1485 results about "Deflection angle" patented technology

The invention discloses a control method and a control system for magnetic steel polishing, and relates to the technical field of polishing control, and the control method comprises the following steps: setting a magnetic steel positioning center coordinate and a polishing reference point, and configuring a polishing control path; a preset fixed position and a preset fixed posture are collected, and initial polishing process parameters are set in combination with the polishing control path; setting a magnetic steel polishing virtual environment, collecting pressure distribution simulation data of a polishing contact surface, dynamically correcting the feeding speed and the axial deflection angle of a polishing head, establishing a nonlinear mapping model, and adaptively adjusting the polishing power; and a laser contour scanning plug-in is arranged at the tail end of the polishing path, the simulated curved surface and the actually-measured point cloud data are compared for simulation compensation, and a polishing process parameter set is output to execute batch machining control. The technical problems that in the prior art, the grinding precision is not high, and technological parameters are not flexible to adjust are solved, and the technical effects of improving the grinding precision and achieving intelligent optimization of the technological parameters are achieved.

The invention relates to the field of cableway transportation safety control, in particular to a cableway lift carriage operation deflection attitude monitoring device and a control method, and the method comprises the steps: collecting the position, speed, attitude angle and local micro deflection disturbance information of a lift carriage in real time by constructing a multi-mode sensing network; the frequency of the sensor is dynamically adjusted by adopting an adaptive sampling mechanism, and space-time alignment and fusion of heterogeneous data are completed in combination with dynamic time warping and minimum mean square estimation; strengthening the key disturbance dimension based on a disturbance-driven attention mechanism, and predicting a future deflection angle sequence; a decoupling torque is generated through spatial deflection vector field modeling, regional coupling tensor analysis and a dynamic direction alignment matrix, and power consumption constraint and a dynamic environment parameter optimization control instruction are fused; and finally, driving the quadrilateral moment gyroscope to execute correction, and constructing a multi-dimensional evaluation index based on the attitude response residual error. According to the method, adaptive closed-loop adjustment of the control strategy is realized, and the robustness under wind speed disturbance and load variation is improved.

The invention discloses a textile production defect detection method and system based on image processing, and belongs to the field of textile defect detection. According to the method, the point cloud data is generated by collecting the surface deformation stripes, and the penetrability reflection signal containing the sound wave propagation time is obtained through the multi-frequency ultrasonic probe. Denoising the point cloud data and then positioning a surface deformation candidate area based on a curvature gradient and a normal vector deflection angle; and an internal abnormal region is determined by separating and extracting a reflection wave amplitude value and a time delay parameter through an ultrasonic frequency band. And matching the surface point cloud coordinates with the ultrasonic propagation time by adopting an iterative nearest point algorithm to establish feature association between the normal vector deflection angle and the reflected wave amplitude. And dynamically distributing fusion weights for the surface features and the internal features according to the curvature gradient change rate and the amplitude attenuation rate to generate a multi-modal defect distribution diagram. And geometric shape and reflection intensity parameters are extracted and matched with a preset defect template to realize type and position judgment, and the method can be suitable for production defect detection of the thick textile with a multi-layer composite material structure.

The invention discloses a laser channel atmospheric turbulence fading real-time compensation device and method based on a galvanometer system, and the method comprises the steps: enabling an incident light beam to irradiate a transparent PCB integrated with a photodiode array after the incident light beam is focused through a convex lens, obtaining the light intensity distribution of a current light spot through the photodiode array, and transmitting the light intensity distribution to a signal processing unit; the signal processing unit coarsely adjusts the deviation direction of the light spots according to the received light intensity distribution data, and aligns the part with the strongest light intensity in the light spots to the end face of the optical fiber; and based on the roughly adjusted light spot deviation direction, the signal processing unit dynamically adjusts the deflection angle of the galvanometer by using a gradient descent method according to the power measurement value of the receiving coupling module, so that the fine adjustment of the light spot deviation direction is realized, and the receiving coupling power is maximized. The objective of receiving optical power maximization is achieved, optical design, electronic control and algorithm optimization are combined, and atmospheric turbulence compensation with high cost performance is achieved.

