1076 results about "Constant speed" patented technology

The invention discloses a straight gear shape-free measurement method based on single-group line structured light. The method comprises the following steps: constructing an optical platform coordinate system, carrying out line structured light coordinate system calibration through a spherical calibration body, and calibrating the rotation center of a precision turntable; installing a measured straight gear, establishing a straight gear coordinate system, and adjusting the position of the linear structure optical measuring head, so that the measuring field of view of the linear structure optical measuring head covers a root circle to an addendum circle of the straight gear; the straight gear is installed on a precision rotary table, the straight gear is driven to rotate at a constant speed, a linear structure optical probe scans and collects straight gear contour point cloud data and circular grating angle information, and tooth surface three-dimensional point cloud data is obtained; based on the three-dimensional point cloud data of the tooth surface, extracting an addendum circle, a dedendum circle and an involute tooth profile, and calculating spur gear parameters; performing reverse three-dimensional shape modification tooth surface identification on the shape modification straight gear to generate a three-dimensional deviation diagram; and outputting a measurement result and printing a report. The problems of shape-free rapid measurement, modification tooth surface identification and tooth surface three-dimensional deviation characterization of the straight gear with unknown basic parameters are solved.

A friction stir spot welder includes: a pin; a shoulder; a rotary driver; a tool driver; and circuitry that performs an operation of driving the rotary driver and the tool driver such that the pin and the shoulder press a workpiece by a first pressing force while rotating at a first rotational frequency, and after the operation, performs an operation of driving the rotary driver and the tool driver such that a tip of the shoulder in a rotating state is pressed in to a first position. The first position is a position corresponding to 46% or more of a thickness of the workpiece from a front surface of the workpiece. A press-in speed of the shoulder until the shoulder reaches the first position is a constant speed.

The invention relates to the technical field of new energy vehicles, and particularly discloses a control method, system and device for steep slope slow descent of an electric vehicle and a storage medium, and the method comprises the steps that a vehicle control unit calculates the required torque value of the vehicle at the actual vehicle speed based on the current gear, the actual vehicle speed, the slope, the vehicle mass and the state of a power battery; sending a negative torque request to the motor based on the demand torque value; the state of the vehicle is monitored, when it is monitored that the current state of the vehicle meets the preset abrupt slope slow descent function condition, according to the met abrupt slope slow descent function condition, the motor torque and air brake synergistic effect are dynamically adjusted based on the negative torque request, and the cruise switch of the abrupt slope slow descent function is controlled; therefore, the vehicle can run at a constant speed under the downhill road condition. According to the scheme, the abrupt slope slow descent function of the vehicle is controlled, potential safety hazards when the vehicle is driven on a high-speed downhill road section are avoided, and the safety of the whole vehicle is effectively improved.

[Problem] To provide a video output system, a video output program, and a video output method which are capable of supporting determination of a referee in a match competition and improving the reliability of the determination result. [Solution] Video capturing devices 10 captures a competing scene of both players who compete in a stadium, and the captured videos are outputted to monitors 80 disposed at referees. The output videos are output such that a real-time video is output to a first referee at a constant speed, and a specific video edited by using a part of the real-time video is output to a second referee at a slower speed than the constant speed. On the basis of the specific video, the second referee can verify the determination made by the first referee, thereby improving the reliability of the determination result.

The invention relates to the technical field of laser cutting, and particularly discloses a laser cutting device based on H-shaped steel structure production. A laser cutting unit; a feeding unit; a correction unit; and a guide unit; the guiding unit conducts self-adaptive movement along the bending path of the H-shaped steel structure and guides the deviation rectifying unit to drive the laser cutting unit to conduct transverse compensation in real time, it is guaranteed that the height of the laser cutting path is consistent with the height of the extending path of the H-shaped steel structure all the time, and the laser cutting unit can achieve transverse deviation rectifying while longitudinal feeding is conducted; therefore, curvature changes in any direction can be flexibly responded, the system is particularly suitable for an H-shaped steel structure with irregular bending characteristics, in the process that the feeding unit drives the laser cutting unit to longitudinally feed at a constant speed, the system automatically completes path tracking and transverse compensation, and continuous high-precision cutting operation is achieved.

