815 results about "Auto regulation" patented technology

The invention discloses an automatic aligning and hinging device and method for a whole-section steel truss girder. The device comprises a main cable transverse opposite-pulling system, a monitoring system, a hoisting system, a local aligning auxiliary tool, an adjusting control system, a temporary hinging device and a fine adjusting device. The monitoring system collects data such as spatial positions and attitude angles of the steel truss girder sections in real time and feeds back information to the adjusting control system; the adjusting control system generates a control instruction based on the information, coordinates the hoisting system to adjust the overall posture and position of the steel truss girder, controls the temporary hinge device to realize flexible connection of the upper chord, and controls the fine adjustment device at the lower chord interface to automatically adjust the longitudinal position and the vertical elevation to ensure accurate closure; the local alignment auxiliary tool is used for solving the problem of difficulty in butt joint of individual rod pieces; the main cable transverse opposite-pulling system dynamically adjusts transverse deviation of the main cable, the stable structure in the hoisting process is guaranteed, all the systems work cooperatively, and efficient, safe and full-automatic alignment and hinging of the whole section of steel truss girder are achieved.

The invention relates to the technical field of flotation machinery, and particularly discloses a high-precision automatic liquid level control system which comprises an intelligent controller, a PID controller, a laser distance measuring sensor, a floating ball and an intelligent valve positioner, the floating ball floats on the upper surface of liquid in a flotation tank, and the upper end of the floating ball is connected with a position feedback plate; the laser distance measuring sensor is used for measuring the position of the position feedback plate to obtain an actual liquid level and transmitting the actual liquid level data to the PID controller; the PID controller is used for carrying out PID operation on the actual liquid level and the set liquid level and outputting a signal to the intelligent valve positioner, and the intelligent valve positioner is used for controlling the air cylinder to move and opening or closing the valve through the linkage mechanism and feeding back execution parameters to the intelligent controller, so that the liquid level is automatically adjusted on line.

The invention belongs to the technical field of emergency water treatment, and particularly relates to an oily sewage treatment system based on intelligent regulation and control and an operation method. The system comprises an intelligent regulation and control server, a preprocessing unit, a separation unit, an online detection unit and a regulation and control unit, the intelligent regulation and control server is internally provided with a pretreatment module, a separation module, an online detection module, a data analysis module and a real-time regulation and control module, and the separation module provides a T-shaped pipe and air floatation pipe technology and is used for separating floating oil and emulsified oil. The intelligent regulation and control server is connected with all the units, before operation, calculation formulas of floating oil separation efficiency and emulsified oil separation efficiency are input into the intelligent regulation and control server in advance, and initial values of all parameters are set; during operation, data are transmitted in real time so as to calculate the floating oil separation efficiency and the emulsified oil separation efficiency, the data are stored, and parameters are adjusted in real time according to the optimal separation efficiency. According to different working conditions, automatic adjustment can be achieved, intelligent regulation and control are achieved, and the application range is wider.

The embodiment of the utility model provides a robot chassis and an autonomous mobile robot. According to the scheme, the two sides of the chassis body are each provided with one wheel set. The wheel set comprises a suspension swing arm, a rear auxiliary wheel and a rear universal wheel are arranged at the first end, in the length direction, of the suspension swing arm, and a driving wheel is arranged at the second end of the suspension swing arm. The rear auxiliary wheels and the rear universal wheels are arranged front and back. The suspension swing arm is similar to a lever, and the chassis can adapt to various grounds such as grounds made of different materials and uneven grounds (such as grooves, protruding obstacles and the like) due to the lever type suspension. In addition, the lever type suspension can automatically adjust the pressure of the driving wheels when the robot chassis crosses obstacles, so that the robot can better adapt to load changes. In addition, the two sides of the chassis body are each provided with a set of driving wheels, a set of rear auxiliary wheels and a set of rear universal wheels, and the bearing capacity and stability of the robot can be effectively improved.

The invention provides an automatic dosing adjustment method, device and system and a storage medium, and relates to the technical field of automatic control. The automatic dosing adjusting device comprises a flow measuring barrel, a processor, an automatic adjusting valve, a pneumatic pipe clamp valve and a liquid level sensor; the flow measuring barrel is connected in series to the downstream of the automatic regulating valve; the pneumatic pipe clamp valve is connected to the downstream of the flow measuring barrel in series. According to the structure, through an indirect metering mode of the flow measuring barrel and an unobstructed channel of the pneumatic pipe clamp valve, the problem of core blockage of a traditional dosing system in measurement and control points is integrally solved. The high-reliability hardware is integrated into a closed-loop automatic control system by a processor, and an automatic regulating valve can be instructed to perform precise regulation according to real-time and accurate flow data, so that stable and accurate automatic dosing is realized, and the system reliability and the medicament utilization efficiency are remarkably improved.

