12results about How to "Realize drive control" patented technology

The present invention relates to a permanent magnet synchronous motor control method and system based on second-order auto-disturbance rejection control, which belongs to the field of permanent magnet synchronous motor control technology and solves the problems of poor robustness and weak anti-disturbance capability of traditional auto-disturbance rejection controllers. Based on the established d-q axis mathematical model of the permanent magnet synchronous motor, a state equation is obtained; a second-order auto-disturbance rejection controller is established; based on a model reference adaptive observer, an estimated speed ω of the permanent magnet synchronous motor is obtained. r ; Set the speed of the permanent magnet synchronous motor ω r and speed given value ω r * At the same time, input the second-order ADRC to obtain the q-axis voltage prediction value u q ; and, the result obtained by subtracting the d-axis current value of the permanent magnet synchronous motor from the reference value of the d-axis current is input into the PI controller to obtain the d-axis voltage prediction value u d ; The PWM control signal is obtained and input into the inverter connected to the permanent magnet synchronous motor to realize the drive control of the permanent magnet synchronous motor. The robustness and anti-interference ability of the controller are improved.

The invention relates to the technical field of spray irrigation spray guns, in particular to an irrigation spray gun with a self-adaptively adjustable elevation angle, which comprises a spray gun body, a connecting seat is detachably connected to the bottom of the spray gun body, a supporting mechanism is mounted at the bottom of the connecting seat, the supporting mechanism comprises a supporting seat, the supporting seat is arranged at the bottom of the connecting seat, and two supporting plates are mounted on the supporting seat. The two sides of the bottom of the connecting base are rotationally connected with the two supporting plates through fixing shafts, a through groove is formed in the bottom of the supporting base, a fixing sleeve is connected to the bottom of the connecting base and slidably connected with the interior of the through groove, three supporting rods are connected to the edge of the bottom of the supporting base, and an adjusting mechanism is installed at the bottom of the supporting base. Through control of the adjusting mechanism, driving control over the fixing sleeve is achieved, the fixing sleeve drives the connecting base to rotate at the top of the supporting base, then the elevation angle of the spray gun body is adjusted, spray irrigation on different positions is achieved, operation is more convenient, and the application range is wide.

The utility model relates to the technical field of continuous ion exchange, and discloses a switching mechanism. The switching mechanism comprises a rotor assembly, a stator assembly and a telescopic piece, the rotor assembly comprises a sleeve, a push block and a rotary disc; an accommodating cavity is formed in the sleeve; a plurality of convex ribs are arranged on the inner side wall of the sleeve, and deep grooves and shallow grooves are sequentially and alternately distributed among the convex ribs; a sliding block and ratchets are arranged on the push block; the sliding block is slidably arranged in the deep groove, and the ratchet is arranged at the end, close to the rotary disc, of the push block. The rotary disc is provided with a limiting block and a flow guide hole, and the limiting block is located in the deep groove or the shallow groove; the stator assembly is provided with a communication hole communicated with the flow guide hole. The telescopic piece drives the push block to push the rotary disc out of the position between the two adjacent convex ribs, the rotary disc is separated from rotation limiting of the convex ribs and guided by the ratchets, the rotary disc rotates by a certain angle, the overall structure does not need a motor or a speed reducer, longitudinal arrangement of the overall switching mechanism is achieved, the occupied space area is reduced, and the adaptability of equipment is improved.

This invention relates to the field of medical high-fidelity training model technology, and discloses a multi-vascular network biomimetic hemostasis model and method for junctional wounds. The model includes a biomimetic model, a blood bank system, a control system, and a temperature control unit. A biomimetic multi-vascular network is embedded in the junction area of ​​the biomimetic model, and a biomimetic wound opening is provided at the corresponding position of the biomimetic multi-vascular network. The input end of the biomimetic multi-vascular network is connected to the output end of the blood bank system, and the output end of the biomimetic multi-vascular network is located inside the biomimetic wound opening. The temperature control unit is located at the input end of the biomimetic multi-vascular network. A pressure sensor is provided in the biomimetic wound cavity wall of the biomimetic wound opening, and hemostatic material is filled inside the biomimetic wound opening, with the hemostatic material in contact with the pressure sensor. The control terminal of the control system is electrically connected to the blood bank system, the temperature control unit, and the pressure sensor. This invention can realistically simulate the bleeding process of penetrating and blind-tube injuries in the junctional wound of the simulation model, facilitating simulation training.

The utility model relates to the technical field of display devices, in particular to a vehicle roof vehicle-mounted screen and a vehicle. The vehicle roof vehicle-mounted screen comprises sliding rails, a screen assembly, a connecting rod and a telescopic device, the two sliding rails are used for being arranged on a vehicle roof in parallel at intervals, and sliding grooves are formed in one sides of the sliding rails in the horizontal direction; the screen assembly is arranged between the two sliding rails; the first ends of the connecting rods are provided with connecting shafts, the two connecting shafts are matched with the two sliding grooves in a sliding and rotating mode respectively, and the second ends of the two connecting rods are connected with the two opposite side edges of the screen assembly in a rotating mode respectively. The telescopic device is used for being installed on a vehicle ceiling, and the telescopic end of the telescopic device is rotationally connected with the pushing end at the top of the screen assembly. The connecting rod is rotationally connected with the sliding rail, the force arm of the telescopic device for pushing the screen assembly to rotate is prolonged, the screen assembly rotates more easily and can move and rotate at the same time, adjustment of the angle and distance of the screen assembly is achieved through a simple structure, and more complex adjustment requirements of passengers are met.

