224 results about "Speed control system" patented technology

The invention provides a dynamic cooperative speed regulation control system and method for a machine tool spindle and a feed shaft, and the method comprises the steps: building a spindle energy transmission model and a feed shaft load-motion model, and constructing a strong correlation coupling relation between the two through cutting power; collecting main shaft power, torque and rotating speed and feed shaft cutting force, acceleration and displacement data in real time, and fusing to generate a combined state vector; calculating spindle margin and time correction based on spindle actual power and torque, and identifying working condition abrupt change according to the joint state vector; the feeding speed and the cutting depth are dynamically adjusted with the spindle margin sum as the constraint condition, and a cooperative adjustment strategy is generated; and converting the cooperative adjustment strategy into a feed shaft motion instruction and executing the feed shaft motion instruction. By constructing a real-time coupling closed loop of'spindle power-torque-rotating speed 'and'feed shaft speed-acceleration-position', the spindle is always locked to operate in a maximum power-torque envelope efficient area, the speed of the feed shaft is dynamically adjusted according to the spindle margin, locked rotor is completely eradicated, and no-load is eliminated.

The invention relates to the technical field of boiler induced draft fans, and discloses a boiler induced draft fan speed regulation system based on self-adaptive control, which is characterized in that a data acquisition module acquires outlet flue gas flow velocity data and flue gas oxygen content data of a boiler furnace at different sampling moments; the flow velocity analysis module performs time segmentation on the sampling time to obtain a plurality of time intervals, and determines a hearth outlet flue gas flow velocity fluctuation factor according to outlet flue gas flow velocity data; the combustion analysis module determines instantaneous flue gas oxygen content data and calculates a hearth combustion deviation factor; and the speed adjusting module performs weighted summation on the hearth outlet flue gas flow velocity fluctuation factor and the hearth combustion deviation factor to obtain a hearth comprehensive influence coefficient, performs speed regulation on the boiler induced draft fan according to the hearth comprehensive influence coefficient, and realizes multi-source monitoring analysis of the boiler hearth based on time sequence change and data change. Therefore, the dynamic and accurate speed regulation of the induced draft fan is ensured, the combustion efficiency of the boiler is improved, the energy consumption is reduced, and the stability and reliability of system operation are enhanced.

The invention discloses an electromagnetic pulse coupling signal separation method based on optimized variational mode decomposition, and belongs to the field of signal processing. The method comprises the following steps: carrying out injection test on an engine rotating speed control system shielding wire harness, and constructing an electromagnetic pulse coupling signal data set; a population initialization process of a parrot algorithm is improved by adopting spatial pyramid matching chaotic mapping, population diversity is improved by utilizing uniform ergodicity and initial value sensitivity of a chaotic sequence, and premature convergence is avoided; a mirror reflection learning strategy is introduced to improve the optimization precision and convergence speed of the parrot algorithm; optimization is carried out by using input parameters of improved parrot optimization variational mode decomposition, and mode decomposition is carried out on electromagnetic pulse coupling signals of a rotating speed control system; and calculating a kurtosis factor of each intrinsic mode function, and selecting a reconstruction target signal of the intrinsic mode function with the minimum kurtosis factor. According to the method, efficient and accurate electromagnetic pulse coupling signal separation can be realized, and the stability and reliability of the system in a strong electromagnetic interference environment are improved.

The invention relates to a conveyor speed regulation system. The material conveying machine speed regulating system comprises a detection unit, a controller and a driver. The detection unit is configured to detect operation state parameters of the mining machine or material load information of the material conveying machine in real time. The controller is configured to receive the operation state parameters of the mining machine or the material load information of the material conveying machine from the detection unit and generate a speed control signal based on the operation state parameters or the material load information. The driver is configured to receive the speed control signal from the controller and adjust power output by the driver to the material conveying machine in response to the speed control signal so as to adjust the running speed of the material conveying machine.