The utility model discloses a positioning mechanism of an automatic labeling machine, which belongs to the technical field of automatic labeling and comprises a labeling machine body, the outer side of the labeling machine body is movably connected with a support base, and the bottom of the inner side of the support base is movably connected with a transmission belt. A feeding positioning mechanism is movably connected to the inner side of the supporting base, and a positioning buffering mechanism is movably connected to the inner side of the feeding positioning mechanism, so that the limitation that a traditional labeling machine depends on a narrow conveying belt for limiting can be effectively solved; a lifting plate drives a positioning rod to reciprocate on the surface of the conveying belt to push materials to the center, the material volume is monitored in real time through a sensor, the stroke of a hydraulic cylinder is automatically adjusted, and self-adaptive positioning of the materials of different sizes is achieved; a fixing and limiting device does not need to be preset, the limitation of a narrow conveying belt on the material specification is avoided, meanwhile, the dependence of labeling operation on the initial position of the material is reduced through dynamic deviation correction, and the labeling precision is remarkably improved.

The utility model discloses a distillation instrument which comprises a rack, a heating bowl is mounted at the top of the rack, a flask is arranged at the top of the heating bowl, a receiving bottle is arranged at the bottom of the rack, a condensation pipe is communicated with the top of the receiving bottle, the top of the condensation pipe is communicated with the flask, a controller is arranged in the rack, and the controller is connected with the heating bowl. A distillate metering assembly is arranged on one side, close to the receiving bottle, of the rack. The distillation temperature and the weight of distillate are sensed in real time and compared with values such as the distillation temperature and the distillation speed which are input in advance, the heating power of the heating bowl is automatically adjusted, automatic adjustment and control over the distillation temperature and the distillation speed are achieved, the automation rate of the distillation instrument is increased, manual intervention is not needed in the distillation process, and the production efficiency is improved. The stability of the distillation temperature and the distillation speed in the distillation process is improved, so that the distillation efficiency and the sample purity are improved.

The invention provides a multiphase flow metering automatic control method and device, a medium and a program product, and is applied to an automatic control system of a multiphase flow metering device.The method comprises the steps that metering data from a mass flow meter, a gas flow meter and a liquid level meter are obtained, time synchronization processing and unification processing are conducted on the metering data, and a standardized data set is generated; based on the standardized data set, characteristic parameters representing the multiphase flow state are extracted, and a state parameter set used for describing the current flow state is generated; when at least one index in the state parameter set meets an abnormal judgment condition, an abnormal flow state is judged, and a corrected liquid level value is generated; and based on the deviation value between the corrected liquid level value and the reference liquid level, a feedback control signal is calculated, and the opening degree of the valve is dynamically adjusted, so that the liquid level of the fluid in the outlet pipeline is automatically maintained within the preset height range. According to the automatic adjusting mechanism, the liquid level in the outlet pipeline can be automatically adjusted within the preset height range, and stable output of the liquid phase is achieved.

The utility model discloses an automobile seat automatic adjusting sliding rail and an automobile seat thereof, and belongs to the technical field of automobile parts. Comprising a static sliding rail, and the static sliding rail comprises a static sliding rail fixing bottom plate, a static sliding rail front side wall and a static sliding rail rear side wall; a movable sliding rail front edge folding groove and a movable sliding rail rear edge folding groove are formed in the movable sliding rail, and the bottoms of the left end and the right end of the movable sliding rail are each provided with a pair of Z-direction gap eliminating idler wheels; the seat basin connecting plate is connected to the upper part of the movable sliding rail; the screw rod is arranged in the static slide rail cavity; the movable sliding rail automatic displacement driving mechanism is matched with the seat basin connecting plate, the movable sliding rail and the screw rod; the device is characterized in that front clearance eliminating mechanisms are arranged at the left end and the right end of the building wall corresponding to the front edge folding groove of the movable sliding rail respectively, and rear clearance eliminating mechanisms are arranged at the left end and the right end of the building wall corresponding to the rear edge folding groove of the movable sliding rail respectively; a pair of movable sliding rail guide mechanisms is arranged on the downward side of the middle of the movable sliding rail. The device has the advantages of simplifying the overall structure and facilitating manufacturing and assembling; the all-around excellent anti-backlash effect is embodied; the service life is long.