The invention discloses a rotating mirror system target tracking method for optical flow auxiliary prediction, and the method comprises the steps: obtaining a target image in real time through a rotating mirror system, and dividing the image into a plurality of regions through uniform grid division; and based on the image gray values of the current frame and the previous frame, matching each region by adopting a mean shift algorithm to obtain an initial center coordinate and an optical flow vector. And the optical flow vector is iteratively optimized, so that the luminosity consistency error is minimized, and the accurate target position and motion information are obtained. And predicting the target position of the next frame according to the target position and the optical flow component thereof, and correcting the deflection angle in combination with the optical flow residual error. According to the method, efficient target tracking can be carried out in a complex dynamic environment, and continuous and accurate positioning of the rotating mirror system on the target is ensured. By adopting the method, the target tracking precision and the system response speed can be remarkably improved, the robustness and the real-time performance are high, and the method is suitable for high-precision target tracking application.

The invention relates to a calibration method, device and equipment of a laser scanning galvanometer performance detection device. The method comprises the steps that a laser is controlled to emit laser, a rotating table and / or a scanning galvanometer are / is controlled to rotate until a position sensitive detector detects that a light spot of the laser is located at a preset zero point position, and the deflection angle of the rotating table is determined as an initial angle; determining an angle range based on the initial angle and a preset angle, controlling the rotating table to rotate in the angle range, and obtaining light spot positions detected by the position sensitive detectors at multiple angles in the angle range; based on the light spot positions at the multiple angles, calibration parameters in the target calibration function are solved; the solved target calibration function is used for carrying out performance detection on the scanning galvanometer. By adopting the method, the laser scanning galvanometer performance detection device can be automatically calibrated.

The invention discloses a pipeline flange butt joint method based on multi-sensor cooperation and a storage medium, and the method comprises the following steps: when a mechanical arm carries a movable pipeline to approach a fixed pipeline, a magnetic encoder is utilized to detect the axial relative deflection angle of the pipeline, and the mechanical arm is controlled to adjust the axial posture of the movable pipeline to realize axial alignment. Under the axial alignment condition, the mechanical arm moves horizontally, the laser distance measuring sensor measures the linear distance, and meanwhile the axial deviation is continuously corrected by combining data of the magnetic encoder. And after the linear distance meets a preset threshold value, the industrial camera collects images of the movable pipeline flange and the fixed pipeline flange, a bolt hole coordinate set is recognized through an image processing algorithm, the rotating angle of the mechanical arm is calculated, the mechanical arm is controlled to rotate, bolt holes of the two flanges are accurately aligned, and butt joint is completed. According to the method, precise positioning of the pipeline flange in the axial direction, the plane direction and the rotating direction is achieved through closed-loop cooperation of the magnetic encoder, the laser ranging device and the visual sensor, and the butt joint precision and reliability are improved.

This system and method of for providing a tunable orbital angular momentum system for providing higher order Bessel beams comprising: an acousto-optical deflector configured to receive an input beam, deflect a first portion of the input beam a first deflection angle relative to an axis of propagation and along an optical axis and deflect a second portion of the input beam a second deflection angle relative to the optical axis; a line generator disposed along the optical angle for receiving the first portion and the second portion of the input beam and provide an elliptical Gaussian mean; a log-polar optics assembly disposed along the optical angle for receiving the elliptical Gaussian beam and wrapping the elliptical Gaussian beam with an asymmetric ring; and, a Fourier lens configured to receive the wrapped elliptical Gaussian beam.

The invention discloses an S-wave seismic phase first arrival identification method based on actually measured blasting-induced particle vibration signals, and relates to the field of negative effect monitoring and safety evaluation of blasting vibration induced by rock blasting excavation, and the method comprises the steps: determining a blasting scheme based on a scanning result; arranging a blasting vibration sensor; acquiring actual measurement waveforms of blasting vibration at different blasting center distances; constructing an S-wave seismic phase first arrival recognition function; and obtaining the first arrival moments of the S-wave seismic phases of the actually measured vibration waveforms at different explosion center distances. Compared with the prior art that the recognition precision of the S wave of the blasting vibration signal under the engineering scale is low and the like, by comprehensively utilizing the differences of the S wave, a noise signal, a P wave and a P wave tail wave in the aspects of energy, frequency, polarization characteristics and the like, recognition parameters such as the ratio of transverse energy to total energy, the polarization degree and the deflection angle are introduced, and the transverse energy serves as a weight coefficient; an S-wave recognition function suitable for actual measurement of blasting vibration is provided, and the technology has the advantages of small recognition error, high efficiency and the like.