An isokinetic control module and method for incorporation on both new and existing exercise equipment. The control module replaces standard friction and hydraulic resistance components offering constant speed of the moveable elements of the machine rather than a selected resistance or weight. The constant user-generated resistance prevents injury and enhances strength training of the targeted muscle groups by maintaining constant strain on those muscles throughout the exercise. This method and device incorporates both a PCFC valve and a check valve device, removing all resistance the moment the user stops applying force to the machine. This enhances safety and facilitates the rapid return of the lifting element to its home position between repetitions. An optional graphical display is also disclosed.

The utility model discloses a rope winding machine, and aims to provide a rope processing mechanism of the rope winding machine, which can keep a rope tight in a rope pulling process, has a good winding effect and can prevent the rope from being knotted and broken at the same time, and is characterized in that the rope penetrates through a rope routing device and a rope pulling device and is fixedly wound in a rope winding device; meanwhile, the thread rope can be kept tight through the thread pulling device, so that the thread rope is kept to move at a constant speed in the machining process, the effect of wound finished products is improved, a knotting detection function and a thread breakage detection function are arranged in the thread routing device, the situation that the thread rope is knotted and broken in the thread routing process, and consequently the yield of the finished products is affected is prevented, and the production efficiency is improved. Furthermore, a meter counting wheel is arranged in the wiring device, so that the length of the processed thread rope can be clearly and intuitively detected, the man-machine interaction effect is good, and the automatic thread rope winding machine is suitable for the technical field of automatic thread rope winding machines.

The invention discloses a copper foil cutting and punching cooperative control method and equipment. The equipment comprises a continuous discharging device, a copper foil punching device, a cutting and pulling device and a cooperative control system. The continuous discharging device feeds materials at a constant speed, and a material storage assembly is arranged between discharging and punching to form a buffering section. The copper foil punching device is used for carrying out intermittent punching on the copper foil; the cutting and pulling device comprises a feeding assembly, a cutting assembly, a pneumatic pressing assembly and a pulling assembly and is used for conveying, clamping and cutting the copper foil, the pneumatic pressing assembly can push the remaining copper foil to a clamping position after cutting, and the copper foil is prevented from falling off; the cooperative control system is combined with a sensor detection signal to dynamically adjust the action rhythm of discharging, punching and cutting, and coordination and synchronization of multiple procedures are achieved.

The invention relates to an auxiliary braking constant-speed downhill control method and device, electronic equipment and a storage medium, and belongs to the technical field of vehicle braking. The method comprises the steps that when a vehicle starts an auxiliary braking function, running parameters of the vehicle are obtained, and the total braking force of the vehicle is determined based on the running parameters; the operation parameters comprise load, vehicle speed and gradient; determining a braking mode of the vehicle based on the engine braking force and the total braking force of the vehicle; the braking mode is engine braking, or the braking mode is engine braking and service braking; and controlling the vehicle to go downhill at constant speed based on the braking mode. According to the auxiliary braking constant-speed downhill control method, when the auxiliary braking function of the vehicle is started, the load, the vehicle speed and the gradient of the vehicle are obtained, the total braking force is calculated, traveling braking is supplemented when engine braking is insufficient, and it is guaranteed that the vehicle keeps the constant speed to go downhill by combining engine braking and traveling braking; the braking device can flexibly adapt to different road conditions, improves the braking effect and the driving safety, and is low in cost.

