86 results about "Torque coefficient" patented technology

The invention provides a wind turbine generator blade pneumatic unbalance monitoring method and system based on a torque coefficient, and belongs to the technical field of data processing. Real-time operation data of a wind turbine generator under various operation conditions are collected, time sequence correlation processing is carried out on the real-time operation data, and the wind turbine generator blade pneumatic unbalance monitoring method and system based on the torque coefficient are obtained. A torque coefficient time sequence containing continuous timestamp marks and corresponding wind speed fluctuation characteristics are generated, pneumatic deviation analysis is constructed, a theoretical expected value and an actual measurement value of a torque coefficient are dynamically compared, and an initial imbalance index is generated; calling a pre-trained error compensation network to carry out environmental interference factor elimination processing on the initial imbalance index, and outputting a corrected imbalance index after environmental interference elimination; and then, constructing a blade pneumatic state evaluation model based on the result, and generating a blade pneumatic unbalance monitoring result containing an unbalance level and an early warning suggestion. According to the invention, the accuracy of the monitoring result can be improved.

The invention relates to the technical field of motor control, and discloses a torque adjustment control method of a magnetic stirrer based on sample characteristics, which comprises the following steps: acquiring an armature three-phase current and a rotor position signal, and converting the armature three-phase current and the rotor position signal into a quadrature-axis actually measured current and a direct-axis actually measured current by utilizing coordinate transformation logic; extracting a magnetic declination estimated value reflecting the phase lag degree of the stirrer based on an electromagnetic coupling model; calculating a magnetic declination change rate according to the magnetic declination estimated value of the continuous sampling period; a transient compensation current is generated by adopting a nonlinear compensation operator and combining a real-time synchronous torque coefficient; according to the invention, the transient characteristics of the magnetic declination are utilized to realize the real-time sensing of the load disturbance, the magnetic coupling slippage caused by the sudden change of the characteristics of the sample is effectively inhibited, and the stability of the magnetic declination is improved. And the ineffective temperature rise of the motor is reduced while the system stability is guaranteed.

The invention discloses an air density fused fan optimal torque coefficient online optimization method and system, belongs to the technical field of wind turbine generator control, and solves the technical problems that torque coefficients are fixed, dynamic air density changes cannot be adapted, and unit individual performance differences cannot be compensated in the prior art. The method comprises the following steps: constructing an air density-oriented adaptive Markov decision process model, and obtaining a state vector according to the air density; constructing an intelligent agent architecture based on a double-delay depth deterministic strategy gradient, wherein the intelligent agent architecture comprises a strategy network, two value networks and corresponding target network clusters; training and optimizing the agent architecture based on the double-delay depth deterministic strategy gradient; and performing forward propagation calculation on the state vector by adopting the trained agent architecture to obtain an optimal torque coefficient in the current state. The method is suitable for a wind turbine generator torque control scene.

This application belongs to the technical field of bolt fastener tightening torque coefficient measurement in low-temperature environments, specifically relating to a device and method for measuring the bolt fastener tightening torque coefficient at -196℃. The device includes a low-temperature environment chamber, a bolt clamp, a nut tightening tool, and an axial force gauge. The low-temperature environment chamber has a liquid nitrogen injection hole. The bolt clamp is installed inside the chamber to clamp the head of the test bolt. One end of the nut tightening tool is located outside the chamber and is used to connect a tightening drive tool and its torque sensor; the other end extends into the chamber to hold the test nut and tighten it onto the bolt thread. The axial force gauge is fitted onto the outer circumference of the bolt thread to measure the preload between the bolt and the nut.

The invention provides a steering wheel torque control method and device, a medium and a vehicle, and relates to the technical field of intelligent drive.The method comprises the steps that under the condition that the transverse control state of the vehicle is a target driving state, first torque acting on a steering wheel by a driver and second torque output by an auxiliary driving system are obtained in real time; determining a torque coefficient of the auxiliary driving system according to a manual torque threshold lower limit, a manual torque threshold upper limit and the first torque; determining a total torque output by a steering wheel according to the first torque, the second torque and a torque coefficient of the auxiliary driving system; and controlling the vehicle to run according to the total torque output by the steering wheel. When the driver and the auxiliary driving system jointly participate in control, torque output of the auxiliary driving system can be dynamically adjusted, so that smooth man-machine interaction and vehicle control are achieved.