The invention relates to a sight angle rate extraction method based on depth target tracking, and relates to the field of navigation control and computer vision. Comprising the steps of deploying a variable-focus optical camera on an unmanned aerial vehicle, and setting a normal of the center of a mirror surface of the camera to be inclined at a certain angle with a horizontal plane for acquiring complete information of a target; calibrating the target in the camera based on an optical parameter calibration method, and obtaining a field angle of the target relative to the center of the camera; deploying a target tracking algorithm on the unmanned aerial vehicle, and identifying a target position based on the target tracking algorithm; obtaining a horizontal deflection angle and a pitching deflection angle of the target relative to the center of the camera by combining a target position identified by a target tracking algorithm based on the field angle; and estimating the line-of-sight angular rate through Kalman filtering based on the obtained horizontal deflection angle, the obtained pitching deflection angle and the flight parameters of the unmanned aerial vehicle. Through combination of parameter calibration of the optical camera and a target tracking algorithm based on deep learning, the horizontal deflection angle and the pitching deflection angle of the target can be accurately obtained.

The invention discloses an aircraft front wheel electrical zero calibration method, device and equipment and a medium, relates to the technical field of aircraft front wheel control, is applied to ground comprehensive maintenance equipment, and comprises the steps that a target angle instruction is used for controlling a scale line of a rotating sleeve in a nose landing gear to be aligned with a scale line of a front supporting column outer cylinder; a front wheel shimmy damping instruction is sent to a front wheel operation control box of the aircraft, so that the front wheel operation control box controls front wheels to keep stable; the current angle information of the front wheel angle sensor is determined as current electrical zero position reference information; the front wheel and the rotating sleeve are controlled to rotate through a front wheel rotating instruction, and if the deflection angle of the scale mark of the rotating sleeve is matched with the front wheel rotating instruction, it is judged that front wheel electrical zero calibration of the aircraft is completed. And the accuracy and simplicity of the electrical zero calibration of the airplane front wheel are improved.

The invention discloses a three-degree-of-freedom measurement method based on a planar two-dimensional time grating sensor, and the method comprises the following steps: enabling a movable ruler base body and a fixed ruler base body to be installed in a parallel and opposite manner, and leaving a certain gap between the movable ruler base body and the fixed ruler base body; after same-frequency and equal-amplitude sine excitation signals with the phase difference of pi / 2 are applied to the four-phase excitation electrode groups on the fixed ruler base body respectively, the movable ruler base body moves in the X direction and the Y direction and deflects around the Z axis relative to the fixed ruler base body; the single sensing unit on the movable ruler base body can solve output signals deflecting in the X direction and the Y direction and around the axis, the output signals of all the sensing units are subjected to combined operation, and displacement values of the movable ruler base body in the X direction and the Y direction and the deflection angle theta can be decoupled. According to the method, displacement measurement in the X direction, the Y direction and the deflection angle around the Z axis can be achieved through combined calculation between the induction units on the movable ruler base body, the calculation speed is high, interference can be further eliminated, and the measurement precision is improved.

The invention relates to the technical field of bag-type dust removers, and particularly discloses a high-efficiency low-heat-loss bag-type dust remover which comprises a dust remover body and further comprises a detection assembly arranged on one side of the dust remover body and used for detecting the gas pressure difference of the two sides of a bag according to the deflection angle. Through the detection assembly, the gas pressure difference on the two sides of the cloth bag can be converted into the deflection angle of the pressing rod for detection, and according to the deflection angle, detected by the detection assembly, of the pressing rod, when the deflection angle of the pressing rod reaches a limit value, the triggering assembly can automatically control the dust removing assembly to remove dust on the surface of the cloth bag; the trigger assembly can also automatically adjust the trigger limit value of the detection assembly according to the humidity condition of the dust-containing gas, the cleaning strength of the dust removal assembly can be adjusted according to the humidity of the dust-containing gas through the regulation and control assembly, the dust stripping effect is improved, the cleaning effect on the cloth bag can be improved, and the subsequent filtering efficiency of the cloth bag can be improved.

