681 results about "Pressure control system" patented technology

The invention belongs to the field of deep sea corrosion experiment equipment, and particularly relates to a multivariable coupling control deep sea corrosion environment simulation and monitoring device, which comprises an environment control unit, a deep sea corrosion environment simulation unit, a deep sea corrosion environment simulation unit, a deep sea corrosion environment simulation unit and a deep sea corrosion environment monitoring unit, and is characterized in that the environment control unit comprises a seawater environment cabin, a test sample is vertically arranged in the seawater environment cabin, and two ends of the test sample penetrate through and extend to the outer side of the seawater environment cabin; the pressure control system and the temperature control system are connected with the seawater environment cabin through sealing flanges and are respectively used for simulating deep sea hydrostatic pressure and a low-temperature environment; the mechanical loading system is used for bearing the seawater environment cabin and clamping the two ends of the test sample through the sample clamping system so as to apply a multi-axis dynamic mechanical load; the gas regulation and control unit is used for controlling the concentration of dissolved oxygen in the seawater environment cabin; and the multi-source monitoring module is used for collecting detection data and analyzing the detection data to obtain the corrosion rate of the test sample. The single-variable control limitation of a traditional device is broken through, and a high-fidelity experiment platform is provided for deep sea material corrosion mechanism research and equipment life evaluation.

The invention discloses a compressed air energy storage indoor simulation test device and method, and relates to the technical field of compressed air energy storage. The device comprises a triaxial pressure servo control system, a temperature control system, an air pressure control system and a multi-parameter measurement system, and can cooperatively simulate the real working environment of the underground gas storage. The triaxial system comprises a high-pressure tank body and a loading device and is used for applying triaxial stress to the rock sample; the temperature control system adjusts the temperature of the rock sample; the air pressure system comprises a high-pressure destructive experiment mode and a low-pressure precise simulation mode, the high-pressure destructive experiment mode is used for carrying out a high-pressure test and verifying the critical burial depth under different geological conditions, and the low-pressure precise simulation mode is used for researching the mechanical behavior, the damage mechanism and the leakage mechanism of the gas storage by regulating and controlling the air pressure and the flow and simulating the inflation and deflation process; the multi-parameter measurement system collects rock sample physical response data in real time. Through cooperative work of multiple systems, response characteristics of multiple support sealing systems under different conditions can be accurately reflected, and the system has remarkable simulation precision, experiment efficiency and cost advantages.

Embodiments relates to systems and methods to calculate a tire pressure scheme to be utilized by a tire of a vehicle during a trip, communicate a command to the tire pressure control apparatus, to adjust tire pressure of a tire based on the tire pressure scheme, detect a problem encountered in adjusting the tire pressure of the tire based on the tire pressure scheme, generate an alert regarding the problem via a driver assistance interface, and recommend an action to be taken to mitigate the problem.

The invention discloses a CO2-water-rock dynamic reaction simulation device and an experiment method, and relates to the technical field of geochemical water-rock reaction, the simulation device comprises a gas-liquid internal circulation system, a CO2 input and monitoring system, a temperature control system, a pressure control system and a pH monitoring system; wherein the gas-liquid internal circulation system comprises a core holder and a circulating pump, the core holder is used for fixing a sample and applying confining pressure to the sample, and the gas-liquid internal circulation system can realize continuous fluid-solid coupling physical simulation under a high-pressure condition and continuously monitor environmental pH and circulating confining pressure at the same time; the CO2 input and monitoring system can accurately measure the CO2 injection and discharge amount, and the CO2 geological storage amount in the CO2-water-rock dynamic reaction process and the rock permeability before and after the reaction are obtained. The high-temperature and high-pressure environment of the reservoir under the in-situ condition is simulated in a laboratory, the geochemical response of the CO2-water-rock system and the permeability evolution characteristic of the sample are monitored at the same time, and guidance is provided for improving the existing CO2 enhanced oil and gas exploitation and CO2 geological storage technology.

