17results about How to "Prevent speeding" patented technology

The embodiment of the application provides a control method and device of a rod wire loop device and a storage medium, the control method comprises the following steps: determining a loop starting time of the loop device according to a rolling piece running speed of a target rolling piece and a downstream rack biting time; determining a real-time loop height value according to the loop starting time, a loop starting initial height, a steady-state target loop height and a ramp rising time, and controlling the loop device to start the loop according to the real-time loop height value; acquiring a real loop height value of the loop device, and correcting an upstream rack running speed according to the real loop height value and the real-time loop height value; and when a tail of the rolling piece leaves the upstream rack, the loop device is controlled to fall back according to a tail loop closing target height. The method realizes adaptive control of the rod wire loop.

The invention relates to an assembly for a turbomachine turbine (10) having a longitudinal axis (A-A), comprising: a rotor disk (12) of the turbine, centered on the longitudinal axis; a shaft (14) of the turbine, centered on the longitudinal axis and rotated by the rotor disk; a first member for transmitting torque from the rotor disk to the shaft, the rotor disk being fixed in translation relative to the shaft in the direction of the longitudinal axis by a member (22) screwed onto the shaft; and a second member for transmitting torque from the rotor disk to the screwing member, wherein the unscrewing direction of the screwing member is identical to the rotation direction of the rotor disk in operation, and the second torque transmission member is configured to transmit rotational torque from the rotor disk to the screwing member when the first torque transmission member stops transmitting the torque from the rotor disk to the shaft.

The application discloses a supercharger protection method and device and a vehicle. The method comprises the following steps: obtaining the operation parameters of the supercharger; calculating the rotating speed of the supercharger according to the operation parameters; comparing the rotating speed of the supercharger with the maximum rated rotating speed of the supercharger, and determining the maximum fuel flow of the engine according to the size relationship. The technical scheme provided by the embodiment of the application constructs the anti-over-speed model of the supercharger through the operation parameters, recursively calculates the supercharger rotating speed of the future step and the fuel flow of the engine corresponding to the supercharger rotating speed of the future step according to the current rotating speed of the supercharger and the current fuel flow of the engine, compares the rotating speed of the supercharger with the maximum rated rotating speed of the supercharger, and determines the fuel flow of the engine corresponding to the supercharger rotating speed of the future step as the maximum fuel flow of the engine according to the size relationship, so that the supercharger over-speed can be identified in advance and prevented, and the damage of the supercharger can be effectively avoided.

This invention provides a method and system for dynamic correction of a hoist under speed loop control, relating to the field of data processing. The method includes: acquiring the hoist car's descent information during cargo entry into the hoist car, and performing dynamic correction of the hoist's descent based on this information; collecting the real-time motor speed of the hoist during cargo transportation, and adjusting the phase current of the hoist motor based on the real-time motor speed and a preset motor speed; and acquiring the hoist car's lifting information during cargo exit from the hoist car, and performing dynamic correction of the hoist's lifting based on this information. This method has the advantage of improving the real-time performance and accuracy of hoist correction.

This invention relates to the field of ship dynamic positioning technology, specifically disclosing a method and system for ship dynamic positioning control applicable to diesel engine-driven vessels. The method includes: S1: acquiring environmental data, calculating the total environmental load force, and determining the upper limit of the thruster and its corresponding upper limit of the diesel engine speed; S2: determining the lower limit of the theoretical diesel engine speed based on the upper limit of the diesel engine speed, and calculating the lower limit of the diesel engine speed and its corresponding lower limit of the thruster thrust based on the lowest stable diesel engine speed; S3: acquiring the initial thrust requirement of the thruster, determining the final thrust of the thruster based on the initial thrust requirement, the upper limit of the thruster thrust, and the lower limit of the thruster thrust, and driving the thruster through the diesel engine according to the final thrust of the thruster to achieve ship positioning control. This invention can fully utilize the high thrust advantage of diesel engines and avoid the shortcomings of slow speed adjustment, balancing thrust requirements and response speed without changing the hardware.

The invention provides a micro-nano satellite multi-constraint fine control method based on actuator dynamics, and belongs to the field of spacecraft control, and the method comprises the steps: considering the electromechanical characteristics of a reaction wheel, and building a micro-nano satellite attitude deep coupling model containing the dynamic characteristics of the reaction wheel; aiming at reaction wheel axle friction and counter electromotive force interference, designing a double-interference observer to accurately estimate the reaction wheel axle friction and counter electromotive force interference; designing a nonlinear state-dependent obstacle function to convert a constraint state into a tracking control variable according to the star rotating speed and reaction wheel current physical constraint; and a composite controller is constructed by combining a double-interference observer and a nonlinear state-dependent barrier function, and the design of the high-precision controller of the micro-nano satellite is completed. According to the method, the problem of various physical constraints in micro-nano satellite control can be solved, the interference of the reaction wheel is compensated, and the method has the characteristics of high reliability and high accuracy.