The invention discloses a cylindrical object spiral printing positioning method, device and equipment and a storage medium, and relates to the technical field of ink-jet printing. According to the method, when a cylindrical object is arranged on a printing station, a preset acceleration angle is formed between the X-axis white edge position of the cylindrical object and the projection position of a spray head on the cylindrical object, and the Y-axis movement initial position is determined according to the X-axis acceleration time and the Y-axis acceleration distance; setting the starting position of the stepping motion of the cylindrical object at the starting position of the Y-axis motion, controlling the cylindrical object to rotate at an accelerated speed in the rotation direction and move at an accelerated speed in the stepping direction at the same time, and when the X-axis white edge position reaches the projection position, starting to rotate at a constant speed and stepping at a constant speed, controlling the spray head to perform ink-jet printing, synchronous and accurate positioning of the X-axis white edge position and the Y-axis white edge position is achieved, the accuracy of the image printing position in spiral printing of the cylindrical object is improved, and therefore the image printing quality is improved.

The invention relates to the technical field of welding devices, in particular to a welding device for metal steel structure machining, which comprises a machine base, a distance control motor is fixedly mounted on the surface of the machine base, a distance control threaded rod, a clamping seat, a conveying seat, a lifting threaded rod and a conveying roller are arranged, and the distance control threaded rod is matched with the clamping seat by utilizing the synergistic effect of the structures; the distance between the clamping blocks is adjusted through driving of the motor to adapt to workpieces of different lengths and is stably fixed through the clamping mechanism, the lifting threaded rod on the conveying base can drive the conveying roller and the pressing roller to move up and down, and the distance is flexibly adjusted to meet the conveying requirements of the workpieces of different thicknesses. The conveying roller is driven by the motor to be matched with the material pressing roller to form stable conveying, it is ensured that workpieces move linearly at a constant speed, positioning clamping and conveying distance adjustment of the workpieces are changed into stable conveying, the adaptability of the device to diversified workpieces is improved, the accuracy of the welding position is guaranteed, and the welding efficiency and quality are improved.

The invention relates to the technical field of motor control, and discloses a chip mounter Z-axis linear motor module end-process force control method, a driver, a medium and a method, and the method comprises the following steps: S1, after a preset end-process position is reached, motor control is switched from position loop control to speed loop control, so that a motor keeps uniform motion; s2, monitoring whether a real-time current value fed back by the motor reaches a threshold current Iset1 or not and maintaining the real-time current value for a preset time length; s3, if the real-time current value reaches Iset1 and is maintained for a preset time length, continuously monitoring whether the real-time current value reaches a threshold current Iset2 and is maintained for a preset time length; and S4, if the real-time current value reaches Iset2 and is maintained for a preset time length, judging that collision occurs. According to the scheme, the speed ring is adopted to control the motor to move at a constant speed to carry out precise force control, meanwhile, the dynamic current threshold value is set to carry out two times of collision detection, collision detection is achieved while force control is carried out, a sensor does not need to be additionally used, and the requirements for mounting precision and compact structure are met.

The invention relates to the technical field of image processing, in particular to a glass bead defect detection method and system based on visual detection. According to the method, glass beads are separated one by one to a detection track and controlled to roll at a constant speed, image sequences containing multiple rotation angles are continuously collected in the rolling process, then whether movement stability, dispersion and brightness meet corresponding standards or not is determined, and when any detection result does not meet the standards, a sorting mechanism immediately removes defective products at the discharging end. According to the method, the glass beads with defects can be accurately and quickly identified and removed.

The invention belongs to the technical field of lifting operation platforms, and particularly relates to a pushing chain type lifting operation platform which comprises a pushing chain lifting mast, the pushing chain lifting mast comprises a telescopic mast and a pushing chain driving system, and an operation platform is installed at the top end of the telescopic mast. According to the pushing chain type lifting operation platform, a variable frequency motor drives a pushing chain to conduct high-speed and constant lifting motion, a mast is vertically pushed and driven to ascend and descend, so that the operation platform on the top of the mast is driven to ascend and descend, the operation platform can stop at any height without sliding down, pure mechanical driving is adopted, and the risk of hydraulic oil leakage is avoided; and meanwhile, the problems that the transmission efficiency is low, the lifting speed is low, the speed is not constant, the descending speed is difficult to control, the stopping precision is low, and oil leakage possibly pollutes the environment are solved.

