18 results about "Intermittent control" patented technology

A fuel supply system for an aircraft according to the present invention comprises: an intermediate tank which is fluidly connected to a fuel pump and an engine via a fuel supply path; a pressure sensor which detects the internal pressure of the intermediate tank or a tank pressure that is correlated with the internal pressure of the intermediate tank; and a processing circuit which executes intermittent control for controlling a pump actuator in accordance with the tank pressure. The intermittent control includes: when the tank pressure increases and reaches a first threshold value, controlling the pump actuator to stop the fuel pump in a state where supply of a fuel to the engine from the intermediate tank is allowed; and when the tank pressure decreases and reaches a second threshold value which is lower than the first threshold value, controlling the pump actuator to drive the fuel pump.

The invention belongs to the field of motor energy-saving control, and particularly relates to a fan group control method based on air volume decoupling distribution, which comprises the following steps: S1, parameter initialization and environment perception; s2, calculating a target total air volume based on a piecewise linear model of the dynamic temperature control bandwidth; s3, fan cluster total air volume integer distribution based on the energy efficiency optimal principle is executed; s4, long-period intermittent control is carried out on the remaining air volume; and S5, executing a life balance scheduling and dead zone protection mechanism based on space symmetry. Through cooperative work of parameter initialization, air volume decoupling, energy efficiency distribution and a space symmetric scheduling mechanism, low-cost, high-energy-efficiency, high-precision and uniform-airflow energy-saving regulation and control of a large-space controlled environment are achieved on the premise that frequency conversion transformation is not needed.

The invention relates to a steam source automatic switching control method based on multi-parameter collaborative decision, and the method achieves the online precise recognition of a switching trigger condition through an automatic judgment mechanism based on multi-parameter collaborative decision, automatically judges the preheating completion state of a pipeline, and overcomes the limitations that a conventional control method depends on human experience, and is single in monitoring parameter. On the basis, a smooth valve control instruction is generated by utilizing the control targets of automatic step sequence, dynamic balance switching speed and process smoothness combined with intermittent control and cooperative adjustment, and accurate cooperative adjustment of the main steam source valve and the standby steam source valve is achieved. According to the method, on the premise that the pressure, the temperature and the water level of the deaerator are stable, the steam source switching time is remarkably shortened, parameter fluctuation in the switching process is reduced, and the flexibility and the safety of a unit to cope with start-stop peak regulation and deep peak regulation working conditions are improved.

The invention discloses a discrete agent-based load group modeling and consistency regulation and control method and system, and the method comprises the steps: building a discrete time load group model based on a load group, and enabling the discrete time load group model to comprise a leader and a plurality of followers; determining a system matrix including an adjacent matrix and a leader connection matrix; dividing the followers by using competition relationship representation; obtaining a low-gain state feedback matrix; setting the maximum response time of regulation and control; in the regulation and control process, a complete intermittent control protocol and a partial intermittent control protocol are generated; respectively calculating control tracks of followers under different control protocols and corresponding saturation constraint values; calculating a consistency error between the system states of the leader and the follower at the regulation and control time k; and judging whether the regulation process is ended or not according to the consistency error. According to the method, control paradigm innovation, heterogeneous system compatibility, time-varying demand adaptation, communication overhead optimization, stable performance guarantee and system self-evolution can be realized, and the flexibility, high efficiency and engineering practicability of power load regulation and control are remarkably improved.

The present application belongs to the field of motor energy-saving control, and specifically refers to a fan group control method based on air volume decoupling distribution, comprising the following steps: S1 parameter initialization and environment perception; S2 segmented linear model calculation of target total air volume based on dynamic temperature control bandwidth; S3 execution of fan cluster total air volume integer distribution based on energy efficiency optimization principle; S4 long-period intermittent control for residual air volume; and S5 execution of life balance scheduling and dead zone protection mechanism based on spatial symmetry. Through the cooperative work of parameter initialization, air volume decoupling, energy efficiency distribution and spatial symmetry scheduling mechanism, the present application realizes low-cost, high-energy efficiency, high-precision and airflow uniformity energy-saving regulation and control of large-space controlled environment without the need of frequency conversion modification.