The invention relates to the technical field of automatic control, and provides an intelligent lifting control system and method for automatically adjusting the filling height, and the method comprises the steps that a multi-channel sensing module collects and fuses the current position, speed, bottle type size and energy consumption in real time, and generates multi-dimensional time sequence data; the high-order lifting strategy generation module predicts a synchronization error and a positioning deviation based on the multi-dimensional time sequence data and a dynamic deviation sensing model, and generates a high-order lifting strategy in combination with a productivity requirement; the motion trail planning module solves a target function constrained by motion acceleration and internal pressure of the model according to a high-order lifting strategy and the beer fluid model, generates a trail data point and converts the trail data point into a driving instruction; and the experiment driving optimization module analyzes a track execution effect based on an online disturbance test, continuously acquires data, judges a parameter correction direction, updates a beer fluid dynamic model and generates logic parameters according to a high-order lifting strategy. According to the invention, a multi-channel sensing technology is combined, so that high-precision, quick-response, stable and reliable filling height adjustment is realized.

The invention discloses a novel film laminating machine which comprises a film laminating machine body, an automatic adjusting compression roller mechanism, a waste recycling assembly, a temperature controller, a monitor, a speed monitor, a static electricity eliminator and a quality detector. The automatic adjusting compression roller mechanism is arranged on the film laminating machine main body and is used for monitoring and adjusting the pressure in real time; the temperature controller is arranged on the film laminating machine main body and is used for automatically adjusting the heating temperature according to a film laminating material and the type of a printed matter, so that the film laminating effect is optimized; the novel film laminating machine is reasonable in structural design, and the automatic adjusting compression roller mechanism, the temperature controller, the monitor, the speed detector and the static electricity eliminator are integrated at the corresponding film laminating positions; the structure is compact, automatic pressure adjustment can be achieved, and operation is stable and reliable.

The present disclosure provides a vehicle leak detection apparatus with automatic intake pressure regulation, comprising: an air pump; a first pipeline configured to allow air pumped by the air pump to be pumped into a test vehicle; a smoke generation unit arranged between the air pump and the test vehicle and configured to generate visible smoke in the air pumped into the test vehicle; and a check valve removably connected to the first pipeline and configured to release air after an air pressure in the first pipeline exceeds an intake pressure that the check valve can withstand so as to automatically regulate the intake pressure during vehicle leak detection.

The invention relates to the technical field of numerical control machine tool control, and provides an automatic precision adjustment control method and system for a numerical control machine tool, and the method comprises the steps: continuously judging the influence degree of a non-uniform mechanical wear error and a thermal deformation error on the current machining precision according to a non-uniform mechanical wear error feature and a thermal deformation error feature; according to the non-uniform mechanical wear error characteristics, calculating the mechanical wear compensation amount related to the motion axis position and the motion direction; according to the thermal deformation error characteristics, calculating a thermal deformation compensation amount related to the machining time length; according to the influence degree, the combination mode of the mechanical wear compensation amount and the thermal deformation compensation amount is adjusted, the mechanical wear compensation amount and the thermal deformation compensation amount are fused based on the combination mode, and a motion instruction compensation value is generated; and continuously superposing the motion instruction compensation value into an original motion instruction of the numerical control system so as to realize automatic precision adjustment and control. The method has the effect of improving the machining precision, stability and production efficiency of the numerical control machine tool.

The utility model relates to the technical field of brightness adjustment, and discloses a control circuit capable of automatically adjusting brightness gears, the control circuit is high in reliability and stable, the control circuit comprises an MCU control circuit (130) used for outputting PWM signals and enable signals, an LED drive circuit (141) and a current detection circuit (142), the signal feedback end of the LED drive circuit (141) is connected with the output end of the current detection circuit (142), and the output end of the current detection circuit (142) is connected with the output end of the MCU control circuit (130). And the control module is used for receiving the level signal and controlling the working current of the LED module according to the level signal so as to adjust the brightness of the LED module.

