32results about How to "Suppress shock" patented technology

The invention discloses an avalanche energy test circuit and a test method for a power device, and the test circuit can inhibit the avalanche energy from being tested after the avalanche of a to-be-tested device is finished on the premise that the avalanche energy test of an existing non-clamping inductive switch test circuit is realized. Current and voltage oscillation is caused by charging and discharging between an inductor and a stray capacitor of a to-be-tested device. Imprecise avalanche energy testing caused by loss of the to-be-tested device due to current and voltage oscillation is avoided, and the phenomenon that the to-be-tested device is mistakenly switched on due to gate-source oscillation caused by drain-source oscillation of the to-be-tested device is avoided. Through the constant current source circuit, after avalanche of the to-be-tested device is finished, a temperature-sensitive electrical parameter method is adopted to test a cooling curve and heat dissipation time of the to-be-tested device. According to the avalanche energy test circuit and test method of the power device, on the basis of realizing accurate measurement of monopulse avalanche energy, the optimal duty ratio required during repeated pulse avalanche energy test can be calculated, and the accuracy of the repeated pulse avalanche energy test is improved.

The invention discloses a finite volume convergence acceleration method and device for a grid frequency domain electromagnetic field and a medium, and belongs to the field of calculation of electromagnetic frequency domain numerical values, and the method comprises the steps: carrying out the iterative solution of a Maxwell equation set frequency domain electromagnetic field based on virtual time advance and space flux residual splitting calculation and correction; performing steady virtual time step circulation on the simulation model until convergence is finished; in each virtual time iteration process, space flux calculation and correction and implicit iterative solution calculation are carried out on each grid block grid and each grid unit in sequence, and a next-level virtual time iteration step number conservation electromagnetic field numerical value is updated; and finally, outputting real part and imaginary part spatial distribution of the electromagnetic field, and outputting surface induced current and radar cross section spatial distribution data. According to the method, the problem of large-scale electromagnetic scattering of any complex-shape and high-frequency electrically large-size target can be solved.

The application provides a semiconductor production business process construction method and system based on analysis node feedback self-optimization, which comprises the following steps: constructing an execution link of a business process based on basic information of a business scenario and preset basic function nodes, wherein the basic function nodes at least include business nodes and analysis nodes; executing the business process according to the execution link; when the analysis node is executed, collecting current associated data and obtaining corresponding historical associated data, wherein the current associated data and the historical associated data both include control parameters and corresponding output parameters; fitting the historical associated data by using a preset regression algorithm model, obtaining a model update weight coefficient, and calculating a fluctuation index; determining a preset threshold interval to which the fluctuation index belongs, and if the fluctuation index belongs to a preset allowed update interval, storing the current associated data into a historical database and saving the model update weight coefficient. The application can improve the adaptability and continuous optimization capability of the business process to a dynamic environment.

This invention discloses a time-delay-resistant and energy-saving motion control method and system for a flat-type all-wheel-drive AUV. The invention includes: constructing a six-degree-of-freedom hydrodynamic model of the AUV based on submarine maneuverability theory; identifying the setpoint pure time delay and rotational acceleration characteristics of the propeller through multi-condition testing, and constructing a nonlinear propeller dynamic model including a pure time delay element and a nonlinear rotational speed dynamic response model; constructing a composite control architecture integrating a dual-loop PID controller, a Smith predictor, and a model reference adaptive controller (MRAC); using the Smith predictor to perform explicit time delay compensation for the vertical plane motion subsystem, and using MRAC to update the adaptive gain online to compensate for model mismatch. This invention effectively suppresses high-frequency pitch angle jitter, reduces ineffective commutation movements and energy consumption of the propeller, and significantly improves the high-speed operational stability and endurance of the flat-type AUV.