The invention discloses a visual labeling mechanism device and an automatic labeling method thereof, and the method comprises the steps: obtaining a workpiece surface image in motion in real time through a visual assembly, extracting a pose parameter of a workpiece in combination with an image processing algorithm, generating a pose data set containing a coordinate parameter and a deflection angle, and inputting a motion prediction model. Calculating a future movement track of the workpiece in combination with the speed parameter of the conveying line, and generating an adjustment instruction set of the labeling head; the movement track of the multi-axis mechanical arm is controlled based on the adjusting instruction set, the attaching pressure of the label contact face is adjusted through the pressure feedback module, and labeling operation of the curved surface of the workpiece is completed; a line scanning camera module is used for scanning the geometric position of the labeled label, a real-time detection result is generated by comparing the geometric position with a preset quality standard, a compensation signal is triggered if position deviation exists, and compensation operation is conducted through a compensation pressure head so as to ensure that the labeling quality meets the preset standard; and through cooperative control of visual identification, track prediction and compensation, the stability and the fitting precision of dynamic labeling are effectively improved.

The invention relates to the technical field of underwater robot control, in particular to an autonomous line patrol motion control method of an underwater cable detection robot, which comprises the following steps of: establishing a six-degree-of-freedom kinematics equation and a kinetic model of the robot, and collecting position information of the robot and a current heading angle of the robot; the target heading angle of the robot is calculated through an optimal deflection angle fusion algorithm, the current heading angle, collected by a sensor, of the robot is compared with the target heading angle, an error epsi is obtained, and the error epsi is added into a single-ring PID algorithm for adjustment; and controlling the thrust and direction of a propeller in the underwater cable detection robot according to a control signal tau (t) output by the single-loop PID algorithm and robot position information, judging whether a target heading angle of the underwater cable detection robot is consistent with a current heading angle, if so, completing autonomous line patrol, otherwise, continuing to correct, and if not, completing the detection of the underwater cable detection robot. The attitude control precision and the path navigation stability of the robot in the underwater environment are improved.

The invention discloses a leveling device and leveling equipment, relates to the technical field of mine blast hole environment detection, and aims to solve the technical problem that the accuracy of a detection result is affected as an existing hole environment detection device is easily in an inclined state during use. The leveling device comprises a base, an adjusting assembly, a mounting frame, a gradienter and a control module, wherein the adjusting assembly is connected with the base; the mounting frame is connected with the hole environment detection device, the gradienter is arranged on the mounting frame, and the mounting frame is in transmission connection with the adjusting assembly; the control module is electrically connected with the gradienter and the adjusting assembly. The leveling device is connected with the hole environment detection device through the mounting frame, the control module can automatically drive the adjusting assembly to adjust the space posture of the mounting frame according to the deflection angle data fed back by the gradienter, it is ensured that the mounting frame is always kept in the horizontal state, and the posture of the hole environment detection device is synchronously corrected; and the detection result accuracy of the hole environment detection device is improved.

The invention provides a vector nozzle, a multi-degree-of-freedom vector nozzle and an aircraft, the vector nozzle comprises a first air injection section, a second air injection section and a third air injection section, the first end of the first air injection section is provided with a convex ring; an annular groove is formed in the first end of the second air injection section; the rack and the driving gear are meshed with each other, the rack is fixed on the outer surface of one of the first air injection section and the second air injection section, and the driving gear is fixed on the outer surface of the other one of the first air injection section and the second air injection section through a base; the protruding ring is clamped in the annular groove, and at least one set of balls are arranged between a plurality of sets of faces, directly opposite to the annular groove, of the protruding ring. And a deflection angle exists between the axis of the air inlet and the axis of the air outlet of at least one of the first air injection section and the second air injection section. According to the vector nozzle, the air injection direction of an engine can be changed.

