37results about How to "Improve precision control" patented technology

The invention relates to the field of electrochemical polishing of cobalt-based alloys, in particular to an environment-friendly electrochemical polishing solution of a cobalt-chromium-tungsten-nickel alloy and a polishing method of the environment-friendly electrochemical polishing solution. The cobalt-based alloy comprises the following chemical elements in percentage by mass: 15.0-25.0% of Cr; w: 10.0% to 20.0%; 0.0% to 15.0% of Ni; the balance is Co and unavoidable impurity elements such as O, N and H. The environment-friendly polishing solution comprises the following chemical components by mole percent: 0.5-2 mol / L of ChCl; 0.7 to 1.0 L of ethylene glycol; 0 to 0.3 L of ethanol; 0.1 to 0.3 L of glacial acetic acid; and a small amount of citric acid. According to the electrolytic polishing, alloy serves as an anode, a U-shaped titanium plate serves as a cathode, the voltage is 40-60 V, the current density is 0.5-2 A / cm < 2 >, and the polishing temperature is normal temperature. The method has the advantages that the environment-friendly electrolyte is adopted, the surface of the cobalt-chromium-tungsten-nickel alloy can be polished, pollution caused by electrolyte of a traditional chromium oxide system and an acid system is avoided, the follow-up repeated cleaning procedure is reduced, and material precision control is improved.

The invention discloses a biaxial complete decoupling cutter servo device and a design method thereof, and the biaxial complete decoupling cutter servo device comprises a compliant mechanism platform, a piezoelectric stack I, a piezoelectric stack II, a diamond cutter, a measuring baffle plate, a capacitive displacement sensor I, a capacitive displacement sensor II and an upper cover plate, the diamond cutter is installed on the cutter holder platform, the compliant mechanism platform further comprises a topology compliant mechanism, a first input guide mechanism, a second input guide mechanism and an output guide mechanism, the output guide mechanism is located at the front end of the compliant mechanism platform, and the rear end of the topology compliant mechanism is connected with the front end of the first input guide mechanism and the front end of the second input guide mechanism. According to the method, the compliant mechanism is designed by adopting a topological optimization method, and the optimal mechanism configuration-parameter design can be sought under the condition that a design domain and specified input and output effects are given and a series of constraint conditions are met, so that the mechanism performance is optimal.

The invention discloses a forming method of a high-speed wheel spoke plate, which further comprises a shaping die used in a shaping step, and the method comprises the following steps: 1) plate shearing and blanking are carried out, and a product blank is prepared from raw materials; (2) stretching forming is conducted, and a radial plate contour piece is manufactured through the product blank; 3) punching: punching a mounting hole and a middle hole in the radial plate contour piece; (4) flanging is conducted, specifically, the edge of the radial plate contour piece is flanged; 5) shaping; according to the method, the position precision of the middle hole and the chamfer of the product is remarkably improved. Cooperative shaping machining of chamfers, mounting holes, middle holes and turned-over edges is completed in the same working procedure through the shaping die. And through the synchronous shaping process, the runout control precision and the chamfering position degree of the radial plate are remarkably improved. According to the method, the production efficiency is greatly improved, accumulative errors are reduced, and high-quality and high-efficiency production of the high-speed wheel spoke plate is achieved.

The utility model discloses a walking steering device for a robot, which comprises a steering part connected to the bottom of the robot, and the bottom of the steering part is connected with a walking part. A joint motor with high-precision control is selected, meanwhile, a spigot assembly structure in the transmission process is designed, mechanical errors are controlled to the maximum degree, and therefore position changes of the robot can be accurately controlled no matter walking or steering is conducted. On the field unmanned plant protection equipment, in cooperation with Beidou navigation and image recognition technologies, the precision of the whole equipment in field operation can be controlled to the maximum extent, the damage rate of crops caused by equipment position deviation is greatly reduced, and meanwhile the operation completion rate is increased. The joint motor is matched with the walking machine frame, the overall width of the walking mechanism can be controlled to be small, and therefore the walking mechanism has better adaptability to different crops with different plant spacing and can be widely used and popularized.

