117 results about "Operating speed" patented technology

The shutdown of a compressor (10) installed in a refrigerant circuit (2) in air conditioning or refrigeration system is controlled so as to prevent unpowered reverse rotation of the compressor. Prior to terminating electric power to the compressor drive motor (24), the pressure within the system is relieved and substantially equalized across the compressor, thereby eliminating the possibility of unpowered reverse rotation of the compressor at shutdown. Pressure relief and equalization may be achieved by reducing the operating speed of the compressor to a low forward speed for a period of time prior to deenergizing the compressor drive motor. Pressure equalization may also be achieved by driving the compressor in reverse rotation prior to deenergizing the drive motor.

The invention discloses a paver starting vibration system and a control method, and relates to the technical field of road construction machinery, the control method comprises the following steps: starting a starting stage automatic adjustment mode, setting initial operation parameters, and collecting an actual rotation speed in real time; based on the actual rotating speed, establishing a linear proportional control relation for the running speed, and dynamically adjusting the running speed; and the dynamic adjustment process is continuously carried out, and when specific conditions are met, the mode is automatically switched to the normal mode. The intelligent control that the paving speed is restrained by the vibrating rotating speed is achieved, and the technical problems that in the asphalt paving starting stage, due to the fact that the resistance of the vibrating beam is increased, the actual rotating speed is insufficient, and due to the fact that the vibrating rotating speed is not matched with the paving speed, the pavement compactness is poor, and the flatness is low are solved.

The invention belongs to the technical field of vehicle emission control, and particularly relates to a highway low-carbon route design method and device based on ecological speed control and a medium. The method comprises the following steps: collecting plateau road vehicle operation and CO2 emission data through a real vehicle test; a road section CO2 accumulated emission prediction model based on a DistilBERT framework is constructed; identifying a speed square difference as a key influence factor by using Sobol sensitivity analysis; adopting Bayesian optimization to formulate ecological speed control strategies of different working conditions, and setting a speed square difference critical value; and finally, the strategy is applied to identify and optimize the high-emission linear unit in a route design stage, and the running speed coordination is improved. According to the method, the light-weight large model and ecological speed control are deeply fused for the first time, the problems of accurate prediction of vehicle carbon emission and active carbon control at the front end of route design in the plateau complex environment are solved, and the purpose of reducing the carbon emission in the operation period from the road alignment source is achieved.

The application discloses a kind of determination methods, device and equipment of oil pump system, belong to vehicle technical field.Method includes: obtaining the acceptable noise value of each driving position in each vehicle speed and each frequency of first vehicle;Obtain the noise attenuation of each driving position in each frequency;Determine the required noise value of first vehicle to oil pump system in each vehicle speed;Obtain the noise value emitted by reference oil pump system in each speed and each frequency;Determine the required operating speed of first vehicle to oil pump system in each vehicle speed;Based on the minimum operating speed of first vehicle to oil pump system in each vehicle speed is not greater than the required operating speed of first vehicle to oil pump system in each vehicle speed, determine that reference oil pump system is the oil pump system of first vehicle.The method makes the determination mode of oil pump system diversification, higher flexibility, and the matching degree of first vehicle is higher, and the noise of oil pump system is smaller when running, improves the driving comfort.

This invention discloses a method for adjusting the operating speed of a sanitation vehicle based on garbage coverage rate, and a sanitation vehicle itself. The method includes the following steps: acquiring image data within a preset area in front of the vehicle; preprocessing the image data, including dynamic ROI delineation, image enhancement and denoising, and brightness normalization; using a deep learning model based on YOLOv5s to detect garbage in the preprocessed image and outputting target boxes for the coverage area; calculating a two-layer coverage rate based on the target detection results and the Otsu threshold segmentation method, combined with color features, and outputting the current garbage coverage rate; and adjusting the operating speed of the sanitation vehicle according to the garbage coverage rate based on preset rules. This invention can improve the accuracy of road garbage coverage rate identification and significantly optimize vehicle operating energy consumption and operating costs.