The invention belongs to the field of hypersonic active flow control, and discloses a drag reduction and heat protection system and method for a hypersonic aircraft, and the method combines two active flow control methods of energy deposition and magnetofluid flow control. The excellent drag reduction characteristic of energy deposition can bring a good drag reduction effect to an aircraft, meanwhile, energy deposition can serve as an auxiliary ionization technology, and the magnetic control effect of magnetic fluid flow control is improved by improving the fluid conductivity; due to the outstanding thermal protection performance of magnetic fluid flow control, an excellent thermal protection effect is brought to the aircraft after heat flow increase in a part of time periods caused by the energy deposition process is treated; meanwhile, the problems of resistance impact and oscillation caused by pulse energy deposition are fully inhibited under the action of the magnetic field Lorentz force; by the adoption of the method, a better hypersonic speed drag reduction and heat protection effect is achieved, the resistance borne by the hypersonic speed aircraft can be effectively reduced, the heat protection capacity of the aircraft is improved, and the method has wide application prospects.

The utility model discloses degradable polyester knitted fabric conveying equipment which comprises a bottom shell, a conveying frame, a supporting plate, stand columns and a buffering assembly, the buffering assembly is arranged in an inner cavity of the bottom shell, the stand columns are fixed to the two sides of the conveying frame, and the conveying frame is located at the upper end of the bottom shell. The fabric transferring and conveying device has the advantages that firstly, fabric needing to be transferred and conveyed is sequentially placed in the conveying frame, then the fabric is transferred through cooperation of the push handle, the push rod and the universal wheels, and acting force generated by jolting during conveying of the conveying frame is transmitted to the supporting plate through the stand columns; the supporting plate transmits acting force to the composite spring, the damping block and the buffer column in sequence, the acting force applied above can be counteracted and absorbed through the counter-acting force of the composite spring, and meanwhile the composite spring has the advantages of being higher in loading capacity and large in deformation, better in damping and noise reduction effect, stable in work, short in resonance interval and the like. And the acting force applied from the upper part is counteracted and absorbed again, so that the conveying stability of the conveying frame is improved.

The application discloses a multi-period DBR super-radiation light-emitting diode structure with an ultra-wide spectrum width, wherein the upper surface of a P face electrode is divided into four areas, which are a light-emitting end ridge, an active multi-mode interference device, a plurality of non-light-emitting end ridges, a plurality of ridges with different period DBRs and an optical absorption area. The application effectively clamps the gain center wavelength through the multi-DBR structure, so that the center wavelength of the light emitted by the device is different, and then the problem that the spectrum is narrowed due to the fact that the photons close to the center gain wavelength are amplified more and the photons far away from the center gain wavelength are amplified less when the current is increased is effectively suppressed, so that the spectrum width of the device is effectively widened. The tilted ridge structure is adopted, the wide-spectrum antireflection film with a reflectivity less than 2% is deposited on the front and rear cavity surfaces, and the optical absorption area is formed on the non-light-emitting end of the device, so that the F-P oscillation is effectively suppressed through the above three methods, and the emitted light is ensured to be super-radiation light.

The present invention discloses a seven-color lamp control circuit, including a switch power module, a battery module and a control module, wherein the battery module is connected to the switch power module, the switch power module and the battery module are both connected to the control module, the control module is connected to the LED four-color lamp module, and the control module includes a B1 switch, a voltage stabilizer, a filter circuit, an MCU, a Q1 transistor, a Q2 transistor, a Q3 transistor and a Q4 transistor, four bias resistors and a B2 switch. The present invention also discloses a control method for controlling the conversion of seven colors by using an MCU to control the occupancy ratio of the four-color lamp module PWM, wherein the control method is simpler and has a good lighting effect.