The utility model discloses a sliding type base for electromechanical installation. The sliding type base comprises a sliding type base body, a first guide rail, an installation block, a supporting mechanism and an adjusting mechanism. The adjusting mechanism is arranged at the end, away from the sliding type base body, of the mounting block and comprises a driving part and an adjusting part, the adjusting part is hinged to the supporting mechanism and used for adjusting the height of the supporting mechanism, and the driving part is in threaded sleeving connection with the adjusting part and used for driving the adjusting part to move; the adjusting mechanism is arranged at the top of the base and drives the first driving motor, the first driving motor drives the first threaded rod to rotate, the first threaded rod drives the moving block to move, the moving block and the mounting blocks move, and the first rotating rod and the second rotating rod rotate through movement of the moving block; the height of the supporting frame can be automatically adjusted according to the installation requirement of the electromechanical equipment, and the flexibility is improved.

The invention provides a test system of a direct current charging pile. The test system comprises a programmable load; the I / O controller is connected with one end of the I / O controller after the plugs and the sockets of the different functional units of the direct current charging pile are butted; and the control system is used for outputting a control instruction to the I / O controller, so that the I / O controller outputs a driving signal to the functional units according to the control instruction to respectively perform on / off control. According to the invention, on-off of each function signal can be respectively controlled according to test case requirements, and automatic gun insertion and extraction, automatic card swiping authentication and automatic charging pile off-line and on-line in a charging pile system test process are realized. The system can automatically drive an emergency stop switch and an access control switch, automatically adjust the temperature change of a charging gun, automatically load and adjust the size of a load, and automatically achieve the power supply and outage of a charging pile, and does not need the manual intervention of a tester in the testing process, thereby solving the problem of poor consistency of manual operation, and improving the testing efficiency. And the test efficiency of aging test, repeatability test and the like can be greatly improved.

The invention relates to the technical field of commercial vehicles, in particular to a saddle capable of automatically adjusting a main suspension gap for an electric tractor. Through cooperation of the front-back displacement mechanism, the sliding rail, the sliding plate, the toothed plate, the VCU vehicle control unit, the CAN / Lin communication network unit and the main suspension distance sensor, the effect of automatically adjusting the main suspension gap is achieved, the main suspension distance sensor monitors gap data between main suspension bodies in real time, the gap data are transmitted to the VCU vehicle control unit through the CAN / Lin communication network unit, and the gap data are transmitted to the VCU vehicle control unit through the CAN / Lin communication network unit. The VCU vehicle control unit controls the double-shaft motor to start according to preset parameters and actual working conditions, the double-shaft motor drives the first gear to rotate, the first gear is meshed with the toothed plate to drive the sliding plate to move front and back along the sliding rail, then the saddle body is driven to move synchronously, automatic and accurate adjustment of the main suspension gap is achieved, and the requirement for matching of different transportation working conditions and main suspension is met; driving bumping vibration is reduced, the wind resistance coefficient is reduced, and the vehicle economical efficiency is improved.

The invention relates to a method for automatically adapting (1) the safety distance between a motor vehicle and a vehicle being followed. The adaptation method (1) is implemented by a control unit and comprises a verification step (11), based on data from at least one sensor of the motor vehicle, to detect whether at least one passenger of said motor vehicle is not complying with at least one carrying condition. If it is detected that at least one carrying condition is not being met by at least some of the passengers, the method comprises a safety step (12) for the motor vehicle. The safety step (12) includes an adjustment step (13) for the safety distance separating the vehicle being followed and the motor vehicle so as to allow less forceful braking of the motor vehicle compared to a situation in which the carrying conditions are met for all passengers. Figure to be published with the abstract: Fig. 3

The utility model discloses a device for controlling automatic lifting of a grinding head of a polishing and grinding machine, and belongs to the technical field of adjustment of the grinding head of the polishing and grinding machine. The problem that in the prior art, due to the fact that adjustment of a grinding head of a traditional polishing and grinding machine depends on manual operation, the efficiency and the automation degree are low is solved. A PLC (Programmable Logic Controller) is respectively connected with a grinding head driving motor and a lifting hydraulic cylinder of an automatic lifting device; the grinding head driving motor is connected with the lifting hydraulic cylinder of the automatic lifting device; the automatic lifting device further comprises a fixed rack, a grinding head base, a transmission wheel fixing device, a grinding wheel and a grinding wheel belt. The grinding head driving motor is respectively connected with the lifting hydraulic cylinder and a support of the grinding head seat, the grinding head driving motor is arranged above the fixed machine frame, a grinding wheel belt is arranged in the fixed machine frame, the fixed machine frame is provided with a grinding wheel, and the bottom of the grinding wheel is connected with a transmission wheel fixing device. The grinding head adjusting device can be applied to automatically adjusting the grinding head of the polishing and grinding machine and meets the requirement for automation.

