1086 results about "Hydraulic drive system" patented technology

The invention relates to the technical field of hydraulic transmission, and provides a variable-speed variable-displacement electro-hydraulic power source control method and a hydraulic system.The method comprises the specific steps that the system pressure and the system flow at the current moment are obtained; the initial rotating speed of the servo motor at the current moment is detected, and the initial displacement of the two-way variable pump at the current moment is obtained; a genetic algorithm is used for obtaining the optimal displacement of the two-way variable pump and the optimal rotating speed of the servo motor; the servo motor is adjusted according to the optimal rotating speed of the servo motor, so that the two-way variable pump works at the combination point of the optimal displacement and the optimal rotating speed; and during the working period of the two-way variable pump, the steps are cyclically executed to realize real-time regulation and control of the electro-hydraulic power source. According to the method, the efficiency model and the dynamic response model of the electro-hydraulic power source are established, the intelligent optimization algorithm is used for conducting multi-target dynamic optimization on the efficiency and the response time of the electro-hydraulic power source, the rotating speed of the servo motor and the displacement of the two-way variable pump are controlled in a coordinated mode, and the electro-hydraulic power source works in a high-efficiency and high-response area.

The invention relates to a motion compensation type pile gripper perpendicularity adjustment control method which comprises the following steps: 1, mounting a tilt angle sensor and a displacement sensor on a pile gripper for detecting the tilt angle theta of a pile body and the position of a supporting arm in real time; step 2, acquiring a current inclination angle value theta c and a target value theta t through a control system, calculating a real-time perpendicularity deviation delta theta = theta c-theta t, and driving a servo mechanism to adjust the position of a supporting arm according to the perpendicularity deviation delta theta so as to perform motion compensation; and step 3, dynamically correcting the compensation process by using a closed-loop control algorithm until the condition that verticality adjustment is completed is met, namely delta theta is less than or equal to epsilon, and epsilon is an allowable error threshold. A high-precision inclination angle sensor and a displacement sensor are installed on the pile gripper, the inclination angle of a pile body and the position deviation of a supporting arm are detected in real time, and a control signal is dynamically generated through a closed-loop control algorithm to drive a servo mechanism to conduct adjustment. A dynamic parameter compensation mechanism is designed, control parameters are corrected in real time according to the inclination angle of the foundation and external force interference, the adjusting precision and stability under the conditions of complex terrains and dynamic external force are remarkably improved, a servo mechanism achieves precise action through a hydraulic driving system and a proportional control valve, the response time of the servo mechanism meets the engineering requirement, and the engineering cost is reduced. And the perpendicularity error of the pile body can be controlled within a preset range, the construction efficiency and the long-term stability are improved, and the problem that a traditional manual adjustment and mechanical auxiliary system is insufficient in precision is solved.

The invention belongs to the technical field of hydraulic transmission and control, and discloses a high-precision positioning control method and system of a servo electro-hydraulic actuator. Real-time operation parameters of a servo electro-hydraulic actuator under different working frequencies are obtained, a servo valve dynamic return difference characteristic curve is constructed, a return difference characteristic change mode is extracted, and a dynamic influence model of return difference characteristic change on positioning precision is established. Based on the model, a frequency self-adaptive compensation strategy is designed in combination with a pressure fluctuation value of a hydraulic system, and real-time correction of a servo valve control signal is achieved. According to the method, a differentiation strategy combining low-frequency feed-forward compensation and high-frequency feedback compensation is innovatively adopted, a smooth transition mechanism is designed, and the problem that the positioning precision fluctuates under the frequency change working condition in a traditional control method is solved. According to the invention, high-precision positioning control of the servo electro-hydraulic actuator in a full frequency band range is realized, and the positioning precision and stability of the system under a dynamic working condition are improved.