The application discloses a lane keeping assistance control method and device, electronic equipment and storage medium. The lane keeping assistance control method comprises the following steps: determining a corresponding first torque coefficient TF according to an LKA intervention stage lka ; determining a second torque coefficient TF according to a control intention of a driver drv ; and determining a target torque coefficient TF according to the first torque coefficient TF lka and the second torque coefficient TF drv . The method has the beneficial effect that the first torque coefficient TF is determined according to the LKA intervention stage lka , the second torque coefficient TF is determined according to the control intention of the driver drv , and the target torque coefficient TF is determined according to the first torque coefficient TF lka and the second torque coefficient TF drv , so that a better man-machine co-driving effect can be achieved by adjusting an EPS application torque coefficient in real time without adding additional hardware devices.

Provided are a method for controlling a motor, a controller, a fitness bike and a storage medium. The method includes: acquiring a vehicle parameter of a fitness bike and an operating parameter of the fitness bike in a present control cycle; determining first power applied to the fitness bike by a user according to the present torque current, the torque coefficient and the present rotational speed; determining second power applied to the fitness bike by the overall resistance according to the overall resistance, the wheel radius and the present rotational speed; and determining a given rotational speed of the motor in the next control cycle according to the total weight, the wheel radius, the first power and the second power, and controlling the motor to operate according to the given rotational speed in the next control cycle.

The invention relates to the technical field of new energy commercial vehicles, and particularly provides a hybrid commercial vehicle energy recovery control method, system and device and a storage medium, and the method comprises the steps: collecting and processing multi-source information including brake pedal opening, vehicle state and chassis system signals in real time, and obtaining predictive road condition information in front of the vehicle; identifying the intention of a driver according to the multi-source information and the predictive road condition information; whether energy recovery is allowed or not is judged based on the intention of the driver and the pre-recognized driving style, the optimal motor negative torque is calculated through a model prediction control algorithm when energy recovery is allowed, and the torque coefficient is subjected to self-adaptive correction in combination with the load and the road condition obtained in real time; and based on the optimal motor negative torque and the self-adaptive corrected torque coefficient, collaborative distribution of motor braking force and hydraulic braking force is carried out, and an execution instruction is output. Through multi-source information fusion and predictive control, the comprehensive performance of the hybrid commercial vehicle energy recovery system is effectively improved.

The present application belongs to the field of wind power generation technology, and particularly relates to a wind power generator optimal torque coefficient correction method and device. First, when the wind power generator exits the maximum power tracking state, a plurality of data pairs of the wind power generator in the maximum power tracking state are obtained, one data pair including a wind energy utilization rate and a tip speed ratio corresponding to the wind energy utilization rate; then, the data pairs with the wind energy utilization rate greater than that in the balance state are selected from the obtained data pairs, and a standard tip speed ratio is calculated according to all the tip speed ratios in the selected data pairs; finally, the optimal torque coefficient is corrected by using the difference between the standard tip speed ratio and the tip speed ratio in the balance state, so that the error gradually decreases, and the optimal torque coefficient can be corrected slowly with the changes of the environment and the wind power generator parameters, and the optimal torque coefficient can be kept optimal for a long time by self-correction adjustment, and the power generation performance of the wind power generator is improved.

The application relates to the technical field of motor control, and discloses a torque adjustment control method for a magnetic stirrer based on sample characteristics, which comprises the following steps: acquiring three-phase armature currents and a rotor position signal, converting the three-phase armature currents and the rotor position signal into measured cross-axis currents and measured direct-axis currents by using a coordinate transformation logic; extracting a magnetic deflection angle estimation value reflecting the phase lag degree of a stirrer based on an electromagnetic coupling model; calculating a magnetic deflection angle change rate according to the magnetic deflection angle estimation value in a continuous sampling period; generating a transient compensation current by using a nonlinear compensation operator and combining a real-time synchronous torque coefficient; and superimposing the transient compensation current on the cross-axis current instruction to generate a compensation torque by fine-tuning the rotating angular velocity of the armature magnetic field. The application realizes real-time sensing of load disturbance by using the transient characteristics of the magnetic deflection angle, effectively suppresses magnetic force coupling slip caused by sudden changes in sample characteristics, guarantees the stability of the system, and reduces the invalid temperature rise of the motor.

