345 results about "Tachometer" patented technology

The invention relates to the technical field of industrial automation control, and particularly discloses a rotating speed detection and closed-loop control system based on photoelectric sensing and a PLC, and the system comprises at least one rotating body which is a rotating speed controlled object, and the surface of the rotating body is provided with a configurable number of reflection mark areas or speed measurement holes; the proximity photoelectric switches are in one-to-one correspondence with the rotating bodies, are aligned with the reflection mark areas or the speed measurement holes, and are used for detecting rotation information of the rotating bodies and generating original pulse signals; a high-speed counter input port of the PLC is electrically connected with signal output ends of the proximity photoelectric switches, and a pulse preprocessing module, a rotating speed calculation module, a deviation processing module, a control algorithm module and a signal adaptation module are arranged in the PLC. The PLC and the proximity photoelectric switch which are widely applied in the industrial field and high in popularity rate are adopted as core technical components, and expensive special servo controllers, encoders and other devices are not needed, so that the hardware purchase cost of the system is greatly reduced.

The invention relates to the field of aero-engine testing, in particular to an aero-engine rotating speed signal generator and a control method, and the system comprises the steps that a main control module receives a test demand input by a user, selects and determines the model, matching frequency, voltage and phase parameters of a tachometer sensor needing to be simulated based on the test demand, and transmits the parameters to a DSP processor; the DSP processor receives parameters issued by the main control module and generates an SPWM signal through a timer; the timer is configured to be in a circulation mode, and the period of the PWM signal is changed by changing the initial value of the timer; the inversion module converts the isolated SPWM waveform into a three-phase alternating current signal and outputs the three-phase alternating current signal; and the detection module measures data of the three-phase alternating current signal output by the inversion module in real time and feeds back the data to the main control module to form closed-loop control. Test errors caused by performance errors of the sensor are avoided, and the actual performance of the tachometer indicator can be evaluated more accurately.

The invention relates to the technical field of tire detection, in particular to a method for identifying abnormal vibration of a tire through color difference of an automobile tire tread, which comprises the following steps: generating a point cloud picture; generating a first tire surface height point cloud picture at the first rotating speed; generating a first visual point cloud picture and determining an abnormal vibration level; dividing detection intervals, wherein n detection point sets are configured in each detection interval; generating a second tire surface height point cloud picture at a second rotating speed; reducing the rotating speed of the tire at a preset rate, calculating a stability score, and judging whether the stability of the detection device meets requirements or not; and in response to the satisfaction, rendering the tire surface to generate a second visual point cloud picture, and determining an abnormal vibration level. According to the method, the height difference of the tire surface height at each detection point position is calculated, and the tire surface is rendered according to the height difference and the preset color matching mechanism, so that the vibration condition caused by the tire surface height can be intuitively and visually displayed.

In a hydraulic drive system used for an electrically driven hydraulic work machine that drives a hydraulic pump by an electric motor and supplies a hydraulic fluid to plural actuators to carry out work, the power consumption of the hydraulic pump is kept from exceeding a value decided in advance. For this purpose, a controller calculates target power to be consumed by the hydraulic pump on the basis of the capacity of the hydraulic pump, the delivery pressure of the hydraulic pump sensed by a pressure sensor, and a target revolution speed of the electric motor, and limits the target revolution speed of the electric motor in such a manner that the target power falls within a range of the maximum allowable power.

The invention provides a vehicle drifting control method, device and equipment, a computer readable storage medium and a computer program product. The method comprises the steps that based on target state information and actual state information of a vehicle, a first slip rate component and a second slip rate component are obtained, the first slip rate component is used for slip angle stability control, and the second slip rate component is used for yaw velocity control; determining a left rear wheel slip rate target and a right rear wheel slip rate target based on a basic slip rate target, the first slip rate component and the second slip rate component; and rotating speed calculation is conducted based on the actual state information, the left rear wheel slip rate target and the right rear wheel slip rate target, and the vehicle is controlled based on the obtained left rear wheel rotating speed target and the obtained right rear wheel rotating speed target. According to the invention, a driver can maintain stable drifting of the vehicle only by operating the steering wheel and the accelerator.