The utility model relates to the technical field of automobile shock absorber damping valve structures, and discloses an automobile shock absorber damping valve structure convenient to install, which comprises a first support connector, a fixed upper support is fixedly installed at the top of the first support connector close to the center, and a damping valve upper shell is fixedly installed at the bottom of the first support connector. An upper shell groove is formed in the damping valve upper shell, a damping valve lower shell is movably connected to the position, close to the interior of the upper shell groove, of the interior of the upper shell groove, a second supporting connector is fixedly installed at the bottom of the damping valve lower shell, and telescopic damping supporting columns are movably connected to the positions, close to one side, of the front face of a second supporting connecting plate in an axial symmetry mode; limiting resisting columns are fixedly installed on the portions, close to the tops, of the front faces of the telescopic shock absorption supporting columns, and by arranging the telescopic shock absorption supporting columns, equipment can be fixed, parts can conveniently support the equipment, stable shock absorption is achieved, equipment driving is facilitated, and the shock absorption effect is conveniently achieved.

The invention discloses a converter circuit for suppressing output voltage spikes. The converter circuit comprises a transformer module, an input module, a rectification output module, a first capacitive suppression module and a second capacitive suppression module, wherein the input module is arranged on a primary winding of the transformer module; the rectification output module, the first capacitive suppression module and the second capacitive suppression module are arranged on a secondary winding of the transformer module; the first capacitive suppression module is bridged at the two ends of a first path inductor, and the first path inductor is located between the first end of the secondary winding and the first end of the rectification output module; the second capacitive suppression module is bridged at the two ends of a second path inductor, and the second path inductor is located between the second end of the secondary winding and the second end of the rectification output module; the capacitive suppression module only comprises a capacitor. According to the invention, the junction capacitance parasitic oscillation in the turn-on and turn-off processes of the rectification device in the output rectification module can be suppressed, and the output voltage spike of the output rectification module can be greatly reduced, so that the voltage stress of the output rectification module is reduced, and the circuit stability is improved.

The application discloses a kind of pneumatic-tyre pantograph pantograph contact force compensation control method and device, the device includes: front position detection module, control module, drive module and pressure feedback module;Front position detection module includes front position contactor;Front position contactor is set to the front side of pantograph;The contact force between front position contactor and catenary is same with the contact force between pantograph and catenary;Control module is used to obtain bow net contact force;Control module calculates the target pressure value required in air bag according to bow net contact force;Control module is used to obtain the actual pressure value in air bag;Control module is also used to output proportional control signal to drive module according to target pressure value and actual pressure value;Drive module is used to control the opening of the electric control proportional valve of air bag, so that the pressure value in air bag tends to target pressure value.The technical scheme provided by the application is to realize accurate monitoring and compensation control to bow net contact force.

The application discloses a control method of a propelling system of an extrusion rocket engine, which comprises steps S1-S8. The application pre-plans nitrogen pressurization timing, simultaneously returns combustion chamber temperature, storage tank pressure, nitrogen cylinder pressure and thrust multidimensional data to a nitrogen pressurization timing control module, dynamically updates a next period pre-pressurization starting moment, forms a whole-process millisecond-level closed-loop iterative control, solves the problems of large starting pressurization impact and thrust peak overshoot of a traditional fixed timing, and adapts to multiple nonlinear disturbances such as nitrogen pressure attenuation and pipeline pressure drop changes. The system does not need an accurate system mathematical model, has low parameter debugging workload, and is suitable for multiple types of extrusion propelling systems. The application adopts a barycenter method to output continuous high-precision regulating quantity, simultaneously uniformly limits the output regulating quantity, eliminates extreme working conditions of valve full opening and full closing, reduces thrust regulating overshoot, and greatly reduces pipeline instantaneous flow impact.

The application provides a wide-voltage-input industrial environment adaptive charging method and system, and relates to the technical field of charging control. The method comprises the following steps: collecting running parameters including input voltage in real time, analyzing fluctuation characteristics of the input voltage, and dividing the current input working condition level; based on the current input working condition level, generating an input-side constraint parameter set including alternating current current-limiting threshold and power climbing rate upper limit through a preset constraint parameter mapping relationship, and applying the input-side constraint parameter set to a control loop for constraint; determining a current charging stage and corresponding target charging current and voltage; when the working condition level changes, adjusting the target charging current based on available power; when the input voltage rebounds, restoring the target charging current according to a preset slope, and limiting the control loop. The application effectively solves the charging stability, continuity and availability problems under wide-voltage-input fluctuation by constructing an integrated control link.

