5937results about "Fluid-pressure actuator testing" patented technology

The invention discloses a seeding monomer seeding depth and suppression control method and a control device thereof.The method comprises the steps that control parameter data are obtained, and the control parameter data comprise a seeding mode and / or suppression / pressing parameters; determining an operation mode based on the control parameter data; when the operation mode is a downward pressing mode and a pressing mode, a pressing hydraulic cylinder and a downward pressing hydraulic cylinder are adjusted to stretch and retract in real time based on data collected by a pressing force sensor and data collected by a downward pressing force sensor, so that target pressing force and target downward pressing force are kept; and when the operation mode is a pressing / pressing cooperation mode, data collected by the pressing force sensor and the pressing force sensor are obtained at the same time, and the pressing hydraulic cylinder and the pressing hydraulic cylinder stretch out and draw back at the same time, so that the target pressing force and the target pressing force are kept. According to the scheme, on-demand switching of the pressing mode, the pressing mode and the pressing / pressing cooperation mode can be achieved, and compared with a fixed mode in the prior art, higher adaptability and flexibility are achieved.

The invention provides a digital hydraulic pump test bed and a digital hydraulic pump control performance verification method. The invention provides a digital hydraulic pump test bed. The digital hydraulic pump test bed comprises a driving module and a loading module, wherein the driving module comprises a tested hydraulic pump, a direct-current adjustable-speed motor, a plurality of couplings and a shock absorber, one ends of the couplings are connected with the tested hydraulic pump, the other ends of the couplings are connected with the direct-current adjustable-speed motor, the shock absorber is connected with the direct-current adjustable-speed motor, and the sensors are installed on the tested hydraulic pump; a plurality of pressure oil ports of the tested hydraulic pump are connected with the loading module, the loading module comprises a bridge loop and a loading loop, the plurality of pressure oil ports are respectively connected with a first series connection point and a second series connection point of the bridge loop, and a parallel connection point of the bridge loop is connected to the loading loop. The digital hydraulic pump test bed and the digital hydraulic pump control performance verification method are used for verifying the key control performance of the digital hydraulic pump and are wide in application range.

A performance testing device for the piston rod sealing assembly includes a bracket, a support apparatus, a drive apparatus and a leakage detection apparatus, where the support apparatus includes a cylinder body that is internally provided with a movable channel, and the movable channel is configured to allow a piston rod equipped with a sealing component to pass therethrough; the drive apparatus is provided on the bracket and configured to be connected with the piston rod; the leakage detection apparatus includes a limit member and an oil receiver, the limit member is provided with a detection channel and an oil channel and connected to the cylinder body, the detection channel is communicated with the movable channel and configured to allow the piston rod to pass therethrough; one end of the oil channels is communicated with the detection channel and the other end thereof is communicated with the oil receiver.

The invention discloses a hydraulic system throttling control method based on a hydraulic control one-way valve, which relates to the technical field of throttling control, and comprises the following steps of: in an initialization stage of starting a hydraulic system, setting an optimal initial throttling opening for a throttling valve based on flow data of current oil; the method comprises the following steps: performing high-frequency real-time acquisition on flow state data of oil through a sensor deployed at the upstream of a throttling area, and establishing a set of flow state data system based on a time sequence; continuously collected flow state data are divided according to time windows, and an analysis set of oil flow data is constructed. According to the method, the dynamic flowing state of oil is monitored and deeply analyzed in real time, the load state is intelligently predicted in combination with a support vector machine model, and the opening degree of the throttling valve is adjusted in real time; the problems that in the prior art, response of a throttling control strategy to a high-load working condition is delayed, and oil temperature rise and viscosity abnormal reduction are caused by serious local pressure loss of a throttling area are effectively solved.