The invention relates to a prediction backstepping control method for a hypersonic flight vehicle. The method comprises the following steps: S1, constructing a mathematical model of the hypersonic flight vehicle; s2, decoupling the mathematical model of the hypersonic aircraft into a speed subsystem and a height subsystem; s3, taking the weighted sum of the speed tracking error and the accelerator opening degree as an optimization performance index, and solving through the speed subsystem to obtain the accelerator opening degree of the hypersonic aircraft; s4, designing a prediction backstepping controller for the height subsystem, and solving the rudder deflection angle of the hypersonic aircraft through the prediction backstepping controller by taking the weighted sum of the height tracking error and the trajectory inclination angle as an optimization performance index; and S5, the hypersonic aircraft is controlled according to the rudder deflection angle and the accelerator opening degree.

The invention discloses an April Tag positioning and attitude resolving method based on an LM algorithm, and belongs to the technical field of computer vision, and the method comprises the following steps: 1) carrying out camera calibration on a camera for positioning; 2) an April Tag graph is arranged on a carrier plane needing to be positioned, and a camera is used for shooting; (3) the shot April Tag image is subjected to preprocessing; 4) analyzing the preprocessed April Tag graph, and marking the image; 5) carrying out preliminary attitude calculation on the image; 6) performing iteration by using an LM algorithm; and 7) constructing a three-dimensional coordinate system for representing the attitude of the camera, drawing an arrow on the image, and displaying the deflection direction of the arrow and the camera. The method has the beneficial effects that the attitude calculation result is more accurate by using the LM algorithm for iteration, and the accuracy of the attitude calculation is improved by calculating and drawing the arrow of the deflection angle. And the deflection difference between the direction of the carrier on a two-dimensional plane and the positive direction of the camera can be more intuitively and conveniently seen.

The utility model discloses a collimator for optical instrument parallelism adjustment, which relates to the technical field of optical instrument detection equipment and comprises a laser generator and a cylinder fixedly connected to the output end of the laser generator, a frame is slidably connected to the inner arc wall of the cylinder, and a convex lens is coaxially arranged on the inner side of the frame. The outer arc wall of the convex lens is slidably connected with four fixing seats which are distributed in an annular array, and the ends, away from the convex lens, of the fixing seats are rotatably connected to the inner arc wall of the frame body; according to the utility model, the deflection angle of the lens is adjusted through the plurality of first adjusting knobs, the direction of a light beam output by the laser generator after being refracted by the lens can be finely adjusted, so that the light beam can more accurately point to a target position, and the second adjusting knob enables the lens to axially move so as to adjust the focusing position of the light beam. It is ensured that the light beam forms a clear focus at the target position, meanwhile, the adjustable lens can eliminate light beam deflection caused by manufacturing or assembling errors, and therefore the adjustment and calibration precision is improved.

The invention discloses a distance measurement system based on artificial intelligence, and the system can achieve the automatic grabbing of size parameters of glasses. According to the system, a camera is adopted to capture a glasses image, a gyroscope and an artificial intelligence algorithm are adopted to recognize the spatial position of glasses, spatial coordinates of feature points are obtained, the pixel scale # imgabs0 # of the image is obtained subsequently based on the physical geometrical relationship of the glasses and the real pupil distance of a user, and finally the size parameters of the glasses are obtained. The glasses parameters comprise a glasses width, a pupil distance, a front inclination angle, a surface bending angle and a glasses-eye distance; the camera is an apple panel built-in camera; the gyroscope can obtain the pitch angle # imgabs1 #, the deflection angle # imgabs2 # and the inclination angle # imgabs3 #, so that the head posture of a glasses wearer is obtained, and the size measurement precision of the glasses is greatly improved. According to the system, automatic measurement of glasses parameters is realized, the working intensity of manual glasses matching is greatly reduced, and digital upgrading of high-end customized glasses is realized.