The application discloses an ink circulating system for a 3D printing device and a 3D printing device, and aims to solve the problems of ink supply pressure fluctuation and surge. The system comprises a first ink bottle, a second ink bottle, a printing head, an ink supply and discharge system and a negative pressure device which are of the same structure. The negative pressure device provides different negative pressures for the two ink bottles, so that the pressure of the first ink bottle is higher than that of the second ink bottle, thereby driving the directional flow of the ink. Each ink bottle comprises a bottle body, a top negative pressure interface, a middle anti-surge sheet, a lower barrier sheet, a liquid level detection device, a bottom printing head connecting interface and an external ink interface. The anti-surge sheet is matched with the bottle wall gap and is provided with micropores, and the barrier sheet is also provided with micropores. Through the double damping structure in the bottle, the ink shaking and vortex caused by movement and the bubbles or oscillation generated by the flow of the ink are effectively inhibited, so that the printing head stably discharges the ink, and the system reliability, assembly convenience and operation continuity are improved.

The invention relates to the technical field of energy storage configuration of a direct-current flexible storage system, and discloses a light-storage direct-current flexible-oriented migration deep reinforcement learning multi-scene energy storage adaptive configuration method, system and device, and a medium, and the method comprises the steps: obtaining historical operation and device parameters, and constructing a typical operation scene set based on a clustering algorithm; constructing a double-layer Markov decision model; the upper-layer model takes the optimal annual comprehensive economic benefit of the system as a reward function, investment out-of-limit penalty is introduced, and the lower-layer model takes the optimal daily operation economic benefit as a reward function, and system security constraints are combined; a TD3 algorithm is improved based on a multi-scene migration strategy and a smooth constraint technology, a double-layer Markov decision model is solved, and a multi-scene energy storage adaptive configuration scheme considering investment benefits and operation benefits is formed. According to the invention, adaptive planning configuration of the energy storage capacity of the optical storage direct-flexible system can be realized under the condition of multiple scenes, the system investment and operation and maintenance cost are reduced, and the power supply reliability and operation economy of the optical storage direct-flexible system are improved.

The application provides a laser satellite network and a routing stability control method and controller thereof. The method comprises: acquiring current transmission rate levels and historical transmission rate levels of each laser inter-satellite link in the laser satellite network, wherein the transmission rate level is a limited number of discrete levels obtained by quantizing an instantaneous transmission rate; comparing the current transmission rate level with the historical transmission rate level to determine whether a link state changes; when the comparison result indicates that the link state changes, calculating a cost penalty according to a magnitude of the transmission rate level change, and resetting a stability count to an initial value; when the comparison result indicates that the link state does not change, incrementing the stability count, and calculating a cost reward according to the stability count; calculating a link cost according to a reference cost, the cost penalty and the cost reward; and selecting a data transmission path composed of one or more laser inter-satellite links from the plurality of laser inter-satellite links based on the link cost.

The application discloses a kind of based on raw material information feedback's weighing target value regulation and control system, specifically related to industrial automatic control technical field, raw material characteristic identification module exports characteristic feature group, its internal pre-set correlation screening model is according to feedback screening high correlation feature, constructs change matrix and generates dynamic compensation coefficient, and optimizes characteristic feature group output.Target value determination module determines weighing target value accordingly.After real-time weighing, deviation calculation module calculates the deviation of actual weighing and target value.Regulation and control execution module adjusts feeding equipment according to deviation, and uses dynamic compensation coefficient to correct adjustment amount, so that actual weighing approaches target value;The application constructs change matrix and generates dynamic compensation coefficient by screening high correlation feature, improves compensation pertinence;Regulation and control result is fed back to optimize characteristic identification, realizes self-learning closed loop;Dynamic compensation coefficient is used to correct adjustment amount, so that feeding equipment is self-adapting adjustment, significantly improves weighing precision, dynamic stability and repeatability.