The invention relates to a split type electro-hydraulic direct-driven non-retractable fin stabilizer hydraulic system which comprises a hydraulic unit and an actuating mechanism which are independently arranged, and the actuating mechanism comprises fin rotating oil cylinders which are symmetrically arranged; a bidirectional hydraulic pump driven by a servo motor forms a closed fin rotating loop; the bidirectional hydraulic pump driven by the servo motor, the hydraulic unit and the actuating mechanism form an electro-hydraulic direct-drive fin stabilizer device; the control loop is composed of a gyroscope, a controller and an executing mechanism, and the gyroscope detects the rolling angular velocity of the ship and generates a fin rotating instruction signal; the controller compares the instruction signal with the fin angle feedback signal and outputs a servo motor rotating speed instruction; the servo driver controls the servo motor to rotate forwards and backwards, the bidirectional hydraulic pump is driven to adjust the displacement of the fin rotating oil cylinder, and therefore the fin is driven to rotate. A valve control or pump control type hydraulic system adopted by a traditional fin stabilizer is replaced, integrated optimization, light weight, high efficiency, high reliability and low noise of the fin stabilizer hydraulic system are achieved, and the occupied space of equipment is reduced.

The invention discloses an automatic air cylinder clamping system and method, and belongs to the technical field of air cylinder clamping, and the system comprises a map drawing module which is used for drawing a three-dimensional clamping force distribution map; the risk prediction module is used for synchronously predicting a deformation deviation risk value in the clamping process; the model calculation module is used for generating a dynamic attenuation coefficient; and the air cylinder adjusting module is used for dynamically adjusting the opening degree of a multi-stage cushion valve and the servo pressurization rate of the automatic air cylinder set through a self-adaptive control strategy till the clamping force error is stabilized within a preset threshold value. The technical problems that in the automatic air cylinder clamping process, due to environment interference and system errors, the clamping force is unstable, and the workpiece clamping precision is low are solved, and the technical effects that the clamping force stability is improved through dynamic compensation and self-adaptive adjustment, the deformation risk is reduced, and the clamping precision is improved are achieved.

The invention discloses a hydraulic loading system for a semi-physical simulation platform of an excavator. The hydraulic loading system comprises a loading pump set, a confluence switching valve set, a movable arm linkage loading valve set, a bucket rod linkage loading valve set, a bucket linkage loading valve set, a rotation linkage loading valve set, a flow detection assembly, a pressure detection assembly, a multi-way valve and an excavator power unit. Oil inlet ports of all the multi-way valves provide oil inlet through an excavator power unit, flow of oil return ports of a movable arm link, a bucket rod link and a bucket link provides an oil source through a loading pump set, loading valve sets simulate loading load pressure, and the oil return amount and the oil return back pressure are controlled through speed regulating valves of all the loading valve sets. And the rotary unit controls the oil return quantity and simulates the rotary load through a rotary loading valve group. Multi-pump-set loading is adopted, the loading flow range is large, universality is high, an execution oil cylinder and an execution motor do not need to be installed and replaced, and operability is high; the oil inlet and return flow and pressure of the movable arm unit, the bucket rod unit and the bucket unit are independently loaded and are not limited by the area ratio of two cavities of an oil cylinder.

The invention discloses a hydraulic system numerical simulation and parameter optimization design method and device, and relates to the technical field of hydraulic system parameter optimization. Comprising the following steps: collecting geometric parameters and material characteristic parameters of the hydraulic system, and establishing a geometric structure model and a finite element analysis model; performing finite element analysis, applying different load conditions to obtain working parameters, and recording effective stress of the hydraulic pump blade; the average stress and the working time are combined to represent the blade abrasion degree, and an abrasion influence correction factor is calculated; working environment parameters are collected to calculate environment correction factors, and vibration amplitude is obtained to calculate load dynamic adjustment factors; and finally, the working parameters are dynamically corrected based on the correction factors, and the hydraulic system is controlled through optimization design. It is ensured that the hydraulic system keeps an efficient and stable working state in the long-term using process, the adaptive capacity of the system under different working conditions is further improved, and therefore the abrasion speed of elements is decreased, and the service life of the system is prolonged.

The invention discloses a reciprocating sealing test device of an aviation hydraulic actuator and a verification method, and belongs to the field of aviation airborne equipment test and verification. Comprising an end cover, a nut, an outer cylinder, an inner hexagon screw, a pipe joint, a limiting block, a partition baffle, a piston rod, a lining and the like, and all the parts are assembled to form the complete component-level sealing test device. Performing sealing element inspection before and after an experiment on the to-be-tested sealing element, and inspecting the quality of the movable surface of the test device; then the sealing element is assembled on a test device, and installation technology adaptability inspection is carried out; the test device is installed on a test bench, and sealing characteristic tests including a running-in test, a normal-temperature, high-temperature and low-temperature performance test, a low-pressure static test and a high-pressure static test are carried out; performing environment adaptability tests including low-temperature storage, low-temperature work, high-temperature storage, high-temperature work and temperature shock; sealing life durability tests including normal-temperature, high-temperature and low-temperature motion durability tests are completed; and performing decomposition inspection after the test is finished.