The invention belongs to the technical field of mixing equipment, and particularly relates to a non-intrusive homogenizer operation process abnormity monitoring method and system, and the method comprises the steps: calculating the mechanical angular acceleration according to the real-time rotating speed of a motor shaft end; on the basis of a pre-constructed inverse dynamic model, according to the motor orthogonal axis current, the motor shaft end real-time rotating speed and the mechanical angular acceleration, a rheological resistance characteristic index is calculated; processing the rheological resistance characteristic index by using a singular spectrum analysis algorithm, and extracting a trend line of the rheological resistance characteristic index through construction of a trajectory matrix, singular value decomposition and diagonal averaging operation; the information entropy of the first-order difference sequence of the trend line is calculated to serve as the mixing stability entropy, and the mixing end point of the operation process of the homogenizer is judged according to the convergence condition of the mixing stability entropy relative to the reference entropy, so that anomaly monitoring of the operation process of the non-intrusive homogenizer is achieved. According to the invention, abnormity monitoring and end point determination of the mixing process of the homogenizer are realized.

The invention discloses a coal-fired power plant belt conveyor driving gear box bearing fault diagnosis method, which relates to the field of fault diagnosis and evaluation, and is used for extracting gear box bearing fault features based on an order tracking analysis method of tachometer-free instantaneous rotation frequency estimation. The method specifically comprises the following steps: S1, obtaining an instantaneous rotation frequency ridge line through the time frequency distribution of a vibration signal, carrying out the rotation frequency estimation of a rotating shaft, and improving the precision of the instantaneous rotation frequency ridge line through an improved multi-source ridge line fusion algorithm; and S2, extracting bearing fault feature order information by using a calculation order tracking COT algorithm, and adaptively processing a bearing fault diagnosis problem of the driving gearbox of the belt conveyor. According to the bearing fault diagnosis method for the rubber belt conveyor driving gearbox of the coal-fired power plant, the bearing inner ring fault is successfully diagnosed, and the feasibility of a bearing fault diagnosis strategy for the rubber belt conveyor driving gearbox is verified.

The invention provides a self-adaptive control method and system for an extrusion screw of a plastic extruder, and relates to the technical field of plastic recovery and regeneration, and the method comprises the following steps: collecting operation data of the plastic extruder; calculating a change trend and an effective value according to the machine head melt pressure; a three-level partition model is constructed, a pressure deviation value is calculated based on the effective value and the target reference value, and a pressure control area is generated according to a comparison result of the pressure deviation value and a pressure threshold value; performing consistency judgment on the change trend and the pressure demand direction to generate an adjustment coefficient, and performing step length correction by combining a pressure control region and a motor load current to generate a rotating speed adjustment amount; the to-be-executed rotating speed of the screw is calculated in combination with the real-time rotating speed of the screw, acceleration limiting processing is carried out to generate the target rotating speed of the screw, and the target rotating speed is coded into a control instruction to be sent to the driving unit, so that the self-adaptive control effect of the extrusion screw can be achieved, and false pressure fluctuation caused by material hardness change is effectively prevented; the extrusion stability and the response speed are obviously improved.

The invention relates to the technical field of design optimization, in particular to a control design optimization method and system for a permanent magnet synchronous motor. The method comprises the following steps: obtaining and measuring a stator three-phase voltage value and a current value of the PMSM and a motor rotating speed in real time; constructing a d-q axis motor equivalent circuit model, and calculating an available boundary curve of the voltage of the weakening area by combining the three-phase voltage value of the stator and the rotating speed of the motor; determining a dynamic safety margin coefficient of a weakening area voltage-current working area based on the weakening area voltage available boundary curve; judging the motor rotating speed of the permanent magnet synchronous motor; by introducing voltage-current working area modeling and a dynamic safety margin coefficient, accurate current control and adaptive inverter compensation of the PMSM in a weak magnetic area are realized, and the problems of poor stability, insufficient voltage margin and incomplete compensation in traditional high-speed control are solved.