This invention belongs to the field of electronic digital data processing and discloses a propulsion modeling method for FPSOs based on Modelica, comprising the following steps: S1: Modeling the propulsion coefficient model of the propeller, including calculating the following parameters: thrust coefficient, thrust torque coefficient, thrust gain coefficient, and thrust torque gain coefficient; S2: Modeling the propeller performance model, including calculating the following parameters: wake coefficient, advance number, thrust loss coefficient, and relative rotational efficiency; S3: Based on the results of steps S1 and S2, outputting the thrust and thrust torque of the propeller, thereby obtaining the propulsion efficiency of the propeller. This method can comprehensively simulate the thrust and torque variation characteristics of the propeller under different operating conditions through a discrete dynamic modeling approach, thus providing accurate simulation support for the dynamic response of FPSO systems in complex marine environments.

The invention discloses a method, a device and equipment for determining a torque coefficient of a wind turbine generator and a medium. The method comprises the steps that to-be-processed data of a target wind turbine generator are obtained, the to-be-processed data are preprocessed to obtain to-be-corrected data, and the to-be-processed data at least comprise wind speed data, rotating speed data and power data; based on the factory power curve of the target wind turbine generator, correcting wind speed data in the to-be-corrected data to obtain target processing data; based on the target processing data and a wind turbine generator torque coefficient calculation model, determining a target torque gain coefficient from a plurality of preset torque gain coefficients of the target wind turbine generator; and determining a target torque coefficient based on a product of the target torque gain coefficient and a preset torque coefficient of the target wind turbine generator. According to the scheme, the setting accuracy of the torque coefficient can be improved, and then the overall operation effect of the wind turbine generator is improved.

This invention provides an active power regulation method and system that considers instantaneous energy distribution efficiency, relating to the field of wind power grid-connected control technology. The invention establishes a synchronized operation system model based on the system parameters of the wind turbine and synchronous machine, determines the total inherent active power regulation coefficient and synchronous torque coefficient of the system to obtain the conservative instantaneous power of the synchronized system; introduces an active power regulation proportional coefficient into the model and constructs an instantaneous energy function during synchronized system oscillation, analyzing the instantaneous energy distribution law between synchronized units; after a disturbance, the instantaneous energy distribution efficiency is determined based on the instantaneous energy of the synchronous machine, a target efficiency is given, and the active power regulation proportional coefficient is solved based on the total instantaneous energy conservation, thereby calculating the design value of the active power regulation coefficient and setting it in the active power controller of the wind turbine unit, so that when the system detects frequency or power disturbances, the wind turbine participates in regulation according to the design value, thereby improving the power oscillation suppression capability.

The invention discloses a compressor and a refrigerating system. The compressor comprises a machine shell, a motor and a pump body assembly. The shell is provided with an accommodating cavity; the motor is installed in the containing cavity and comprises a rotor and a stator arranged on the periphery of the rotor in a sleeving mode. The pump body assembly is installed in the containing cavity and comprises a crankshaft, a static scroll plate, a movable scroll plate and a support, and the crankshaft sequentially penetrates through the rotor, the static scroll plate, the movable scroll plate and the support; wherein the torque coefficient K of motor stack output of unit displacement meets the relational expression: K = 2 * (V / T) 1 / 2 / D, V is the displacement of the compressor, T is the stack height of the stator, and D is the outer diameter of the stator. According to the scroll compressor, the problem that in the prior art, the output torque of a motor of a scroll compressor of a penetrating structure is insufficient or wasted can be solved.