The utility model relates to the technical field of rail transit, in particular to an automatic adjusting device for a bogie wheel set of a rail transit vehicle. According to the technical scheme, the device comprises a fixing frame and supporting plates movably installed at the two ends of the fixing frame, and an automatic adjusting assembly and an anti-collision assembly are arranged on the fixing frame; the automatic adjusting assembly comprises two supporting frames movably installed at the bottom of the supporting plate, a shaft sleeve is fixedly installed at the bottom of each supporting frame, a fixing wheel is rotationally installed on the outer side of each shaft sleeve, fixing plates are fixedly installed on the front side and the rear side of each fixing frame, and thrust springs are fixedly connected between each fixing plate and the two supporting plates. The movable frame, the supporting wheels, the movable rods, the connecting frame, the fixing piles and the anti-collision frame are matched with one another, so that the angle of the fixing wheels can be automatically adjusted along a curve of a rail, automatic adjustment of a vehicle bogie wheel set is facilitated, the anti-collision effect of the anti-collision frame can be improved, and the situation that the anti-collision frame is damaged when collided is avoided.

The invention discloses a vehicle window control method which comprises the following steps: identifying a collision type in response to received vehicle collision early warning information; calculating a collision force based on the collision type; calculating a predicted window frame deformation amount according to the collision force and attribute parameters of the vehicle window frame; determining a safe vehicle window opening degree based on the predicted window frame deformation amount; and the opening degree of the car window is adjusted to the safe car window opening degree. The collision risk is evaluated in real time, when the vehicle collision early warning information is received, the vehicle window is automatically adjusted to the safe opening degree, an escape channel is opened for passengers, the smooth rescue path is ensured, and therefore the survival probability of the passengers in an accident is remarkably increased.

The application relates to the technical field of general control or regulation systems, and discloses an automatic regulation method for a plug taking pump operation, which comprises the following steps: synchronously acquiring a voltage vector and a current vector of a controlled execution unit; calculating a transient active power by calculating a scalar product of the voltage vector and the current vector; removing a steady power consumption component in the transient active power to extract an energy recoil pulse; generating a micro-elastic recoil energy product representing load yield information by integration; monitoring a differential gradient of the micro-elastic recoil energy product; and determining an output negative gradient duty cycle signal at a collapse moment to regulate a power slope. The application uses a vector power analysis mechanism to capture a load fragmentation signal, eliminates hydraulic hysteresis of a control loop, ensures that a negative pressure release rate of a pipeline matches a load displacement increment, and improves regulation accuracy under a load impedance step working condition.

The utility model discloses an automatic adjusting device for the extension length of an ultra-fine oilstone, which comprises an oilstone and a mounting seat used for being mounted on external bearing processing equipment, the mounting seat is provided with an adjusting groove along the height direction, the oilstone slides in the adjusting groove, and the initial end of the oilstone penetrates out of an opening at the tail end of the adjusting groove. A pressing plate used for pressing the tail end of the oilstone is arranged in the adjusting groove in a sliding mode, and the installation base is provided with a driving piece used for being in linkage fit with external hydraulic driving equipment so as to apply loads to the oilstone through the pressing plate and a guiding piece used for being in linkage fit with the driving piece so as to guide the loading position and direction of the loads. The pressing plate is provided with a detection piece used for detecting the contact degree of the starting end of the oilstone and an external bearing ring channel and a positioning piece used for guiding and positioning the sliding direction of the oilstone. The oilstone solves the problem of poor contact between the oilstone and a product to be machined due to the fact that the extension length of the traditional oilstone is not adjusted in time or the oilstone is abraded excessively during machining.

The invention discloses an automatic distribution depressurization regulating valve which comprises a main body mechanism, a guide depressurization mechanism and a direct impact depressurization mechanism, the main body mechanism comprises a valve body, a valve rod is arranged in the valve body, a valve element is installed at one end of the bottom of the valve rod, an arc-shaped protrusion is arranged on the outer wall of the valve element, and a V-shaped groove is formed in the arc-shaped protrusion; during use, high-pressure water flow enters the valve body and impacts a second damping ring, so that the second damping ring compresses a second spring in a groove, a first damping ring and the second damping ring are matched for preliminary buffering and pressure reduction, other high-pressure water flow enters the valve element, the flow direction of the high-pressure water flow is changed through an arc-shaped protrusion, and the high-pressure water flow is guided into a water inlet cavity through a V-shaped groove to impact an arc-shaped plate; and the annular pressure sensor senses the pressure in real time, and automatic distribution and pressure reduction regulation and control can be achieved when high-pressure water flow enters the valve body through mutual cooperation of double automatic regulation and pressure reduction.