The invention belongs to the field of aero-engine test and fault diagnosis, relates to an engine rotating part fault positioning technology, and provides a rotating part fault feature recognition method and system in a tachometer-free scene, and the method comprises the steps: obtaining a vibration signal and a theoretical fault feature order of a rotating part; obtaining an instantaneous rotating frequency signal of the rotating part through the constructed non-convex linear transformation regular term sparse representation model; carrying out iterative solution through the constructed sparse representation model to obtain a fault characteristic signal of the rotating part; obtaining an order envelope spectrum according to the instantaneous frequency conversion signal and the fault characteristic signal; and performing health assessment and fault identification on the rotating part according to the order envelope spectrum and the theoretical fault feature order. The method can solve the problem that the variable-speed fault of the rotating shaft part of the aero-engine cannot be recognized in a non-rotating-speed scene. Through the implementation of the method, the fault of the rotating shaft part of the aero-engine is effectively identified, and technical support is provided for troubleshooting in an aero-engine test.

The invention relates to the technical field of vehicle operation management, in particular to an anti-slip method, system and device for vehicle hill starting and a medium. The method comprises the steps that the rotating speed value and gear signals of an output shaft of a vehicle are continuously monitored; calculating an output shaft rotating speed real-time change rate based on the output shaft rotating speed; continuously judging whether the current vehicle running state meets a predefined slope starting working condition identification condition or not based on the gear signal of the current period, the rotating speed of the output shaft and the real-time change rate of the rotating speed of the output shaft, executing anti-slope-sliding operation after meeting the predefined slope starting working condition identification condition, and continuously judging whether the current vehicle running state meets a predefined anti-slope-sliding function exit condition or not; and after meeting, quitting the anti-slip operation, and circularly executing. By continuously monitoring and filtering the rotating speed and the gear signal of the output shaft of the vehicle, the hill starting working condition can be accurately identified and the anti-slip control can be executed without additional hardware, so that the system cost is effectively reduced and the function false triggering is avoided.

The invention relates to a rotary machine composite fault detection method and system under a time-varying working condition, and belongs to the technical field of rotary machine fault diagnosis. The method comprises the steps of collecting a non-stationary vibration signal under a variable speed working condition, fusing a third-order Renyi entropy and kinematics prior to construct an adaptive time-frequency enhancement model, and outputting weighted time-frequency distribution; global optimization is carried out through a priori constraint Viterbi algorithm, and an instantaneous frequency ridge line is extracted under the condition of no rotating speed sensor; performing angular domain resampling by taking the ridge line as a phase reference, and converting a non-stationary signal into an angular domain stationary signal; constructing an extended difference mode decomposition convex optimization model, and iteratively solving an optimal difference spectrum; and determining a frequency spectrum segmentation threshold value based on self-adaptive change point analysis, performing decoupling separation and time domain reconstruction on the optimal difference spectrum, and completing composite fault diagnosis through feature comparison. The method does not need an external tachometer, can adaptively extract and separate the composite fault features under the variable speed working condition, is high in diagnosis accuracy, and is good in engineering application value.