The invention relates to a steering control method and device. The steering control method comprises the following steps: acquiring a return demand torque based on the current hand power of a driver, the vehicle speed, the angle of a steering wheel and the angular velocity of the steering wheel so as to perform auxiliary control on the return of the vehicle. Wherein an aligning torque coefficient is obtained based on the steering direction of a steering wheel and the current hand power of a driver; obtaining an initial return demand torque based on the vehicle speed, the steering wheel angle and the steering wheel angular velocity; and obtaining the return demand torque based on the return torque coefficient and the initial return demand torque. By means of the steering control method, the problem that the return speed and the return residual angle of the left side and the right side of the vehicle electro-hydraulic coupling steering system are inconsistent is solved, and the hand feeling impact of taking over of a driver in the return process can be effectively reduced.

An electronic throttle control method by which an electronic control unit (ECU) controls opening and closing of a throttle while providing a control signal on a basis of an input data signal may include calculating, via the ECU, i) an engine revolution speed deviation from a difference between an engine revolution speed and an engine revolution speed command, ii) an engine revolution acceleration on a basis of the engine revolution speed, iii) a proportional torque from a product of the engine revolution speed deviation and a proportional torque coefficient, and iv) an integral torque by multiplying an integral of a product of the engine revolution speed deviation and an integral torque coefficient by a forgetting coefficient. The method may further include providing, via the ECU, the control signal for the throttle using a sum of the proportional torque and the integral torque as a torque command value.

A method for handling brake factor of a combination vehicle (i.e., a towing vehicle and at least one trailer) includes sensing a condition indicative of air volume at trailer wheel ends, estimating an air volume for the trailer wheel ends, generating a predicted brake torque factor for the trailer(s) with a trained machine learning model utilizing the estimated air volume, and reconfiguring an electronic control unit of the combination vehicle with the predicted brake torque factor. A corresponding system for handling brake factor of a combination vehicle includes one or more sensors, a processing module, and a control module. The processing module estimates an air volume for trailer wheel ends, and generates a predicted brake torque factor for the trailer(s) with a trained machine learning model. The control module is arranged to reconfigure an ECU of the combination vehicle with the predicted brake torque factor.

The application provides a calibration device of an impact wrench, which comprises a bottom plate, a torque sensor, a support column, a top plate and a bolt simulator; the torque sensor is installed on the bottom plate; a bearing hole in the middle of the top plate is embedded with a ball bearing; the bolt simulator comprises a nut seat, a gasket chamber, a lower gasket, a butterfly spring, an upper gasket, a force sensor seat, a first pressure sensor and a bolt; the torque sensor is installed below the bolt simulator, directly measuring the torque of the locking bolt of the impact wrench; the impact wrench is directly connected with the bolt, and the transmission of the energy of the impact wrench is not affected; the ball bearing is installed in the middle of the top plate; before the bolt is locked, the bolt head is in contact with the end face of the inner ring of the ball bearing; the rolling friction of the ball bearing has little loss on the torque, thereby improving the accuracy of the determination of the locking torque. The calibration device can directly measure the torque T and the locking force F of the locking of the impact wrench on the bolt, and accurately obtain the torque coefficient K of the impact wrench.

The application discloses a kind of single-sided installation fastener torsion and measurement method of friction coefficient, not only can accurately measure the tightening torque T of single-sided installation threaded fastener in whole installation process, pre-tightening force F, threaded friction torque Tt, torsion angle and rotation speed etc., and can be obtained according to the relevant formula of torsion and tension relationship of threaded fastening torque coefficient K, threaded friction coefficient μ t , friction torque T of rotating support surface b (T b =T-T t ), support surface friction coefficient μ b And other parameters, simultaneously also solve the disassembly problem after installation is completed.

The invention provides a vehicle control method and device and a vehicle. The vehicle control method comprises the steps that whether a first wheel is in a convex road condition or not is determined; under the condition that the first wheel is in the convex road condition, a first electric drive torque coefficient is determined based on the real-time distance of the first wheel away from the convex road condition, so that the first electric drive torque coefficient is obtained in the process that the first wheel is away from the convex road condition by a target distance; the whole vehicle demand torque output by the second driving motor is dynamically transferred to the first driving motor through the first electric driving torque coefficient; wherein the target distance is determined based on the wheelbase of the vehicle and the driving distance of the first wheel on the convex road condition; and a second electric drive torque coefficient is determined based on the driving duration of the second wheel away from the convex road condition, so that the whole vehicle demand torque output by the first driving motor is dynamically transferred to the second driving motor through the second electric drive torque coefficient. In this way, rotating speed sudden change caused by wheel flying can be reduced, vehicle body shaking is reduced, and riding comfort is improved.