A motor traction automatic control acceleration system comprises a motor, a runway, an automatic control system, a traction system, an acceleration vehicle, an unhooking system, a forced stop system, a weighing system and a measuring system, the motor is arranged on the runway, the automatic control system controls the motor to rotate, stop, rotate speed and tension, and the acceleration vehicle realizes directional movement through the traction system. The traction system comprises a steel wire rope, the steel wire rope connects a motor and an acceleration vehicle to form a series closed loop, the acceleration vehicle provides pulling force through the motor to achieve acceleration, the unhooking system comprises an unhooking traction tackle, the acceleration vehicle is connected with the steel wire rope through the unhooking traction tackle, and the forced stopping system is arranged at the end of a runway. The weighing system and the measuring system are arranged in a preparation area where the accelerated vehicle starts to park, and the weighing system and the measuring system are used for measuring the weight of the accelerated vehicle and the size of the vehicle type. The beneficial effects are that motor traction acceleration is good in stability and high in precision; whole-process mechanization increases efficiency; and vehicle acceleration is more stable.

The invention relates to the technical field of food packaging equipment, in particular to a double-channel blanking weighing mechanism which comprises a rack, a hopper and a weighing sensor, a first channel and a second channel are arranged at the top of the rack, feeding mesh belts are arranged in the first channel and the second channel, a detachable limiting stop block is further arranged in the second channel, and the hopper is arranged in the limiting stop block. The hopper is further internally provided with a horizontally-telescopic inserting plate, the hopper can form an opening and closing conducting structure through the inserting plate, the inserting plate is movably connected with the weight measuring sensor through a horizontal moving assembly, materials can be fed into the hopper in a large range in the first channel, the split charging gram weight is made to be close to the critical value or below, and the split charging gram weight is made to be smaller than the critical value. And then continuous single material transportation is carried out through the second channel until the gram weight enters the tolerance range, the alternate blanking effect of large-range blanking and small-range blanking can be achieved, the characteristic of small gram weight deviation is achieved, and precise control over the gram weight of the blueberries in the weighing and packaging link is facilitated.

The present invention discloses a controllable gain RCS active enhancement method and device, the method comprises performing geometric feature extraction and electromagnetic scattering feature extraction on a target three-dimensional CAD model, adopting a tensor network projection algorithm to fuse and generate joint feature characterization data, and performing feature dynamic update according to the target posture; according to the feature characterization data, a nonlinear model is established by adopting a multi-dimensional Lie algebra dynamic mapping, and a prediction model is generated by a chaotic system prediction algorithm; based on the prediction model, a control objective function is constructed by adopting a multi-objective constraint optimization algorithm, and an adaptive control strategy is generated by a hybrid control law synthesis algorithm; according to environmental parameters, an environmental disturbance compensator is used to perform real-time compensation, and control quantity conversion is realized by hardware constraint mapping. The present invention improves the RCS feature extraction accuracy and control response speed, and enhances the system environmental adaptability.

The utility model relates to the technical field of cranes, and discloses a calibration assembly tool for a telescopic boom body of a reach stacker. The telescopic arm body comprises a top plate, a bottom plate and two side plates connected with the top plate and the bottom plate. The alignment mechanism is fixedly arranged on the tool platform, and the alignment mechanism comprises two groups of adsorption devices which are oppositely arranged and are respectively used for adsorbing the two side plates; and the detection mechanism is connected with the adsorption device and is used for determining the relative distance to the left side plate and the right side plate. The calibration assembly tool can improve the production efficiency.

The utility model discloses a drilling soil sampling device for soil detection, which comprises a lifting plate, a lifting adjusting mechanism, an external rotation soil breaking mechanism and a mounting clamping mechanism, the lifting adjusting mechanism comprises a conical tooth assembly, a lead screw, a threaded plate, a bottom frame and a hinge lifting frame; the external rotation soil breaking mechanism comprises a conveying pipe, a lateral frame, a first motor, a second motor, an external rotation pipe, a transmission tooth assembly, an external rotation blade, a rotating shaft and a conveying blade, and stable lifting of a lifting plate is ensured through threaded fit of a bevel tooth assembly and a lead screw, so that the drilling depth is accurately controlled, high-precision control is provided for soil sampling, and the working efficiency is improved. The external rotation ground breaking mechanism effectively breaks ground by means of the rotation function of an external rotation pipe and external rotation blades, all assemblies can be rapidly connected and fixed through the design of a clamping pipe, a clamping rod, an external extension spring rod and the like of the installation clamping mechanism, and the detachability and maintenance convenience of the equipment are improved.