The utility model relates to the technical field of engineering machinery, in particular to a cross beam structure of a rubber-tyred road roller, which comprises a support component, and a bottom clamping component is arranged at the bottom of the support component; according to the cross beam structure of the road roller, the shock absorption springs, the transverse springs and the vertical springs are matched with the shock absorption dampers, shock absorption is carried out on the cross beam structure of the road roller under the combined action of the transverse dampers and the vertical dampers, and shock generated when the springs rebound after absorbing shock and impact from the road surface are restrained; although the shock absorption springs can filter vibration of a road surface, the springs can do reciprocating motion, the shock absorbers are used for restraining jumping of the springs, then the buffering and shock absorption effects are achieved, the driver is used for driving the engine oil barrel to conduct automatic oil supply work, 95% of labor is saved, the maintenance interval time is prolonged through good lubrication, and the service life of the engine oil barrel is prolonged. The maintenance cost and shutdown loss are reduced, and the rubber-tyred road roller is light in operation, long in neutral sliding distance and capable of saving fuel oil consumption.

The present application belongs to the technical field related to transformer vibration isolation, and specifically relates to a combined vibration isolation device for transformers, which comprises: a mounting base and a supporting platform, wherein the upper ends of the mounting base near the four corners are hingedly connected with second vibration isolation supports for supporting the supporting platform, and the upper ends of the supporting platform near the four corners are provided with first vibration isolation supports for supporting the transformer box, and one-way valves are provided at one end of the air outlet pipe and the air intake pipe near the sliding groove, and when the cylindrical piston slides in a direction away from the bottom of the sliding groove, the hot air flow generated by the work inside the transformer box is sucked in through the short pipe and the air intake pipe, and then, when the cylindrical piston slides in a direction close to the bottom of the sliding groove, the cylindrical piston squeezes the hot air flow sucked in the sliding groove and discharges the hot air flow sucked in the sliding groove, and the cycle is repeated, which can greatly improve the air flow speed inside the transformer box.

The invention provides a loop parameter adaptive adjustment method, an energy storage aging test system and a medium. The loop parameter adaptive adjustment method is applied to an energy storage aging test system, the energy storage aging test system comprises at least two inverters, and the method comprises the following steps: controlling an inverter serving as a power grid end and another inverter serving as a load end to perform phase-locked grid connection; acquiring a first voltage instantaneous value of the inverter serving as a power grid end and a second voltage instantaneous value of a grid-connected port of the inverter serving as a load end; and based on an accumulated voltage error value of the first voltage instantaneous value and the second voltage instantaneous value in a preset statistical period, performing adaptive adjustment on parameters of a current loop at a grid-connected port of an inverter serving as a load end. According to the scheme, adaptive adjustment of the current loop parameters of the inverter at the load end can be realized, dynamic optimization of the control parameters in the aging test process is realized, and the stability and accuracy of the aging test are ensured.

The embodiment of the application provides a kind of hydraulic suspension system control method, vehicle and computer readable storage medium, the method comprises: obtaining the target actuation force of hydraulic suspension system, actual actuation force and working state parameter;Based on target actuation force, actual actuation force and working state parameter, determine the weight distribution coefficient of feedforward control quantity and feedback control quantity in hydraulic suspension system, and the amplitude limiting threshold of feedback control quantity;Amplitude limiting threshold is based on the amplitude limiting processing of feedback control quantity, obtains the feedback control quantity after limiting amplitude;Based on weight distribution coefficient, the weighted summation of feedforward control quantity and the feedback control quantity after limiting amplitude is obtained, obtains target control quantity, and based on target control quantity, control is carried out to hydraulic suspension system.The application solves the technical problem that the control accuracy of hydraulic suspension system in the related art is low.