The application relates to a planar motor thermal loss homogenization decoupling distribution method and system, belongs to the field of magnetic suspension motor motion control technology, and aims to solve the problem of local thermal loss concentration, thermal expansion deformation and even thermal damage of an overdrive planar motor caused by uneven coil current distribution. The application comprises the following steps: obtaining a reference torque instruction of a current control period and an electromagnetic force and torque coefficient matrix corresponding to a current pose of a motor runner; performing an iterative peak value contraction process according to the reference torque instruction and the electromagnetic force and torque coefficient matrix; in each iteration, first, a nonlinear peak value contraction is performed on a coil current vector according to a current contraction threshold value, and then a new round of coil current vector is obtained through decoupling compensation updating; whether an iteration termination condition is reached is judged, and if yes, the current coil current vector is output as a current decoupling instruction to the planar motor. The application provides a matching system.

This invention discloses a method for monitoring the comprehensive performance of ships, including: a speed performance monitoring process and a cost-effectiveness monitoring process. The speed performance monitoring process includes: constructing the ship's total resistance, torque coefficient, and thrust coefficient using three sets of polynomials containing unknowns to be identified; dividing the value ranges of the three sets of unknowns into several value intervals; using an improved genetic algorithm, finding the optimal solution in each value interval of the unknowns, and taking the smallest optimal solution as the final solution; calculating the ship's real-time parameters in the ship's mathematical model based on the values ​​of the three sets of unknowns corresponding to the final solution, thus completing the ship's speed performance monitoring; the cost-effectiveness monitoring process includes: calculating cost-effectiveness based on the degree of change in naval coefficients, the degree of change in monitoring system functional indicators, and the cost of the monitoring system. This invention can better obtain ship speed performance indicators and more accurately and dynamically obtain cost-effectiveness.

The invention discloses a control method and system of a knee joint power-assisted exoskeleton, and belongs to the technical field of exoskeletons. The control method comprises an uphill mode and a downhill mode. In the uphill mode, thigh angular velocity, joint angle and joint angular velocity data are detected in real time, whether the current single-leg gait is converted into a supporting phase from a swinging phase or not is judged according to the detected data, and a control end angle and a control torque coefficient on a conversion node are recorded; calculating a motor output torque based on the current joint angle and the minimum value of the output torque; in the downhill mode, joint angle and joint angular velocity data are detected in real time, whether the knee joint of the current single leg is bent in an accelerated mode or not is judged according to the detected data, and if yes, the motor output torque is determined according to the joint angular velocity and a preset damping coefficient. Self-adaptive assistance can be achieved only through thigh angular velocity and joint angle data, assistance output is smooth, response is timely, and the self-adaptive assistance device can adapt to gait characteristics and uphill and downhill working condition changes of different wearers.

The invention discloses an immersive robot teleoperation master-slave system and method based on bidirectional force sense mapping. The system comprises a master hand controller and a slave end robot, wherein master-slave position-force bidirectional closed-loop control is established through a wireless communication mode; the master hand controller sends a mechanical arm target pose instruction, an execution tail end closing / releasing instruction and a control signal of the mobile platform to the slave end robot to form a forward control channel; the control panel obtains feedback torque based on the current I fed back by the slave end robot and a preset torque coefficient Kt, and the feedback torque serves as force sense feedback of the slave end; the control panel sends a torque resisting instruction to the feedback motor according to the feedback torque, the feedback driving motor rotates according to the torque resisting instruction, the feedback transmission mechanism is driven to act, and a reverse feedback channel is formed. According to the invention, the action of the operator can be accurately mapped to the slave end robot, and the force generated by interaction between the slave end robot and the environment can be truly fed back to the operator in a low-delay manner.