The invention relates to an intelligent oil containment boom mechanical arm device and a control method thereof. The intelligent oil containment boom mechanical arm device comprises a mechanical arm, a hydraulic driving system, a sensing system and a control unit. The mechanical arm comprises a transmission base, a steering stand column, a large arm, a small arm, an overturning head and a tail end grabbing hook assembly. The hydraulic driving system comprises a hydraulic pump station, a proportional reversing electromagnetic valve group and a plurality of execution oil cylinders; the sensing system comprises a gyroscope array and a camera array to form a distributed attitude sensing network and a distributed visual sensing network; the control unit identifies and positions an oil containment boom target based on a sea surface image acquired by the distributed visual perception network, performs motion planning on the mechanical arm, and controls the mechanical arm to move and grab the target; in the target positioning process, posture changes of all parts of the mechanical arm are sensed in real time based on the distributed posture sensing network, and dynamic compensation is conducted on the posture error of the mechanical arm. According to the device, the oil containment boom can be quickly, accurately, reliably and intelligently grabbed, and the laying efficiency and safety of the oil containment boom are improved.

The invention belongs to the field of hydraulic mechanical arm modeling, and provides a hydraulic mechanical arm modeling method and system fusing a physical model and data driving. The modeling method for the hydraulic mechanical arm fusing the physical model and the data drive comprises the steps that the hydraulic mechanical arm is virtually decomposed into a plurality of mutually independent sub-models, so that a closed chain structure between a joint and a connecting rod is decoupled; constructing a hydraulic driving system model of each sub-model, and further combining the hydraulic driving system model with the corresponding sub-model to form a corresponding subsystem; an embedded neural network model is adopted to learn dynamic characteristics of the hydraulic mechanical arm under different working conditions, and then dynamic compensation is conducted on all subsystems; and combining the subsystems with the dynamic compensation of the embedded neural network models corresponding to the subsystems to construct a dynamic model of the hydraulic mechanical arm. The modeling precision of the hydraulic mechanical arm can be improved, and the response speed of the hydraulic mechanical arm can be increased.

The utility model belongs to the technical field of tire manufacturing, and discloses a post-inflation device and tire production equipment. The post-inflation device comprises a frame body, an upper cross beam mechanism, a lower cross beam mechanism, a lifting lead screw, a lead screw nut, a worm gear, a worm and a driving piece. Compared with a hydraulic transmission mode in the prior art, the transmission structure composed of the worm gear, the worm, the lead screw nut and the lifting lead screw has the advantages that stability and safety cannot be affected by oil leakage, pipe explosion and the like, so that the stability and safety of the post-inflation device are better, and the service life of the post-inflation device is prolonged. And potential safety hazards in the tire production process can be avoided. Comprising the post-inflation device is better in stability and safety, and then potential safety hazards in the tire production process can be avoided.

The invention belongs to the technical field of conveying equipment and discloses a scissor lift which comprises a driving assembly, a lifting device, pressure detection assemblies, a lower connecting piece, a lifting belt, a drag chain and an upper connecting piece, the multiple pressure detection assemblies are installed at the bottom of the lower connecting piece, and the bottom of the lifting device is in transmission connection in the lower connecting piece. The top of the lifting device is in transmission connection in the upper connecting piece, the upper end of the upper connecting piece is connected with the connecting frame, the driving assembly is installed above the upper connecting piece, the other end of the driving assembly is connected with the hanging belts, the hanging belts are arranged in pairs, the bottoms of the hanging belts are installed below the lifting device, and the drag chains are arranged in pairs and installed between the lower connecting piece and the upper connecting piece. The drag chain is arranged outside the lifting device. The problems that in the prior art, due to the fact that hydraulic transmission is adopted by a shear fork type elevator, the maintenance cost is high, and the resource cost is high are solved. The application range and practicability are improved, and the use cost is reduced.

The invention discloses a mold closing driving mechanism and an injection molding machine with the same, relates to the technical field of injection molding machines, and aims to solve the technical problem of high cost of automatic cutting equipment. Comprising a machine tool, a hydraulic transmission system arranged at the top of the machine tool, a mold closing mechanism arranged at the output end of the hydraulic transmission system and provided with a cooling system, a molding assembly and a twisting-off assembly arranged in a machine cover, and a material distributing assembly arranged at the top of the machine tool. According to the mold closing driving mechanism disclosed by the invention, the functions of molding and sprue waste removal are integrated into the molding rod; in a traditional production process, molding and waste removal often need to be operated separately, however, through the ingenious design, after molding is completed, a molding rod can be directly used for treating sprue waste, the conversion time between procedures is shortened, and the production efficiency is greatly improved; compared with traditional automatic cutting equipment, only few structures such as the twisting-removing assembly are added, and cost increase is limited.