The invention relates to a hydrostatic driving speed regulation system, method, equipment and medium for a harvester, and relates to the technical field of mechanical driving speed regulation, the system comprises a closed hydraulic loop composed of a walking pump and a variable displacement motor, the walking pump is driven by an engine, and a two-position four-way proportional reversing valve group is arranged on the hydraulic loop; a rotating speed sensor is mounted on the variable displacement motor; the controller is used for acquiring real-time state information of the harvester and determining a speed regulation control strategy based on the real-time state information, and the speed regulation control strategy is a first control strategy or a second control strategy; and the speed regulation control strategy is sent to a two-position four-way proportional reversing valve set, so that the two-position four-way proportional reversing valve set adjusts the displacement of the walking pump and the displacement of the variable displacement motor according to the speed regulation control strategy. The technical effects that the speed regulation control strategy is accurately determined according to the real-time state information of the harvester, the displacement of the walking pump and the displacement of the variable displacement motor are reasonably adjusted, and the driving speed regulation requirements of the harvester under different working conditions are met are achieved.

The invention relates to a hydraulic station pressure closed-loop energy-saving control system and method.The hydraulic station pressure closed-loop energy-saving control system comprises a PID adjusting controller, a servo motor and a hydraulic pump, a control signal is input into the PID adjusting controller, the PID adjusting controller adjusts the servo motor according to feedback of speed and pressure signals, the adjusted signal is input into the servo motor, and the servo motor is controlled by the PID adjusting controller. The servo motor acts according to the adjusting signal and drives the hydraulic pump to output pressure. A constant-frequency asynchronous motor used at present is replaced by the servo motor, a servo driving system, a pressure feedback sensor and other assemblies are additionally arranged in a matched mode to form a servo variable-speed control system, pressure and flow form double-closed-loop control, on-demand energy supply of the hydraulic pump is achieved, power matching is optimized, and electric energy waste during low-flow work of the hydraulic station is reduced. According to the electro-hydraulic servo control system, pressure and speed double-closed-loop control is adopted, accurate energy supply according to needs is really achieved, shutdown operation can be achieved in the long-time pressure maintaining or intermittent stage, and therefore optimal energy supply is achieved.

This invention discloses a feeding speed control system and method based on the material level of a metering tube, applied to a yarn-making line. The yarn-making line includes a metering tube, an electronic scale, and multiple belts. Material flows sequentially from the first belt, the second belt, the third belt, and the metering tube to the weighing device. The feeding speed control system includes a control module and multiple photoelectric detection modules. The metering tube is divided into multiple material zones for characterizing the amount of material inside. The multiple photoelectric detection modules are all located inside the metering tube, and the number of photoelectric detection modules is the same as the number of material zones. Each photoelectric detection module is set to correspond to each material zone and is used to detect the material in the corresponding material zone. The control module is electrically connected to the multiple photoelectric detection modules and is used to control the feeding speed of the first belt, the second belt, and the third belt respectively according to the material information detected by the multiple photoelectric detection modules. This allows for real-time adjustment of the feeding speed of each belt, ensuring that the material flow rate in subsequent processes is quantitatively controllable.

The invention discloses a high-speed motor full-speed-domain high-precision speed measurement method based on a gear encoder, and belongs to the technical field of high-speed motor control. The method comprises the steps that a gear encoder is coaxially installed at the shaft end of a motor, integer position pulses are obtained through an enhanced orthogonal encoding pulse module, decimal position pulses are obtained through an enhanced capturing module, and rotor mechanical position pulses are calculated by combining the integer position pulses and the decimal position pulses. And calculating a single-interrupt period position pulse increment through a main interrupt program, performing multi-period accumulation, and calculating the rotating speed of the motor in real time based on an accumulation result. According to the method, through a continuous interruption accumulation algorithm, integer and decimal position pulse information is fully utilized, truncation errors and random errors in a traditional pulse measurement method and a time measurement method are effectively reduced, high-precision and fast-response speed measurement of the high-speed motor in the full-speed domain range is achieved, and the method is suitable for a high-speed control system with the speed of more than 60000 revolutions per minute and has a wide application prospect. The system has the advantages of simple structure, strong anti-interference capability and low software and hardware overhead.