The application relates to a control method, system and device for self-adapting pedal torque and a vehicle, the method comprising the following steps: calculating a pedal coefficient according to a pedal opening degree, and mode switching of a Pedal Map in multiple modes established in advance according to the pedal coefficient; determining a torque coefficient from the selected Pedal Map according to the pedal opening degree and a motor rotating speed; correcting the torque coefficient according to a battery temperature, a battery state of charge and a battery state of health to obtain a battery corrected torque coefficient; correcting the battery corrected torque coefficient according to a motor temperature to obtain a motor-battery corrected torque coefficient; and self-adapting the pedal torque according to the motor-battery corrected torque coefficient. The application adjusts the torque coefficient through key information such as the pedal opening degree, the SOC, the SOH, the battery temperature and the motor temperature, self-adapts the whole vehicle torque output, realizes protection of high-voltage parts such as the battery and the motor, and matches the pedal feeling with the actual power output.

The invention discloses a vehicle torque control method and device, a vehicle and a medium, the vehicle torque control method and device are applied to a vehicle torque control system, the vehicle torque control system is arranged in the vehicle, and the method comprises the steps that vehicle driving parameters and a basic torque coefficient issued by a cloud end are obtained, and determining a steady-state torque coefficient, a transient torque coefficient and driving control demand information according to the vehicle driving parameters, selecting the steady-state torque coefficient or the transient torque coefficient according to the driving control demand information to adjust the basic torque coefficient to obtain a target torque coefficient, and controlling the vehicle torque by adopting the target torque coefficient. According to the method, the basic torque coefficient issued by the cloud can be dynamically adjusted based on the vehicle driving parameters, the target torque coefficient is obtained, vehicle torque control is carried out on the basis of the target torque coefficient, the self-adaptive intelligent level of torque control is improved, and the response speed of vehicle control and the user experience are guaranteed.

Vehicles and associated systems and procedures are designed for dynamic and adaptive coefficient estimation. One procedure involves capturing a steady state and dynamically determining an axle torque reference value and an associated vehicle speed reference value based on measurement data during the steady state.After reaching steady state, the procedure determines an updated axle torque reference value using the axle torque reference value and a stored axle torque reference value, determines an updated vehicle speed reference value using the vehicle speed reference value and a stored vehicle speed reference value, determines estimated values ​​for one or more nominal axle torque coefficients based on at least one relationship between the updated axle torque reference value and the updated vehicle speed reference value, and determines a torque command to operate the vehicle using the estimated nominal axle torque coefficient values.

The application provides a vehicle feedback torque determination method and device, the method comprising: obtaining vehicle parameter information of a vehicle, the vehicle parameter information comprising steering wheel torque; obtaining a target road condition corresponding to the vehicle parameter information according to the vehicle parameter information and a road condition prediction model; obtaining a feedback torque coefficient corresponding to the target road condition; and determining vehicle feedback torque according to the steering wheel torque and the feedback torque coefficient. The method of the application obtains a target road condition, and obtains a feedback torque coefficient corresponding to the target road condition, and then obtains vehicle feedback torque according to the feedback torque coefficient corresponding to the target road condition. The vehicle feedback torque obtained in this way is the vehicle feedback torque corresponding to the target road condition, and based on the vehicle feedback torque, road feeling information matching the actual road condition can be provided for the driver.

The application discloses a kind of based on tunneling state regulation method of shield data, the method includes the following steps: collecting shield starts tunneling thrust growth section data and processing, obtains tunneling thrust, tunneling torque, resistance thrust and resistance torque;Contrast the last ring or test section shield resistance thrust recommended value, evaluate stratum stability and regulate soil bin pressure;When shield normally tunnels, real-time processing shield tunneling data, obtain shield tunneling state index real-time value of shield penetration index, cutterhead torque coefficient and screw machine torque coefficient, perfect shield tunneling database, and real-time analyze shield tunneling state, monitor and judge tool wear, construction risk such as mud cake, simultaneously adopt muck improvement real-time regulation shield tunneling state.