The application relates to the technical field of point cloud registration, in particular to a positioning method for numerical control machine tool machining, which comprises the following steps: taking the curvatures of standard data points in a standard point cloud as machining complexity; obtaining a real-time point cloud of a raw material to be machined; in one iteration of an ICP algorithm, a transformation matrix of the real-time point cloud is updated with the minimum matching error as the target until the change of the minimum matching error between two adjacent iterations is less than a preset value or the iteration number reaches a maximum number, and the transformation matrix is taken as a target matrix; and the raw material to be machined is adjusted based on the target matrix to complete positioning. According to the technical scheme, the influence of the machining complexity of each position point on the machining allowance of a structural member can be considered, and accurate positioning of the raw material to be machined is realized.

The invention relates to the technical field of intelligent robot navigation and control, and discloses a parking lot inspection robot path planning method which comprises the following steps: step 1, acquiring parking lot environment information and constructing a multi-dimensional heterogeneous potential site map which comprises a physical barrier layer, a communication field intensity distribution layer and a risk probability distribution layer, meanwhile, global control parameters of path planning are reversely deduced and set on the basis of preset operation indexes, and the global control parameters at least comprise opportunity constraint confidence coefficients and stable gating threshold values. A global cost function of nonlinear coupling of risk revenue and communication quality is adopted, and multi-dimensional heterogeneous potential field map construction is combined, so that the technical effects of dynamically and preferentially planning a high-risk area and giving consideration to signal coverage are achieved, and quick response and value maximization to a temperature rise or smoke dangerous case in a finite time window are realized; the defect that high-risk hidden danger leak detection is caused by lack of elasticity of an existing static inspection route is overcome.

The utility model belongs to the technical field of building walls, and particularly relates to an energy-saving building wall structure with high shock strength, which comprises a building wall body and a protective plate. The bottoms of the two sides of the building wall body are fixedly connected with bases correspondingly, and first damping assemblies are arranged at the centers of the front faces and the back faces of the two sides of the building wall body correspondingly. Through the structural design of a damper, a first sliding groove, a first sliding block, a first spring and a movable rod, the elastic effect of the first spring is used for damping a protection plate and buffering external force, so that the protection effect of the building wall body is improved, oscillation generated when the first spring and a second spring rebound is effectively restrained, and the service life of the building wall body is prolonged. The anti-seismic performance of the building wall body is improved through the reinforcing ribs, collapse of the building wall body during an earthquake is avoided, the damping and buffering effect on the protection plate is further improved through the structural design of the second springs and the supporting plate, and the protection performance of the building wall body is improved.

A method and device for managing link state in an MRP ring network, the method comprising: in an open loop state, in response to receiving a first MRP link state packet from any one of two ring ports of an MRM, starting a time window with the time of the receiving as the starting point; within the time window, in response to receiving a first MRP link state packet from the other of the two ring ports, and the link states indicated by the first MRP link state packets received by each of the two ring ports being different, determining the ring port receiving the first MRP link state packet first as a priority port, and determining the ring port receiving the first MRP link state packet later as a sub-priority port; before determining that the forwarding path is in a stable state, processing each MRP link state packet received from the priority port in turn, and not processing each MRP link state packet received from the sub-priority port, effectively suppressing the occurrence of ring network oscillation.

The utility model relates to the technical field of machining centers, and discloses a high-stability water-cooling machining center which comprises a base, a stand column is fixedly installed on the side wall of the base, a top plate is fixedly installed on the side wall of the top of the stand column, a tool apron is arranged at the bottom of the top plate in a sliding mode, and a machining tool bit is rotationally connected to the bottom of the tool apron. A connecting block is fixedly connected to the side wall of the top of the tool apron, a shock absorber is fixedly installed at the bottom of the end, away from the base, of the connecting block, a first spring is fixedly connected between the two ends of the shock absorber, and a water sprayer is fixedly connected to the bottom end of the shock absorber; the side, close to the machining tool bit, of the water sprayer is fixedly connected with a water spraying pipe, and the bottom of the side, close to the machining tool bit, of the water sprayer is slidably connected with a fixing block. Direct connection between the water spraying pipe and the machining tool bit can be avoided, the stability of the water spraying pipe in the working process is improved, and the cooling effect is improved.