The invention provides a welding system for a liquid crystal display screen assembly, and relates to the technical field of laser welding, the welding system comprises a supporting table, a moving assembly, a frame-shaped supporting frame, a laser welding part and a feeding assembly; the supporting table is fixedly arranged in a projection area of a lining back plate of the liquid crystal display screen assembly and used for supporting a non-edge area of the lining back plate, so that the outer periphery of the lining back plate extends outwards and exceeds the supporting table, and a circle of suspended welding operation area is formed. Through the design that a center support is matched with a cantilever type frame-shaped supporting frame, the lower portion and the periphery of the whole welding area of a workpiece are not shielded by any clamp; one-time clamping is achieved, all welding is completed, and the welding efficiency is greatly improved; and when the welding position of the cantilever type frame-shaped supporting frame is converted, the laser welding part and the feeding assembly are always kept in high-precision alignment, the situation that a laser welding point and a connecting part are staggered is avoided, and the stability of the welding effect is guaranteed.

The invention discloses a multifunctional pressure cylinder welding-grinding device which comprises a mechanical main arm, a telescopic connecting rod, an outer weld joint grinding device, a molten pool detection camera, an infrared temperature detection device, a welding gun head, an electromagnetic induction heating device, a cylinder pressure container, a base device, a clamp, a telescopic shaft, an inner weld joint grinding device and a visual and sensing device. The infrared temperature detection device and the molten pool detection camera are connected through a connecting rod and located on the two sides of the head of the welding gun. The outer welding seam polishing device is connected with the welding machine main arm through a telescopic connecting rod; the inner welding seam polishing device is connected with the base device through a telescopic shaft, a cylinder clamp is arranged on the outer side of the telescopic shaft and used for fixing cylinders with different diameters, and the visual and sensing device is assembled on the telescopic shaft of the inner welding seam polishing device so that the condition of welding seams in the cylinders can be observed conveniently. Defects and temperature in the welding process can be monitored in real time, high-precision control over welding seam polishing is achieved, and the machining efficiency and the welding joint quality are improved.

This utility model relates to a closed electromagnet structure, belonging to the field of electrical control switch technology. It includes a housing, within which an electromagnet assembly penetrates one end face of the housing. The electromagnet assembly includes a moving iron core, with a coil frame nested between the moving iron core and the housing. A coil is mounted on the coil frame. A stationary iron core, sleeved with the coil frame, is located at the front end of the moving iron core. A push rod, threadedly fixed to the moving iron core, is located within the stationary iron core. One end of the push rod is threaded onto the moving iron core, forming a linkage between the push rod and the moving iron core. The other end of the push rod passes through the stationary iron core and protrudes outside the housing for outputting power. It has the advantages of simple structure, stable and reliable performance, convenient assembly, and long service life. By optimizing the magnetic circuit and mechanical structure, it can achieve fast response, high-precision control, and high-efficiency output.

The utility model relates to a quick release type accurately adjustable square and round buckle which comprises four mounting plates with T-shaped cross sections, each mounting plate comprises a transverse plate and a vertical plate perpendicular to the transverse plate, the four mounting plates are detachably connected end to end to form a square frame shape, and the vertical plates are located on the opposite inner sides of the square frame. A sawtooth-shaped limiting section is arranged between the first end and the middle of the transverse plate, and a limiting piece used for being limited to the adjacent limiting section is arranged at the second end of the transverse plate. According to the square and round buckle, the technical problem of low adjusting precision caused by large distance between two adjacent adjusting through holes of the square and round buckle in the prior art is solved. By means of the limiting section, the precision control is higher, the column formwork is positioned more accurately, original pin piece type fixing is omitted, the installation process is more convenient, meanwhile, pin piece loss is avoided, material loss and waste are avoided, the pressing handle and the installation round rod are matched to control lifting of the limiting plate to conduct disassembly operation, and the disassembly efficiency is improved. And the whole square and round buckle is more convenient and labor-saving to mount and dismount.