This invention discloses a multi-objective optimization method for modifying the rear gear system of an engine using an attention-integrated mechanism, relating to the fields of engine NVH control and transmission system design technology. The method first constructs a multibody dynamics model of the engine's rear gear system, including idle speed, rated power point, and common operating speed conditions. The common operating speed conditions are selected as the global optimization benchmark, and a genetic algorithm is used to obtain the initial modification parameter combination. Then, an attention-integrated mechanism is introduced, dynamically and iteratively adjusting the weight coefficients of each operating condition based on the positive or negative state of the error improvement value, and performing a secondary verification of the initial modification parameters. If the weighted total improvement value after iteration is less than zero, negative screening is performed to eliminate the affected components. Finally, the optimization effect is verified by establishing a "dynamic force-vibration-noise" simulation chain. This invention effectively resolves the physical conflict between idling knocking and high-speed whistling by constructing a nonlinear decision model of "dynamic weight allocation + negative screening of operating conditions," achieving robust improvement in the NVH performance of the engine gear system across the entire operating range.

The present application relates to mountain rail transit technical field, provide a kind of based on multi-information fusion's rack train speed measurement positioning method, device and system, the method is read by the vehicle-mounted reader of setting at train bottom the encoding information of ground pulse width encoding signboard, and it is compared with the line basic data stored, realize train absolute position acquisition, simultaneously receive the count information of magnetic electric type speed sensor at gear and reflected photoelectric sensor at rack, and combine gear motor load state to determine train running state, then calculate train relative running distance and running speed, and the absolute position is fused with relative running distance, finally obtain train real-time positioning information and actual running speed, when error exceeds threshold value, issue warning and recalculate.The present application improves the precision and reliability of train positioning and speed measurement, realizes rack section train continuous, dynamic, accurate operation control, has significant engineering application value.

The application discloses a track multi-source dynamic detection data mileage alignment method and device, and relates to the technical field of track transportation; wherein the method comprises the following steps: removing the broken chain of standard mileage data according to the standard mileage data of standard data, a sampling interval, a starting sampling point mileage and line broken chain account information, so as to obtain standard straight development mileage and broken chain position information; performing mileage integration reset on to-be-calibrated mileage data according to train running speed data, a sampling frequency of the to-be-calibrated data and the starting sampling point mileage, so as to obtain to-be-calibrated straight development mileage; configuring calibration parameters; calibrating the to-be-calibrated straight development mileage in sections according to the calibration parameters, first vehicle body acceleration data, second vehicle body acceleration data and the standard straight development mileage, so as to obtain calibration straight development mileage corresponding to the to-be-calibrated straight development mileage; performing broken chain correction on the calibration straight development mileage according to the broken chain position information, so as to obtain calibration mileage data after mileage alignment of the to-be-calibrated mileage data. The application can improve the accuracy of mileage alignment.

A method for establishing a protection level system of a roadside guardrail of an off-highway tour sightseeing vehicle relates to a public traffic safety technology, establishes a collision energy calculation model based on vehicle actual parameters and limit operation conditions, and divides a protection level accurately matched with vehicle risks so as to effectively improve the operation safety level of the sightseeing vehicle. The method for establishing the protection level system comprises the following steps of: acquiring key technical parameters of a large number of in-use sightseeing vehicles in a target area, at least including rated passenger number, curb mass and maximum running speed; performing statistical analysis on the collected servicing quality data of each vehicle type, and determining a 90th percentage value P90 as representative quality of the vehicle type; establishing a physical model for calculating the collision energy of the sightseeing vehicle, wherein the input parameters comprise the calculation mass, the collision speed and the collision angle; and according to the calculated collision energy range of the main vehicle model, establishing and dividing special off-highway sightseeing vehicle guardrail protection levels T1, T2, T3 and T4.

There is provided method for controlling an electric motor configured to drive a mechanical load, the method being for use in a power tool and comprising: in response to a condition being satisfied, comparing speed of the motor to a speed threshold; and if the motor speed is below the speed threshold, activating a power limitation mode. The power limitation mode comprises: monitoring motor power; adjusting one or more motor control parameters so as to maintain power at or close to a power limit; and in response to a determination that the motor speed exceeds the speed threshold, deactivating the power limitation mode and activating an operating mode in which a reference motor speed for the motor is set to an operating speed.