The invention discloses a gear and gear ring transmission high-speed and high-pressure axial connecting rod plunger device, which relates to the technical field of hydraulic transmission and control, and comprises a cylinder body rotatably arranged in a shell accommodating cavity, a transmission shaft in transmission connection with the cylinder body, a gear ring connected with the cylinder body, a crowned tooth return plate obliquely arranged and driven by the gear ring, and a plunger slidably arranged in a cylinder body hole, the sliding shoe friction mechanism is arranged in the containing cavity, the sliding shoe is attached to the wear-resisting lining plate, the sliding shoe is connected with the plunger through a connecting rod, the flow distribution friction mechanism is arranged in the containing cavity, the floating lining plate is connected with the cylinder body through a floating sleeve, and the flow distribution plate is connected with the rear end cover. By adopting gear and gear ring transmission, lateral force borne by a plunger in an axial plunger pump or a motor can be eliminated, and the risk that a plunger ball head portion loses efficacy is avoided. During working, the gear ring and the cylinder body rotate synchronously, and the crowned tooth return plate rotates synchronously under the action of the gear ring, so that the stress states of the sliding shoes and the plungers are greatly improved, the reliability of the structure is improved, and the service life of the structure is prolonged.

Methods and systems for detecting a torque transmission failure in an aircraft power plant are provided. The system comprises a hydrostatic transmission for transmitting torque between a first shaft and a second shaft using hydraulic fluid, an a failure detector including a sensor configured to detect a pressure change in the hydraulic fluid. The failure detector is configured to generate an output indicative of the torque transmission failure in response to the pressure change having crossed a threshold.

The invention discloses a joint simulation method and device for an active heave compensation system and a medium, and relates to the technical field of ocean engineering.The method comprises the steps that a mechanical execution system of the active heave compensation system is constructed through OrcaFlex so as to simulate the heave compensation dynamics process of a controlled load under the complex sea condition; a hydraulic driving system of the active heave compensation system is constructed through AMESim so as to simulate dynamic response, hydraulic flow and pressure changes of a real nonlinear hydraulic driving system under different working conditions; a control system of the active heave compensation system is constructed through a Simulink module of the Matlab; and the connection between the Matlab and the AMESim and the connection between the Matlab and the OrcaFlex are constructed through an AMESim joint simulation interface of the Matlab and an Matlab Engine API (Application Program Interface) oriented to the Python environment, so that joint simulation is executed. With the adoption of the method, OrcaFlex, Python, Matlab and AMESim can be combined to construct a mechanical-electrical-hydraulic research system which is closer to engineering practice, so that a more accurate and reliable simulation analysis result is obtained.

The invention provides an electro-hydraulic composite rotation control system, and relates to the technical field of hydraulic transmission, the system combines the speed control advantage of motor driving and the high power density characteristic of hydraulic driving, and the stability, high efficiency and high power output in the rotation process are considered; the system mainly comprises a driving motor, a main pump, a four-quadrant pump / motor and other components, dynamic response and closed-loop control between the motor and the hydraulic pump / motor are achieved through an electro-hydraulic composite coordination control strategy and an optimal torque distribution algorithm based on a genetic algorithm, the starting and braking time is effectively shortened, and the rotation efficiency is improved. In the rotary braking process, kinetic energy is converted into hydraulic energy or electric energy to be stored through the energy recovery function of the four-quadrant pump / motor and the electric power generation all-in-one machine, and the energy recovery efficiency is improved. In addition, the system has the capability of outputting torque by assisting the four-quadrant pump / motor under special working conditions, and the adaptability and stability of the system are further enhanced.

