difference, and all the small lenses are identical in curvature, diameter and spacing angle and different in radial film thickness so as to formthe curved micro-lens array of which the focal length varies with the spatial distribution. The method is simple in structure without complex equipment and low in cost. Compared with the planar micro-lens array, the curved micro-lens array has the characteristic of wide viewing angle possessed by the insect compound eyes, and the light condensing range of the curved micro-lens array can be changedby changing the bending degree of the micro-lens array through the pressure intensity difference.

The invention provides an underground wireless DCS (data communication system) safety monitoring system comprising a wireless network, a sensor module, an A / D (analog / digital) conversion module, a digital-analog transmission module, a server, a signal transceiver module and a processor. The sensor module, the A / D conversion module, the digital-analog transmission module, the server, the signal transceiver module and the processor are in communication by the wireless network. Environmental index parameters of different positions underground can be monitored by the system at any time and then sent to the processor of a monitoring center to be subjected to information analysis so as to realize early warning; further, accident locations of mines can be determined within a short time, emergency processing scheme making is facilitated, and safety of underground operators is guaranteed effectively.

The invention relates to a biology strengthening technology to improve oily wastewater processing system stability. It tests the waste quality, system running parameter and key biological indicator by ERIC-PCR. It selects microbiology compound fungus agent or the compound, when system running normally, enduring high load or impacted by toxic pollutant, according 1013-1015 per cubic meter, adding 1013-1016 live fungus special effect degradation functional fungus, adding compound microbiology fungus agent or the compound into the system, controlling system parameter: dissolved oxygen 2-5mg / L, taking water pH 6.5-9.0, inner system pH 6.5-8.5, biomass 109-1016CFU, and dehydrase activity 10U. The invention realizes optimal control to process system, fully improves dislodging efficiency and stability of the process system. And it also achieves high environment social and economic benefits.

The invention discloses a robot automatic production line experiment platform and a control method thereof. The robot automatic production line experiment platform is characterized in that three parallel-connected conveying belts of different conveying directions and cylinder push rods are arranged in the experiment platform to realize cyclic conveying operation of workpieces and packing boxes; image information and attitude information of the workpieces are acquired by adopting an industrial visual system; workpiece picking and packing operation is performed by adopting a robot and the grabbing hands thereof; workpiece unloading operation is performed on piece loading boxes by adopting slide stands and the grabbing hands thereof; and different settings are performed via the platform so that operation of different working modes is realized. Experiment means are provided to verification of research, simulation and control methods of different working modes on the production line, and the experiment device is also provided to the related teaching research.

A method for controlling the finish rolling steel throwing speed of a hot continuous rolling mill adopts a rack speed detector, a clamping-delivering roller speed detector, a conveying roller way speed detector, a basic automatic level control machine and a process control machine to conduct speed reduction correction and segmented speed reduction control on the speed of a conveying roller way in a laminar cooling region between a finish rolling process and a coiling process according to set process requirement, specifically a secondary tracking and positioning mode is adopted for the speed reduction point control, a secondary correction mode is adopted for tail portion speed reduction control process to achieve indirect control of tensions of strip steel and the conveying roller way.

The invention relates to a traffic signal optimization iteration method based on message matrix gridding. The method comprises the following steps of initializing a traffic network model related parameter matrix; initializing a traffic flow state matrix according to road traffic information obtained by a microwave vehicle detector and establishing a network node message function basis matrix; calculating a message function matrix of each iteration of this node; obtaining the message function matrix of the downstream node; calculating the optimal signal control quantity in the iteration; calculating the global optimization result; judging whether a system is stable; if the system is stable, stopping cyclic iteration; and otherwise, continuing the next cyclic iteration. The invention provides the signal optimization control method obtaining traffic flow information in real time in a traffic network and using the message function matrixes to realize stable optimization, rapid convergence and high real-time performance in a signal optimization iteration algorithm.

The invention relates to a composite spacer ring-nutation damper for controlling overall galloping of a wire. The composite spacer ring-nutation damper is arranged on a high-voltage power transmissionsplit conductor and comprises a wire clamp spacer ring damping device and nutation damping devices, wherein the wire clamp spacer ring damping device is connected with each split sub-conductor, and the nutation damping devices are connected with the wire clamp spacer ring damping device and arranged on the two sides of the wire clamp spacer ring damping device. Compared with the prior art, the composite spacer ring-nutation damper has the advantages of being high in energy consumption, self-adaptive in energy consumption, high in sensitivity, convenient to install, convenient to design according to needs and the like, and has important value for solving the technical problem of galloping control of the high-voltage power transmission split conductor, especially overall galloping control of the conductor.