The present invention provides a bellows fatigue life detection system and detection method, which belongs to the field of bellows detection technology, and solves the problems of insufficient motion control accuracy, significant motion overshoot phenomenon and single test conditions in the detection process of traditional bellows fatigue life detection devices. The bellows fatigue life detection system of the present invention includes a truss, a bottom sliding unit is arranged at the bottom of the truss, a second air guide device is driven translationally on the bottom sliding unit, a first air guide device is arranged on one side of the truss, and a detection station is formed between the first air guide device and the second air guide device. The present invention can achieve high-precision positioning and control by using a bottom slide servo motor, a first slide servo motor and a second slide servo motor in conjunction with the application of an encoder; the design of the present invention takes into account different test requirements and environmental conditions, and can adapt to a wider range of test conditions by adjusting the slide position.

The utility model discloses a double-cantilever medical hollow fiber membrane curling device which comprises a spline transmission shaft, gear boxes, a rotating shaft, hobbing teeth and a base, a sliding rail is arranged on the base, a sliding block set is arranged on the front portion and the rear portion of the sliding rail respectively, a first gear box and a second gear box are installed on the front sliding block set and the rear sliding block set respectively, and the spline transmission shaft penetrates through the two gear boxes. A worm transmission structure is arranged in each gear box to transmit power of the spline transmission shaft to the rotating shaft, hobbing teeth are arranged on the rotating shaft, the two hobbing teeth on one side are opposite in rotating direction and meshed, a tow of the hollow fiber membrane is clamped between the two hobbing teeth to be bent, and corrugation pressing operation of the tow of the hollow fiber membrane is synchronously conducted from the two ends of the rotating shaft. And the balance of the rotating shaft is improved, meanwhile, the corrugation pressing efficiency can be improved, double-line operation is achieved, and layout can be more convenient for subsequent winding.

The invention relates to the technical field of micropore electric spark forming machining, in particular to a micropore electric spark forming machining device and method.The device comprises an electric spark machine tool spindle, a zero-point positioner, a zero-point positioning chuck and a device body, the zero-point positioner is installed at the tail end of the electric spark machine tool spindle, and one end of the zero-point positioning chuck is connected with the zero-point positioner; the device body is installed on the connecting shaft, and a wheel set formed by a first driven wheel and a second driven wheel, a wheel set formed by a third driven wheel and a driving wheel and a wheel set formed by a fourth driven wheel and a fifth driven wheel are arranged on the outer side face of the device body. Gaps for micro electrodes with the diameter smaller than 0.1 mm to pass through are formed between the first driven wheel and the second driven wheel, between the third driven wheel and the driving wheel and between the fourth driven wheel and the fifth driven wheel, a conductive clamping device is arranged at the tail end of the device body, and the micro electrodes penetrate through the gaps of the wheel sets and the conductive clamping device. Machining current is transmitted to the micro electrode through the electric spark machine tool spindle and the conductive clamping device.

The invention discloses a composite stamping device and method. Comprising an upper die plate (1) and a lower die plate (2), and an upper die core (3), a lower die core (4) and a fixing plate (5) are sequentially arranged between the upper die plate and the lower die plate from top to bottom; the lower end face of the upper die core (3) is a convex arc face, and the upper end face of the lower die core (4) is a concave arc face matched with the convex arc face. A punching punch (6) with the lower end protruding out of the convex arc face is arranged in the center of the convex arc face, a flanging ring groove (17) is formed in the convex arc face on the periphery of the outer circle face of the punching punch (6), and ribbing punching grooves (7) are distributed in the convex arc face on the periphery of the flanging ring groove (17) in the circumferential direction. A flanging via hole (8) is formed in the center of the concave arc surface, and ribbing via holes (9) are distributed in the concave arc surface around the flanging via hole (8) in the circumferential direction; a flanging bushing (10) is arranged in the center of the fixing plate (5), and ribbing punches (11) are distributed on the fixing plate (5) around the flanging bushing (10) in the circumferential direction; the flanging bushing (10) is connected with the flanging via hole (8) in a sliding manner; the ribbing punch (11) is connected with the ribbing through hole (9) in a sliding manner; the punching punch (6) and the flanging bushing (10) are coaxially arranged; and the ribbing punch (11) and the ribbing punching groove (7) are axially aligned along the flanging bushing (10). The combined machining device can meet batch production and has multiple functions of bending, ribbing, punching, hole flanging and the like.