The invention relates to the technical field of fan control, and discloses a fan rotating speed adjusting method and system based on a dynamic pollution load. The method comprises the following steps: collecting a target PM2.5 concentration, a target VOC concentration and a target microorganism concentration of each monitoring point, and calculating a comprehensive pollution load index of each monitoring point; traversing boundary critical points in all the monitoring points based on the comprehensive pollution load index and generating a boundary identification vector; the real-time pressure drop of the air inlet side and the air outlet side of the filter element in each fan is collected, and the pressure difference compensation gain is calculated; calculating a target reference rotating speed for all monitoring points in the responsible sector of each fan; and calculating the average pollution load index of the responsible sector of each fan, executing fuzzy reasoning to obtain a rotating speed increment, and generating a PWM duty ratio according to the target reference rotating speed and the rotating speed increment to drive each fan. The technical problems of space pollution response lag and energy consumption imbalance are solved, and the performance of the air purification system is improved.

The invention relates to a dual-motor hill-holding control method and device and a vehicle control system, when a vehicle is in a slope sliding state, a first motor is controlled to be adjusted from the current rotating speed to zero rotating speed, and a target output torque is calculated according to the current motor rotating speed; the sum of the output torque of the first motor and the output torque of the second motor is controlled to be equal to the target output torque, so that the vehicle is stressed in a balanced mode to maintain the slope holding state, one motor conducts rotating speed loop control, and the other motor compensates the remaining needed torque according to the torque output by the motor conducting rotating speed loop control; and through division of labor of speed control and torque control, a dynamic game generated when speed rings of the double motors are controlled at the same time is eliminated, it is ensured that the hill-holding function is stable, and therefore cooperative hill-holding control over the double motors is achieved. The method does not need to depend on high-cost hardware such as an ESP or an EPB, and only needs software logic of a motor controller to achieve slope holding.

The invention relates to a fan field dynamic balancing device which comprises a motor, a coupler, a left bearing seat, a rotor shaft, an impeller, a right bearing seat, a swivel joint, a swivel joint oil inlet pipe, an oil tank, a left vibration sensor, a vibration analyzer, a right vibration sensor and a tachometer. The motor drives the rotor shaft and the impeller to rotate at a rated rotating speed through the coupler, the left bearing seat and the right bearing seat are provided with a left vibration sensor and a right vibration sensor respectively, the left bearing seat and the right bearing seat are used for fixing the rotor, and the vibration condition of the rotor is extracted through the vibration sensors installed on the bearing seats. Vibration signals extracted by the vibration sensor are transmitted to the vibration analyzer through a wire, the multi-oil-way swivel joint is additionally arranged at the free side shaft end of the fan, and by controlling opening of each oil way of the swivel joint, adding of counter weights of each impeller, namely different angles, is achieved.

The invention relates to the field of mower control systems, and discloses a gasoline mower cutter soft start control system which comprises an engine, a spark plug, a cutter and an electromagnetic clutch coil which are arranged in a mower shell. The input signal acquisition module, the level conversion and shaping circuit, the single chip microcomputer and the power driving execution module are electrically connected with the spark plug. The single chip microcomputer comprises a rotating speed calculation unit and a core control unit, the rotating speed calculation unit is used for calculating the rotating speed of an engine according to digital pulses output by the level conversion and shaping circuit, and the core control unit selects a soft start control parameter set according to the rotating speed of the engine and outputs a multi-stage PWM control signal to the power driving execution module; the working current of the electromagnetic clutch coil is adjusted by the power driving execution module in stages, soft starting of the cutting knife from a static state to a working rotating speed is achieved, and mechanical impact and vibration in the starting process are reduced.

The application discloses a power following compensation correction control method for a range extended electric vehicle, and steps are as follows: S1, power correction: initial demand power generation is calculated, and final power generation is obtained by correction according to current atmospheric pressure, SOC and load compensation; S2, speed correction: first correction power generation speed and power generation torque between maximum and minimum values are calculated, second correction power generation speed and simulation speed are calculated and accumulated, and final power generation speed is obtained together with preset maximum power generation speed; S3, torque correction: initial power generation torque is calculated according to final power generation and final power generation speed, feedforward correction torque is calculated according to feedforward compensation control, and finally, final power generation torque is obtained. The application also discloses a power following compensation correction control device and a computer system for the range extended electric vehicle. The application can ensure good driving following property under the premise of optimal fuel consumption and NVH performance, and can be widely applied in the field of the range extended electric vehicle.