The invention discloses a hydraulic control system, which belongs to the field of hydraulic control, and comprises a power execution module, a control regulation module and a sensing feedback module, in the slurry manufacturing stage, data are collected through a sensor, the abnormal condition of the slurry temperature is detected to judge whether the slurry temperature is adjusted or not, and based on the real-time slurry viscosity, the rotating speed of a stirring shaft is adjusted in a self-adaptive mode by adjusting the hydraulic flow of a hydraulic motor of a stirring driver; acquiring driver data to monitor a control instruction implementation result, performing abnormality evaluation analysis on a driver through threshold judgment and abnormality score calculation, and generating an updated driver control signal after a driver instruction regeneration signal is received; monitoring abnormal conditions of data acquired by various deployed sensors, monitoring abnormal data of the sensors, and monitoring duration of the abnormal data so as to carry out abnormal early warning and generate abnormal early warning information; the problem that the slurry temperature of die-casting equipment under hydraulic control is difficult to adaptively adjust and disturb is solved.

The utility model relates to the technical field of hydraulic stations, and discloses an automatic temperature control system for a hydraulic station, which comprises an air-cooled radiator for radiating hydraulic oil, an oil inlet pipe and an oil outlet pipe for connecting the air-cooled radiator with the hydraulic station, a controller, a temperature sensor A, a temperature sensor B and an alarm, the temperature sensor monitors the temperature of hydraulic oil entering and exiting the air-cooled radiator in real time, and the controller adjusts the heat dissipation effect of the air-cooled radiator according to monitored data so as to maintain the oil temperature within a suitable range. And if the oil temperature exceeds a set threshold value, the controller can activate the alarm to prompt an operator to intervene. The system can monitor the oil temperature in real time and quickly respond to temperature changes, and it is guaranteed that the performance of hydraulic oil is in the optimal state all the time.

The invention belongs to the field of hydraulic transmission system design, and discloses a hydraulic transmission system protection method and system.The protection method comprises the steps that onboard state signals, flight control system state signals and first hydraulic pressure and second hydraulic pressure of each hydraulic pipeline in a hydraulic transmission system are collected in real time; according to the onboard state signal, an electric pump closing instruction and a hydraulic pressure logic judgment instruction are output through an onboard state threshold value and first electric pump control logic, and an electric pump connected to a hydraulic pipeline is closed according to the electric pump closing instruction; and acquiring a flight control system state signal, first hydraulic pressure and second hydraulic pressure according to the hydraulic pressure logic judgment instruction, and automatically controlling the electric pump by adopting a second electric pump control mechanism and a hydraulic pipeline protection mechanism through a low-pressure threshold value and a pressure safety threshold value. According to the invention, the starting of each electric pump can be automatically controlled, a hydraulic passage can be protected through a plurality of mechanisms, and the flight safety can be improved.

The invention belongs to the field of electromechanical control, and discloses a redundancy control method and system for an electric pump and a transmission system.The redundancy control method comprises the steps that onboard state signals, flight control system state signals and first hydraulic pressure and second hydraulic pressure of each hydraulic sub-system in a hydraulic system are collected in real time; an electric pump closing instruction and a hydraulic pressure logic judgment instruction are output through an on-board state threshold value and first electric pump control logic according to the on-board state signal, and the electric pump is closed according to the electric pump closing instruction; and a flight control system state signal, the first hydraulic pressure and the second hydraulic pressure are obtained, and each electric pump is automatically controlled through a low-pressure threshold value and a pressure safety threshold value by adopting second electric pump control logic, a hydraulic pipeline protection mechanism and an electric pump protection mechanism. According to the invention, the starting of each electric pump can be automatically controlled, a hydraulic passage can be protected, and the flight safety is ensured.