The invention provides a method for preparing ramie based on oxidation reduction potential regulation. The method comprises the steps of preparing a degumming solution, mixing raw ramie and degumming solution, adjusting pH value of the degumming solution, heating, stirring, and completely removing colloid by utilizing the oxidability of peroxides; optimizing and adjusting the pH value, the reaction temperature, the reaction time and the concentration of a chemical reagent in real time by detecting oxidation reduction potential (ORP) parameter in an online manner; and controlling the initial ORP value of the degumming solution between +320mV and +360mV, the residual gum content the prepared fiber is reduced to be below 2.3%, the polymerization degree, the strength and the elongation at break of refined dry flax are the maximum relatively, and the degumming efficiency and the physical and mechanical properties are the best within the range. According to the method, the change of the ORP value is changed to regulate the oxidation degumming process, the degumming efficiency is improved, the fiber damage is alleviated, the excellent degumming effect is achieved, the optimized control of the ramie preparation process is realized, and important theoretical and application significances are achieved.

The present invention discloses a simulation test system for dynamic monitoring coal reservoir sensitivity and drainage control. The simulation test system comprises: a sample loading, confining pressure loading and pressure measurement module, which is configured to load a test sample, apply a confining pressure to the test sample in a test process, and measure and record pressure data in the test process; a gas-liquid fluid displacement injection module, which is configured to wash a test pipeline, vacuum the test system, and inject the gas-liquid fluid used for the test into the sample loading, confining pressure loading and pressure measurement module; and a gas-liquid collection and measurement module, which is configured to collect gas and liquid from the sample loading, confining pressure loading and pressure measurement module, and measure the amount of the collected gas and liquid. According to the test system provided by the present invention, the permeability change in the sensitivity generating process in the coal reservoir during the in-situ coalbed methane drainage can be dynamically monitored in real time, the effective control of the coalbed methane well drainage can be implemented, and the test system has high controllability, easy installation, and safety and reliability.

The invention provides an oil pumping unit well group flexible drive control system. The oil pumping well group flexible drive control system comprises a plurality of single well flexible control units and a lumped control unit; each single well control unit is correspondingly connected to one oil pumping unit; each single well flexible control unit transmits a single well production parameter and a real time condition to a lumped control unit; the lumped control unit collects data information of all single wells in the well group to perform fusion, analyzes and calculation to output various control parameters corresponding to all single wells and transmits the various control parameters to the flexible control unit of each single well; after each single well flexible control unit receives the control parameters, the single well flexible control unit regulates the operation mode and operates according to the received parameters. The oil pumping unit well group flexible drive control system realizes well group optimization regulation and control by the means of the single well flexible control, improves integral energy efficiency level of the well group, changes a traditional optimization control mode which focus on the single well and achieves system comprehensive energy saving.

The present invention is a technological process of utilizing multicomponent second phase change in regulating aluminium-based solid solution component, and relates especially to the technological process of regulating solid solution components in crude aluminium foil. Different phase change reactions in aluminium alloy for aluminium foil is utilized and the phase change reaction is controlled in thermodynamic and dynamic conditions to regulate the aluminium-base solid solution component effectively. The process can optimize the Fe and Si solid solubility, textural structure and treating process of crude aluminium foil.

The invention discloses a method and product for improving the magnetic conductivity of an iron-based magnetic powder core based on the magnetic exchange length, and belongs to the technical field of soft magnetic materials and powder metallurgy. The preparation method comprises the following steps: firstly, coating the surface of iron-based soft magnetic powder with a silicon dioxide insulating layer to obtain iron-based / silicon dioxide soft magnetic composite powder; then adding the nanoscale iron-based soft magnetic powder into the binder, uniformly mixing and ultrasonically dispersing to obtain the binder with uniformly dispersed nanoscale iron-based soft magnetic powder; and finally, uniformly mixing the iron-based / silicon dioxide soft magnetic composite powder, a binder with uniformly dispersed nano-scale iron-based soft magnetic powder and a release agent, performing compression molding, and performing heat treatment to obtain a product of which the distance between magnetic phases in the iron-based magnetic powder core is controlled within a magnetic exchange length (30-75nm), so that the magnetic induction intensity and the magnetic conductivity of the product are effectively improved. The method is simple in process, easy to operate, low in production cost and suitable for popularization and application.