The invention provides a motor control method and device of an air compressor, a vehicle and a storage medium, and the method is applied to the field of vehicles. The method comprises the steps that the current temperature of a motor is calculated based on the obtained direct-current voltage value of an air compressor controller at the target moment, the obtained water temperature value of a cooling water inlet of the air compressor controller, the obtained alternating current of the motor and the obtained rotating speed of the motor; and if the current temperature is greater than the allowable temperature of the motor, acquiring the current operation condition of the motor, and controlling the motor to operate in a power-reducing manner or stop operating according to a preset power-reducing strategy according to the current operation condition. According to the method, installation of a temperature sensor and lead-out wire harnesses and connectors is omitted, the temperature of the motor is calculated, a calculation result is transmitted to an FCU through a communication bus, and meanwhile a corresponding protection mechanism is executed according to a comparison result of the current temperature of the motor and the allowable temperature of the motor.

This invention relates to the field of textile machinery control technology, specifically to a control method for increasing the capacity of the sliver can in a carding machine coiler; S1. Set initial parameters; S2. Generate the tachometer of the chassis rotary motor; S3. Generate the pulse count table of the chassis traverse motor; S4. Position the initial position; S5. Perform one traverse: sequentially obtain the corresponding chassis rotary motor speed from the chassis rotary motor speed table, and control the sliver can to rotate approximately one revolution; simultaneously, sequentially obtain the corresponding chassis traverse motor pulse count from the chassis traverse motor pulse count table, and control the chassis traverse motor to run once; S6. After this traverse, repeat S5 until N-1 traverses are completed; S7. Execute S4 to enter the next cycle, until the carding machine stops. Using this method, the sliver can coil feed is increased, achieving a better capacity increase effect.

The invention belongs to the technical field of connectors, and provides a motor turn-to-turn short circuit fault diagnosis method, device and system, and the diagnosis method comprises the following steps: (1) collecting a current signal of a stator and the rotating speed of a rotor; (2) processing the current signal to filter out a fundamental frequency, and performing fast Fourier transform to obtain an actually measured frequency spectrum; (3) calculating a slip ratio according to the rotating speed, and determining a turn-to-turn short circuit fault characteristic frequency and a modulation frequency generated by load fluctuation; and (4) combining the actually measured frequency spectrum, the short-circuit fault characteristic frequency and the modulation frequency to diagnose the short-circuit fault state of the motor. According to the method, the load modulation frequency and the turn-to-turn short circuit fault characteristic frequency in a healthy state can be accurately separated, and the accuracy and reliability of asynchronous motor turn-to-turn short circuit fault diagnosis under the variable load condition are remarkably improved.

The utility model discloses a tachometer calibration clamping mechanism, which relates to the tachometer calibration clamping field, and comprises a calibration installation shell, a calibration driving assembly arranged in the calibration installation shell, a calibration clamping assembly arranged on one side of the calibration driving assembly, a clamping driving assembly arranged on one side of the calibration clamping assembly, and a calibration clamping assembly arranged on the other side of the calibration clamping assembly. According to the automobile tachometer calibrating device, the prior art is improved, in actual use, clamping force can be kept in a self-adaptive mode through the calibration clamping assembly, and the problems that in the using process of an existing automobile tachometer calibrating device, a tachometer is fixed at a time, automatic re-clamping cannot be achieved after clamping is loosened, and clamping force cannot be adjusted are solved. The problem that the tachometer is easy to shake in the calibration process due to the fact that the tachometer is damaged, the accuracy of the measurement result is affected, and the practicability of the device is reduced is solved.