The invention provides a servo press control system and method based on a time-sensitive network, and relates to the technical field of intelligent manufacturing and industrial automation control, and the system comprises a time-sensitive network TSN which is used for providing global time synchronization and deterministic data transmission; a main controller of the multi-axis servo control unit is used for issuing a motion control instruction and a feeding and discharging control instruction through a TSN. A robot controller in the robot feeding and discharging unit is used for driving an industrial robot to execute plate taking and placing operation under the action of the feeding and discharging control instruction. The visual monitoring unit comprises an industrial camera accessed to the TSN and is used for collecting images and transmitting image data to the edge computing node through the TSN; the edge computing node is used for processing the image data to generate a compensation instruction and feeding back the compensation instruction through the TSN; and the upper monitoring system is used for subscribing real-time data published by the edge computing nodes, so that the control range of the servo pressure control system is expanded, and the convenience of data transmission and interaction is improved.

The invention provides a supercritical carbon dioxide core displacement experiment device and method, and the device comprises a supercritical carbon dioxide preparation system, a displacement reaction system, a temperature and pressure control system, a recovery metering system, and a data acquisition monitoring system. Flexible preparation of supercritical carbon dioxide can be achieved, the oil displacement process in the oil reservoir stratum environment can be accurately reduced, the experimental device is high in modification flexibility, and data collection, transmission and monitoring are efficient and high in precision. A series of experiment requirements of supercritical carbon dioxide preparation, injection oil displacement, data processing and the like can be conveniently met, the device can be conveniently subjected to experiment modification through the arrangement of the pipeline, the valve and the sensor, various experiment purposes are achieved, the utilization efficiency of the experiment device is improved, experiment operation is efficient, the carbon dioxide oil displacement and sealing experiment effects can be explored, and the experimental device is suitable for popularization and application. The method provides an experimental research thought for oil reservoir recovery efficiency, and has important guiding significance on improvement of oil and gas field recovery efficiency and development of a negative carbon technology.

The invention provides a pressure control system of an MOCVD (Metal Organic Chemical Vapor Deposition) reaction cavity and MOCVD epitaxial equipment, and the system comprises a cavity in which a reaction cavity is defined; the exhaust pipeline is communicated with the reaction cavity; the first pressure gauge is fixed on the cavity body, and the first pressure gauge is used for detecting the gas pressure in the reaction cavity; the exhaust valve is configured to control the exhaust flow through the opening degree of the valve; the vacuum pump is used for extracting gas in the reaction cavity; the mass flow controller is configured to be capable of detecting and controlling the flow of gas flowing into the reaction cavity; and the controller is configured to control the valve opening degree of the exhaust valve and / or control the gas inlet flow of the mass flow controller according to the gas pressure detected by the first pressure meter. According to the pressure control system of the MOCVD reaction chamber, the first pressure meter, the exhaust valve and the mass flow controller are arranged on the chamber body, and the gas pressure can be adjusted in real time, so that the product quality can be effectively improved.

The utility model discloses a backflow type icing wind tunnel capable of simulating a sand-containing ice crystal-containing environment, which belongs to the technical field of wind tunnels and comprises a wind tunnel body, a liquid particulate matter injection system, a solid particulate matter injection system, a phase change particulate matter injection system, a temperature control system, a pressure control system and a plurality of power systems. The wind tunnel body is sequentially provided with a stable section, a contraction section, a test section, a first expansion section and a second expansion section, and the liquid particulate matter injection system and the solid particulate matter injection system are both installed on the stable section. According to the backflow type icing wind tunnel capable of simulating the sand-containing and ice-crystal-containing environment, the content of sand and dust, the content of ice crystals and the content of liquid water in the wind tunnel body can be adjusted, and the temperature in the wind tunnel body can be adjusted, so that more complex weather can be simulated in the wind tunnel body, the accuracy of experimental data is ensured, and the experimental efficiency is improved. Therefore, the reliability and the safety of the aircraft in an extreme environment are improved, and the test efficiency is improved.