The present application provides a kind of wind turbine blade pitch angle compensation method, equipment, medium and product, method includes: according to sampling period real-time acquisition generator real-time speed data;According to real-time speed data, calculate real-time speed deviation and real-time speed deviation change rate;According to real-time speed deviation and real-time speed deviation change rate, query optimal compensation variable pitch rate table, find corresponding optimal compensation variable pitch rate;If compensation variable pitch rate is greater than set threshold, then compensation variable pitch rate is converted into compensation pitch angle, trigger wind turbine anti overspeed function, make wind turbine adjust the angle of retraction according to compensation pitch angle.The present application judges whether wind turbine faces the problem of excessive generator speed by current generator real-time speed deviation and real-time speed deviation change rate, gives optimal compensation pitch angle command wind turbine to increase the angle of retraction, which can effectively prevent wind turbine overspeed and keep generator speed stable.

The invention relates to the technical field of wind power generation, and discloses a wind turbine generator control method which comprises the steps that when a wind turbine generator operates normally, millisecond-level wind speed sets in a plurality of continuous millisecond-level time periods are obtained; based on each millisecond-level wind speed set, respectively determining a millisecond-level wind speed change rate corresponding to each millisecond-level time period; determining the change condition of the overall wind speed based on each millisecond-level wind speed change rate, and predicting the change trend of the overall wind speed based on all the millisecond-level wind speed sets; determining whether the change condition meets a first condition or not, and determining whether the change trend meets a second condition or not; and if it is detected that the first condition and the second condition are triggered at the same time, the wind turbine generator is controlled to retract paddles. The method can improve the safety performance of the wind turbine generator. The invention further discloses a control system and device of the wind turbine generator and a medium.

The utility model is towards coaxial speed reducer of forced lubrication system, its structure is that the gear box is equipped with synchronous gear group, synchronous gear group is installed through bearing with the side wall of gear box, the side of gear box is connected oil filter through pipeline, oil filter is connected high speed flow pump through pipeline, high speed flow pump is connected fan condenser through pipeline, fan condenser is connected top partial flow pipe in the top of gear oil through pipeline, the side wall of gear box is equipped with the wallboard flow channel to each bearing position, top partial flow pipe intercommunication each wallboard flow channel, and the drive end of high speed flow pump is connected synchronous gear group one axle through coaxial speed reducer body. The utility model has the advantages of: 1) initiative oil injection and passive splashing work cooperatively, and the lubrication is covered overall and high heat dissipation efficiency; 2) coaxial speed reduction structure can effectively prevent oil suction pump overspeed, improve durability and adaptability; 3) compact structure, small space occupation, applicable to high frequency, high temperature, heavy load mechanical transmission system.

This invention relates to the field of mobile robot control technology. The RGV (Automated Guided Vehicle) linear velocity control method provided by this invention aims to achieve efficient and safe operation of the vehicle on complex tracks. By acquiring real-time vehicle position, speed, and track information, and using a preset control algorithm to plan the speed change curve, the system adjusts the motor speed and steering to control the vehicle speed. Simultaneously, it receives vehicle feedback and compares it with the expected planned data, using a genetic algorithm to optimize control commands. This invention improves the operating efficiency, safety, and compatibility of RGVs on complex tracks, providing technical support for applications such as automated storage and retrieval systems (AS / RS).

The invention discloses a wind turbine generator extreme gust anti-overspeed control method and device, and the method comprises the following steps: obtaining the wind wheel rotation speed data of a wind turbine generator, and judging whether the operation condition of the wind turbine generator is an extreme gust condition or not based on the wind wheel rotation speed data; when the operation working condition is the extreme gust working condition, generator rotating speed data, a pitch angle actual value and a given variable pitch rate of the wind turbine generator set are obtained; through a PD control strategy, the superposition variable pitch rate is calculated by combining the rotating speed data of the generator; and based on the sum of the superimposed variable pitch rate and the given variable pitch rate, a pitch angle adjustment value is calculated, and blades of the wind turbine generator are controlled to be subjected to advanced variable pitch according to the pitch angle value. Gust variable-pitch control is introduced on the basis of traditional variable-pitch control, when gust is detected, the gust variable-pitch control can be rapidly collected, thrust and torque borne by a unit are reduced, overspeed is prevented, the load of the unit is reduced, and technical cost reduction of the wind turbine unit is facilitated.