The headlamp comprises: a lighting control unit (52) for controlling the emission timing of light emitted from a light source (31); and a rotation scanning unit (32) for repeatedly scanning the light of the light source while rotating, and illuminating a used area with the scanned light. The rotation scanning unit performs multiple repeated scans when rotating one circle. The lighting control unit comprises: a cycle detection unit (524) for detecting the rotation cycle of the rotation scanning unit; and a cycle division unit (525) for equally dividing the rotation cycle and controlling the emission timing of the light source. The lighting control unit controls the emission timing of the light source based on the rotation cycle and the divided cycle.

The application belongs to the technical field of robots, and discloses a scalable amphibious robot driven by a paddle wheel, which comprises a shell, four wheel shafts rotatably connected to the shell and distributed on the left and right sides of the shell, four independent driving mechanisms arranged in the shell, four driving mechanisms connected with the four wheel shafts to drive the wheels to rotate independently, a scalable paddle wheel mechanism contained in the wheel mechanism, the scalable paddle wheel comprising a wheel, an independent small wheel body, a plurality of paddle plates and a scalable mechanism; the scalable mechanism is used for the expansion and contraction of the paddle plates of the paddle wheel, so that the paddle plates of the paddle wheel can be retracted into the wheel and form an integral whole with the wheel, or be expanded into a paddle wheel mechanism and be used for rowing. The single power driving system is combined with the scalable paddle wheel structure, so that the rigidity and flexibility of the hub are ensured when the amphibious robot runs on land, and the energy utilization efficiency is improved when the amphibious robot sails on water.

The present invention discloses an unmanned aerial vehicle and a gimbal control method thereof, wherein the gimbal control method comprises a flight control system generating a yaw rate instruction of the unmanned aerial vehicle, and the gimbal control system controls the yaw axis motor of the gimbal according to the yaw rate instruction of the unmanned aerial vehicle. The present invention uses the flight control system and the gimbal control system to jointly control the gimbal yaw axis motor, maximizes the advantages of high-precision control and rapid response of the gimbal control system, utilizes the advantages to compensate for the deficiencies of the flight control system in yaw control, realizes stabilization of the gimbal yaw channel, and completely solves the jamming phenomenon of aerial video when the unmanned aerial vehicle yaws at low speed.

This invention discloses a control method and system for indirectly obtaining commutation signals based on BLDC terminal voltage, belonging to the field of brushless DC motor positionless control. The method includes: sampling the voltage of the floating phase at the current commutation point after a set electrical angle; sampling the voltage of the floating phase at the next detected zero-crossing point after the current commutation point; calculating the actual zero-crossing time using the linear relationship between the back electromotive force of the first and second sampling points; obtaining the lag compensation time from the zero-crossing point to the commutation point by combining the difference between the actual and detected zero-crossing times and the commutation reference time delay; sampling the same floating phase at an electrical angle interval of α after the current commutation point and at an electrical angle interval of (60°-α) after the turn-off point, summing the two samples, and determining whether the commutation is leading or lagging based on the result; and using a PI regulator to correct the lag compensation time in a closed loop. This invention is simple, practical, and can accurately obtain the commutation signal.