The application provides a non-periodic intermittent-based fractional-order Chua circuit system finite time control method and system, comprising: setting an initial state of the fractional-order Chua circuit system, and measuring a state variable of the fractional-order Chua circuit system by using a sensor; constructing a finite time non-periodic intermittent controller by using the state variable measured by the sensor; converting a digital control signal output by the finite time non-periodic intermittent controller into a physical quantity by using an executor, and injecting the physical quantity into a corresponding node of the fractional-order Chua circuit system in a working interval, so as to realize finite time stable control of the fractional-order Chua circuit system. The application provides a new solution for finite time control of the fractional-order Chua circuit system, can be applied to fields such as chaos synchronization and secret communication, and has theoretical value and engineering practicability.

The application belongs to the field of polishing test, and discloses a grinding material polishing test analysis method and device, the method comprising: S1, placing a test workpiece and a grinding sheet in a polishing test device, and performing multiple rounds of polishing test, each round of polishing test comprising an effective polishing stage and an intermittent control stage; S2, obtaining a surface image of the test workpiece after the polishing test of multiple rounds of cycles is completed; S3, calculating the surface image using an improved omnidirectional multi-scale detection algorithm to obtain a visual performance score of the grinding sheet. The application realizes no-missing response to multiple direction scratches through an omnidirectional filter and continuous direction interpolation, and significantly reduces the missing detection rate of multi-directional cross scratches. Based on the self-adaptive determination of the grinding sheet granularity number, multiple sets of detection scale parameters are determined, so that the filter can effectively capture different width scratches from coarse to fine at the same time, and the comparability of test results of different specifications of materials is ensured.

The application discloses a resilient intermittent control method and system for a single-link mechanical arm system under a deception attack, and the method comprises the following steps: constructing a model of the single-link mechanical arm system; under the deception attack, constructing an event triggering mechanism for the single-link mechanical arm system model; based on the single-link mechanical arm system model and the event triggering mechanism, constructing a fuzzy state estimator; based on the event triggering mechanism and the fuzzy state estimator, constructing a resilient adaptive controller by using a backstepping method; inputting the rotational inertia, the link mass and the link length of the single-link mechanical arm into the model of the single-link mechanical arm system, inputting the angle variable between the link after triggering the attack and the horizontal ground, the estimated angular velocity of the mechanical arm joint and the adaptive parameter value as the input values of the resilient adaptive controller, obtaining the output value of the resilient adaptive controller, and controlling the action of the single-link mechanical arm system based on the output value.

The utility model discloses processing equipment for a core body in a disposable hygienic product, which relates to the technical field of hygienic product production equipment and comprises an adsorption die wheel, a first conveying mechanism, a first glue spraying mechanism, a first blanking mechanism, a second conveying mechanism, a second glue spraying mechanism and a second blanking mechanism, macromolecules are efficiently adsorbed through the adsorption cavity and discharged to the adhesive layer, the fluffy cotton is subjected to glue spraying through the second glue spraying mechanism, and another layer of macromolecules is overlaid on the fluffy cotton through the second discharging mechanism. Different adsorption cavities in the adsorption mold wheel are matched with the first discharging mechanism and the second discharging mechanism, and macromolecules are efficiently transferred in a negative-pressure macromolecule adsorption mode, so that the macromolecules can effectively penetrate into fluffy cotton in the middle, and the adsorption effect of the fluffy cotton is improved. Intermittent control in different forms can be realized by changing an adsorption grid of the mold wheel, the macromolecule spreading amount at different positions can be freely set, high-speed operation is realized, synchronous and same-speed online operation with a host is kept, and the stability of the product structure and quality is ensured.