The utility model belongs to the technical field of gear ring machining, and particularly relates to gear ring polishing and deburring equipment which comprises a rack serving as a connecting base frame, a supporting component connected to the rack and a motor installed at the bottom of the rack, the output end of the motor is connected with the input end of a transmission, and the transmission is connected to the outer side of the rack. The output end of the transmission is connected with the rotating seat, the rotating seat is rotationally connected to the top of the rack, the clamping seat is arranged at the top of the rotating seat, the angle grinding component is connected to the rack and grinds a gear ring arranged on the clamping seat, the motor drives the rotating seat to rotate from the top of the rack, the gear ring arranged on the clamping seat rotates at a constant speed, and the grinding efficiency is improved while subsequent uniform grinding is facilitated. The first air cylinder drives the angle grinder connected to the outer side of the first movable plate to horizontally move along the outer side of the support, then the height of the angle grinder is changed, the position of an angle grinding piece is conveniently adjusted, and follow-up angle grinding operation is facilitated.

The invention relates to the field of vehicle control, in particular to a vehicle downhill constant-speed control method and system based on a hydraulic retarder and a storage medium. According to the ramp information and the state information of the vehicle, fitting wind resistance and road resistance coefficients of the vehicle based on a least square method; according to the wind resistance and road resistance coefficient and ramp information of the vehicle, first target brake pressure of a hydraulic retarder controller and second target brake pressure of a hydraulic retarder are calculated; calculating a proportional valve control input value, wherein the hydraulic retarder controls the vehicle speed based on the proportional valve control input value; the first target brake pressure and the second target brake pressure of the hydrodynamic retarder are calculated by fitting the wind resistance coefficient of the vehicle and the road resistance coefficient, the pressure of the working cavity is adjusted through the input value of the pressure closed-loop control proportional valve, and the precision and stability of vehicle downhill constant-speed control are remarkably improved; and it is ensured that the vehicle can still rapidly and stably maintain the target vehicle speed when the gradient changes, and the driving safety and comfort are greatly optimized.

The invention discloses a method for achieving starting and dynamic power output of a range extending system. The method comprises the following steps that 1, a BMS feeds back an electromagnetic SOC to a VCU in real time; 2) judging by the VCU; (3) a shutdown instruction is sent to the ECU; 4) the ECU controls the engine to stop and sends a stop instruction to the GCU; (5) the GCU controls the generator to stop; (6) a starting instruction is sent to the ECU; (7) the ECU sends a starting instruction to the GCU; (8) the GCU drags the engine at a constant speed; (9) the ECU judges whether an ignition instruction is sent or not according to the rotating speed, the oil temperature and the water temperature; (10) the GCU stops dragging; (11) the ECU controls the engine to enter an idle speed; and (12) the ECU sends a preparation completion instruction to the VCU, the situation that energy consumption is increased due to the fact that a traditional range extending system repeatedly switches on and off and frequently adjusts rotating speed gears in the battery charging process is optimized, when the working condition is stable, the battery is kept at a proper capacity, the stability of the battery is improved, and the service life of the battery is prolonged.

The invention discloses a jacket pressure-bearing equipment corrosion defect in-service detection device and detection method, the jacket pressure-bearing equipment corrosion defect in-service detection device comprises a transverse frame, first arc frames are fixedly mounted on two sides of the transverse frame, the middle ends of the first arc frames are movably connected with contact wheels through bearings, and the lower ends of the back surfaces of the first arc frames are movably connected with second arc frames through hinges. The first arc-shaped frame and the second arc-shaped frame form a hoop structure capable of being opened and closed, the positions of the supporting wheels are adjusted in cooperation with a second screw and a movable frame, jacket pressure-bearing equipment with different pipe diameters can be rapidly adapted, overall rapid installation and fixation are achieved, a servo motor is controlled through a PLC to drive a ball screw, and the clamping device is convenient to use. The detection probe is driven to move at a constant speed along the surface of equipment, so that the problem of detection signal fluctuation caused by non-uniform moving speed in traditional manual operation is avoided, the stability and reliability of detection data are ensured, and the defect detection precision is remarkably improved.