The invention relates to the technical field of intelligent forging and pressing equipment, in particular to a cold header pressure control system which comprises a pressure sensing module used for collecting dynamic pressure signals when a cold header works in real time; the system further comprises a control unit, the control unit is electrically connected with the pressure sensing module, a fuzzy PID control algorithm is adopted to conduct real-time analysis on the dynamic pressure signals based on the pressure change rate and historical abnormal working condition data, and a pressure regulation and control instruction is generated in combination with a preset pressure threshold value range. The pressure during cold heading can be intelligently adjusted and optimized according to different materials, the product quality and the machining efficiency are improved, the use safety of equipment is improved, the service life of a mold is prolonged, and the production cost is reduced.

The invention discloses a hydraulic system sealing test bench and a sealing performance test method, and belongs to the technical field of sealing performance detection, the test bench comprises a vibration device, a pressure control system, a sealing element installation device, a flow adjusting system and a micro leakage detection unit; a to-be-tested sealing element is installed in the sealing element installation device to form a sealing cavity, and the sealing cavity is communicated with the pressure control system, the flow adjusting system and the hydraulic oil tank through pipelines to form a closed hydraulic loop. The vibration device is arranged on the outer side of the sealing element mounting device and used for applying vibration loads, the pressure control system is used for providing and adjusting hydraulic pressure in the sealing cavity, the flow adjusting system is used for controlling the flowing speed and flow of a hydraulic medium, and the micro-leakage detection unit is arranged below the sealing element mounting device and used for detecting leakage of the sealing cavity. The method has the advantages of being high in test condition controllability, high in leakage detection sensitivity, wide in adaptability and high in test result engineering guidance.

The utility model provides a screen mechanism for producing activated aluminum oxide through aluminum ash recovery, and relates to the technical field of aluminum ash recovery. A plurality of grates are arranged on the bracket, a plurality of division bars are arranged between every two adjacent grates, slotted holes are formed in the side walls of the grates and used for containing the ends of the division bars, an upper bag body and a lower bag body are arranged in the slotted holes in the peripheries of the ends of the division bars, and an upper pipeline and a lower pipeline are arranged in the grates and communicated with the upper bag body and the lower bag body respectively. The upper pipeline and the lower pipeline are respectively communicated with different pressure control systems, the pressure control systems control the liquid medium to enter and exit from the upper pipeline and the lower pipeline and control the pressure of the liquid medium in the upper pipeline and the lower pipeline, and each pressure control system comprises a heater which is used for heating the liquid medium and is controlled by an automatic temperature control system. According to the utility model, self-heating can be carried out to dry blocked or attached materials, and the materials are shaken off to realize self-cleaning.

The invention provides a balloon pressure control system and method and a computer readable storage medium. The balloon pressure control system comprises a pressing machine, a balloon, a balloon catheter and a pressure expansion pump. The balloon catheter comprises a medium cavity, an outlet of the medium cavity is located in the balloon, and the pressure expansion pump comprises a microprocessor and a pumping mechanism; the pumping mechanism comprises a liquid storage bag, a peristaltic pump and a first conveying pipe which are sequentially connected, the first conveying pipe is connected with the medium cavity, and a filling medium is stored in the liquid storage bag; the method is executed by a microprocessor and comprises the steps that when the microprocessor receives a pressing signal, a pumping mechanism is controlled to pump a filling medium into a balloon through a first conveying pipe by means of a peristaltic pump according to the initial filling speed and the preset filling time, so that balloon filling is completed; and when the release signal is received, the pumping mechanism is controlled to extract the filling medium in the balloon through the first conveying pipe by the peristaltic pump according to the initial release speed and the preset release time, so that the release of the balloon is completed.

A system for transporting fluid generated by a wind turbine includes at least one wind turbine for generating electrical power, wherein the wind turbine includes a fluid producing unit configured for generating a fluid by using the generated electrical power, a fluid pipeline system coupled to the wind turbine for transporting the generated fluid, and a pressure control system coupled to the fluid pipeline system for controlling the fluid flow of the fluid in the pipeline system. The pipeline system includes a transporting pipeline and a connection pipeline, wherein the connection pipeline is coupled to the wind turbine and the connection pipeline such that the fluid is transportable from the wind turbine to the transporting pipeline via the connection pipeline.