The invention relates to the technical field of highway operation management, in particular to a highway emergency lane dynamic management method based on ETC data. Comprising the following steps: collecting vehicle ETC label information; analyzing and processing the data through an ETC data processing device, and extracting vehicle operation key parameter information; analyzing the vehicle operation data according to the vehicle operation key parameter information, calculating the average speed of the vehicle between two adjacent gantries, and further analyzing the overall vehicle operation speed; the average speed and the traffic flow of all vehicles in the portal and the portal interval section are collected, a scatter diagram is drawn to carry out Greirschner parabola fitting, the maximum flow value is obtained and serves as the bottleneck traffic capacity of the road section, and the speed value corresponding to the maximum flow value is a threshold value for judging whether the road section is congested or not; according to the vehicle operation data analysis result, the road section traffic operation condition is judged. According to the technical scheme, the traffic capacity and operation efficiency of the road can be improved.

The invention belongs to the field of superconducting electric suspension, and discloses an offline test device and method for a superconducting electric suspension system. The device comprises a suspension platform, a ground stator module, a ground auxiliary support device and a converter device. The suspension platform is arranged above the ground auxiliary supporting device, and the ground stator modules are located on the two sides of the suspension platform. A real suspension state is realized on the ground, and the suspension rigidity characteristics at different operation speeds are equivalent by simulating a rigidity control strategy. The real-time control current of the converter is inversely calculated through an equivalent stiffness control strategy to simulate the suspension stiffness characteristics of the superconducting electric suspension system at different operation speeds, and the suspension characteristics of the vehicle in the operation process can be truly reproduced. Compared with a vibration test fixed on the ground, the precise reproduction of the suspension rigidity can realize the precise reproduction of the vehicle-mounted vibration response under the electromagnetic harmonic disturbance of the vehicle.

This invention discloses a high-speed train axle positioning system and method, belonging to the field of high-speed train maintenance technology. The system includes: an undercarriage axle detection device, installed inside the track and movable along the track, used to detect the position of the axle from under the train; and a side-mounted axle position acquisition device, installed outside the track and movable along the track direction, used to transfer the axle position coordinates detected by the undercarriage axle detection device to its own coordinate system for use by maintenance equipment. This invention relies on the precise axle positioning technology of the undercarriage axle detection device, and then cooperates with the side-mounted axle position acquisition device to form a combined system, improving the operating speed of the side-mounted axle position acquisition device and the positioning accuracy of the axle.

This invention provides a motor control method, a motor control device, a readable storage medium, and a motor. The motor control method includes: setting a set speed and a set direction of rotation for the motor; acquiring the rotor position, operating speed, and operating direction of the motor while it is running; acquiring a first input value for the set speed and a second input value for the operating speed based on the operating direction, operating speed, set speed, and set direction of rotation; acquiring a target current based on the first and second input values; acquiring the actual current of the motor; acquiring a first control value based on the target current and the actual current; acquiring the chopping direction and duty cycle of the three-phase inverter bridge based on the first control value; acquiring the energizing phase sequence of the three-phase inverter bridge based on the operating direction of rotation; and controlling the motor operation using the three-phase inverter bridge based on the chopping direction, duty cycle, rotor position, and energizing phase sequence.

The application discloses a train strong wind adjustment control method and device, medium and train, relates to the field of rail trains, and solves the problem of low real-time performance of monitoring environmental strong wind changes. A vehicle-mounted wind measuring device is used to monitor the wind field in a certain range in front of the running direction of the train, and the real-time monitoring of the whole global continuous wind field around the train, including the wind speed and direction, obtains safety indexes such as the derailment coefficient and the wheel load reduction rate of a section of line in front, and is used for finding the strong wind condition that may affect the driving safety of the vehicle in advance, guiding the train to evaluate the maximum running speed according to the wind field near the line, and improving the line operation efficiency.

