96results about How to "Achieve speed control" patented technology

The invention discloses a permanent magnet synchronous motor speed composite control method based on a continuous terminal slip form technology. According to a vector control principle, a permanent magnet synchronous motor system is decoupled into a speed ring and a current ring which are controlled respectively. The speed ring is controlled by using the composite control method. A continuous terminal slip form controller serves as a feedback controller, the speed of a permanent magnet synchronous motor can be responded quickly in a whole adjusting process, and the problem of buffeting on slip form control is solved; a disturbance term of the speed ring is observed by a second-order limited time disturbance observer; and the second-order limited time disturbance observer which serves as a feedforward compensator has real-time observation and disturbance compensation functions. When errors are observed without disturbance, the revolving speed of the permanent magnet synchronous motor can reach reference revolving speed within a limited time; and when disturbance observation errors are bounded (img file= ' DDA0000581681490000011.TIF' wi= '35' he= '41'/), the revolving speed of the permanent magnet synchronous motor can reach a neighborhood of the reference revolving speed (img file= 'DDA0000581681490000012. TIF' wi= '50' he= '48'/). By the composite control method, the revolving speed of the permanent magnet synchronous motor can be adjusted effectively, and the adjusting speed and the robustness are high.

The invention relates to a method which is based on the technology of satellite differential positioning and inertial navigation, employs the data fusion and wireless bandwidth data communication, and achieves the precise positioning of a vehicle. The invention aims at effectively integrating various types of positioning navigation technologies, the data fusion and the wireless bandwidth data communication into a seamless positioning system suitable for intelligent traffic, providing real-time stable continuous position information for a sub-meter level to a centimeter level for a running vehicle, and achieving the lane-level positioning navigation of the vehicle. The technical scheme of the invention is that the method employs a reference station and a moving terminal, wherein the reference station is installed nearby a road, and consists of a satellite receiver of the reference station and a wireless bandwidth data communication module; the data is transmitted according to the demands of the moving terminal; the moving terminal is disposed on the vehicle, consists of the wireless bandwidth data communication module and a combined positioning system, can actively visit a plurality of reference stations for obtaining data to complete the multi-base-station differential positioning, and also can adjust the updating frequency of data transmission in real time.

The invention discloses a self-adaption sliding mode control method for speed regulation of a variable-load permanent magnet synchronous motor. According to the method, on the conditions that a speed reference value of the permanent magnet synchronous motor is given and a load changes, second-order finite time disturbance observers are designed respectively for step interference and successive interference, load changes are estimated and compensated for, an absolute value fractional order sliding mode surface is designed, an improved power reaching law method is provided, and a continuous sliding mode controller is designed. A self-adaption sliding mode controller composed of the second-order finite time disturbance observers and the continuous sliding mode controller is used for conducting speed regulation on the permanent magnet synchronous motor to enable the motor to be still capable of running at reference speed after the load changes, and the influences brought by load changes to the rotation speed of the motor are greatly reduced. The self-adaption sliding mode control method inherits good robustness of sliding mode control; meanwhile, the expanded second-order finite time disturbance observers are used for observing step signals, rotation speed fluctuation on the condition that the load changes is reduced, and the driving capacity of the permanent magnet synchronous motor is effectively improved.

The invention relates to an accurate positioning method based on the fusion of the satellite differential positioning technology and the wireless broadband data communication technology, and aims to provide the high-accuracy positioning information for a vehicle that is travelling at a high speed. According to the invention, the pseudo-range differential positioning technology, the RTK differential positioning technology and a broadband data communication system are integrated and then a positioning system based on the satellite differential positioning technology and the wireless broadband data communication network is provided. As a result, the real-time and stable information from the sub-meter level to the centimeter level, including the accurate position, the speed and the time information, is provided for the vehicle travelling at the high speed. Therefore, the vehicle can be positioned and tracked on the lane level. According to the technical scheme of the invention, the system comprises a base station part and a movable terminal part. The base station part is arranged on a base station around a road, and is composed of a GNSS reference station receiving system and a wireless broadband communication module. The mobile terminal part is installed on the vehicle and is composed of a GNSS mobile station receiving system and a wireless broadband communication module.