The invention discloses a wafer transmission pressure control system and method, the system is applied to semiconductor process equipment, the system comprises a semiconductor process platform and process cavities, the semiconductor process platform comprises an equipment front-end module, a load locking cavity and a plurality of transmission cavities, the transmission cavities are used for sequentially transmitting wafers to each process cavity, and the equipment front-end module is connected with the load locking cavity. A control valve is arranged between the transmission cavity and the process cavity and used for controlling communication between the transmission cavity and the process cavity. Particle testing is carried out through the wafer transmission pressure control system, and the optimal pressure difference between the transmission cavity and the process cavity can be determined, so that the problem that by-products in the process cavity return to the transmission cavity through the transmission channel due to improper pressure and pressure difference between the transmission cavity and the process cavity can be solved; therefore, the use effect of the semiconductor process equipment is improved.

The present invention provides an ultra-high precision pneumatic force servo system and an intelligent control parameter optimization method therefor. The pneumatic force servo system is mainly composed of a double-acting air-floating frictionless cylinder and a pressure control system; the effect of friction on the control accuracy can be removed by using the air-floating frictionless cylinder; the pressure control system achieves ultra-high precision control of pressure by means of a fuzzy PI controller optimized on the basis of a novel improved particle swarm algorithm; a Gaussian variation strategy and a fuzzy control theory are integrated in the novel improved particle swarm algorithm; optimized fuzzy PI control parameters are obtained using the novel improved particle swarm algorithm and ultra-high precision pressure control of a chamber of the air-floating frictionless cylinder is performed on the basis of the parameters, such that ultra-high precision force output of the system can be achieved; the pneumatic servo system provided by the present invention can be applied to occasions where high control accuracy of force is required, expanding the application range of the pneumatic servo system.

The invention relates to the technical field of ocean engineering, and discloses a barrel type foundation air floatation dynamic deviation correction installation method and system.The method comprises the following steps that real-time attitude information of a barrel type foundation is obtained; predicting external hydrodynamic disturbance acting on the bucket foundation; generating a cooperative control instruction based on the real-time attitude information and the predicted external hydrodynamic disturbance; and according to the cooperative control instruction, an internal dynamic torque compensation system is driven to offset high-frequency dynamic inclination caused by external hydrodynamic disturbance, and a partition air pressure control system is driven to correct static or low-frequency inclination of the bucket foundation. The self-adaptive model predictive control algorithm is applied, changes of system kinetic parameters can be identified online, the control model is updated in real time, the control strategy can be kept optimal all the time, and the defect that in the prior art, a fixed parameter controller is adopted, and system reliability is high is overcome. And in the sinking process of the barrel foundation, the control performance is sharply reduced or even fails due to the change of working conditions.

The invention discloses a triaxial acoustic emission test device and method for multi-field coupling rock microbial grouting. The triaxial acoustic emission test device comprises a core triaxial pressure chamber, a freezing and thawing temperature control system, a water pressure control system, an axial loading system, an acoustic emission detection system, a microbial grouting repair device and an assembly data acquisition and control system, the test sample temperature is controlled through the freeze-thaw temperature control system, the pore water pressure is applied through the water pressure control system, the mechanical load is applied through the axial loading system, the damage signal of the test sample is monitored in real time through the acoustic emission system, the test sample is prepared through the microorganism grouting repair device, and the assembly data acquisition and control system performs integrated control and synchronous data acquisition. The test method comprises the following steps: preparing and installing a microbial remediation rock sample, applying freeze-thaw cycle, pore water pressure and axial load in sequence or in a coupling manner, monitoring the whole process by using an acoustic emission technology, and finally comprehensively analyzing a damage evolution rule and a performance degradation mechanism of the sample under the action of multi-field coupling. The device can simulate a complex environment and evaluate the microbial grouting repair effect.