The utility model is applicable to the technical field of tobacco production, and provides a clamp of a mechanical fluidized bed for processing tobacco, which comprises a clamp seat clamped at the bottom of the fluidized bed and a clamping and locking plate adjustably arranged on the clamp seat, and the clamping and locking plate is positioned in the fluidized bed when locked. The clamping and locking plate can be buckled at the top of a reinforcing rib in the fluidized bed, so that the fluidized bed and the clamp seat are fixed; a plurality of positioning columns are inserted into the bottom of the fluidized bed and are connected with the clamp seat. According to the clamp of the mechanical fluidized bed for tobacco processing, the structure and the operation mode are simplified, and the problems that in the prior art, a clamp is complex in operation, the manual participation degree is high, and the fixing force is not easy to unify are solved.

The invention discloses a two-phase stepping motor PWM control method based on a three-phase inverter topological structure, and the method comprises the steps: connecting a DC bus voltage through employing the three-phase inverter topological structure, and connecting an a-phase winding and a b-phase winding of a two-phase stepping motor into the three-phase inverter topological structure in series. The on-off of each power switch device in the three-phase inverter topological structure is controlled through a PWM (Pulse Width Modulation) signal to realize the control of the two-phase stepping motor; the two-phase stepping motor driving control circuit has the advantages that the driving control of the two-phase stepping motor is realized by only adopting six power switch devices, and the hardware cost is relatively low.

The application discloses a kind of DFB laser control drive systems in the technical field of semiconductor laser, including drive circuit, radio frequency selection output ware, optical filter module, main control module, current filter module, monitoring module and DFB laser group, drive circuit is connected with DFB laser group and radio frequency selection output ware, DFB laser group is connected with monitoring module, monitoring module is connected with radio frequency selection output ware, radio frequency selection output ware is connected with optical filter module and main control module, main control module is connected with current filter module.The system of the application realizes accurate stable drive control to different wavelength DFB laser, can selectively open the laser signal output channel of a road;First, filter out the interference wavelength and noise in optical signal, remove low-frequency signal in output signal again, ensure the accuracy of output signal;Realize the data communication of circuit system and host computer, can display various data of circuit system in real time, and promptly analyze and process.

The invention relates to an electric heavy-load rail car which comprises a car frame. The two bogies are arranged at the bottom of the frame at intervals in the advancing direction of the electric heavy-load rail car, and each bogie is provided with a first wheel pair and a second wheel pair; the two traction motors are arranged on the frame in parallel; the battery pack is arranged on the frame and electrically connected with the two traction motors respectively; the transmission structures are arranged on the frame, penetrate through the frame and extend to the position between the two bogies, the input ends of the transmission structures are connected with the two traction motors, and the output ends of the two transmission structures are in transmission connection with the two bogies. Two traction motors are adopted to increase the traction force of the electric heavy-load rail car, so that the electric heavy-load rail car is strong in power, the bogie runs stably and reliably, each bogie supports the electric heavy-load rail car on a rail through a first wheel pair and a second wheel pair, the enough bearing capacity is achieved, the pollution problem can be effectively avoided, and the electric heavy-load rail car is suitable for large-scale popularization and application. And the device has the characteristics of low noise and high running speed.

The invention discloses a micro-nano robot driving control device, and relates to the technical field of micro-nano robot driving control, the micro-nano robot driving control device comprises a plurality of ultrasonic driving units, a driving cavity is enclosed by the plurality of ultrasonic driving units, and the interior of the driving cavity is used for placing a micro-nano robot. And each ultrasonic driving unit can radiate ultrasonic waves into the driving cavity and can act on the micro-nano robot. The micro-nano robot driving and controlling device provided by the invention is convenient for driving and controlling the micro-nano robot. The invention further provides a preparation method of the micro-nano robot driving control device.

The invention relates to the technical field of petroleum transportation, in particular to a petroleum mechanical sealing device which comprises a mounting seat, a control mechanism is mounted on the mounting seat, a driving mechanism is mounted on the control mechanism, a discharging mechanism is mounted at the bottom of the mounting seat, and a sealing mechanism is mounted on the control mechanism. Protection mechanisms are mounted at the two ends of the mounting seat, and locking mechanisms are mounted in the two ends of the mounting seat; through cooperative installation of the control mechanism and the installation base, on-off control over a pipeline is facilitated, disassembly, assembly and maintenance are facilitated, the sealing effect on the interior of the control mechanism is good through the sealing mechanism, meanwhile, follow-up maintenance is facilitated, the control mechanism is conveniently driven and controlled through the driving mechanism, and residual oil liquid is conveniently guided out through the discharging mechanism; closing protection during maintenance of the two ends of the mounting base is achieved through the protection mechanism, driving control over the locking mechanism is achieved through work of the protection mechanism, and the locking mechanism conducts locking protection on the control mechanism.

The utility model discloses a crystal unloading furnace which comprises a bottom plate, an operation table, a lifting mechanism, a rotating mechanism, a clamping and cutting mechanism, a lifting rod, a seed crystal chuck, an annealing furnace and a control box. According to the crystal unloading furnace, the lifting mechanism is used for driving the rotating mechanism, the lifting rod, the seed crystal chuck and the seed crystal rod to lift, so that crystals at the lower end of the seed crystal rod can freely enter and exit from the annealing furnace under the control; the lifting rod, the seed crystal chuck and the seed crystal rod are driven by the rotating mechanism to rotate, so that the crystal at the lower end of the seed crystal rod can rotate in the annealing furnace, the crystal is uniformly heated in the annealing furnace, and annealing treatment is realized; the clamping and cutting mechanism is used for cutting off a seed crystal rod, unloading of processed crystals is achieved, traditional manual shearing is replaced with mechanical shearing, operation of workers is not needed, and unloading safety is improved; and a signal is sent to the controller through the key panel, so that the driving control on the lifting mechanism, the rotating mechanism, the clamping and cutting mechanism and the annealing furnace is realized.