The invention provides a distributed electro-hydraulic driving system based on bucket rod independent oil supplementation and an electric excavator. The distributed electro-hydraulic driving system comprises a bucket distributed system assembly, a bucket rod distributed system assembly, a movable arm distributed system assembly and a hydraulic oil tank. Each distributed system assembly is provided with a driving motor to drive an open type variable pump to supply oil to the open type variable pump so as to independently drive a corresponding working oil cylinder to operate, and each bucket rod distributed system assembly is additionally and independently provided with a bucket rod oil supplementing motor to drive a bucket rod metering pump to supply oil to the bucket rod metering pump so as to solve the problems that when a bucket rod oil cylinder operates rapidly, the flow demand is large, and the operation is complex. And oil supply is insufficient. The system aims at achieving high-energy-efficiency distributed driving of multiple linear actuators of the electric excavator so as to solve the problems that a centralized hydraulic system of an existing electric excavator is high in energy consumption and low in energy efficiency.

The invention discloses a hydraulic mechanical transmission device control method based on optimal trajectory optimization, and relates to the technical field of equipment intelligent auxiliary operation and control, and the method comprises the following steps: S1, building a physical model of a hydraulic mechanical transmission device; s2, taking the shortest motion time, the most smooth trajectory and the minimum energy consumption as optimization objectives, and obtaining an optimal trajectory based on a trajectory planning algorithm combining an improved sparrow algorithm and a quintic non-uniform B-spline curve; s3, oil return control is optimized; and S4, oil inlet control is optimized, specifically, an oil inlet flow controller is optimized based on a time-varying secant obstacle Lyapunov function and an RBF neural network. According to the trajectory planning algorithm, the trajectory of the hydraulic transmission device can be optimized, oil return and oil inlet are optimized based on the optimal trajectory, and working trajectory planning and high-precision control over the hydraulic equipment executing mechanism are achieved.

When the hydraulic system stops working, a hydraulic pump set stops, a proportional throttle valve is opened to enable an oil inlet pipeline to be communicated with a backflow pipeline, high-pressure oil in a high-pressure energy accumulator set gradually flows to the backflow pipeline through the proportional throttle valve, and the high-pressure oil in the high-pressure energy accumulator set flows to the backflow pipeline through the proportional throttle valve. And when the pressure in the oil inlet pipeline is reduced to the inflation pressure of the high-pressure energy accumulator group, the cartridge valve is opened, so that high-pressure oil in the oil supply pipeline and the hydraulic pump group completely flows back to the oil tank through the cartridge valve. By means of the method and system, stable pressure relief and unloading can be conducted on a high-pressure and ultra-large-flow hydraulic system, huge high-pressure liquid energy accumulated in a high-pressure pipeline and a high-pressure energy accumulator is gradually and stably relieved, impact vibration and noise are effectively reduced, and therefore it is guaranteed that a heavy equipment hydraulic transmission system works stably, reliability is high, and the service life is long.

In a hydraulic drive system used for an electrically driven hydraulic work machine that drives a hydraulic pump by an electric motor and supplies a hydraulic fluid to plural actuators to carry out work, the power consumption of the hydraulic pump is kept from exceeding a value decided in advance. For this purpose, a controller calculates target power to be consumed by the hydraulic pump on the basis of the capacity of the hydraulic pump, the delivery pressure of the hydraulic pump sensed by a pressure sensor, and a target revolution speed of the electric motor, and limits the target revolution speed of the electric motor in such a manner that the target power falls within a range of the maximum allowable power.

The invention relates to the technical field of thermoplastic material forming, in particular to a precise thermoplastic material forming device and a manufacturing method thereof.The precise thermoplastic material forming device comprises a female die fixing plate, and guide rods are directly arranged at the four corners between the female die fixing plate and a male die fixing plate; a female mold plate is installed on the female mold fixing plate, an extrusion pipe used for extruding hot melt plastic is arranged between the female mold fixing plate and the middle of the female mold plate in an embedded mode, and a water circulation channel is arranged in the female mold. According to the device, efficient and accurate control over thermoplastic material forming is achieved through a well-designed mechanical structure and a well-designed hydraulic transmission system. Specifically, the hydraulic transmission assembly of the machine tool drives the movable plate to move left and right, accurate mold closing and mold opening of the female mold plate and the male mold plate are achieved, uniform mold release agent spraying can be conducted on the mold before mold closing, the service life of the mold is effectively prolonged, and the quality of formed plastic products is effectively improved.