The invention relates to the technical field of airplane structure strength testing, in particular to an air pressure load loading control system and method, and the system comprises a controller, a positive pressure control system and a negative pressure control system. The positive pressure control system comprises a gas source system and n positive pressure control channels; all the positive pressure control channels are respectively communicated and connected with the air source system, and all the positive pressure control channels are respectively communicated and connected with the controller; the negative pressure control system comprises a vacuum pump system and m negative pressure control channels; and all the negative pressure control channels are respectively communicated and connected with the vacuum pump system and are respectively communicated and connected with the controller. According to the technical scheme, only the number of the positive pressure control channels and the number of the negative pressure control channels need to be set according to needs, the pressurizing experiment control requirement of a plurality of test pieces and the pressure pumping experiment control requirement of the plurality of test pieces can be met at the same time, and only the PID closed-loop control technology needs to be integrated in the whole control process. And convenient, safe and reliable intelligent control can be realized through the controller.

The invention discloses a magnesium oxide grinding monitoring method and system, and particularly relates to the technical field of grinding monitoring, and the method comprises the following steps: firstly, collecting a reference spectrum generated by light reflection from the surface of a reference substrate with a target thickness; in the grinding process, the reflection spectrum of the surface of the magnesium oxide grinding base material is captured from multiple angles through a plurality of optical sensors; then, calculating a picture dust influence coefficient of each optical sensor according to the K value and the dust space-time concentration distribution; determining an angle correction factor and a picture dust influence coefficient, and comprehensively distributing a reflection spectrum weight coefficient obtained by each optical sensor; fusing and outputting the reflection spectrums acquired by the optical sensors according to the weight coefficients of the reflection spectrums acquired by the optical sensors; finally, matching the real-time spectrum with a historical spectrum library; comparing the target thickness of each region, and determining a rate deviation; the grinding pressure of different areas is dynamically adjusted through a pressure control system; and the grinding end point time of all the areas tends to be consistent.

The invention belongs to the technical field of refrigerants, and particularly relates to a visual measuring device and method for refrigerant liquid drops, and the device comprises a liquid drop sampling system, and a sampling cabin is connected with a capillary needle tube through a sampling valve, and the capillary needle tube is arranged along the gravity direction; a capillary needle tube of the high-pressure visualization system extends into an observation bin communicated with the sample injection bin; the visible windows are arranged on the opposite side walls of the observation bin, the observation platform is fixed in the observation bin and located between the visible windows and below the capillary needle tube, and the thermoelectric effect semiconductor is arranged on the observation platform; the pressure control system, the electric heating module and the semiconductor chilling plate are arranged on the sample injection bin, and the pressure micro-control unit is electrically connected with the two; the optical imaging system, the high-speed camera and the light source are arranged outside the visible window, and the computer is electrically connected with the two. Compared with the prior art, the problems that in the prior art, high-pressure sampling equipment which is high in cost and complex in operation is needed, and only the liquid drop contact angle can be measured are solved. According to the scheme, through the gravity action of the liquid working medium, sample injection in a high-pressure environment is achieved, and high-pressure sample injection equipment is not needed.

The invention discloses an intelligent preparation system and process for a composite antibacterial material with synergistic interaction of nanoparticles, and relates to the field of preparation of composite antibacterial materials. The raw material pretreatment module integrates a nano particle purification unit, a base material modification unit and an antibacterial agent dispersion unit, so that the purity and the dispersity are improved; the intelligent proportioning and mixing module consists of a five-channel metering pump, a dynamic mixer and a concentration monitoring device and is used for accurately controlling the component proportion; the reaction synthesis module comprises a constant-temperature reaction kettle, a pressure control system and an inert gas protection unit, and stable reaction is guaranteed; the performance online detection module is used for testing the antibacterial property, the mechanical property and the microstructure; the intelligent regulation and control module optimizes process parameters through an algorithm; the product post-processing module comprises a filtering unit, a drying unit and a sterile packaging unit to ensure the product quality. The antibacterial performance and stability are improved, the antibacterial aging is prolonged, energy consumption is reduced, efficient, green and intelligent preparation of the composite antibacterial material is achieved, and industrial technology upgrading is promoted.