The invention discloses a double-closed-loop fuzzy PID control method for a variable-frequency speed regulation system of a coal mining machine. The method comprises the following steps: inputting an initial target rotating speed; generating a dynamic target rotating speed adaptive to the current working condition; the fuzzy PID controller adaptively adjusts PID parameters according to the speed error between the actual output speed of the motor and the dynamic target rotating speed, and the speed error is accurately converted into expected torque current; the PI current controller outputs a PWM control signal to the coal mining machine variable frequency transmission mechanism based on a current error between the actual torque current and the expected torque current of the motor; and the coal mining machine variable frequency transmission mechanism adjusts output voltage and frequency according to the PWM signal and drives the traction motor to adjust the rotating speed, so that the actual torque current of the motor accurately tracks the expected torque current, and the actual output speed of the motor is consistent with the dynamic target rotating speed. Therefore, rapid, low-overshoot and anti-saturation efficient operation of the coal mining machine under complex disturbance is realized.

This application discloses a speed-up control system, control method, and controller for a steam-driven feedwater pump. The speed-up control system includes a PID controller, a start-up control valve, a load control valve, and a controller. The PID controller has an 8-second operating cycle and a dead zone of 15 revolutions. The controller controls the load control valve to be fully open and reduces the opening of the start-up control valve based on the output value of the PID controller, causing the pump speed of the steam-driven feedwater pump to increase from the turning gear speed to a first target speed. When the pump speed of the steam-driven feedwater pump reaches the first target speed, the start-up control valve is controlled to be closed. The opening of the load control valve is reduced, causing the pump speed of the steam-driven feedwater pump to increase from the first target speed to a second target speed. In this embodiment, by setting the operating cycle of the PID controller to 8 seconds, the number of output changes of the PID controller is reduced, thereby increasing the service life of the start-up control valve.

The present application relates to a kind of methods for controlling the speed of creeping vehicle, comprising the following steps: when vehicle enters first creeping state, the current state of multiple preset driving influence factors is obtained;According to the current state of each preset driving influence factor, according to multiple preset rules corresponding to multiple preset driving influence factors, multiple creeping target speed calculation values corresponding to multiple preset driving influence factors are calculated;The minimum value in multiple creeping target speed calculation values is used as the current creeping target speed of vehicle.The present application also proposes a kind of creeping speed control system.The present application also proposes a kind of vehicle.The creeping speed control method proposed by the present application can determine appropriate current creeping target speed according to the current state of multiple preset driving influence factors, and can reduce the risk of accident when vehicle creeps in some scenarios.The present application provides multiple creeping modes for users, which can improve user experience.

In one or more aspects of the present disclose a velocity control device of a transportation that comprises a memory, storing one or more computer-readable instructions, and a processor, configured to execute the one or more computer-readable instructions. The velocity control device monitors one or more parameters associated with the transportation system, receives data associated with the one or more parameters from one or more sources, obtain a current velocity of the transportation system based on at least one of the one or more parameters, obtains a current acceleration associated with the transportation system based on at least one of the one or more parameters, and causes the transportation system to adjust the first acceleration to the second acceleration.

The purpose of the present disclosure is to improve responsiveness by feedforward control. A control system (1) controls a motor (M1) by semi-closed control. A calculation unit (71) generates a total manipulated variable (S5) by adding a plurality of manipulated variables, including a feedforward manipulated variable (S1) and a feedback manipulated variable (S3). A control command unit (7) outputs a control command for controlling the motor (M1) on the basis of the total manipulated variable (S5). When a switching condition is satisfied, a correction unit (6) increases the absolute value of the total manipulated variable (S5). The switching condition includes that the sign of the feedforward manipulated variable (S1) and the sign of the feedback manipulated variable (S3) are different.