The invention provides a built-in self-adaptive adjustment inner channel turbine box structure which comprises a turbine box inlet, a turbine box throat and a turbine box original inner channel, a plurality of metal sheets are installed in the turbine box original inner channel and connected end to end to form a new inner channel, and each metal sheet is further flexibly connected with the turbine box original inner channel. The sectional area of the new inner channel can be changed along with the flow in the turbine box, and the sectional area of the new inner channel is smaller than that of the original inner channel of the turbine box. According to the turbine box structure with the built-in self-adaptive adjustment inner channel, the multiple metal sheets are additionally arranged in the turbine box to form the inner channel, so that the turbine rotating speed of the turbine box can be increased under the working condition that the flow is small, efficient utilization of fluid is achieved, the connecting structures between the metal sheets are utilized, and the flow rate of the turbine is increased. The turbine box can increase circulation in a self-adaptive mode under the working condition of large flow, the efficiency of a turbine under the calibration point and large flow working condition is guaranteed, and meanwhile the turbine is prevented from being overspeed.

The invention belongs to the technical field of rail transit, and particularly relates to a train traction calculation method and device based on interval speed limit correction. Under the service braking performance of the train, the maximum allowable speed of each speed limiting starting point in the current position and the follow-up set range is calculated in an iterative mode, it can be guaranteed that overspeed does not occur at the next speed limiting starting point after service braking is conducted at the current position as long as the speed of the train is controlled not to exceed the maximum allowable speed of the current position, and the speed limiting effect is guaranteed. And the overspeed is avoided in the subsequent speed limit interval. In the whole iteration process, automatic iteration can be completely achieved through the algorithm, and manual repeated attempts are not needed. The technical problem that in the prior art, the overspeed problem can be avoided only by manually trying to adjust the calculation step length for multiple times is solved.

This invention relates to the field of monorail crane technology, and discloses an explosion-proof monorail crane capable of preventing runaway. It includes a crane box with a groove on its top. A drive and shock-absorbing mechanism is fixed within the groove and movably connected to a track. The top of the track has mounting holes. This explosion-proof monorail crane achieves both runaway prevention and shock absorption. A second roller acts as the drive, moving the crane box, while a first roller rolls within the bottom of the track. The combined use of the first and second rollers makes the crane box movement more stable, effectively preventing runaway. When the first roller rolls, the movable frame slides upwards under the action of a damper and a second spring. A third spring and a stop plate support the movable frame. The damper provides shock absorption, effectively reducing the swaying of the crane box.

The invention relates to the technical field of wind power generation, and discloses a mechanical variable-pitch protection system and a wind turbine generator. The mechanical variable-pitch protection system comprises an energy storage device, a transmission device, a transmission shaft, a main shaft and blades which are connected in sequence; the variable pitch driving mechanism is connected with the energy storage device through the transmission device and connected with the blades. The mechanical variable-pitch protection system has a first state that blades rotate to drive a main shaft to rotate, a transmission shaft rotates, a transmission device acts, and kinetic energy is stored in an energy storage device; and in the second state, when the control module receives a shutdown signal and a failure signal of the electrically-driven variable pitch system, the energy storage device releases energy, and the blades are driven to rotate to the 90-degree feathering position through the transmission device and the variable pitch driving mechanism. According to the mechanical variable-pitch protection system, when the wind turbine generator set is shut down emergently and the electric drive variable-pitch system fails, the blades are driven to rotate to the 90-degree feathering position, energy input is reduced, speed reduction of the wind turbine generator set is achieved, and overspeed and accidents are prevented.

The invention discloses an electric braking method for an elevator, which is applied to an elevator control system and comprises the following specific steps: step 410, when electric braking is required; 420, the elevator enters closed-loop control; 430, according to the running direction of the elevator, the forward torque instruction or the torque current instruction Iqcmd is limited to be 0; the absolute value of the reverse torque instruction or the torque current instruction Iqcmd is limited to be smaller than or equal to the threshold value A, so that the frequency converter outputs negative power. Electric braking can be achieved without an independent switch, and electric braking can be achieved purely through the frequency converter. Therefore, the cost and the space are saved. In addition, if the number of components is reduced, the overall reliability of the system is also improved. The problems of overspeed caused by insufficient torque of low-speed and high-speed star sealing braking, large current during high-speed sudden stop star sealing and thermal risk caused by too long star sealing braking time due to too low speed after the star sealing braking is stable can be solved.