The invention discloses an inner protective gas pressure control system and method for stainless steel pipeline welding, and relates to the technical field of welding process.The inner protective gas pressure control system comprises a data collection module used for collecting the welding angle, the welding time, the weld reinforcement and real-time air pressure parameters in the welding process; the historical modeling module is used for receiving and analyzing the welding process parameter data from the data collection module; the gas regulation control module is used for calling the gas pressure prediction model output by the historical modeling module and the collected current welding state data in real time; the feedforward and feedback fusion control module is used for outputting a disturbance prediction compensation value according to the target air pressure value; the fuzzy control module is used for generating a control correction signal for assisting air pressure adjustment; the self-learning optimization module is used for adjusting fitting parameters, disturbance evaluation strategies and fuzzy rule weights in the historical modeling module; according to the method, disturbance prediction correction can be carried out according to the welding angle change trend and the weld reinforcement error in the welding process.

The invention belongs to the technical field of pulse dust removers, and particularly relates to an intelligent pulse dust remover and a control method. The control method comprises the following parts and steps: S1, monitoring the dust emission concentration in real time through a dust concentration detection sensor, and controlling a system to correspondingly and automatically increase and decrease the rotating speed of a frequency conversion fan and the opening degree of an automatic air regulating valve according to the increase and decrease of the dust concentration; s2, dust is discharged through a frequency conversion fan after being filtered; s3, the resistance of the filter bag is monitored in real time through a pressure difference sensor, when the pressure difference reaches an ash removal threshold value, a control system is started for pulse ash removal, and the injection pressure is dynamically adjusted by adjusting an electric pressure adjusting valve according to the set pressure difference change rate; and S4, the control system automatically controls opening and closing of the star-shaped discharging valve. The system has the advantages of dynamic ash removal control, dynamic working condition adjustment, low operation energy consumption and the like.

An agricultural row unit for planting seeds in a furrow includes an opening tool that cuts a furrow in the soil to be planted, and a gauge wheel that engages the soil to control elevation. A depth control actuator applies a controllable down force to the gauge wheel, and a sidewall compaction sensor extends into sidewalls of the furrow and produces a signal representing the compaction of the soil. A controller supplies the depth control actuator with a control signal representing a down pressure set point to form a furrow having a desired depth. The controller uses the signal representing the compaction of the soil in the sidewalls to determine whether the down pressure set point should be increased or decreased, and supplies the depth control actuator with a control signal when it is determined that the down pressure set point should be increased or decreased.

The invention discloses a high-pressure injection system and method. The high-pressure injection system comprises an equipment body, an injection propelling device, a needle cylinder pipeline suite, a medicine bottle replacing device, a bubble induction sensor, a gravity sensor, a pressure sensor and a control system, wherein the injection propelling device, the needle cylinder pipeline suite, the medicine bottle replacing device, the bubble induction sensor, the gravity sensor and the pressure sensor are installed on the equipment body; wherein the medicine bottle replacing device is used for containing and automatically replacing medicine bottles; the needle cylinder pipeline suite is communicated with the needle cylinder pipeline suite through a puncture outfit, and can selectively suck liquid medicine and continuously inject multiple patients; the injection propulsion device drives a needle cylinder piston to realize precise injection; the bubble induction sensor, the gravity sensor and the pressure sensor are respectively used for monitoring pipeline bubbles, medicine bottle weight and needle cylinder pressure in real time; the control system coordinates all the components, and full-automatic execution of medicine bottle replacement, medicine liquid extraction, pipeline exhaust and injection control operation is achieved. Full automation of the injection preparation process is achieved, the radiography examination efficiency is remarkably improved, the labor intensity of medical workers is reduced, and the safety and accuracy of the injection process are ensured.

The invention discloses a pressurizing oxygen cabin pressure control method which comprises the following control steps: after an oxygen cabin door is completely closed, a compressor in a pressure control system is started along with linkage control to implement a pressurizing mode in an oxygen cabin body; in the process of pressurizing the inside of the oxygen cabin, three paths of electric ball valves in the air circulation system are started according to three pressure gears set and monitored by an oxygen cabin pressure control system to open the corresponding electric ball valves to release pressure; and when the pressure in the oxygen cabin exceeds the pressure gear in the set three-gear pressure, the corresponding gear electric ball valve is automatically started and opened to execute the pressure relief task, so that the oxygen cabin pressure in the oxygen cabin is kept in a safe and effective pressure level interval, the pressure control in the oxygen cabin is simple, convenient and effective, and the pressure control cost is low.