The invention provides a method and a device for testing wireless driving permission information, relates to the technical field of railways, and aims to solve the problem that no testing method is used for judging whether the wireless driving permission information is effective or not when a non-train occupies a red light band on a track. The method for testing the wireless driving permission information comprises the following steps: acquiring the current position of a train to be tested, a track circuit fault section and the wireless driving permission information; determining a train operation scene according to the current position of the train to be detected and the track circuit fault section; according to a most limited speed curve corresponding to the train running scene, position information when the running speed of a to-be-detected train is zero is determined, and the most limited speed curve is used for predicting the running speed of the to-be-detected train running on a rail and position information of the train on the rail at the running speed; and determining whether the wireless driving permission information is valid or not according to a matching result of a train permission position in the wireless driving permission information and the position information.

The application provides a vibration test load spectrum compiling method and device, and the method comprises the following steps: acquiring vibration acceleration time domain load, dynamic stress time domain response and vehicle running speed of the actual running condition of a hanging component; dividing the vehicle running speed data into several speed intervals according to the running speed range of the vehicle; obtaining vibration acceleration power spectrum and dynamic stress power spectrum through Fourier transform; performing goodness-of-fit test on the obtained vibration acceleration power spectrum to confirm the distribution of the vibration acceleration power spectrum; synthesizing the vibration acceleration power spectrum under all speed levels into vibration acceleration function test load spectrum under different confidence levels according to the proportion of each speed level in the service period of the vehicle; and compiling the vibration acceleration function test load spectrum under different confidence levels into corresponding vibration acceleration fatigue test load spectrum according to the vibration acceleration function test load spectrum, the service period and the target bench vibration test time.

The application discloses a kind of ladder door operating speed control method, device, electronic equipment and storage medium, comprising: the vibration signal of ladder door operation is collected, vibration value is extracted to vibration signal, speed adjustment coefficient is determined based on vibration value, speed adjustment amount is calculated using speed adjustment coefficient, vibration value and preset target vibration threshold, preset reference operating speed and speed adjustment amount are used to calculate target operating speed, control ladder door to operate at target operating speed, realize the real-time perception of mechanical vibration state of ladder door, and target vibration threshold is calculated as reference based on this, to dynamically optimize operating speed, can maximize door opening efficiency under the premise of guaranteeing smooth operation.

A rail-based intelligent transportation system includes: a vehicle frame; a control structure fixedly mounted on the upper wall of the vehicle frame and located at its center; and a guide rail structure that movably passes through the vehicle frame and is located at its center on the lower wall. This invention relates to the field of rail vehicle technology. The control console can monitor the weight of passengers on the floor in real time and identify overload or uneven loading. The console can also monitor the speed of the equipment in real time; if the speed is too high or too low, the console can control the motor reducer assembly to decelerate or accelerate to ensure a comfortable experience for passengers. The console can also monitor the distance to other equipment on the track in real time; if the distance is too close, the console will control the equipment to decelerate or even stop to avoid collisions. Through the AI ​​intelligent voice module inside the console, passengers can directly issue voice commands to have the equipment provide information about scenic spots or adjust the operating speed. The console can connect to the network to synchronize local weather in real time; if the weather is too severe, the console will remind the operator that operation is not possible. Through the above structure, intelligent control of the equipment is achieved, greatly improving the safety and comfort of the equipment.

The utility model provides a kind of loop structure for loop acceleration loading test, including loop body and the double-ring track being located in the both sides of loop body;The surface of loop body forms test pavement, and double-ring track is used to connect loading device and makes loading device load test pavement;Loop body includes two straight sections, two curved sections and four bend straight transition sections in turn butted into ring, one end of each bend straight transition section is respectively connected with the end of one of straight sections, and the other end is respectively connected with the end of one of curved sections;Curved section has fixed lateral slope, and bend straight transition section has gradual lateral slope, and gradual lateral slope gradually increases from the end of bend straight transition section and straight section to the other end.The loop structure for loop acceleration loading test provided by the utility model can reduce the turning radius under the premise of meeting the operating speed requirement of loading device, and improve the operating stability of loading device.