The invention discloses a hydraulic system and equipment for testing a hydraulic valve, and belongs to the technical field of hydraulic systems. An oil inlet of the hydraulic pump is connected with the oil tank; the tested valve comprises a plurality of inlets and outlets; one oil way of an oil outlet of the hydraulic pump is connected with the pressure regulating oil way, and the other oil way is connected with an oil inlet of the cartridge check valve; the pressure adjusting oil way adjusts the oil outlet pressure of the hydraulic pump; one oil way inserted into the oil outlet of the one-way valve is connected with a control oil way; the control oil way is used for adjusting the on-off and pressure of control oil of the tested valve; the other oil way is connected with an oil inlet of a proportional speed regulating valve, an oil outlet of the proportional speed regulating valve is connected with an oil inlet of a plug-in mounting type direction valve group, an oil outlet of the plug-in mounting type direction valve group is connected with an inlet of a tested valve, and a control cavity of the plug-in mounting type direction valve group is connected with an electromagnetic directional valve; an outlet of the tested valve is connected with the hydraulic cylinder and the throttling oil way. The hydraulic valve testing device can be suitable for testing high-pressure environments of various types of hydraulic valves.

The invention discloses an extruder hydraulic automatic control method based on machine learning, and relates to the technical field of machine learning. The method comprises the following steps: collecting training data to establish a damping coefficient prediction model and a friction coefficient prediction model; hydraulic pressure data, hydraulic flow data and component movement data are collected; establishing a pressure-load control model, a flow-speed control model and a displacement-speed control model; collecting an initial pressure value and real-time operation characteristic data; acquiring a real-time friction coefficient, a real-time damping coefficient, a real-time output pressure value, a real-time output flow value, a real-time displacement change value and a real-time speed change value; calculating a real-time pressure compensation value, a real-time flow compensation value, a real-time displacement adjustment value and a real-time speed adjustment value; and pressure compensation and displacement and speed regulation and control are carried out. According to the method, multiple machine learning models are established, and hydraulic pressure is compensated and comprehensively regulated, so that accurate, efficient and intelligent control of the hydraulic system is realized.

The invention designs a linear heave compensation device based on a composite cylinder, belongs to the technical field of ocean engineering equipment, adopts a heave compensation scheme of a double-composite-cylinder structure comprising a heave compensation execution cylinder and an integrated control cylinder, and is provided with a plurality of functional cavities; the working gas cylinder group is communicated with a rod cavity of the heave compensation execution cylinder through the gas-liquid converter to provide passive compensation force for the heave compensation execution cylinder; oil is alternately supplied to inner cavities of the two composite cylinders in a control mode of direct driving of the two-way variable pump, and active compensation force is provided for the heave compensation execution cylinder; for an underwater high-pressure environment, deepwater pressure acts on a piston rod of the integrated control cylinder and a piston rod of the heave compensation execution cylinder at the same time, and the water depth compensation function is achieved through offset of internal pressure of the double cylinders. Multiple functions such as passive compensation, active compensation and water depth compensation are achieved, multiple working condition operations such as water, splash zone passing and landing can be continuously completed, the two-way variable pump is adopted to directly drive the compensation execution cylinder, the response speed and the control precision are improved, and the beneficial effects of being low in energy consumption, compact in structure, integrated in multiple functions and the like are achieved.

The invention relates to the technical field of hydraulic servo control systems, and discloses a high-precision hydraulic servo control system and a fault diagnosis method thereof.The hydraulic servo control system comprises a system control module, a hydraulic execution module, a data feedback module, an automatic compensation module and a feedback control module; the system control module is used for receiving and processing an input signal and outputting a control instruction; the hydraulic execution module is used for generating a corresponding hydraulic action according to the control instruction; the data feedback module is used for detecting the actual position and pressure of the hydraulic execution module and transmitting a feedback signal to the automatic compensation module; the automatic compensation module is used for eliminating system errors through a compensation algorithm; the feedback control module is used for comparing the difference between the system output and a set target, generating a deviation signal, and adjusting the input of the system by using the signal, so that the system output is closer to the set target; through the system, the control precision and stability of the hydraulic servo control system can be improved.