The embodiment of the application relates to the technical field of intelligent control, and relates to a deviation correction control method and device of a tower crane frequency converter, a computing device and a storage medium. The method specifically scheme is: obtaining encoder data generated by a tower crane motor when the tower crane motor operates at a set frequency; calculating an actual motor speed according to the encoder data, and calculating a deviation coefficient according to the actual motor speed and a rated motor speed; and performing deviation correction control on the frequency of the frequency converter according to the deviation coefficient. The embodiment of the application can dynamically obtain physical parameters of the tower crane, calculate a deviation coefficient according to the physical parameters, correct the frequency deviation of the frequency converter by using the deviation coefficient, and thus precisely control the operation of the tower crane, and ensure the accuracy of automatic operation of the tower crane.

This invention discloses a hardware and software matching method for a synchronization system, comprising the following steps: 1) learning the position of the shift fork synchronization point, the synchronizer slider force, and the synchronization capacity of the synchronization system during self-learning; 2) calculating the required speed difference to be synchronized based on the collected input and output shaft speeds when shifting gears is required; 3) calculating the required shifting force based on the speed difference, the required synchronization time, and the synchronization capacity of the self-learned synchronization system; 4) when the calculated required shifting force is less than the slider force of the target gear synchronizer, only the target gear synchronizer is activated; when the calculated required shifting force is greater than or equal to the slider force of the target gear synchronizer, multiple synchronizers are activated together to eliminate the speed difference. This invention has the advantages of simple structure, more compact layout, and the ability to eliminate speed differences.

The application discloses a BLDC motor rotating speed calculation method based on FPGA, and belongs to the field of motor control technology and FPGA digital system design, and comprises the following steps: collecting three-way Hall signals in a BLDC motor and pre-processing the three-way Hall signals to obtain pre-processed three-way Hall signals; judging whether the pre-processed three-way Hall signals have static faults and line sequence faults; judging the rotating state of the BLDC motor, including forward rotation, reverse rotation and stop; fusing the pre-processed three-way Hall signals to obtain one-way low-frequency signals; performing sliding frequency counting on high-frequency signals and low-frequency signals to obtain high-frequency accumulated values and low-frequency counting values respectively; wherein the high-frequency signals are system clock frequency signals; and calculating the rotating speed of the BLDC motor according to the high-frequency accumulated values and the low-frequency counting values. The application can simultaneously adapt to high-speed and low-speed use scenarios, can simultaneously control multiple motors to realize rotating speed calculation, and has strong real-time performance, high calculation precision and high reliability.

The embodiment of the invention discloses a fan rotating speed control method, device and equipment and a storage medium. Initial fan rotating speed, first environment parameters, experiment fitting parameters and fan real-time operation duration are obtained, and compensation fan rotating speed is calculated based on the first environment parameters, the initial fan rotating speed and the experiment fitting parameters; under the condition that the real-time operation duration of the draught fan is within the first preset duration stage, the rotating speed of the draught fan is adjusted to the compensation draught fan rotating speed from the initial draught fan rotating speed; and under the condition that the real-time operation duration of the fan is within a second preset duration stage, a second environment parameter is obtained in real time, the normal fan rotating speed is calculated based on the second environment parameter, the initial fan rotating speed and the compensation fan rotating speed, and the fan rotating speed is adjusted to the normal fan rotating speed from the compensation fan rotating speed. The second preset duration stage is after the first preset duration stage. The requirement of the unit for the high wind speed in the refrigeration mode can be fully met, and accurate matching of system energy efficiency is achieved.

The present application relates to an engine line spectrum noise estimation method and a vehicle active noise reduction control method, which includes: calculating the main order frequency of the engine line spectrum noise according to the real-time speed of the engine; obtaining the primary noise through the internal model control framework, and performing spectrum estimation on the primary noise through the frequency estimation algorithm to obtain the main order frequency and harmonic frequency of the engine line spectrum noise; using a pre-trained neural network model as an engine frequency prediction model, combined with engine operation data as input, and outputting the predicted main order frequency and harmonic frequency of the engine line spectrum noise in real time; performing a comprehensive analysis on the above frequency prediction data to generate the final order frequency corresponding to the engine line spectrum noise. The present application combines the comprehensive output results of different estimation schemes to generate an order frequency that is closer to the actual noise, reduce the impact of frequency imbalance on engine noise control, thereby achieving a better order noise control effect and providing users with a better noise reduction experience.