The invention provides a control scheme of a VAV (variable air volume) air-conditioning system. A neural network predictive control method is used for a tail end VAV-BOX and an air-conditioning unit, thus the hysteresis characteristic of a VAV system can be overcome, the control accuracy is improved, the resonance phenomena of an actuating mechanism can be greatly reduced, the energy-saving effect is improved by above 13%, and the control parameter tuning problem in the project is solved. A pressure independent cascade stage predictive control method is used for the tail end VAV-BOX, thus thecontrol accuracy can also be improved. The air-conditioning unit is provided with four control loops and can automatically select a static pressure control or total air volume control policy with adjustable setting static pressure by using an all-condition integrated control technology, thus the predictive control on a fan can be realized; the primary air volume of all the tail end VAV-BOXes can be detected and the air supply temperature can be adjusted according to the operation condition, thus the problem of too low temperature in partial air-conditioning area in the lowest fresh air operation is solved; the cascade stage predictive control method is adopted for a fresh air ratio control loop, thus the accurate control on the fresh air ratio can be realized and the energy-saving level can be further improved.

The invention discloses a temperature equalizing controller, which comprises a single chip, a temperature measuring unit, a temperature control output unit and a keystroke-type input unit, wherein the temperature measuring unit, the temperature control output unit and the keystroke-type input unit are connected with the single chip; and the temperature equalizing controller is characterized in that: a temperature value inputted by the keystroke-type input unit is used as a temperature set value, an on-site temperature value which is measured by the temperature measuring unit in real time is used as a temperature feedback value, a proportion integral differential (PID) control is introduced, a PID parameter is obtained according to a temperature error signal between the temperature set value and the temperature feedback value, the single chip transmits a relevant control signal according to the PID parameter to control the on-site temperature through the temperature control output unit. Due to the adoption of the temperature equalizing controller, the on-site temperature can be measured in real time, the on-site temperature can be adjusted according to the temperature measuring situation and a manual setup situation, the manual setup is completed by operating the keystrokes, and the optimized control of the temperature controller can be realized.

The invention relates to an intelligent control method for an air temperature and humidity of a greenhouse in facility agriculture. According to the method, two fuzzy controllers and a coordinating controller work cooperatively; the coordinating controller identifies a current operation state of a system; when an error is large, the fuzzy controller I is selected, so that temperature and humidity parameters fall back to a reasonable zone rapidly; and when an error is small, the fuzzy controller II is selected, so that temperature and humidity parameters are stabilized in a small range close to a target value. With the method, problems of large overshoot and low stability precision of the traditional single-structure fuzzy control method can be solved. Moreover, because the coupling relation between environment factors are taken into consideration fully by a multi-factor coordination control strategy, the regulation way is more scientific and reasonable than the single-factor control way.

The invention discloses a train quantitative loading system and method, and particularly relates to the technical field of train quantitative loading control. According to the technical scheme, the train quantitative loading system comprises a loading management computer system and a main pipeline, the loading management computer system is connected with a quantitative loading instrument, the quantitative loading instrument is connected with an explosion-proof junction box, one end of the explosion-proof junction box is connected with an oil spilling electrostatic protector, and one end of the explosion-proof junction box is connected with an emergency stop control cabinet; and an IC card reader is arranged in the quantitative loading instrument, one end of the oil spilling electrostatic protector is connected with an electrostatic grounding switch, one end of the oil spilling electrostatic protector is connected with an oil spilling protection switch, and one end of the emergency stop control cabinet is connected with an on-site explosion-proof emergency stop operation column. The train quantitative loading system and method have the beneficial effects that indirect intervention of manual work on the loading process is reduced, the investment of labor cost and time cost is reduced, the operation efficiency is improved, and the error rate is reduced.

The invention discloses a temperature control device and a temperature control method, which relate to the technical field of steel making. The temperature control device comprises a combustion-supporting air flow regulating module and a temperature regulating module, wherein the combustion-supporting air flow regulating module is connected with a mixed gas pipeline through a gas flow meter; the combustion-supporting air flow regulating module is connected with the mixed gas pipeline through a gas calorimeter; the combustion-supporting air flow regulating module is connected with a combustion-supporting air pipeline through a combustion-supporting air flow meter; the combustion-supporting air flow regulating module is connected with the combustion-supporting air pipeline through a combustion-supporting air regulating butterfly valve; the temperature regulating module acquires the temperature of a clad through an infrared thermometer; and the temperature regulating module is connected with the mixed gas pipeline through a gas regulating butterfly valve, electric signals are acquired, and according to the electric signals, the gas regulating valve is controlled to regulate the flow of the gas in the mixed gas pipeline. Thus, the operation is simple and convenient; accurate measurement and accurate control on the temperature are realized; energy is saved; the product quality is ensured; the service life of a ladle heater is prolonged; and the cost is saved.