The invention discloses a control method of a flap unloading platform, which is applied to a hydraulic control system of the flap unloading platform, and comprises the following steps: acquiring a starting signal, and enabling a power driving branch based on the starting signal; the system pressure of a hydraulic control system of the turning plate unloading platform is controlled by the power driving branch to be gradually increased; in response to the fact that the system pressure is equal to the preset value, the power-on state of the main electromagnetic valve is changed, the first proportional throttle valve and the second proportional throttle valve are adjusted based on the second working state of the main electromagnetic valve, the first lifting oil cylinder and the second lifting oil cylinder are controlled to act, and the turning plate unloading platform is driven to rotate; and in response to rotation of the flap unloading platform to the preset angle, the power-on state of the main electromagnetic valve is changed, so that the flap unloading platform is controlled to stop rotating based on the first working state of the main electromagnetic valve. By controlling the first proportional throttle valve and the second proportional throttle valve which are independent, independent control over the first lifting oil cylinder and the second lifting oil cylinder is achieved so that synchronous action can be achieved.

The invention discloses a fault diagnosis method of a hydraulic system and an intelligent early warning device, and relates to the technical field of hydraulic systems.The fault diagnosis method comprises the steps that an operation model of the hydraulic system is established according to ideal environment parameters, and standard operation parameters are imported into the operation model to obtain ideal performance coefficients of the hydraulic system; calculating an equipment operation deviation coefficient according to the ideal environment parameters, presetting a system operation early warning threshold value according to the equipment operation deviation coefficient, establishing an environment prediction model, integrating multiple groups of predicted environment change data to obtain an environment deviation oscillogram, and further delimiting a normal monitoring time period, a peak monitoring time period and a key monitoring time period; a corresponding monitoring frequency band is set, early warning judgment is performed according to a deviation value of an actual performance coefficient and an ideal performance coefficient of equipment, and fault prediction is realized before the hydraulic system breaks down due to interference of environmental factors in combination with interference influence of the environmental factors on operation of the hydraulic system. Economic losses caused by the fact that problems can only be found after faults occur are avoided.

The invention discloses a fluid pressure monitoring method and system, and relates to the technical field of pressure monitoring, and the method comprises the steps: determining a hydraulic circulation path, configuring a pressure sensing module, carrying out the real-time pressure monitoring of a first hydraulic oil path, a second hydraulic oil path and a third hydraulic oil path, and generating pressure distribution prediction information through the analysis of a hydraulic control module; through comparison of monitoring data and prediction information, an abnormal pressure distribution path and characteristics are accurately identified, abnormity judgment and dynamic correction are performed based on a reversible abnormity correction model, a correction hydraulic control signal is generated, and closed-loop control is implemented after the correction hydraulic control signal is input into a hydraulic control module. The method solves the technical problem that an existing hydraulic system is difficult to accurately recognize abnormal pressure distribution and carry out real-time dynamic correction under complex working conditions, and the system operation stability is affected, and achieves the purposes of accurately recognizing abnormal pressure distribution and carrying out real-time dynamic correction through multi-path pressure monitoring and a reversible abnormal correction model, and improving the system operation stability. And the operation stability of the system is improved.

The invention discloses a hydraulic system intelligent fault diagnosis method based on a diffusion model data enhancement framework, and the method comprises the following steps: firstly providing a diffusion model-based data enhancement framework, carrying out the fault simulation of a hydraulic system through a simulation model, converting a time domain signal into a gray image, and achieving the data enhancement through a diffusion model; carrying out quantitative evaluation on the quality of the generated image, and constructing an enhanced hydraulic system fault data set; based on the proposed framework, a dual-domain adversarial neural network model fused with an attention mechanism is proposed, the weight of a loss function of two domain discriminators is adjusted so as to realize global and local feature adaptive fusion optimization, adversarial training is realized through a gradient inversion layer, and the adaptive fusion optimization of global and local features is realized. Experimental fault state data serve as a test set to be input into a model for fault diagnosis, and the superiority of the method on indexes such as accuracy is verified through comparison of traditional models such as DANN and CNN. In addition, the method is simple and easy to implement, and is suitable for intelligent fault diagnosis of the hydraulic system under the zero sample condition.