The invention relates to a compact AGV (Automated Guided Vehicle) driving and steering integrated device which comprises a diving module, an independent steering module and a transmission module, wherein the driving module comprises a driving motor and a driving wheel; the transmission module comprises a supporting seat and a secondary retarding mechanism; the secondary retarding mechanism comprises a transmission gear wheel and a gear shaft; the gear shaft is rotatably mounted in the supporting seat; the transmission gear wheel is fixedly mounted on the gear shaft; the gear shaft is provided with outer teeth; the outer teeth are meshed with an inner gear ring of the driving wheel; a thin-wall bearing is mounted in the driving wheel; an inner ring of the thin-wall bearing is fixedly mounted on the supporting seat; an outer ring of the thin-wall bearing is fixed on the driving wheel with the inner gear ring; a transmission pinion is mounted on an output shaft of the driving motor; the transmission pinion is meshed with the transmission gear wheel; the independent steering module is mounted on the supporting seat. The invention provides the compact AGV driving and steering integrated device which has a simplified structure, a reduced volume and excellent flexibility.

The invention relates to a misaligned spline vibration wear experimental device and belongs to the aeronautics and astronautics vibration field. The misaligned spline vibration wear experimental device is characterized in that the misaligned spline vibration wear experimental device is composed of temperature sensors, constant-temperature covers, ball bearings, vibration displacement sensors, wheel discs, a rotor 1, bearing seats, grease collecting covers, spline jackets, splines, a rotor 2, double-row bearings, a motor, a frequency converter, a synchronizing belt, a synchronizing wheel, a driven wheel, a preamplifier, a signal acquisition device, an industrial personal computer, a rotor 3, a rotation speed sensor, electric heating wires, bearing elevation adjusting devices, an integrated bearing seat, a basic platform, infrared thermometers, flexible couplings and magnetic powder brakes. The misaligned spline vibration wear experimental device of the invention has a spline comprehensive condition contrast test function, a spline lubricating oil temperature and temperature rise research function, a spline/bearing misalignment research function, a spline engaging torque loading function and a comprehensive data online monitoring function. The misaligned spline vibration wear experimental device is advantageous in multiple experiment functions, strong comparability, excellent repeatability, stable operation, convenience in assembly and disassembly.

Provided is an integrated electronic speed-differentiate and speed-regulation centralized control method and a device thereof. The integrated electronic speed-differentiate and speed-regulation centralized control method comprises an expected speed processing unit, an actual speed processing unit, a subtraction module, a PI algorithm module, a speed-differentiate distribution module, a left wheel drive unit and a right wheel drive unit. The integrated electronic speed-differentiate and speed-regulation centralized control method is characterized in that the expected speed processing unit, the actual speed processing unit, the subtraction module and the PI algorithm module can synergistically achieve a speed control function, the PI algorithm module sends a speed control output signal to the speed-differentiate distribution module, and the speed-differentiate distribution module uses an angle signal of a turning sensor to send the control signals of a left wheel driver and a right wheel driver to the left wheel drive unit and the right wheel drive unit. The integrated electronic speed-differentiate and speed-regulation centralized control method further provides the functions of speed-differentiate and speed-regulation, the system integration level and stability of a double-wheel-hub drive system are improved, and the maximum saving of the system and overall optimization are achieved.

The invention provides a permanent magnet synchronous motor current tracking control method based on indeterminate frequency hysteresis and SVPWM. The method aims to achieve speed control of a permanent magnet synchronous motor by means of combination of indeterminate frequency hysteresis and SVPWM on the basis of a current tracking mode according to a model of the permanent magnet synchronous motor, so that the permanent magnet synchronous motor has a relatively high response speed. The method includes the following steps of (1) collecting a three-phase current signal, a three-phase voltage signal and a rotation speed signal, (2) building a system mathematic model of a three-phase inverter, (3) positioning areas where instructional voltage and instructional current are located, (4) determining a switch tube control rule of the inverter to limit switching frequency, and (5) selecting a voltage vector enabling error currents to be smaller and the switching frequency to be low according to the position of the error currents. The method has the advantages of being simple, reliable and easy to achieve, achieving speed control of the permanent magnet synchronous motor by the adoption of the mode combining indeterminate frequency hysteresis and SVPWM, and achieving quick response during speed changing.