The invention discloses a double-push-rod hydraulic deviation rectifying device, and relates to the technical field of conveyor belt deviation rectifying, a mounting plate and a mounting frame rotationally connected to the mounting plate, two first mounting pipes are rotationally connected to each of the two sides in the mounting frame, and an adjusting pipe and a deviation rectifying adjusting mechanism are fixedly connected between the two first mounting pipes; according to the double-push-rod hydraulic deviation rectifying device, the multiple mounting plates are fixedly mounted on the conveyor, when a belt on the conveyor deviates, the belt drives the hydraulic transmission control mechanism to operate at the moment, then the hydraulic transmission control mechanism starts the electric hydraulic push rods to operate, the electric hydraulic push rods are driven by the belt to operate, and the deviation rectifying adjusting mechanism is driven by the electric hydraulic push rods to operate. The electric hydraulic push rod drives the mounting frame to rotate, so that the belt is driven to move, the belt inclines towards one side, meanwhile, the belt is driven to move through the adjusting roller, the belt moves towards the middle position of the mounting frame, and therefore automatic deviation correction of the deviated belt is achieved.

The drive system comprises a hydraulic pump and a hydraulic motor, both having an inlet port and an outlet port, the motor being a fixed displacement motor directly coupled to the cleaning fan for rotationally driving said fan, the pump being a variable displacement pump configured to produce a flow of hydraulic liquid to the motor. In a system according to the invention, the outlet port of the pump is coupled to the inlet port of the motor by a hydraulic line, wherein said line does not comprise a valve for regulating a flow of hydraulic liquid to the motor. In the system of the invention, the flow to the motor is not regulated through a flow regulating valve between pump and motor, but by changing the pump displacement electronically. To this aim, the pump includes an electronically actuated hydraulic control system for controlling the pump displacement regardless of the hydraulic pressure of the liquid in the hydraulic line between the pump and the motor. The pump and the motor are part of an open hydraulic circuit.

The invention discloses a motor temperature control method and system based on hydraulic transmission and fuzzy control. The method comprises the steps that current temperature data are collected in real time through temperature sensors arranged in a plurality of key temperature areas in a driving motor and preprocessed; predicting the temperature change trend of the key temperature zone by adopting a self-learning fuzzy control algorithm, and generating a hydraulic coarse tuning signal and an electromagnetic fine tuning signal; controlling a hydraulic actuating mechanism to adjust the flow of a cooling medium to realize preliminary cooling, and controlling an electromagnetic fine adjustment mechanism to adjust the flow of the cooling medium corresponding to a local area in the key temperature area to perform temperature compensation; and uploading the regulated current temperature data to a cloud platform in real time, updating control parameters, and feeding back the control parameters to a self-learning fuzzy control algorithm to form closed-loop control. According to the invention, real-time dynamic balance regulation and control of the temperature of each key temperature zone in the driving motor can be effectively realized, and local thermal load changes are quickly responded, so that the overall temperature of the driving motor stably reaches a preset standard.

The utility model belongs to the technical field of tire manufacturing, and discloses a post-inflation device and tire production equipment. The post-inflation device comprises a frame body, an upper cross beam mechanism, a lower cross beam mechanism, a lead screw, a driving nut, a driving assembly and a limiting assembly. Compared with a hydraulic transmission mode in the prior art, the transmission structure composed of the lead screw and the driving nut has the advantages that stability and safety cannot be affected by oil leakage, pipe explosion and the like, so that the stability and safety of the post-inflation device are better, and the post-inflation device is convenient to use. And potential safety hazards in the tire production process can be avoided. Comprising the post-inflation device is better in stability and safety, and then potential safety hazards in the tire production process can be avoided.