The present invention discloses a continuity detection device for columnar parts, and relates to the technical field of columnar parts detection devices; it comprises a mounting base, on which a conveyor chain conveying mechanism for conveying columnar parts is mounted, and a diameter detection mechanism and a length detection mechanism are arranged on the conveying path of the conveyor chain conveying mechanism. The present invention arranges a conveyor chain conveying mechanism and a diameter detection mechanism, and when in use, the columnar parts are placed on the inner side of the V-shaped plate of the first connecting frame, and the first chain driving motor drives the first conveyor chain to move, so as to realize the conveying of the columnar parts. During the process, the columnar parts contact with the shifting plate, and the shifting plate is deflected, and the angle sensor detects the deflection angle; the present invention can quickly and continuously detect columnar parts of different sizes, and is convenient for loading and unloading, and does not require complicated fixation of the columnar parts, thereby improving the detection efficiency and practicality.

The invention discloses an all-dimensional deviation preventing device for mine geological drilling, and relates to the technical field of mine geological drilling, the all-dimensional deviation preventing device comprises a drilling frame, a plurality of fixing frames are fixedly connected to the peripheral edge of the drilling frame, and a plurality of mounting plates are fixedly connected to the positions, close to the fixing frames, of the peripheral edge of the drilling frame; the top of the fixing frame is fixedly connected with a fixing shell and an auxiliary shell, and rails are arranged on the inner walls of the bottoms of the fixing shell and the auxiliary shell. According to the all-dimensional anti-deviation device for mine geological drilling, after the angle box rotates, parallel infrared rays generated by the multiple infrared emitters on one side of the angle box vertically irradiate the surface of the detection plate, and after photosensitive sensors at different positions detect signals, the angle box is turned on; the deflection angle of the angle box is detected by comparing signal positions, so that the inclination angle change of the drilling pipe in a three-dimensional space is detected at any time, and the effect of detecting whether the angle of the drilling pipe deviates or not at any time in the mine drilling process is achieved.

The invention provides a laser welding method for an unequal-thickness heterogeneous hot-formed steel joint by cooperatively regulating and controlling annular light spots and light beam deflection. The method comprises the following steps: firstly, pretreating, clamping and positioning the PHS1500 and PHS2000 unequal-thickness ultrahigh-strength steel plates; then, the deflection angle of the light beam is adjusted to be within the range of-30 degrees to + 30 degrees; and finally, a galvanometer control system is used for driving a laser beam to conduct swing scanning in a circular track, and welding is completed under the condition that parameters such as laser power, welding speed, swing frequency, the ratio of swing amplitude to core ring energy and the like are set. According to the method, wire filling is not needed, the PHS1500 and PHS2000 butt welding joints can be effectively connected within the light beam deflection angle range of-30 degrees to + 30 degrees, efficient connection can be achieved within the light beam deflection angle range of-20 degrees to + 20 degrees, weld joint forming is effectively improved, weld joint grains are refined, and the problems of stress concentration and welding softening areas caused by different thicknesses and different strengths of plates are solved. And within the light beam deflection angle range of-20 degrees to + 20 degrees, the obtained joint welding seam is well formed, the tensile strength can reach 1400 MPa or above, and the method is suitable for manufacturing the tailor-welded structure of the unequal-thickness plates of the automobile body.

The utility model belongs to the technical field of aeronautical manufacturing, and relates to a quick sampling device for a combined support, which is characterized in that the center of a bottom plate and support positions on two sides are hollowed-out, through holes are drilled in the bottoms of supports, and arc-shaped grooves are formed in the tops; the two supports are inserted into the hollowed-out positions of the two sides of the bottom plate respectively, a slotted hole is formed in the center of the swing frame, threaded shafts A are symmetrically and coaxially welded to the upper ends of the two sides, pin shafts are symmetrically and coaxially welded to the lower ends of the two sides, the symmetrical threaded shafts A penetrate through arc-shaped grooves in the supports respectively, and the symmetrical pin shafts penetrate through through holes in the bottoms of the supports respectively. One side of the support arm is connected with the slotted hole through a welded threaded shaft B and fixed through a nut, the other side of the support arm is provided with mounting holes, the mounting holes in the four flexible support positioners are connected with the fixing pin holes of the model frame respectively, and the fixing positions and deflection angles of the support positioners are adjusted. Therefore, the whole finished fixing support can be manufactured at a time, working efficiency is improved, and sampling waiting time is shortened.