The application discloses a multifunctional small table plate for rail transit, and relates to the technical field of high-speed rail equipment.The multifunctional small table plate comprises a support plate, a driving motor, a threaded rod, a threaded sleeve, a main table plate, a sub table plate and an intermittent control assembly.The driving motor drives the threaded sleeve to move, and the main table plate is driven to rotate and unfold around the connecting support through the first connecting rod.The sub table plate can be slidably accommodated in the main table plate and is pulled outwards when it needs to be extended.The key lies in the intermittent control assembly: during the pulling process of the sub table plate, the linkage mechanism drives the control rod to move downwards, the triangular chuck head is made to pass over and hook the control push head to realize automatic segmented locking, external force or bumping is effectively prevented from causing retraction, and the use stability is ensured;when the sub table plate is retracted, the L-shaped connecting rod needs to be slightly pulled to trigger the unlocking mechanism to make the L-shaped connecting rod separate from the control groove, and then the sub table plate can be smoothly pushed back.The multifunctional small table plate realizes one-key unfolding of the main table plate, flexible length adjustment and reliable self-locking of the sub table plate, has compact structure, safe and convenient operation, and is particularly suitable for the rail transit environment.

The application discloses an intelligent intermittent control method, system and device of an oil production system and a storage medium, and comprises the following processes: S1, acquiring continuous production work diagram data of a current oil well; S2, judging whether the oil well reaches a steady state production through the continuous production work diagram data; S3, if the oil well reaches the steady state, calculating the pump efficiency of the oil well in the steady state, and issuing a pumping unit shutdown instruction when the calculated pump efficiency is less than or equal to a set minimum pump efficiency; and S4, calculating the change amount of the static load value when the liquid level height changes after the pumping unit is shutdown, and issuing a pumping unit startup instruction when the change amount of the static load value is greater than or equal to a set load change value. The method realizes real-time intelligent intermittent control according to the actual state of the oil well, and does not need additional manpower and material resources.

The utility model provides a sesame cake recycling device. The sesame cake recycling device comprises a material suction device, a main pipeline, a first exhaust fan and an intermittent control device, the material suction device comprises a second exhaust fan, a branch pipeline, a hose connector, a feeding hose and a feeding head, the branch pipeline is connected with the main pipeline, one end of the main pipeline is a closed end opening, and the other end of the main pipeline is an open end; the first exhaust fan is mounted on the main pipeline at the downstream of the joint of the branch pipeline and the main pipeline, and an intermittent control device is further mounted on the branch pipeline. The first exhaust fan and the second exhaust fan act together to enable cake meal to be smoothly sucked into the branch pipelines from a barrel of the oil press, and the cake meal is conveyed to a recovery terminal after being converged into the main pipeline. The intermittent control device can prevent the two exhaust fans from being frequently started and stopped in the cake recycling process, operation is simplified, and the position of the feeding hose can be conveniently replaced. The sesame cake recycling device effectively solves the problems that existing sesame cake recycling efficiency is low, and operators are prone to being scalded, the cake recycling process is more efficient, safer and more stable, and the production efficiency is greatly improved.

The application discloses a switching control method based on SPWM soft starting and a pulse type load LLC resonant converter. k The converter mainly comprises an LLC resonant converter, an H-bridge inverter circuit and a load thereof, and the control method is as follows: k For any positive integer, the load state is accurately judged through an H-bridge switching logic unit, and burst intermittent control and linear frequency control are respectively adopted in the no-load state and the full-load state in the steady state; when the load is switched, two-pulse optimal control is carried out by using a nonlinear SOTC optimal trajectory controller, so that the state is transitioned to a new mode along the shortest trajectory, and a dynamic response optimizer is introduced to compensate the frequency after switching according to the state radius error, so as to suppress voltage secondary fluctuation, solve the problems of slow dynamic response and large output voltage fluctuation of a traditional linear control facing the pulse type load LLC resonant converter, and improve the output voltage stability and anti-interference ability of the system.