The invention relates to a digital twin modeling method and consistency optimization method of hydraulic forming equipment, and the method comprises the steps: building a digital twin model of the hydraulic forming equipment which comprises terminal forming equipment, a hydraulic driving system and a controller, the digital twin model comprises a multi-body dynamics simulation unit, a hydraulic system simulation unit and a control system simulation unit; operating data of the hydraulic driving system and the terminal forming equipment are acquired through the data acquisition system, and the operating data are input into the hydraulic system simulation unit and the control system simulation unit; the control system simulation unit generates a simulation control signal by adopting feedback control logic based on the operation data and sends the simulation control signal to the controller and the hydraulic system simulation unit; the hydraulic system simulation unit generates a simulation driving signal according to the operation data and the simulation control signal and sends the simulation driving signal to the multi-body dynamics simulation unit, and the multi-body dynamics simulation unit displays the motion condition of the terminal forming equipment based on the simulation driving signal.

The invention discloses a hydraulic crusher transmission device for mining, and relates to the technical field of hydraulic transmission, the hydraulic crusher transmission device comprises a cylinder body and a hydraulic system arranged in the cylinder body and used for driving an oil cylinder rod to move, and further comprises a drill rod used for crushing ores, and a nitrogen chamber used for containing compressed nitrogen is formed in the top of an inner cavity groove; the cylinder body is provided with an auxiliary energy mechanism for adjusting the impact acting force of the drill rod on a mining face, the auxiliary energy mechanism comprises an axial position ring which is located in the inner cavity groove and is coaxial with the oil cylinder rod, the axial position ring is provided with a cylindrical cavity channel for oil liquid to circulate, and the cylinder body is provided with a pressure speed assembly for adjusting the flow speed in the cylindrical cavity channel to change the flow speed of the oil liquid in contact with the axial convex part; by arranging the auxiliary energy mechanism, the impact force on the mining face can be improved by changing the sectional dimension of the cylindrical cavity channel, utilizing the Venturi effect and increasing the oil flow speed according to the change of the rock hardness in the actual mining process, so that the purpose of dynamically adjusting the impact force of the drill rod on the mining face is achieved.

The invention discloses a glass toughening bending forming device, and relates to the technical field of glass forming. The device comprises a device body, a high-temperature chamber is arranged on the left side in the device body, a forming assembly is arranged in the device body and is in hydraulic transmission, a forming auxiliary assembly is arranged on the upper portion in the device body, and the bottom of the forming auxiliary assembly is in an arc shape; a preparation frame is fixedly installed on the left side of the device body, a fixing plate is fixedly installed on the left side of the preparation frame, a double-head motor is fixedly installed on the side, away from the center of the preparation frame, of the fixing plate, and an arc groove rod is fixedly installed at the output end of the side, close to the center of the preparation frame, of the double-head motor. The surface of the raw glass sheet is uniformly brushed by the brushing plate, so that flaws caused by deep sinking of particles on the surface of the raw glass sheet during subsequent heating are prevented, and the strength of a finished product is prevented from being reduced.

The present invention relates to a vertical take-off and landing (VTOL) aircraft featuring a central fuselage and at least two power units. Each power unit is connected to at least two separate lifting rotors via transmission lines, ensuring that each power unit is linked to at least two rotors diametrically opposed relative to the centre of gravity of the aircraft. The lifting rotors might be driven by power transmission lines of hydrostatic type. The power units on either side might be housed in separate pods which might be incorporated into the main fuselage or arranged as separate pods. These separate pods might also function as floats / pontoons for the aircraft to land, take-off and manoeuvre on water.

The invention discloses a wheel-foot vehicle combining a wheel type mode and a foot type mode. The wheel-foot vehicle comprises bionic legs, a hydraulic driving system, non-pneumatic tires and an anti-rolling vehicle frame. The bionic legs comprise thighs and shanks to enhance obstacle crossing ability, the hydraulic driving system provides strong power and sufficient displacement for the three-stage hydraulic columns, the non-pneumatic tires are polyurethane flexible spoke type tires to reduce maintenance, and the anti-rolling frame guarantees safety of the vehicle and passengers. The designed wheel-foot vehicle aims at improving the trafficability and maneuverability of complex terrains, through an innovative wheel-foot conversion mechanism, the capacity of fast wheel-type running on a flat road surface and foot-type obstacle crossing on a rugged ground is achieved, and high adaptability and operation flexibility are achieved.