The invention relates to the technical field of elevator fault diagnosis, in particular to an elevator fault diagnosis and positioning method based on big data, which comprises the following steps: acquiring speed and load data of an elevator and vibration acceleration in vertical and horizontal directions; each elevator operation stage is divided into a starting stage, a constant speed stage and a braking stage, and amplitude change coefficients and amplitude frequency coefficients of the starting stage and the braking stage during each elevator operation are obtained, so that vibration abnormal coefficients of the starting stage and the braking stage during each elevator operation are obtained; the method comprises the following steps: calculating a vibration consistency coefficient influenced by unbalance of a traction sheave of the elevator when the elevator runs each time so as to obtain a vertical vibration abnormal value when the elevator runs each time, calculating an inherent frequency approximation coefficient of vibration acceleration in the horizontal direction when the elevator runs each time so as to obtain an elevator fault significant value in each monitoring time period, and diagnosing an elevator fault condition. And fault positioning is carried out in combination with the classification model. The accuracy of elevator fault diagnosis and positioning can be improved.

To provide a game machine capable of making a player enjoy a game.SOLUTION: A game machine includes a plurality of reels and a plurality of stepping motors for rotating the corresponding reels. Each reel is so constituted that a belt-like reel tape is attached to an outer peripheral surface of a reel frame. If, in half or less of support parts out of a plurality of support parts in the reel frame, support pillars constituting the support parts are separated into an upper piece and a lower piece and are damaged to the extent that the pieces do not contact with each other when the reels rotate, when the reels rotate at a prescribed constant speed, an abnormality related to the rotation of the reels is not detected. On the other hand, when a depression operation is performed on a stop button during the rotation at the constant speed, half or more reels stop at a position deviated from a design value at least by one step or more.SELECTED DRAWING: Figure 193

A medium conveying apparatus includes a loading tray to place media, a feed roller to separate and sequentially feed the media placed on the loading tray, a motor to drive the feed roller, a sensor located on a downstream side of the feed roller in a medium conveying direction to detect a medium, and a processor to control the motor. In a separation period from a start of medium feeding by the feed roller to detection of a front edge of the first medium by the sensor, when feeding a first medium of a plurality of media placed on the loading tray, the processor controls the motor to rotate the feed roller at a constant speed, and when feeding a second or subsequent medium, the processor controls the motor to rotate the feed roller at a first speed and then at a second speed higher than the first speed.

The invention discloses a dual-mode touch sensor capable of realizing quantitative detection of elastic modulus and a method. A dual-mode sensing device of the dual-mode touch sensor detects a pressure strain electric signal when the surface of a detected object generates force deformation, and a data acquisition and processing device acquires the electric signal and performs data processing according to a specific elastic modulus detection model, so that quantitative detection of the elastic modulus of the material is realized. The method comprises the steps that a measured object is placed on a platform, and the axis of a sensor is kept perpendicular to a measured surface; positive pressure is loaded at the top of the probe at a constant speed to push the spherical probe to be pressed into the to-be-measured object at a constant speed; a voltage signal is collected through the data collecting and processing device, and the model measures the Poisson's ratio and detects the elastic modulus. According to the dual-mode touch sensor and the method, the Poisson's ratio of the material is accurately measured, the elastic modulus is quantified, a robot can recognize the mechanical performance of an unknown material, and finer perception and interaction are achieved.