The invention discloses a multi-friction-contact-surface nonlinear vibration absorption-energy consumption device for a momentum wheel. The multi-friction-contact-surface nonlinear vibration absorption-energy consumption device comprises a vibration reduction elastic piece, an auxiliary support, a mounting bolt, a tightening bolt, a mounting nut and a tightening nut. The vibration absorption mass is designed on the vibration reduction elastic piece, and vibration energy can be transferred from the momentum wheel to the vibration reduction elastic piece according to the dynamic vibration absorption principle. A horizontal non-linear friction contact surface is formed between the vibration reduction elastic piece and a spoke of the momentum wheel, a vertical non-linear friction contact surface is formed between the vibration reduction elastic piece and the auxiliary support, and efficient dissipation of vibration energy in the process of transferring the vibration energy from the momentum wheel to the vibration reduction elastic piece is achieved through the dry friction hysteresis energy dissipation effect of the multiple friction contact surfaces. Optimal control over dry friction hysteresis energy consumption can be achieved by adjusting the tightening torque for tightening the nut. The vibration absorption-energy consumption device has the advantages of being simple in structure, wide in vibration reduction frequency band, high in vibration reduction efficiency, high in load adaptability and the like, and has wide application prospects in the field of vibration control.

The invention discloses an optimized adjustment and control method of a passenger vehicle high-strength integral side body stamping technology. The method comprises the steps that S1, an integral sidebody is divided into a local complex difficult-to-form structure, a local sharp difficult-to-form structure, a peripheral arc-shaped flanging structure and an inner hole arc-shaped flanging structure; S2, the blank holder face of the local complex difficult-to-form structure is divided into three blank pressing regions to be subjected to sectioning blank pressing operation, and oil mist lubrication is adopted by a female and male die side wall region and a female and male die circular corner region; S3, the region, located on the periphery of the local sharp difficult-to-form structure, of ablank is determined to serve as a local temperature control position, and local temperature control is conducted; S4, drawing beads are designed according to the curvature and the drawing depth of anarc-shaped flanging portion of the peripheral arc-shaped flanging structure, and a first material storage chamber is designed; and S5, technological holes are designed according to the curvature and the drawing depth of an arc-shaped flanging portion of the inner hole arc-shaped flanging structure, and a second material storage chamber is designed. The optimized adjustment and control method of the passenger vehicle high-strength integral side body stamping technology can achieve stamping forming of the high-strength integral side body, and prevents the local breakage defect from being generated.

A method and apparatus for processing a projection signal, which solve the problem in the prior art that a terminal is powered off or reset due to excessively large impact current of a projector, realize optimized control of the terminal on the usage of battery power, avoid the risk of terminal power-off or reset due to a sudden drop in the battery power caused by projection impact, and improve user experience. The method comprises: acquiring a supply voltage of a terminal (S102); acquiring the voltage of a projection signal of a projector on the terminal (S104); and determining whether to perform attenuated output on the projection signal according to the supply voltage and / or the voltage of the projection signal (S106).

The invention relates to a manufacturing method of a curved micro-lens array of which the focal length varies with spatial distribution. A planar micro-lens array PDMS film is prepared on the preparedmother board, then a PDMS film varying along the radial thickness is manufactured, then a layer of PDMS is poured, the planar micro-lens array film is put on the PDMS, and then the rotationally symmetrical and radial thickness varying planar micro-lens array is manufactured after curing; and the planar micro-lens array is fixed on a closed clamp, the curved micro-lens array can be manufactured bychanging the internal and external pressure intensity difference, and all the small lenses are identical in curvature, diameter and spacing angle and different in radial film thickness so as to formthe curved micro-lens array of which the focal length varies with the spatial distribution. The method is simple in structure without complex equipment and low in cost. Compared with the planar micro-lens array, the curved micro-lens array has the characteristic of wide viewing angle possessed by the insect compound eyes, and the light condensing range of the curved micro-lens array can be changedby changing the bending degree of the micro-lens array through the pressure intensity difference.