The invention is suitable for the technical field of unmanned aerial vehicle manufacturing, and provides an intelligent remote sensing unmanned aerial vehicle which comprises a fuselage, a landing gear is fixedly connected to the bottom of the fuselage, four connecting rods are connected to the fuselage at equal intervals, a plurality of through air holes are formed in each connecting rod, propellers are fixedly connected to the ends of the connecting rods, and the propellers are connected to the bottom of the fuselage. The propellers are jointly and electrically connected with a battery, the battery is fixed in the fuselage, and a camera is arranged on one side of the battery; and the rotating speed control system comprises a flight speed regulation and control module which can construct a flight speed regulation and control model according to the current flight speed and the flight risk assessment index and output the target flight speed. According to the method, the dynamic amplification effect of the sensor error on the flight risk can be quantified in real time, risk misjudgment caused by sensor precision reduction in a complex meteorological environment or in a takeoff / landing key stage is avoided, and thus the accuracy of flight risk assessment and the reliability of autonomous decision making are improved.

The invention relates to a speed control system (6) with a speed control architecture (1) for adaptive control of the longitudinal dynamics of a vehicle, the speed control system (6) comprising sensors, including at least sensors for environment detection and actuators, including at least actuators for effecting a longitudinal movement as longitudinal dynamics, characterized in that the speed control architecture (1), wherein the speed control architecture (1)) comprises several subsystems which host different modules, wherein the modules access each other.

A method for alarming oil leakage in a hydro-generator speed control system includes the following steps: S1, reading historical time-series data of oil level in the pressure tank and oil level in the sump; S2, performing steady-state screening on the historical time-series data of oil level in the pressure tank and oil level in the sump to obtain steady-state historical time-series data of oil level in the pressure tank and oil level in the sump, H1 and H2; S3, performing linear fitting on H1 and H2 in S2 using the least squares method to obtain the fitting result, where k is the linear coefficient obtained by the least squares method fitting, b is the constant term obtained by the least squares method fitting, and is the estimated value of H2, and the fitting deviation y is calculated. The technical problem to be solved by this invention is to provide an alarm method for oil leakage in a hydro-generator speed control system. This method comprehensively considers the oil level values ​​of the pressure tank and oil sump in the hydro-generator speed control system, and can issue an alarm in the early stage of oil leakage fault.

The invention relates to a speed control system (100) for a vehicle and a method for operating such a speed control system (100).The speed control system (100) comprises: a sensor system (101) designed and configured to acquire sensor data SDAT from the vehicle's surroundings and, based on the acquired sensor data SDAT, to determine a currently usable lane width FSB ahead of the lane currently used by the vehicle; an interface (102) by means of which a potentially usable lane width PNFSB can be provided for the lane ahead of the vehicle, with FSB ≤ PNFSB; an evaluation unit (103) designed and configured to calculate a difference D = PNFSB - FSB between the potentially usable lane width PNFSB and the determined currently usable lane width FSB, a first risk value RISK1 based on the difference D, and a current target speed v based on the risk value RISK1. SOLLto determine the longitudinal speed; wherein the cruise control system (100) is designed and configured to reduce the speed of the vehicle to the target speed v SOLL to regulate.

This utility model discloses a sports cooling fan, including a fan module and a main unit module. The fan module includes a waterproof high-power fan with a rotating clamping assembly on one side. The main unit module includes a waterproof control box containing a battery. A stepless speed control circuit board is located in the waterproof control box and on one side of the battery. The stepless speed control circuit board has a speed control knob extending outside the waterproof control box and a power connector extending outside the waterproof control box. The power connector is connected to the waterproof high-power fan via a spring wire. Beneficial effects: Through a split design, backpack shoulder strap fixing structure, waterproof high-power fan, stepless speed control system, and multi-module integrated design, it achieves the effects of not interfering with exercise, strong airflow cooling, waterproof durability, and convenient operation.

A method for controlling the rotational speed or the torque of a motor to protect a suppressor diode in a control device of a vehicle, wherein the suppressor diode converts recuperation energy of the motor into thermal energy comprises determining the current junction temperature and / or diode voltage of the suppressor diode; and controlling the rotational speed or the torque of the motor by means of the current junction temperature and / or diode voltage in such a way that the junction temperature of the suppressor diode does not exceed a predetermined junction temperature limit value.