The utility model discloses a composite spring which comprises a base, a damping assembly installed on the base, a damping spring arranged on the damping assembly in a sleeved mode, a top seat installed on the damping assembly, a damping seat arranged on the damping assembly in a sleeved mode, a damping plate installed on the damping seat and a connecting assembly. The damping seat is located between the base and the top seat, the top of the damping plate abuts against the bottom of the top seat, the base and the top seat are both detachably connected with the connecting assembly, one end of the damping spring is installed on the base, and the other end of the damping spring is installed on the damping seat. The multiple damping plates are arranged at intervals. Combined damping is conducted through the damping springs and the damping plates, the damping effect is good, the structure is simple, assembling is easy, the damping assemblies are used for restraining vibration generated when the damping springs and the damping plates rebound after absorbing vibration, and the connecting assemblies are used for connecting the two adjacent composite springs and improving the damping effect.

This invention provides an adaptive energy-saving control method and system for industrial environmental control systems based on large-scale model-based operating condition prediction, applied in the field of industrial data processing technology. It collects various types of data, including equipment, environmental, meteorological, and energy consumption data, and performs unified benchmarking, cleaning, and standardization preprocessing. Then, it constructs an operating condition identification model using time-series coding, sliding windows, and a large-scale model, classifying four operating conditions. Combining equipment limits, energy efficiency curves, and zoning requirements, it establishes a mapping relationship between energy consumption and control parameters, generating a multi-equipment collaborative control rule base. Relying on feedback closed-loop and adaptive PID algorithms, coupled with anti-jitter and load balancing mechanisms, it ensures stable system operation. Using energy consumption, environmental indicators, and equipment stability as evaluation criteria, it constructs a dynamic weighted loss function iterative optimization strategy to correct the model and control parameters. Finally, it issues control commands, retains data, and outputs reports, achieving intelligent energy-saving management throughout the entire process.

This utility model belongs to the technical field of single-disc check valves and discloses a single-disc check valve that reduces opening pressure. It includes a valve body, a valve seat, and a valve disc. A connecting plate is mounted on the valve seat, and the valve disc is mounted on the valve seat via a variable-diameter spring assembly and the connecting plate. The variable-diameter spring assembly includes at least three spring segments with different wire diameters, the wire diameter of which decreases progressively along the fluid direction. Each spring segment includes a first spring segment, a second spring segment, and a third spring segment. The first spring segment is connected to the valve disc, and the wire diameter variation gradient of the variable-diameter spring assembly is from 0.2mm to 0.15mm to 0.1mm, with the length ratio of the first, second, and third spring segments being 1:1.5:2. This utility model, through the progressive elasticity design of the variable-diameter spring assembly, the low-friction structure of the conical sealing surface, and the dynamic adjustment capability of the counterweight balance chamber, can comprehensively reduce the initial opening pressure while minimizing fluid energy loss, making it suitable for a wide range of media, from low-viscosity gases to high-viscosity oils.

The invention discloses a motor control type intelligent oil cylinder control method and device and a storage medium, and the method comprises the steps: calling a historical load database, extracting historical load data matched with the currently collected cylinder body temperature and hydraulic pipeline pressure, combining the operation state of a sealing element and the current hydraulic pipeline flow, pre-judging the current load working condition, and calculating the current load working condition; according to the pre-judged load working condition, hierarchical control unit division is executed, an oil cylinder hydraulic control module is divided into a basic bearing unit, a precise adjusting unit and an emergency compensation unit, the precision and efficiency of the pre-judged load working condition are improved, the deviation value of a target control parameter and a current core operation parameter is calculated, and the control precision is improved. And in combination with the pre-judged load working condition and the operation state of each control unit, differential adjustment control is executed, so that mechanical adjustment and oil cylinder adjustment are synchronous, adjustment lag and oil cylinder oscillation are avoided, and the adjustment process is stable and rapid.