The invention discloses an aluminum alloy anode material for batteries. The aluminum alloy anode material is prepared from the following components in percentage by mass: 0.001-1% of lanthanum, 0.001-1% of gallium, 0.001-1% of magnesium, 0.001-1% of indium and the balance of aluminum. The invention further provides a preparation method of the aluminum alloy anode material for batteries. According to the preparation method, three types of different thermal treatment processes such as high temperature and long time, medium temperature and short time and low temperature and long time are matched with a deformation process, and optimal regulation and control on material components, texture structures and alloy phase of the aluminum alloy anode material are achieved. The addition of alloy elements is appropriately adjusted, and with the combination of appropriate plastic formation processes and thermal treatment processes of the aluminum alloy anode material, optimal matching of multiple elements can be achieved, and requirements of power source discharge can be met under a large current density of 500mA / cm<2> / 1000mA / cm<2>. The aluminum alloy anode material disclosed by the invention is short in production process procedure, easy in process parameter control, good in aluminum alloy anode product quality, low in production cost and beneficial to on-scale production.

The invention relates to a composite spacer ring-nutation damper for controlling overall galloping of a wire. The composite spacer ring-nutation damper is arranged on a high-voltage power transmissionsplit conductor and comprises a wire clamp spacer ring damping device and nutation damping devices, wherein the wire clamp spacer ring damping device is connected with each split sub-conductor, and the nutation damping devices are connected with the wire clamp spacer ring damping device and arranged on the two sides of the wire clamp spacer ring damping device. Compared with the prior art, the composite spacer ring-nutation damper has the advantages of being high in energy consumption, self-adaptive in energy consumption, high in sensitivity, convenient to install, convenient to design according to needs and the like, and has important value for solving the technical problem of galloping control of the high-voltage power transmission split conductor, especially overall galloping control of the conductor.

The invention relates to a traffic signal optimization iteration method based on message matrix gridding. The method comprises the following steps of initializing a traffic network model related parameter matrix; initializing a traffic flow state matrix according to road traffic information obtained by a microwave vehicle detector and establishing a network node message function basis matrix; calculating a message function matrix of each iteration of this node; obtaining the message function matrix of the downstream node; calculating the optimal signal control quantity in the iteration; calculating the global optimization result; judging whether a system is stable; if the system is stable, stopping cyclic iteration; and otherwise, continuing the next cyclic iteration. The invention provides the signal optimization control method obtaining traffic flow information in real time in a traffic network and using the message function matrixes to realize stable optimization, rapid convergence and high real-time performance in a signal optimization iteration algorithm.

The invention discloses an intelligent IGBT constant current drive device, which comprises an isolated DC-DC module, a PLD digital control module, a DAC digital-to-analog conversion module, a controlled constant current source, a voltage comparison logic circuit, a gate-level current acquisition circuit and Current comparison logic circuit. The driving power and driving signal of the primary side control part provide isolated driving power and driving signal for the secondary side through the isolated DC-DC module, and the alarm signal of the secondary side provides an isolated alarm signal for the primary side through the isolated DC-DC module; The output terminals of the driving signal, the voltage comparison logic circuit and the current comparison logic circuit are connected to the input terminal of the PLD digital signal, the output of the PLD is connected to the input of the DAC digital-to-analog conversion module, and the output of the DAC digital-to-analog conversion module and the subtraction circuit is connected to the controlled constant The input of the current source is connected, and the output of the controlled constant current source is connected to the gate level of the IGBT through the driving resistor Rg. The device of the present invention takes PLD digital control as the core, and can adjust the output of the control loop according to the difference in parameters of different types of IGBTs, so as to realize the optimal control of different series and types of IGBTs.

The invention provides a regulation method of generation of oxidized cellulose in a ramie oxidizing and degumming process. The regulation method includes the following steps: preparing a degumming liquid and mixing raw hemp of ramie with the degumming liquid; regulating the pH of the degumming liquid; heating and stirring the mixture to fully removal colloid through oxidizing property of peroxides; on-line detecting generation quantity of the oxidized cellulose; and optimizing and regulating the pH, reaction temperature, reaction time and chemical reagent concentration in real time to control the aldehyde group content in the oxidized cellulose to be 15-40 [mu]mol / g and the carboxyl group content to be 120-200 [mu]mol / g, so that the fiber crystallization degree, polymerization degree, strength, breaking elongation and fineness of the prepared fine dry ramie fiber are maximum and the degumming efficiency and the physical mechanical performance are best within the ranges of the parameters. The method can increase degumming efficiency and reduce fiber damage, achieves best degumming effect, achieves optimum control in the preparation process of the ramie fiber, and has important theoretical meaning and application value.