The invention discloses a submersible pump switched reluctance motor control system and a control method thereof. The system comprises a power supply module, a switched reluctance motor, a power converter module, a controller module, a motor bus voltage sensor module, a motor bus current sensor module and a motor phase current sensor module. When a submersible pump works, the controller module receives a control instruction of an upper computer controller directly or through a serial port cable, and controls motor rotation speed and current; and meanwhile, the controller module realizes fault diagnosis and processing of the switched reluctance motor through detection and processing of sensor signals in the pump; torque unsmoothness due to unreasonable parameter setting and error tracking delay and the like in a conventional PID control algorithm is thoroughly eliminated; and the controller helps to improve system efficiency, meets requirements for low speed large starting torque, middle speed high efficiency and wide constant power range for the motor of the submersible pump, and can enable the switched reluctance motor to be widely applied in the submersible pump field.

The embodiment of the invention provides a vehicle speed control method and system based on the internet of vehicles. The method mainly includes the steps of calculating the distance between a vehicle and a vehicle in the front on the basis of the internet of vehicles, calculating the mutual action force between the vehicle and the vehicle in the front according to the distance between the vehicle and the vehicle in the front and the speed of the vehicle, and controlling the speed of the vehicle according to the mutual action force of the vehicle and the vehicle in the front. Analogy is conducted on the relation between the vehicles and the intermolecular force on the basis of the mutual action force, calculated on the basis of the internet of vehicles, between the vehicle and the vehicle in the front, the near-distance repulsive force and the long-distance attraction force which are represented by the intermolecular force are quite similar to the actual approaching process and the actual separating process of the vehicle and the vehicle in the front, and therefore a new vehicle mobility model modeling method and thought are put forward, and the advancing speed of the vehicles are controlled according to the mutual action force between the vehicles.

The invention relates to an energy storage type electric control driving system of a workover rig, which comprises a permanent-magnet machine, a permanent-magnet machine controller assembly and an energy storage assembly, wherein the permanent-magnet machine controller assembly is connected with the permanent-magnet machine and the energy storage assembly respectively. Compared with the prior art,the energy storage type electric control driving system of the workover rig has the characteristics of high dynamic efficiency of the workover rig, high mechanical transmission efficiency, small volume, light weight, steel material conservation, low cost and the like.

The invention provides an overturning type elevator hydraulic system based on loading opening independent control. The overturning type elevator hydraulic system based on loading opening independent control comprises an oil tank, a metering pump, a first overflow valve, an oil supply valve group, a hydraulic lock valve group, a sequence valve group and an executing mechanism, wherein the oil tankis used for storing the hydraulic oil required by the hydraulic system; the metering pump is used for providing hydraulic oil at a constant flow rate for the hydraulic system; the first overflow valveis used for enabling the hydraulic system to realize overflow at a constant pressure; the oil supply valve group is used for supplying oil for the hydraulic system, and controlling the executing mechanism to move; the hydraulic lock valve group is used for closing an oil channel; the sequence valve group is used for controlling the sequence of extending and contracting of the executing mechanism;and the executing mechanism comprises a valve hydraulic cylinder, a lock bolt hydraulic cylinder, an overturning hydraulic cylinder, a hoisting touch spring cylinder, an induction lock bolt spring cylinder and a top drive discharging spring cylinder. Through the adoption of the overturning type elevator hydraulic system based on loading opening independent control disclosed by the invention, theproblem that at present, the hydraulic system of the overturning elevator cannot well meet all kinds of functional requirements of the overturning elevator is solved; the function requirements of a valve, a lock bolt, overturning and the like are realized; a hoisting touch signal, a sensing lock bolt closing signal, and a top drive discharging signal can be detected through a hydraulic pipeline, so that automatic control of elevator operation is realized.

The invention discloses a double-phase driving synchronization method of a cracking furnace tube outer wall temperature measurer, which comprises the steps of starting the temperature measurer; waiting for the measuring signal; driving a temperature measurement driving bench by a horizontal driving motor, and the temperature measurement driving bench drives the temperature measurer to move on a guide rail along the direction of a fire-observing hole of the cracking furnace until reaching to the initial position of the fire-observing hole, and then driving a revolver by the rotation driving motor, and the revolver drives the temperature measurer to rotate until reaching to the initial angle. The method also comprises the step that the horizontal driving motor cooperates with the rotation driving motor, and the temperature measurer can revolve while moving along the guide rail, and the light spot emitted by the temperature measurer can be scanned to the outer wall of each furnace tube corresponding to the fire-observing hole. The scanning of the furnace tube corresponding to the fire-observing hole is completed, and the horizontal driving motor and the rotation driving motor stop running, and the measuring of the next fire-observing hole can be prepared. The double-phase driving synchronization method of a cracking furnace tube outer wall temperature measurer is advantageous in that the horizontal driving motor drives the temperature measurement driving bench, and the revolver is driven by the rotation driving motor, and the double-phase movement of the temperature measurer can be realized.