The utility model discloses a comprehensive testing device for an airplane tachometer. The comprehensive testing device comprises a host, a driving device, a rotating speed indicator and a rotating speed sensor, a communication module is arranged in the host; the host and the driving device carry out RS-232 communication through the communication module; the host is in RS-422 communication with the rotating speed indicator and the rotating speed sensor through the communication module; the driving device is provided with a linkage shaft, and the driving device is connected with the rotating speed sensor through the linkage shaft. According to the utility model, the DDS principle is adopted to output rotating speed signals, the precision is high, and the readability is good; and the servo motor with high rotating speed precision and the controller are adopted, so that the output rotating speed signal is stable and reliable. A DDS rotating speed circuit in the detection control module mainly adopts a DDS technology to generate sine wave signals of any frequency, the DDS rotating speed circuit is mainly composed of an AD9833, the DDS rotating speed circuit generates three paths of sine wave signals, the sine wave signals are amplified by a post-stage amplification circuit and output to a tachometer indicator, and the circuit simulates rotating speed signals of a rotating speed sensor.

The invention discloses a braking energy recovery control method for an electric vehicle. The method comprises the following specific steps: 1, acquiring an accelerator, a brake pedal, a parking signal, a vehicle speed signal and a battery load value; 2, starting a braking energy feedback mode; 3, the current vehicle speed value is obtained, and the braking torque is obtained; 4, the current state of the power battery is obtained, and the limit braking torque of the power battery is calculated; 5, the current rotating speed of the driving motor is obtained, and the limiting braking torque of the driving motor is calculated; 6, obtaining the maximum feedback torque limit value of the driving motor; 7, comparing the braking torque, the power battery limit value braking torque, the driving motor limit value braking torque and the driving motor maximum feedback torque limit value to obtain a minimum value Tmin; 8, acquiring a feedback torque value Trq of the drive-by-wire ACBS; step 9, comparing the minimum value Tmin and the torque value Trq, and taking the maximum value T as the final feedback torque; and tenthly, electron rotation is controlled to conduct energy recovery according to the final braking target torque.

The invention provides a method for estimating the operating temperature (of the rotor of a permanent-magnet synchronous electric machine consisting in E3) in a phase of use during which no torque is requested: E31) determining an internal control voltage and measuring the speed of rotation of the rotor; E32) calculating a corrected value of the internal control voltage equal to the quotient of said voltage and a correction factor (expressing a ratio between an induced voltage measured at the end of manufacture and an induced voltage of a reference machine); and E33) estimating a value of the operating temperature of the rotor that is obtained, using a model, for the measured speed of rotation and the corrected value of the internal control voltage.

The utility model discloses a train operation scene test platform based on an unmanned driving mode, and relates to the technical field of train data simulation. Comprising a temperature detection simulation module which is composed of an integrated circuit temperature sensor, a diode and a first addition arithmetic unit and is used for detecting the surface temperature of the train diesel engine through communication of the sensor and the diode; the train running speed simulation module comprises a tachometer conversion board and a second addition arithmetic unit, and the voltage signal output by the industrial personal computer is adapted to the display equipment through the conversion board to simulate the train running speed; the disturbance signal simulation module comprises a random number generator chip and an operational amplifier and is used for simulating interference signals in the train running process and inputting the interference signals to the temperature and speed module; and the monitoring display module is composed of a microcontroller and train data display equipment, receives and displays the analog data and provides monitoring of the running state of the train. The platform can accurately simulate key parameters in the operation process of the unmanned train.