The utility model discloses an automatic adjustment type power overhead cable windproof fixer, which relates to the technical field of power transmission and comprises a mechanism column, a fixing mechanism is movably mounted on the lower side of the mechanism column, a fastening mechanism is movably sleeved on the inner side of the mechanism column, and a supporting mechanism is rotatably connected to the front side of the mechanism column close to the upper side of the mechanism column. The front side and the rear side of the mechanism column are fixedly connected with tensioning mechanisms, and the supporting mechanism comprises a first gear and a fixed pulley. According to the automatic adjusting type electric power overhead cable windproof fixing device, the first gear is rotated to enable the first traction rope to erect a cable, and the motor drives the tensioning wheel to move left and right, so that the tensioning degree on the first traction rope is controlled; by means of an automatic adjusting mode, the first pulling rope can fix the cable more stably, response is fast, operation is convenient and fast, and the situation that the cable fixing effect is affected by too large or too small tensioning degree is avoided.

The utility model relates to the field of production line conveying, and discloses an automatic assembly production line conveying device which comprises a supporting frame, a conveying belt support is fixedly installed in the supporting frame, the left end of the conveying belt support is rotationally connected with a driving wheel, and the right end of the conveying belt support is rotationally connected with a driven wheel. The outer surface of the driving wheel and the outer surface of the driven wheel are each sleeved with a conveying belt, the driving motor drives the small gear to rotate, due to meshing connection between the small gear and the rack, the rack enables the two special-shaped connecting rods to move in the direction away from or close to each other, and due to the movement, the distance between the two limiting plates can be conveniently adjusted through the supporting adjusting rod; according to the device, the limiting plates are arranged to adapt to parts of different sizes and prevent the parts from deviating greatly, the device can automatically adjust the distance between the limiting plates to achieve effective limiting of the parts, meanwhile, the ceramic layers are installed on one sides of the limiting plates, friction force between the limiting plates and the parts can be reduced, and normal conveying of the parts is guaranteed.

The utility model discloses an automatic flow adjusting and pressure stabilizing device for a submersible pump, and relates to the technical field of submersible pumps. The automatic flow adjusting and pressure stabilizing device for the submersible pump comprises the ground, the submersible pump and a control box. The supporting assembly comprises a fixing cylinder, two connecting rings are fixedly connected to the surface of the fixing cylinder, and fixing rods are fixedly connected to the opposite faces of the two connecting rings. The surface of the fixed rod is fixedly connected with a first fixed cylinder, the surface of the fixed rod is slidably connected with a movable cylinder, the surface of the movable cylinder is fixedly connected with a limiting ring, the surface of the fixed rod is sleeved with a reset spring, the surface of the movable cylinder is hinged to a connecting rod, the surface of the connecting rod is hinged to a connecting frame, and the surface of the connecting frame is rotatably connected with two rolling wheels. And through the arrangement of the connecting rod, the connecting frame and the rolling wheels, the outer side of the submersible pump can be conveniently supported and protected, the friction resistance is reduced, the risk of equipment damage caused by collision is reduced, and the operation safety is improved.

This invention relates to the field of prime mover calibration, specifically to a control method for a turbine-type hydraulic dynamometer, comprising the following steps: obtaining the optimal opening degree of the inlet valve for all speed segments through segmented speed trial adjustment; obtaining the specific operating condition speed value, speed adjustment range, and automatic adjustment closing value of the drain valve for each operating condition; performing weighted judgment based on the speed monitoring sequence; calculating the linear fitting degree as a correction coefficient, and obtaining the speed deviation and valve position correction amount. This invention matches a dedicated speed adjustment range and initial adjustment value of the drain valve for each preset operating condition, eliminating the need for blind trial and error in the gradient adjustment of the drain valve, enabling rapid adaptation to the operating condition switching requirements of the prime mover, shortening the convergence time of speed control, and improving the dynamometer's response speed to operating condition switching.