The present application relates to the technical field of automobile bolt plating, in particular to a hot galvanizing device for automobile bolts, which comprises a processing table, a galvanizing cylinder, a control case, a driving assembly, a lifting assembly and a hanging plate, etc., one side of the processing table is provided with a side plate, the arc-shaped groove on the side plate cooperates with the moving assembly driven by the first motor, so that the base is automatically at the lowest point in the loading and unloading stations, the galvanizing station is precisely aligned with the galvanizing cylinder, the bolts are independently hung through the annular frame, the hanging plate adopts a detachable clamping structure, the second motor drives the bolts to rotate at a constant speed, cooperates with the arc-shaped protrusions at the bottom of the galvanizing cylinder to make the bolts reciprocate and jump, and the lifting assembly controls the immersion depth of the bolts, the device solves the problems of bolt occlusion, collision and uneven plating in the traditional frame soaking process, and through the independent hanging, stable rotation and jumping design, the surface precision of the bolts and the uniformity of the plating layer are ensured.

The invention discloses a compatible system for an MT test bench to adapt to an AT transmission and a test method, and belongs to the technical field of transmission test. The system comprises a driving motor base translation mechanism, a driving motor, a simulation crankshaft, a 6-to-8 adapter flange, a tested AT transmission, an oil pressure collection box, an engine oil external circulation device and the like. Mechanical adaptation is achieved through a 6-to-8 adapter flange and an I-shaped telescopic transmission shaft, a gear box can be switched between a constant speed mode and a speed reduction mode to adapt to different gears, a motor base translation mechanism is driven to adjust the coaxiality, and the oil temperature is controlled to be 105 + / -5 DEG C through an engine oil outer circulation device; the test method comprises the steps of preprocessing, assembly connection, initialization setting, test operation, monitoring recording and resetting, tests comprise a running-in test and a fixed gear durability test, oil pressure data are transmitted in two paths, and automatic shutdown is carried out when abnormity occurs. By transforming the idle MT rack, AT transmission test compatibility is achieved, and the advantages of improving the resource utilization rate, reducing the cost, enhancing the test adaptability and reliability and the like are remarkable.

The invention discloses an anchor rod or anchor cable mounting device and method for inhibiting failure of an anchoring interface, and relates to the technical field of roadway supporting. The device comprises an annular body, a conical protrusion structure, a pulse press-in device, a fluid flushing system and a guide stabilizer, and is suitable for various hole diameters and different surrounding rock types. The construction method using the device comprises the following steps: drilling a hole by a drilling machine to mount an anchor rod or an anchor cable, evaluating the drilling hole, determining a test environment and boundary conditions, performing a drilling hole compression test to simulate confining pressure to obtain a stress deformation response curve, and determining the bonding performance and the shear strength through a pull-out test. The size of the conical protrusion is determined by combining lithology and crustal stress characteristics, the device is installed to a drilling target section, the pulse pressing-in device is started, the conical protrusion structure is pressed into the hole wall of a drilling hole to form a continuous groove, and when a fluid washing system is started to remove dust and chippings, a guiding stabilizer is connected, so that the drilling target section is formed. It is ensured that the device retreats from a drill hole at a constant speed, cleaning operation in the hole is completed, and finally the prefabricated anchor rod is inserted to form a high-adhesion and high-shear-resistance complete anchoring structure.

The invention relates to the technical field of welding equipment, and discloses movable multi-oil-nozzle welding equipment which comprises a lathe bed, a spindle box assembly, a tailstock mechanism, a material supporting base, a stand column, a wire feeder assembly, a vertical sliding rail and a welding gun positioning system. By means of head-tail cooperative clamping and multi-axis linkage design, high-coaxiality clamping of workpieces and accurate positioning of a welding gun are achieved; the V-shaped bracket automatically avoids, the wire feeder supplies wires at a constant speed, the welding gun can be finely adjusted in real time, and continuous and automatic girth welding of the multi-oil-nozzle workpiece is completed. According to the method, the welding efficiency and quality can be remarkably improved, the method adapts to various workpiece shapes, manual intervention is reduced, and high universality and expansibility are achieved.