The invention belongs to the technical field of flight mechanics, and particularly relates to a V-shaped empennage control surface course control extension control method which comprises the steps that a left control surface deflection angle reaches an upper limit, a right control surface deflection angle continues to deflect leftwards, and a right empennage generates right lower lift increment perpendicular to the incoming flow direction; the right empennage can simultaneously generate a vertically downward force and a head-up torque relative to the gravity center of the whole aircraft; a downward head lowering moment is generated through the longitudinal periodic pitch change of the rotor wings and the tilt angle of the rotor wings, so that the pitching moment is balanced; the vertical force balance of the whole aircraft is achieved by adjusting the attack angle of the aircraft body.

A downhole mud motor includes a driveshaft rotatably disposed in a driveshaft housing, a bearing mandrel coupled to the driveshaft, wherein the bend adjustment assembly includes a first configuration that provides a first deflection angle between the driveshaft housing and the bearing mandrel, wherein the bend adjustment assembly includes a second configuration that provides a second deflection angle between the driveshaft housing and the bearing mandrel, and a locking assembly including a locked configuration configured to lock the bend adjustment assembly into one of the first configuration and the second configuration until the downhole mud motor has at least one of reached a predefined depth in the wellbore, and a mud weight has reached a predefined mud weight threshold at a given depth, in response to which the locking assembly is configured to actuate from the locked configuration to an unlocked configuration.

The present application discloses a foldable display apparatus and a manufacturing method therefor, and an electronic device. The foldable display apparatus includes a screen and a supporting structure. The supporting structure includes two supporting assemblies. Each supporting assembly includes a first supporting part and a second supporting part spaced apart from each other. The supporting structure is designed according to at least one established empirical formula. Each of the at least one empirical formula includes at least one first feature parameter and a plurality of second feature parameters. The at least one first feature parameter includes a spacing between the first supporting part and the second supporting part in a flat state or a deflection angle of the second supporting part relative to the first supporting part in a bending state. The plurality of second feature parameters are determined according to form design requirements of the screen.

The invention provides a multi-physical field compensation method and system for an exposure machine, and the method comprises the following steps: constructing a dynamic error transfer model, and obtaining a coupling parameter based on the output of a coupling function; carrying out eigenvalue decomposition on the coupling parameters, screening principal component vectors to obtain a mapping matrix, modulating the mapping matrix through a thermal weight matrix to obtain a modulation matrix, and carrying out space-time weight reconstruction based on the modulation matrix to obtain a four-dimensional compensation parameter matrix; the control parameters of the air supply pressure of the air floating guide rail, the deflection angle of the DMD micromirror and the power of the laser are adjusted. A dynamic error transfer model containing mechanical-thermal-optical coupling characteristics is constructed, a vibration spectrum, temperature field distribution and light intensity energy data are fused in real time, compensation parameters are subjected to space-time weight reconstruction to obtain a four-dimensional compensation parameter matrix, the real-time performance of matching correction is improved, and therefore the parameter compensation effect and the machining precision are improved.

The invention discloses a multi-direction adjusting mechanical clamping jaw which comprises a mechanical clamping jaw body and an adjusting base, and an adjusting mechanism used for adjusting the space posture of the mechanical clamping jaw body is arranged between the adjusting base and the mechanical clamping jaw body. The adjusting mechanism comprises a spherical hinge unit providing a universal rotation foundation and an adjusting unit used for accurately controlling the deflection angle, the spherical hinge unit comprises a ball seat fixedly installed in an adjusting base, the inner wall of the ball seat is connected with a hinge ball in a rolling mode, and a first connecting rod is fixedly installed on one side of the hinge ball; the mechanical clamping jaw belongs to the technical field of mechanical automation equipment, and achieves the technical effects that multi-degree-of-freedom angle adjustment of the mechanical clamping jaw in the space is achieved through the synergistic effect of the spherical hinge unit and the cross arc-shaped frame adjusting unit, and the adaptability of the clamping jaw to complex grabbing scenes is greatly improved.