The invention provides a device and a method for conveying materials towards material containing equipment. The device comprises a guide mechanism, a material conveying mechanism, a lifting mechanism, a limiting mechanism and a control system. One end of the guide mechanism is lapped on the material containing equipment, and the other end is driven by the lifting mechanism to vertically move; the material conveying mechanism is arranged on the guiding mechanism through walking wheels. The limiting mechanism is matched with the second stop block through the movable stop block to form a limiting space; the control system detects the loading amount through the gravity sensor and controls the running speed of the material conveying mechanism through the laser scanning part and the traction mechanism. Automatic material conveying is achieved through gravity, the loading precision is guaranteed through the limiting mechanism, operation safety is guaranteed through the buffering mechanism and the speed control system, the problems that manual conveying is low in efficiency and poor in safety are effectively solved, and the automatic material conveying device is particularly suitable for limited construction environments of places such as new energy electric power construction.

The invention discloses a commercial vehicle load detection and self-adaptive speed limit control system and method and a vehicle, and the system comprises a load detection module which is used for detecting the load mass of the vehicle in real time and generating a load signal; the central control unit is in communication connection with the load detection module and used for receiving the load signal, comparing the load signal with a preset load threshold value and generating a speed limiting control instruction when the load mass indicated by the load signal exceeds the load threshold value; the vehicle speed limiting module is in communication connection with the central control unit and is used for receiving the speed limiting control instruction and intervening a power system of the vehicle according to the speed limiting control instruction so as to limit the highest running speed of the vehicle below a preset safety speed; and the man-machine interaction module is in communication connection with the central control unit and is used for providing overload and speed limit warning information for a driver when the central control unit judges that overload occurs. And the vehicle loading state is associated with the highest running speed, and the active safety of the vehicle under the overload working condition is improved.

Aspects of the present invention relate to an automatic speed control system, a method (200) for automatically controlling the speed of a vehicle, and a vehicle comprising the system or for carrying out the method. The system and method obtains (202) an initial speed limit, wherein the initial speed limit is the speed limit at a location of the vehicle, receives (204) a signal identifying a speed limit offset; and sets (206) the speed of the vehicle to the initial speed limit combined with the offset. The system and method may obtain (208) an updated speed limit and set (210) the speed of the vehicle to the updated speed limit. The system and method may obtain (212) a further speed limit; and if at least one criterion is met (214), set (216) the speed of the vehicle to the further speed limit combined with the offset.

The invention discloses a maximum wind energy tracking method based on a CAOA-Elman model and related equipment. The method comprises the following steps: acquiring operation data of a to-be-tested wind turbine generator; the operation data comprises a wind wheel rotating speed, a pitch angle and generator output power; inputting the operation data into a CAOA-Elman model for wind speed prediction to obtain a wind speed prediction value of the to-be-tested wind turbine generator; calculating a reference rotating speed corresponding to the maximum power point of the to-be-measured wind turbine generator according to the wind speed predicted value of the to-be-measured wind turbine generator and a preset tip speed ratio; and transmitting the reference rotating speed to a rotating speed control system of the wind turbine generator to be tested so as to realize maximum wind energy tracking. According to the invention, efficient operation control under the condition of randomly changing wind speed can be realized.

Aspects of the invention relate to a speed control system for a vehicle comprising one or more processors collectively configured to: receive a signal indicative of a vehicle speed; receive a signal indicative of at least one vehicle body acceleration component; determine a first score; determine a second score; determine a permitted score range including the first score; determine whether the second score is within the permitted score range; if the second score is within the permitted score range, generate a vehicle acceleration request; and if the second score is not within the permitted score range, determine a third score being an endpoint of the permitted score range closest to the second score and generate a vehicle acceleration request. Further aspects of the invention relate to a corresponding system and vehicle comprising the speed control system, a corresponding method, and a computer-readable instructions arranged to perform the method.