The invention relates to the field of double-phase titanium alloy electrochemical polishing, in particular to an environment-friendly electrochemical polishing solution for a double-phase titanium alloy and a polishing method of the environment-friendly electrochemical polishing solution. The titanium alloy comprises the following chemical elements in percentage by mass: 2.0-7.0% of Al; 1.5%-5% of V; the balance is Ti and unavoidable impurity elements such as O, N and H. The environment-friendly polishing solution comprises the following chemical components by mole percent: 0.5-2 mol / L of LiCl; 0.2 to 0.3 L of glycerol; 0.8 to 1 L of methanol; 0.1 to 0.3 L of glacial acetic acid; a small amount of ascorbic acid. According to the electrolytic polishing, alloy serves as an anode, a U-shaped titanium plate serves as a cathode, the voltage is 30-60 V, the current density is 0.5-2 A / cm < 2 >, and the polishing temperature is normal temperature. The method has the advantages that the environment-friendly electrolyte is adopted, the surface of the double-phase titanium alloy can be polished, pollution caused by traditional perchloric acid and fluoride system electrolyte is avoided, the follow-up repeated cleaning procedure is reduced, and material precision control is improved.

The invention relates to the technical field of gear surface grinding machining of aviation air door shaft type and limiting gear shaft type parts, in particular to a flexible inner and outer gear double-tooth-surface grinding device and machining method.The device comprises a manual reversing mechanism, a flexible double-face stress mechanism and a motor driving reciprocating mechanism; the device is high in machining efficiency, good in precision control, stable and reliable in quality and capable of meeting the high-precision machining requirement that the joint fork lugs with the rotation structures are produced in batches and cannot deform.

The utility model discloses an automatic hoop assembly line which is used for assembling and forming a hoop with two semicircular hoops and a square buckle and comprises a pre-forming mechanism and a forming and discharging mechanism which are arranged in a front-back matched mode. The pre-forming mechanism comprises a pre-arranging table, a pre-arranging supporting mold used for supporting a pre-forming piece for assembling the hoop is arranged on the pre-arranging table, the left side and the right side of the pre-arranging table are each provided with a semicircular hoop feeding device in a matched mode, and the front end of the pre-arranging table is provided with a square buckle feeding device in a matched mode. The forming and discharging mechanism comprises a double-station rotatable workbench, two stations are each detachably provided with a forming support, each forming support is of a cake-shaped structure, and a positioning pin is arranged at the top end of each cake-shaped structure. The clamp forming device is ingenious in structure and high in clamp assembling and forming speed, and when clamps of different sizes need to be produced, adaptability is good, and time and labor are saved.

The application discloses a self-cleaning method of a drain valve, the drain valve comprising a valve body, a valve core rotatably arranged in the valve body, and a valve sleeve covering the valve core, the valve core being provided with a liquid passing opening and a drain passage communicated with the liquid passing opening, the lower end of the drain passage being connected with a drain nozzle, the drain valve further comprising a water inlet passage, the water inlet passage being arranged independently of the valve core, one end of the water inlet passage being directed to the valve core, and the other end of the water inlet passage being provided with a water pump, the valve core being provided with a detection member, and the valve body being provided with a sensing element for sensing the detection member, the method comprising the following steps: detecting the motion position of the valve core; and according to the motion position of the valve core, controlling water to flow into the water inlet passage to flush the valve core and / or the valve sleeve. According to the application, the valve core and the valve sleeve can be flushed, water is controlled (such as water inlet time, water inlet rate, water inlet amount and the like) according to the detected motion position of the valve core, and the flushing effect of the drain valve can be improved.

The application relates to a kind of automobile injection molding piece zero-defect closed-loop control method and system based on digital twinning, relate to the high-precision intelligent manufacturing technical field of automobile injection molding piece, comprising: initialization and modeling stage, based on injection production data calibration mechanism model and train LSTM compensation model, construct digital twin; Real-time synchronization and control stage, using model predictive control MPC algorithm, based on real-time driven digital twin, the process parameters of future mode are rolled optimization and issued;Online learning and evolution stage, according to the actual and predicted size deviation of each mode, dynamically trigger the incremental training of LSTM model and the periodic fine-tuning of mechanism model;Abnormal self-healing stage, when size is out of tolerance, predicted defect or equipment anomaly, execute hierarchical parameter optimization, process switching or shutdown verification strategy.The advantage lies in that the production of automobile injection molding piece is changed from "after detection" to "before prediction and during regulation", and the key dimension qualified rate is stably improved to more than 99.5%.