The application discloses a pepper harvesting equipment operation speed self-adaptive control system and method, and relates to the technical field of mechanical control. The system comprises the following steps: synchronously collecting the instantaneous value of the roller torque and the instantaneous value of the walking speed through fixed sampling intervals to reconstruct the phase space; the system comprises a phase trajectory generation module, which combines the instantaneous value of the torque and the walking speed to form an augmented phase space trajectory and calculates the spatial distance between each phase point; a recursive feature construction module forms a recursive matrix by judging the distance between the phase points; a recursive feature judgment module counts the distribution density of the recursive points in the diagonal direction, extracts the length distribution feature to calculate the recursive trend intensity; a speed control amount generation module judges the jamming state type according to the change rate of the recursive trend intensity, and generates a speed reduction adjustment amount according to a nonlinear compression function to optimize the operation speed, improve the harvesting efficiency and safety.

This invention relates to the field of data processing technology, and in particular to a method for detecting train operation anomalies based on multiple data sources. The method includes: data collection; identifying suspicious sections; determining sections of interest; assessing braking anomaly risk and identifying high-risk sections; adjusting preset parameters; and issuing deceleration warnings. This invention collects multiple key data sources in real time, identifies suspicious sections based on the airflow short-circuit index, then determines sections of interest by combining the airflow short-circuit index, water vapor concentration, and track humidity. Next, it assesses braking anomaly risk by combining the operating speed, braking distance, and track humidity of the sections of interest, and calculates the risk index level using relevant data to accurately locate high-risk braking sections. Finally, it adjusts preset parameters based on high-risk braking sections, re-determines high-risk braking situations, and issues deceleration warnings. This effectively solves the problems of low stopping accuracy and low risk identification accuracy caused by continuous heavy rainfall.

The invention relates to a high-order cruise optimal acceleration control method and system, and the method comprises the steps: determining prospective road conditions based on a navigation map, and the road conditions comprise the slope and curvature of a road; constructing a function of a first acceleration curve in a set look-ahead time domain based on the look-ahead road condition, the engine power and the vehicle running speed; defining a sliding mode surface by taking the speed error and integral and differential of the speed error as state variables, determining switching gain and boundary layer thickness of a sliding mode controller of the sliding mode surface based on road conditions, and outputting a function of a second acceleration curve in a set look-ahead time domain through a control law of the sliding mode surface; performing peak filtering on the higher values of the first acceleration curve and the second acceleration curve at the same moment to obtain the estimated acceleration of the vehicle; through deep fusion of navigation map data, a forward-looking sliding mode controller with parameters capable of being adaptively adjusted is designed, so that the high-order cruise process has smoothness, economical efficiency, safety and high robustness.

Some work vehicles are equipped with a continuously variable transmission (CVT) and a transmission control device that controls the acceleration and deceleration during gear changes according to the operating speed and amount when the main transmission lever, which allows for stepless gear changes, is operated. While the ability to perform various operations when accelerating and decelerating the vehicle improves convenience, adding buttons for each function increases the number of parts and thus the cost. Therefore, this invention provides a work vehicle that offers multi-functional gear changes with a simple configuration. [Solution] In a work vehicle equipped with a gear shift lever 15 for operating a transmission that changes the speed of the prime mover's power and transmits it to the drive wheels, and an operating switch 62 provided on the gear shift lever 15, the operating load of the gear shift lever 15 changes in steps with respect to the load change angle, and different control is performed when the operating switch 62 is operated at the angle before the load change and when the operating switch 62 is operated at the angle after the load change.

The invention relates to the technical field of pump operation control, and provides an energy-saving self-priming pump operation control method and system.The method comprises the steps that when it is judged that a liquid column is established, sending of an acceleration pulse instruction to a motor is stopped immediately, a preset smooth deceleration curve is switched through limited pulses, and the rotating speed of the motor is reduced to the preset low-speed operation rotating speed; meanwhile, reverse braking torque is applied; if it is judged that the liquid column is established, but the pressure first-order derivative is lower than a preset threshold value, or the current high-frequency variance is not displayed to be obviously reduced, entering a detection back-off mode, executing a preset low-amplitude perturbation pulse, and prolonging a pause observation period; and if the establishment of the liquid column cannot be confirmed after the preset number of micro-disturbances, returning to the ultra-smooth starting strategy. The method has the effect of improving the quality and stability of operation control of the self-priming pump.