The invention belongs to the field of immiscible alloy particles and particularly discloses hollow Co42.5Cu42.5Pb15 alloy particles and a manufacturing method of the hollow Co42.5Cu42.5Pb15 alloy particles. According to the method, a solidifying and forming device is adopted, through the reasonably-designed alloy composition proportion, the pressure of two vacuum chambers and the roll surface linear speed of a Cu roll, the hollow Co42.5Cu42.5Pb15 alloy particles are obtained. According to the obtained hollow Co42.5Cu42.5Pb15 alloy particles, the sphericity is high, the surface is smooth, the surface layers of the particles are free of cracks or gaps, a solidifying reaction is only generated in the particles, phase precipitation is simple, the operation process is simple, and the cost is low.

The invention discloses a single-action double-graded hydraulic cylinder and an engineering machine. The single-action double-graded hydraulic cylinder comprises a cylinder body, a primary cylinder barrel, a throttling pore plate and a secondary cylinder rod, wherein a primary guide sleeve is arranged at one end of the cylinder body; the primary cylinder barrel stretches into the cylinder body and can be arranged in the primary guide sleeve in a sliding manner; the primary cylinder barrel comprises a cylinder barrel and a primary piston; the throttling pore plate is fixedly connected with the inner wall of the primary piston; the secondary cylinder rod comprises a cylinder rod and a secondary piston; the secondary cylinder rod stretches into a chamber of the primary cylinder barrel and can be arranged in the secondary guide sleeve in a sliding manner; a piston of the primary cylinder barrel is internally provided with the throttling pore plate by the hydraulic cylinder; and a speed difference between the primary cylinder barrel and the secondary cylinder rod is adjusted by a throttling hole, so that when the primary cylinder barrel moves, the primary cylinder barrel and the secondary cylinder rod are relatively static and can move at the same speed. The single-action double-graded hydraulic cylinder has the advantages that the structure is simple; speed control between the adjacent cylinders can be realized without additionally arranging an auxiliary element; and the speed control is simple and the product cost is low.

The invention relates to the technical field of robots and particularly relates to an aquatic robot intelligent constant-speed cruising control method and system. The method comprises the following steps: setting power parameters such as a target cruising speed; obtaining a water flow speed; judging whether constant-speed cruising requirements are met according to the water flow speed; if the constant-speed cruising requirements are met, entering a constant-speed cruising mode by one key; in the constant-speed cruising mode, periodically and dynamically calculating the accelerator power based on the parameters such as ground speed vectors of an attitude heading reference system of an aquatic robot master controller to guarantee a constant speed; in the constant-speed cruising mode, supporting the modification of the cruising speed and automatically executing power judgment and continuous operation; and if the constant-speed cruising requirements are not met, executing the nearest and fastest automatic return intelligent protection policy.

The embodiment of the invention discloses a control system of a hair dryer. The hair dryer comprises an electronic switch, wherein the electronic switch is electrically connected with a circuit board.The control system comprises a power module and a controller, the power module is used for providing an AC power supply and a DC power supply for the system, and the controller is electrically connected with the power module, a motor control unit and a heater control unit and is used for acquiring an electrical signal generated after the electronic switch is triggered, generating a correspondingmotor control instruction or a heater control instruction according to the electrical signal, sending the motor control instruction to the motor control unit so as to achieve rotational speed controlof a motor and sending the heater control instruction to the heater control unit so as to achieve heating temperature control of a heating component. By the system, the service lifetime of the hair dryer is prolonged, so that the hair dryer has more convenient control performance, the spurious triggering probability is effectively reduced, and the appearance of the hair dryer is more comprehensive.

The invention belongs to the technical field of electric vehicle permanent magnet synchronous motor control, and discloses a design method of an anti-disturbance composite controller of a low-speed large-torque direct drive motor. The problem that when the permanent magnet synchronous motor of the electric automobile operates at low speed and large torque, an inverter can output discontinuous current, and consequently torque pulsation is caused is solved. The invention provides a low-speed large-torque permanent magnet synchronous motor control method based on a nonsingular terminal sliding mode load observer. Firstly, permanent magnet synchronous motor rotation speed sliding mode control is provided by adopting a sliding mode reaching law of segmented rate adjustment; secondly, providing a non-singular terminal sliding mode load observer aiming at the unknown condition of load disturbance, and establishing an anti-interference composite controller on the basis of rotation speed sliding mode control; and finally, through simulation experiment verification, the method provided by the invention can realize the stability of the output torque and the rotating speed under complex interference.

