13results about How to "Improve precision control" patented technology

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.

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 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.

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 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 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 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 discloses an industrial robot control method, device and equipment and a storage medium, relates to the technical field of intelligent control, and comprises the following steps: acquiring physical characteristic data and a preset performance index of an industrial robot; constructing a constrained system model of the industrial robot according to the physical characteristic data and the preset performance index; performing equivalent system conversion on the constrained system model to obtain an unconstrained system model; constructing a Hamilton-Jacobi-Bellman equation according to the unconstrained system model and an optimal control strategy of the industrial robot; and solving the Hamilton-Jacobi-Bellman equation by using an adaptive dynamic programming method to obtain an optimal control law, so that the industrial robot is controlled according to the optimal control law. The application solves the problem that the existing industrial robot control method cannot realize optimal control while meeting the constraint of the preset performance index, and realizes high-precision control of the industrial robot.

The application relates to the technical field of electric vehicles, in particular to a control method and device of an active air intake grille, a vehicle, a medium and a program product, wherein the method comprises the following steps: obtaining current environment information and actual working condition information of the vehicle; calculating energy consumption yield of wind resistance reduction and energy consumption increase of a thermal management system according to the current environment information and the actual working condition information; predicting a driving working condition of the vehicle in a preset time length, and generating a target opening degree of the active air intake grille based on the energy consumption yield, the energy consumption increase, actual temperatures of each assembly component of the vehicle and the driving working condition, so that the active air intake grille is controlled to be opened to the target opening degree. Therefore, the control method in the related art cannot exert the maximum energy-saving effect of the active air intake grille, cannot effectively make a better control strategy when facing complex environments and working conditions, is difficult to meet the control requirements of the active air intake grille, and has low precision, low user experience and low stickiness.

The utility model discloses an embodiment relates to a kind of lifting movement mechanism of three comprehensive test box, box fixed bracket is set below the lifting movement mechanism of three comprehensive test box;Test box body is fixed above box fixed bracket;The whole of fixed test box body and box fixed bracket is placed in screw fixed frame;Horizontal moving platform is fixedly connected at the bottom of screw fixed frame;Driving device is fixed in box fixed bracket;Turbine screw lifting machine assembly is set in screw fixed frame;Driving device drives turbine screw lifting machine assembly synchronous lifting operation to lift box, its advantage is that: stable structure, stable operation, little by environmental factor, support greater load, lifting height is higher, with certain self-locking capacity, and precision control is high, structure is simple, solve in prior art, the technical problem of unstable operation, volume and load restriction, maintenance complex, potential leakage risk of traditional hydraulic scissor brace.

The application provides an assembly process for reinforcing a target machine, relates to the technical field of composite material target machine body assembly, and comprises the following steps: the assembly process is used for assembling the reinforcing target machine through an assembly tool, the assembly tool comprises a lower fixing device, an upper fixing device, a mold closing device, a wing positioning device, a horizontal tail positioning device and a fuselage limiting device, and the assembly process comprises the following steps: pretreating the upper fuselage skin and the lower fuselage skin after demolding; positioning the lower fixing device and the fuselage limiting device through positioning pins, connecting them through bolts and reserving a 5mm clamping gap, and placing the pretreated lower fuselage skin into the lower fixing device. The application provides an assembly process for reinforcing a target machine, effectively reduces the total artificial consumption in the assembly process, has high overall strength and high use reliability, and does not need subsequent secondary grinding.

This utility model discloses an installation and alignment device for T-bolts on large equipment foundations, belonging to the field of concrete foundation technology, and mainly used for the installation of large equipment foundations. The technical problem to be solved by this utility model is to provide an installation and alignment device for T-bolts on large equipment foundations, including a vertically arranged support column to enclose and form a T-bolt sleeve installation cavity. A T-bolt sleeve is provided inside the installation cavity. The support column includes a pre-embedded section and an extension section. The pre-embedded section is located within the secondary poured concrete, and a tie beam is provided between two adjacent pre-embedded sections at intervals along its length. One side of the T-bolt sleeve is fixedly connected to the tie beam. The extension section is located above the secondary poured concrete, and a alignment frame beam for hanging alignment lines is provided between two adjacent extension sections. This device can both fix the installation position of the T-bolt sleeve and be used as an alignment frame for aligning the T-bolt sleeve, improving installation accuracy and reducing material consumption.