The application discloses an automatic driving path planning obstacle avoidance method and system based on sampling and cost evaluation. The method comprises a spline curve fitting step, a path sampling step, a sampling path cost calculation step, an optimal path determination step and an optimal path speed planning step. The spline curve fitting step determines control points and curve parameters through specific calculation to obtain a discrete path. The path sampling step calculates and splices three sections to generate multiple candidate sampling paths with smooth transitions. The sampling path cost calculation step evaluates path cost from multiple dimensions such as longitudinal, transverse and lane changing and comprehensively calculates. The optimal path determination step selects an optimal path according to the cost evaluation result. The optimal path speed planning step optimizes the speed according to the obstacle collision situation. The application solves the problems of slow running speed, low planning success rate and non-smooth trajectory of the existing algorithm, improves the efficiency, success rate and stability of automatic driving path planning obstacle avoidance, is suitable for the automatic driving technical field, promotes the development of automatic driving technology, and effectively improves the driving safety and reliability of automatic driving vehicles in various complex environments.

The application provides a kind of fog group condition under highway lane level guiding method and device, comprising: for the vehicle that will enter fog group burst section and is passing through fog group burst section, real-time acquisition visibility value and vehicle driving information;Adopt vehicle operation safety speed estimation model under low visibility condition, to estimate the vehicle recommended operating speed and safe vehicle distance that guarantee vehicle operation safety;Adopt vehicle operation safety determination model under different visibility conditions, to determine the operation safety level of vehicle;Vehicle is executed corresponding vehicle control strategy, and lane level driving safety active induction is carried out to vehicle, so that vehicle i safely and efficiently passes through the fog group burst section.The application realizes accurate intervention and active guidance to road traffic flow operating state by photoelectric technology, realizes prewarning in front of road section, lane level active guidance under fog group condition, and the application effectively improves the safety and road traffic efficiency of road vehicle operation.

An arrangement for bringing an elevator car to safety at a faster speed. The arrangement comprises high-speed and slow-speed zones. When the elevator car is located at a slow-speed zone, a standard rescue speed is used. When the elevator is located at a high-speed zone, a faster operating speed is used. The speed zones are indicated inside the elevator shaft in a machine-readable manner.

The application provides a highway line quality evaluation method based on visual continuity, which comprises the following steps: (1) obtaining a two-dimensional design preliminary scheme of a road, including a horizontal section design file and a longitudinal section design file; (2) performing perspective transformation on the two-dimensional design preliminary scheme to obtain a driver's visual angle line; (3) inputting the driver's visual angle line into a variational autoencoder to obtain perspective characteristic parameters; and (4) performing visual continuity and expected speed coordination evaluation according to the perspective characteristic parameters to evaluate the highway line quality. The application evaluates the visual continuity and the running speed coordination of the highway line based on the horizontal visual parameters and the longitudinal visual parameters of the highway line, and evaluates the highway line quality, so that the defects of the single visual angle actual method are made up, and the overall design quality and level of the road geometry are improved.

This application discloses an adaptive energy-saving operation control system and method for escalators that detects passenger flow, relating to the field of intelligent control technology. It solves the technical problem in existing technologies where the threshold is generally set to a fixed value when comparing passenger flow with a threshold. This can lead to congestion and potentially stampedes during peak periods like holidays. This application utilizes data sensors to collect real-time passenger flow data entering the escalator area; it controls the escalator's start and stop based on the real-time passenger flow; it adjusts the escalator's operating speed based on the real-time passenger flow; it predicts passenger flow based on historical data; and it determines the escalator's maintenance and inspection time based on the prediction results. This system not only controls start and stop but also adjusts the operating speed based on real-time passenger flow. Appropriate speed reduction can bring exponential energy savings, directly reducing electricity costs and extending equipment lifespan.