The invention provides an intelligent pH-catalytic-response micro-nano robot. The intelligent pH-catalytic-response micro-nano robot is characterized by comprising a porous skeleton internally and totally loaded with succinylation beta-lactoglobulin and catalase, wherein the succinylation beta-lactoglobulin is beta-lactoglobulin modified by succinylation, and the porous skeleton is a ZIF-L metal organic frame. The invention provides an assembling method for the intelligent pH-catalytic-response micro-nano robot, and the assembling method includes the following steps that 1, the beta-lactoglobulin is subjected to succinylation modification to obtain the succinylation beta-lactoglobulin; 2, the succinylation beta-lactoglobulin, the catalase and a 2-methylimidazole water solution are mixed, azinc ion solution is added, the mixture continues to stir for preset time, centrifugal separation is carried out, and the intelligent pH-catalytic-response micro-nano robot is obtained. The inventionprovides application of the intelligent pH-catalytic-response micro-nano robot as a carrier to preparing tumor treatment medicine.

The invention discloses an air inlet automatic control engine. The air inlet automatic control engine comprises an engine body and an automatic control air inlet system, an air inlet of the engine body is in communication with an air outlet of the automatic control air inlet system, an air inlet of the automatic control system is provided with a connecting cavity and a sensor, the connecting cavity is connected with a natural gas inlet pipe and/or an air pressurizer, and the sensor is connected with an air pressurizer through a controller in the automatic control air inlet system. The automatic control system has the advantages that automatic control of an engine air inlet system is achieved, and the negative pressure air inlet phenomenon is effectively eliminated; the air inlet pressure and the temperature are ensured to be stable; the air inlet flow is synchronously changed along with the oil inlet flow, so that the engine achieves high-efficiency, energy-saving and environment-friendly operation levels; the tail gas emission is lower than the emission standard, so that the problem of black smoke of a diesel engine is effectively solved; high-pressure steam is generated by a heatexchanger, a double-gas-drive steam turbine and a turbocharger increase the power, so that the risk of high-temperature inflammability of the turbocharger is eliminated and the rotating speed of theturbocharger is controlled.

The invention discloses a wireless detection control device for motorcycle helmet wearing. The wireless detection control device comprises a detection assembly and a control system, wherein the detection assembly comprises a helmet wearing sensor, an installing base, a portable power source, a signal projector and a helmet; the control system comprises a normally-closed relay, a remote switch, a storage battery, a motorcycle ECU, an alarming apparatus, a speed controller and a motorcycle throttle valve motor; the motorcycle ECU, the storage battery, the remote switch, the speed controller andthe motorcycle throttle valve motor are sequentially connected in series to form a detection circuit, the storage battery, contacts of the normally-closed relay and the alarming apparatus are connected in series to form an alarm circuit, and the storage battery, the remote switch and a coil of the normally-closed relay are connected in series to form an alarm control circuit. According to the wireless detection control device for motorcycle helmet wearing in the mode, wireless detection of helmet wearing is achieved, the driving safety is improved, the using convenience is high, and the helmetwearing comfort is not influenced.

The invention relates to an ozone autologous blood transfusion therapeutic apparatus. According to the technical scheme provided by the invention, the ozone autologous blood transfusion therapeutic apparatus comprises a blood storage bag capable of storing drawn blood, an ozone gas generating and conveying mechanism capable of conveying required medical ozone to the blood storage bag, and a blood drawing and conveying mechanism capable of drawing and conveying blood; a vibration mechanism is arranged on the blood storage bag, the ozone gas is fed into the blood storage bag through the ozone gas generating and conveying mechanism, and to-be-mixed blood is fed into the blood storage bag through the blood drawing and conveying mechanism; and the blood in the blood storage bag and the medical ozone entering the blood storage bag can be uniformly mixed during vibration through the vibration mechanism, and the blood uniformly mixed with the medical ozone, in the blood storage bag, can be conveyed into a human body through the blood drawing and conveying mechanism after being filtered. The ozone autologous blood transfusion therapeutic apparatus can effectively implement uniform mixing between the medical ozone and the drawn blood, is in a totally closed state in a whole process to reduce the contact with the outside, thereby improving the safety and reliability of treatment.