The invention provides an integrated hydraulic cylinder cluster synchronous control system which comprises a hydraulic transmission loop and an electro-hydraulic control system, the hydraulic transmission loop comprises multiple sets of oil cylinders connected with a rapid emergency gate, at least two sets of oil pump motor sets and an energy accumulator module, and the multiple sets of oil pump motor sets are connected with the multiple sets of oil cylinders after being connected with the energy accumulator module in parallel; the hydraulic transmission loop further comprises an electromagnetic overflow valve, a first electromagnetic reversing valve, a second electromagnetic reversing valve, an electromagnetic speed regulating valve, a manual speed regulating valve and a balance valve, and two sets of parallel flow control units are arranged on each oil cylinder transmission loop and used for controlling the speed of the oil cylinders. The electro-hydraulic control system comprises a pressure sensor connected with the energy accumulator module, a pressure sensor connected with the oil cylinder, a travel switch, a displacement sensor and an opening instrument connected with the gate. The power requirements of the quick emergency gate under different working conditions are met, and the compound control method of the multiple hydraulic hoist oil cylinders is achieved.

The invention relates to the field of land levelers, and particularly discloses a dynamic efficiency matching method and system for a pure electric land leveler. Detecting driver operation actions, and calculating required hydraulic oil total flow according to the driver operation actions; based on the hydraulic oil pressure in the hydraulic loop and the total flow of the required hydraulic transmission medium, finding out the motor rotating speed corresponding to the maximum total driving efficiency of the working device through a circulating optimization algorithm, and recording the motor rotating speed as the optimal motor rotating speed; and generating an actual execution rotating speed instruction according to the optimal motor rotating speed, and issuing the instruction to a working device motor controller. The motor parameters of the working device are dynamically adjusted according to the actual working conditions, and energy efficiency maximization and performance optimization are achieved.

The invention discloses a rope-driven parallel mechanism for capturing of an underwater unmanned submersible vehicle, and belongs to the technical field of capturing of underwater unmanned submersible vehicles. A plurality of rope driving motors are fixedly arranged on a catamaran console of the catamaran navigation system, and motor pulleys are fixedly arranged on output shafts of the rope driving motors; the upper ends of the two shear type telescopic mechanisms are fixedly connected with the left side and the right side of the lower end of the catamaran navigation system, the hydraulic driving system is fixedly arranged between the upper ends of the two shear type telescopic mechanisms, and the hydraulic driving end of the hydraulic driving system is connected with the two shear type telescopic mechanisms. The two shear type telescopic mechanisms are driven by the hydraulic driving system to stretch or retract underwater; one end of a steel wire rope is connected with a motor pulley, and the other end of the steel wire rope sequentially bypasses a catamaran pulley on the catamaran navigation system, a shear-type pulley on the shear-type telescopic mechanism and a guide pulley to be connected with the capturing system to perform six-degree-of-freedom movement, so that the unmanned underwater vehicle is quickly and efficiently captured and recovered in a complex underwater environment.

The invention discloses an anti-overturning active control method and device for a single-column pier bridge and a medium. The method comprises the steps that a thundersight displacement monitoring system and a hydraulic driving system are deployed; leighting multi-mode fusion data are obtained, and the transverse overturning angle of a beam body is calculated; constructing a digital twinborn body for predicting the overturning state of the bridge structure, and predicting the overturning states of the bridge at multiple moments in the future; and constructing an intelligent agent, and controlling the hydraulic driving system to execute an anti-overturning action based on the predicted bridge overturning state. The device and the medium are both used for implementing the method. The beneficial effects of the invention are that the structure displacement monitoring method based on Reighting heterogeneous fusion is provided for a traditional mode of a single structure displacement detection means, interference factor identification and weighted fusion in different environments are realized, and the reliability of monitored structure displacement data is ensured.