The invention belongs to the technical field of soft robots, and discloses a blocking variable-stiffness structure based on zigzag paper folding, a tubular driver and a planar driver. Comprising a zigzag paper folding structure, an air bag and an air pipe, the zigzag paper folding structure is formed by folding paperboard in a Z shape and arranged in the air bag, the two ends of the zigzag paper folding structure are fixed to the air bag, and the air pipe is connected with an external air pressure control system. Quick switching between a blocking state and a non-blocking state is achieved by adjusting the air pressure in the air bag, and in the non-blocking state, the structure can be freely bent and stretched; in the blocked state, inter-layer friction increases to prevent stretching while maintaining flexural freedom. The problem of coupling of stretching rigidity and bending rigidity in a traditional blocking technology is solved, and the device has the advantages of being fast in response, high in rigidity adjustment ratio, simple in structure, light in weight and the like. A tubular or planar driver can be embedded into the structure, local rigidity adjustment is achieved through air pressure control, the structure is suitable for the precise movement and complex deformation requirements of the soft robot, and the environmental adaptability and task flexibility are remarkably improved.

The invention relates to a self-adaptive engine double-duct flow test device, which comprises an air supply system A used for providing air flow in a simulated engine duct and passing through a front fan, and a duct test section C used for simulating an inner duct, an outer duct and an adjusting structure of a double-duct fan engine and carrying out a flow test between the ducts, the total pressure control system B is arranged between the air supply system A and the duct test section C; a flow matching and adjusting simulation method between the double ducts is provided, the motion law of the valve is continuously adjusted and dispersed into a plurality of steady-state working conditions for test measurement, or the motion process of the valve is dynamically measured, so that various test requirements are met. According to the invention, the flow area of the duct throat part is continuously adjustable, and the duct throat part is cooperatively matched with a duct inlet total pressure control system, so that the stability of the inlet condition of a test section is ensured, and meanwhile, the flow characteristics among multiple ducts under various different matching and adjusting working conditions are successfully reproduced; and important support is provided for deeply exploring a coupling mechanism and a flow evolution rule between the ducts.

The invention provides a fuzzy neural network PID (Proportion Integration Differentiation) pressure control method based on an improved black wing plinary algorithm, and belongs to the technical field of engineering. The technical problems of strong nonlinearity, dynamic lag and insufficient anti-interference capability in an ozone dissolving tank pipeline pressure control system are solved. According to the technical scheme, the method comprises the following steps that S1, pressure modeling is conducted on a water outlet pipeline of an ozone water tank; s2, improving the design of a black-wing optimization algorithm IBKA; s3, designing a fuzzy neural network PID controller; and S4, performing simulation experiment and performance verification on the pressure control system. The method has the beneficial effects that the dynamic response speed and the steady-state precision of pressure control are improved by improving an optimization algorithm and adjusting online parameters, and the requirement for pressure stability under the complex working condition is met.

The invention discloses a low-altitude heavy-load transportation airship and a buoyancy control method in the loading and unloading process, and belongs to the technical field of heavy-load transportation aircrafts. Comprising a bag body filled with buoyancy gas, a high-pressure air bag and an air bag which are located in the bag body, a pressure control system used for controlling the high-pressure air bag and the air bag to be inflated and deflated and a flight control system used for controlling the pressure control system to act, the density of the buoyancy gas is smaller than that of air, and the pressure control system comprises a first pressure control system and a second pressure control system; the first pressure control system controls buoyancy gas to flow into or out of the high-pressure air bag. The second pressure control system controls external air to flow into or out of the air bag. The flight control system is in signal connection with the first pressure control system and the second pressure control system. The buoyancy and gravity of the airship are adjusted by inflating and deflating the high-pressure air bag and / or the air bag, so that the problem that the airship rises rapidly due to the fact that the net buoyancy of the airship is increased sharply during cargo unloading is solved, and flight safety is guaranteed.