Aspects of the present invention relate to a speed control system for a vehicle (10) which is configured to cause the vehicle to operate in accordance with a target speed value. The speed control syst

The utility model discloses a dual-motor multi-gear hybrid power speed control system which comprises a first motor, a second motor, an engine and a transmission mechanism. The transmission mechanism comprises an output shaft, a first input shaft, a second input shaft, a first-gear gear assembly, a second-gear gear assembly, a second-gear gear assembly and a third-gear gear assembly, wherein the first input shaft and the second input shaft can be operated to achieve power combination or disconnection; the first-gear gear assembly is arranged between the first input shaft and the output shaft and used for shifting gears to transmit power; the second-gear gear assembly is arranged between the second input shaft and the output shaft and is used for shifting a gear to transmit power; the output end of the first motor is in transmission connection with the first input shaft, the output end of the second motor is in transmission connection with the second input shaft, and the output end of the engine is in transmission connection with the output shaft of the first motor or the second motor; according to the dual-motor multi-gear hybrid power speed change system, the optimization effect on the use efficiency of the motors and the engine can be improved, the use comfort can be improved, meanwhile, the system structure can be simplified, and the compactness of the system can be improved.

This invention discloses a belt conveyor speed control system and method. The system includes a control module, a conveyor belt, and a depth camera. The conveyor belt includes a speed control belt and at least one coal mining belt. The coal mining belt overlaps with the speed control belt, and a depth camera is installed at a monitoring point on each coal mining belt. The depth camera is used to acquire coal quantity data on the coal mining belt. The control module is communicatively connected to the depth camera. The control module is used to obtain the predicted flow rate at the coal drop point at the overlap of the coal mining belt and the speed control belt based on the coal quantity data corresponding to the coal mining belt, select the maximum value of the predicted flow rate corresponding to the coal drop point, and adjust the operating speed of the speed control belt according to the maximum value of the predicted flow rate and the rated flow rate of the speed control belt. The technical solution provided by this invention achieves energy saving of the speed control belt based on operating conditions.

An oscillator (2), particularly a balance wheel (21) / main spring (22) oscillator, includes an inertial element (21) and a return spring (22) that rotate around a pivot axis, Escapement (3), especially dual impulse escapement, especially Swiss lever escapement (3), A method for adjusting a speed control system (100), including, The adjustment method is to facilitate and / or balance the restart of the speed control system. Steps to adjust the beat setting, in particular to a non-zero value, and / or A step of adjusting the degree to which the anchor assembly (31) is inserted into the escape wheel (32), and / or A step to adjust the degree to which the anchor assembly is inserted into the escape wheel. including, Adjustment method.

A method of a control system for controlling a vehicle speed v of a vehicle is presented. The method comprises: controlling the vehicle speed v towards an adjusted reference speed vref_adj based on: a reference speed vref provided by a speed control system of the vehicle; a usable road width Wur of a road section ahead of the vehicle; and an effective vehicle width Wev of the vehicle. Hereby, the safety and comfort of the driver is improved.

The invention provides an air blower speed regulation system and method based on a hardware circuit and a vehicle, and belongs to the technical field of vehicle control. The system comprises a gear voltage generation circuit, an air blower rotating speed gear acquisition circuit and a gear comparison circuit, the gear voltage generation circuit is used for converting a PWM signal of a target gear output by the main control module into a first voltage signal representing the target gear; the blower rotating speed gear acquisition circuit is used for acquiring the current rotating speed of the blower and converting the current rotating speed into a second voltage signal; the gear comparison circuit is used for comparing the first voltage signal with the second voltage signal to obtain a comparison result, so that the control end of the air blower controls the current flowing through the air blower based on the comparison result, the air blower is turned on or turned off, and therefore speed regulation is achieved. The system controls on-off of the blower through hardware, so that speed regulation of the blower can be realized without a software algorithm, master control resources are effectively saved, and the development period is shortened.