The invention discloses a hydraulic hoist performance monitoring and analysis method and system based on time-frequency analysis, and relates to the technical field of hydraulic system state monitoring and fault diagnosis, and the method comprises the steps: carrying out the data collection of performance parameters through an intelligent sensor network under different operation states of a hydraulic hoist, and adjusting the data collection frequency and type; processing the collected data through a time-frequency analysis technology to reduce information loss and separate inherent modes in the signals, and extracting time-frequency features; performing potential performance degradation trend analysis on the time-frequency characteristics according to a failure development rule and failure physics; and identifying a fault diffusion trend according to a result of the potential performance degradation trend analysis and a monitoring result of temperature and vibration. Through the intelligent sensor network and the time-frequency analysis technology, early recognition and early warning of potential faults of the hydraulic hoist are achieved, the accuracy and comprehensiveness of fault diagnosis are improved, the fault response speed is optimized, and stable operation of the system is effectively guaranteed.

The invention discloses a double-variable power source hydraulic system of a movable arm of an electric loader and a control method, and belongs to the technical field of energy conservation of electric engineering machinery. The hydraulic system is structurally characterized in that a permanent magnet synchronous servo motor and an electro-hydraulic proportional variable device form a double-variable power source direct drive arm hydraulic cylinder; the one-way valve achieves oil cylinder and motor oil supplementing and flow reappearing functions according to the working condition of a hydraulic cylinder, the direct-acting overflow valve achieves overflow protection of a hydraulic system, and the two-position two-way electromagnetic directional valve achieves the pressure maintaining function of the hydraulic cylinder. According to the control method of the hydraulic system configuration, an upper computer outputs a target instruction to a double-variable parameter optimization controller, then the double-variable parameter optimization controller outputs an optimization rotating speed or displacement signal to a motor pump set, and a pump outlet pressure sensor feeds back a pressure signal to achieve a pressure closed loop. The energy recovery function can be effectively achieved in the aspect of configuration, the energy efficiency characteristic of a power source can be greatly improved in the aspect of a control method, and the endurance time of the electric loader is effectively prolonged.

The invention belongs to the field of airborne electromechanics, and discloses a hydraulic mechanism heterogeneous control method and system.The method comprises the steps that hydraulic systems are divided into two groups, and on-board state signals, flight control system state signals and first hydraulic pressure and second hydraulic pressure of sub hydraulic systems are collected; giving an on-board state threshold value, a low-pressure threshold value, a hydraulic safety threshold value and a sub-hydraulic system relation table; starting and stopping automatic control is conducted on the electric pumps in the first group through the established first control logic architecture according to the data; and the electric pumps in the second group are automatically controlled to start and stop by adopting the constructed second control logic architecture through the data. The system comprises a grouping module, a control logic construction module and two control units, wherein each control unit comprises an acquisition module, a data scheduling module, a staggered starting module, an anti-overvoltage protection module and an anti-error working module. All the electric pumps are controlled through two heterogeneous logic architectures, and the control precision and safety are improved.

The invention relates to the technical field of hydraulic control, and provides a pump-controlled semi-active ship heave compensation hydraulic system and a control method thereof.The system comprises an active compensation hydraulic module, a passive compensation hydraulic module, a sensor module, a controller and a motion sensor; the passive compensation hydraulic module comprises a nitrogen cylinder unit, an energy accumulator unit, a gas-liquid converter, a seventh electromagnetic directional valve, a fourth electromagnetic directional valve and a passive compensation asymmetric hydraulic cylinder; the active compensation hydraulic module comprises a third energy accumulator, a servo motor, a two-way quantitative hydraulic pump, a first one-way valve, a second one-way valve, an active compensation asymmetric hydraulic cylinder, a first electromagnetic reversing valve, a second electromagnetic reversing valve and a third electromagnetic reversing valve. According to the invention, passive compensation and active compensation are fused, so that the compensation precision and efficiency are greatly improved; and an electro-hydraulic servo pump control mode is adopted, so that the advantage of high control precision of a valve control mode is reserved, and the stability is also improved.

The invention relates to the technical field of response time testing of electro-hydraulic proportional valves, and discloses a response time testing method and system of an electro-hydraulic proportional valve, and the method comprises the steps: collecting multi-point pressure, step response, pipeline length and medium parameters, and unifying the time reference to obtain an original pressure sequence; constructing an inverse filter spectrum to remove damping interference so as to recover a sharp peak value; lagging offset is calculated according to pipeline and medium parameters, time delay compensation is carried out, and an alignment sequence is obtained; intercepting a non-stationary segment to eliminate residual delay deviation; constructing a response dynamic data set, extracting harmonic frequency domain representation, and reconstructing a pressure sequence through inverse transformation and superposition of compensation factors; and calculating a deviation integral quantity, adjusting a dynamic compensation parameter, performing weighted correction, and outputting an optimized reconstruction response sequence. According to the method, accurate reconstruction of the real pressure response of the proportional valve can be realized, so that the accuracy and the reliability of response time testing are improved.