The invention belongs to the technical field of new energy automobile transmission gear shifting control, and discloses an AMT gear shifting control method in an electric truck combined braking constant-speed downhill process, which comprises the following steps: judging whether a vehicle enters a combined constant-speed control state or not, and if the vehicle enters the combined constant-speed control state, selecting an AMT gear shifting rule based on a preset AMT gear shifting rule; the AMT optimal gear is obtained according to the current vehicle speed and the required regenerative braking torque, the limitation that only the motor efficiency is considered in a traditional method is broken through, the transmission system and the battery charging and discharging efficiency are synchronously covered, meanwhile, a braking torque cooperative change mechanism is creatively adopted, and the optimal gear is obtained. In the gear shifting process, braking force distribution of the motor and the hydraulic retarder is coordinated according to the preset AMT gear shifting rule, vehicle speed fluctuation caused by power interruption is eliminated, the energy loss and speed control instability risks caused by frequent gear shifting are overcome, driving comfort is guaranteed through gear shifting hysteresis control and the minimum vehicle speed threshold value, and safe and energy-saving closed-loop control is formed.

The invention discloses a winding and sleeving method of a liquid hydrogen storage tank, which comprises the following steps of: fixing an inner container on a rotatable winding tool, rotating at a constant speed, winding a plurality of layers of heat insulation materials layer by layer, and synchronously sewing. Hoisting the inner container after winding, and mounting movable wheels on a bearing support at the bottom of the inner container; a guide rail is laid in the shell, and the inner container is horizontally hoisted to the starting end of the guide rail. The movable wheels slide along the guide rails, the inner container is horizontally moved into the shell, and hoisting points are alternately switched in the process so that the movable wheels can be disassembled in a segmented mode. The bearing support is used for supporting the inner container, and the concentricity of the inner container and the shell is adjusted; after the inner container is fixed, two ends of the shell are sealed and air tightness detection is performed. Introducing dry nitrogen into the inner container to replace moisture and air; and after the replacement is completed, vacuumizing to a set vacuum degree to complete the assembly. According to the method, nondestructive winding and assembling of the multi-layer heat insulation material are achieved, the large-volume storage tank manufacturing problem is solved, weld joints and material exposure time are shortened, and the storage tank quality and production efficiency are improved.

The invention provides a device, method and system for testing the service life of a surgical cutting instrument, and the method comprises the steps: obtaining the parameter information of the surgical cutting instrument, and the parameter information at least comprises the type information of the surgical cutting instrument; according to the parameter information, each moving assembly is controlled to move according to a preset track corresponding to the parameter information, so that the surgical cutting instrument is driven to cut a to-be-cut sample; in the process that the surgical cutting instrument cuts the sample to be cut, a cutting signal of the surgical cutting instrument is obtained in real time, and whether the moving assemblies are controlled to stop moving or not is determined according to the cutting signal. The test device drives the operation cutting instrument to move, in the cutting, grinding and other processes, the operation cutting instrument moves at a constant speed, the test process is not affected by human factors, errors are small, and the accuracy of the test result can be ensured.

The invention provides a composite feedforward cooperative control method and system for propulsion of a controllable-pitch propeller of a ship. The method comprises the following steps: establishing a propulsion composite model comprising a ship load inquiry function model and a controllable-pitch propeller propulsion cooperative control model; identifying ship resistance characteristics in real time through a load inquiry model, predicting main engine power and propeller rotating speed requirements at different navigational speeds, and calculating a main engine power margin; setting a host security threshold based on the maximum persistent power margin; within the allowable range of the safety threshold value, three cooperative control modes are selected and executed in a self-adaptive mode according to the navigation working condition, wherein the three cooperative control modes include the pitch-accelerator joint control mode under the constant rotating speed of a main engine, the main engine rotating speed-accelerator joint control mode under the fixed pitch of a controllable-pitch propeller and the controllable-pitch propeller rotating speed-pitch joint control mode under the constant power of the main engine. According to the invention, through feedforward prediction and multivariable cooperation, navigational speed closed-loop stable control is realized, the problems of host overload, black smoke emission, high exhaust temperature and large control fluctuation are fundamentally avoided, and fuel economy and all-condition navigation safety are improved.