The invention discloses a micro-fluidic device for preparing gas-water-oil-solid-raw multiphase multicomponent fluid, a micro-fluidic chip mainly comprises a micro-fluidic chip substrate layer, a thin film layer and a micro-fluidic chip upper layer, the substrate layer is provided with a plurality of multi-group sub-runners and a mixing runner connected with the plurality of multi-group sub-runners; the upper layer is provided with a plurality of multi-group sub-runners and storage pools, the thin film layer at the junction of the substrate layer runner and the upper layer runner is provided with a nozzle, and the injection pressure and the flow velocity are adjusted through an injection pump or a control system so as to dynamically adjust the mixed flow runner to prepare foam fluids with various diameters, so that the preparation of a multi-phase multi-group sub-runner is realized; dynamic adjustment of foam diameter, volume and proportion in multiphase and multicomponent fluids such as gas-water-oil-solid-production and the like and complex physical and chemical processes such as flow, mass transfer, heat transfer, reaction, erosion and precipitation of multiphase and multicomponent fluids are realized. The device can provide a basic test device for research in the fields of hydrology, oil gas, mine, carbon sequestration and the like.

The invention relates to a bolt and nut fastening device for automobile machining, which comprises a quick-insertion type locking mechanism, and the quick-insertion type locking mechanism comprises a locking motor, a locking main driving rod, a transition sleeve, a replacement transition rod and a disassembly sleeve; one end of the locking main driving rod is fixedly connected with the output end of the locking motor, the other end of the locking main driving rod is movably connected with the transition sleeve in a pluggable mode, and the end, away from the locking main driving rod, of the transition sleeve is fixedly connected with one end of the replacement transition rod. The end, away from the transition sleeve, of the replacement transition rod is movably connected with the dismounting sleeve in a pluggable mode. The anti-shearing force of the locking main driving rod can be effectively improved, the service life of the locking main driving rod is prolonged, the situation that accessories are replaced due to abrasion caused by frequent tangential force is improved, the accessory replacement cost is reduced, the accessory replacement convenience is improved, synchronous locking is achieved according to opposite angles fastened by bolts and nuts at different positions, and the locking effect is good. And the stress uniformity of part assembly in the automobile machining process is improved.

The application belongs to the technical field of active vibration isolation, and specifically discloses an active vibration isolation method and system based on prediction and adaptive control. The method comprises the following steps: performing multi-degree-of-freedom dynamic modeling on a vibration isolation system, taking the pose of a load as the system output, taking the control quantity of an actuator as the system input, and uniformly representing unknown dynamics caused by structural nonlinearity and disturbance as a nonlinear term; constructing an adaptive neural network state observer based on the dynamic model to estimate states that cannot be directly measured; collecting historical operation data of the vibration isolation system, constructing input time series and output time series after preprocessing the data, training a long short-term memory neural network prediction model, and generating a prediction signal representing future position information; designing an adaptive control law according to the state estimation result and the prediction signal, obtaining a feedback control quantity, superimposing the feedback control quantity with a feedforward control quantity obtained based on the prediction signal, and forming a control instruction for driving the actuator.

The application relates to the technical field of aviation SSPC circuit board assembly, and discloses an automatic assembly auxiliary device for a SSPC circuit board, which comprises a base and a positioning support frame installed on the base; the positioning support frame can realize the supporting and positioning functions of the SSPC circuit board, and can position the locking strips and fixing blocks required by the SSPC circuit board installation in the slots of the positioning support frame, so that the subsequent automatic tightening of the fixing screws is facilitated; elbow clamps are arranged on the two sides of the base and can fix the reinforcing ribs required by the SSPC circuit board installation. The technical problems of low assembly efficiency and incapability of meeting the requirements of mass production and assembly are solved. The required components of the SSPC circuit board can be positioned and fixed, so that the automatic assembly of the SSPC circuit board can be realized.