The invention relates to an energy accumulator durability test method and system, and the system comprises an extreme working condition simulation module which can achieve high-voltage, wide-temperature-range and high-frequency dynamic loading; the multi-sensor monitoring network integrates a fiber bragg grating strain sensor, a three-axis acceleration sensor and an acoustic emission sensor to realize collaborative monitoring of strain, vibration and microcracks; the intelligent control and energy recovery module is combined with a fuzzy PID and reinforcement learning algorithm, a magnetorheological fluid generator and a super capacitor bank, so that the control precision and the energy utilization rate are improved; and the data analysis and life evaluation platform accurately predicts the residual life by using an improved Bayesian network model and a real-time health index calculation module. According to the test method, a loading mode is dynamically adjusted through a real-time health index, an energy recovery strategy is optimized, and life early warning is triggered. The invention breaks through the limitation of the traditional test and provides an integrated solution.

The invention provides an underground coal mine air and water pumping switching electro-hydraulic control system and method, the electro-hydraulic control system comprises an air supply control module, a water supply control module, a negative pressure control module and an oil supply module, and the method adopts a remote control system to control the underground coal mine air and water pumping switching electro-hydraulic control system. According to the underground coal mine air and water pumping switching electro-hydraulic control system, air and water pumping electric control rapid opening and closing and rapid switching of different functions are achieved, the automation degree of air and water pumping switching is improved, and the air and water pumping switching time is shortened; and meanwhile, when dangerous working conditions that gas accumulation exceeds the limit due to hole blocking behind the drill hole or carbon monoxide gas appears in the drill hole and the like, rapid and automatic response processing can be achieved. The air and water pumping conversion efficiency is improved, the labor intensity of workers is relieved, and key technical support is provided for coal mine underground automatic drilling whole-process operation.

The invention relates to a high-precision hydraulic charging regulation and control method and system based on a PID and MPC combined algorithm, and the method comprises the steps: collecting a pulse pressure waveform borne by a pressure-bearing part under a target working condition, and collecting a corresponding relation between a control instruction of the opening degree of a regulating valve and the pulse pressure waveform, constructing a pulse pressure waveform library to update a target waveform of the target working condition; creating a state space model to update dynamic characteristics of the hydraulic charging system, dynamically optimizing pre-regulated first-step control input through an MPC algorithm according to the dynamic characteristics, and updating a real waveform tracking target waveform of prediction output in a rolling manner until prediction similarity meets a set threshold value of the target waveform; and in response to the condition that the predicted similarity meets a set threshold value, selecting a PID algorithm to perform feedback adjustment and dynamic compensation on the control input of the real waveform, and outputting target control input simulating the target waveform under the target working condition. The precision, efficiency and flexibility of regulation and control of the hydraulic filling system can be improved.

The invention relates to the technical field of ship hydraulic monitoring, and discloses a marine ship hydraulic oil cylinder state monitoring and sealing performance early warning system. A multi-source sensing data acquisition module of the system synchronously obtains multi-dimensional time sequence operation data of an oil cylinder through a vibration sensor, a pressure sensor and a temperature sensor; the data preprocessing fusion module is used for carrying out noise suppression, timestamp alignment and multi-modal fusion on the data to generate a standardized oil cylinder state feature sequence; the sealing characteristic depth extraction module is used for analyzing sealing cavity pressure fluctuation, piston rod displacement oscillation and sealing piece deformation trend characteristics from the characteristic sequence; the multi-scale state evaluation module is used for calculating a sealing performance degradation gradient and a dynamic operation stability coefficient according to the characteristics; and the early warning decision generation module is used for generating a sealing failure risk level and an early warning control instruction based on the calculation result. According to the system, stable operation of the oil cylinder is guaranteed, and the maintenance cost and the safety risk are reduced.