This invention discloses a device and method for testing the compressive strength of pellets, belonging to the field of pellet testing technology. The invention includes a frame, with a PLC control device on one side and a feeding device on the other side. A receiving device is located at the output end of the feeding device, comprising a closed rolling chain with four sets of receiving bowls and one set of discarding bowls evenly fixed to its surface. This invention employs a unique mechanical structure with four receiving bowls and one discarding bowl, combined with precise intermittent PLC control logic, to enforce random discarding of test samples from both physical structure and testing process perspectives, effectively ensuring the randomness and representativeness of the final test samples. Through the coordinated operation of the PLC control device and various execution units, the entire process of feeding, identification, testing, and discarding is automated.

The utility model discloses an electronic circuit adopting intermittent charging and discharging. The electronic circuit comprises a control circuit, a power level circuit and a charging circuit. The control circuit generates a charging control signal. The power stage circuit receives a voltage signal. The charging circuit is coupled to the power stage circuit and the control circuit, and is controlled by the control circuit according to the charging control signal. The control circuit controls the charging circuit to charge the power level circuit for multiple times in a plurality of working periods of a plurality of continuous pulse waves of the charging control signal so as to generate a plurality of charging sections of a rising wave band of the voltage signal. The control circuit controls the charging circuit to stop charging the power level circuit in a plurality of non-working periods of a plurality of continuous pulse waves of the charging control signal, so that the voltage signal generates a charging stopping horizontal line segment or an elevator discharging segment between two of a plurality of elevator charging segments. According to the utility model, intermittent control is adopted for charging and discharging of the power level circuit, so that the control accuracy of the electronic circuit adopting intermittent charging and discharging is greatly improved.

This invention relates to the field of oil well intermittent control technology, and particularly to an intermittent control method based on edge computing. The steps are as follows: S101: Set the oil well information transmission path and generate basic oil well analysis data; S102: Perform edge computing through the wellhead RTU based on the basic data to complete information extraction and analysis, generating single-well production, daily power consumption, dynamic fluid level, and system efficiency; S103: Set parameter constraints online; S104: Perform online discrimination based on the parameter constraints and correct the operating cycle T, start-up time RT, and shutdown time ST; S105: Automatically set the optimal operating cycle T, start-up time RT, and shutdown time ST on each wellhead RTU; S106: After setting the optimal operating cycle T, start-up time RT, and shutdown time ST, automatically display the data in tables and experimental data curves. This invention improves the safety, reliability, and stability of intelligent intermittent oil well operation, significantly increases mechanical production efficiency, and reduces costs.

The invention discloses an event-triggered intermittent control method for a pitch angle of a wind generating set, and belongs to the technical field of wind motor control. The method is characterized by comprising the following steps: step 1, constructing a dynamic model of the wind driven generator; step 2, setting a control target as a full-load region in which the wind driven generator operates, and defining an adjustment error conversion control target; 3, designing a neural network adaptive estimation law based on the converted control target; 4, constructing a self-adaptive neural network controller, and estimating an unknown dynamic part and nonlinear function compensation of the wind driven generator in real time; and 5, carrying out interval division on the control process to realize real-time tracking control on the pitch angle of the wind generating set. According to the technical scheme, the control interval and the rest interval are reasonably divided, and the neural network estimation law is utilized, so that the control cost and the communication resource consumption are reduced, and meanwhile, the stable operation of the wind driven generator system and the improvement of the control performance are ensured.

This application relates to a dynamic intermittent control method, apparatus, device, storage medium, and program product. The method includes: acquiring the expected grid connection value of a single-unit infinite bus power network system and the actual state value of the single-unit infinite bus power network system; outputting intermittent control signals based on the expected grid connection value and the actual state value to control the operation of an actuator; wherein the intermittent control signals are used to indicate the frequency of operation through control commands, so that the actuator remains silent when the single-unit infinite bus power network system is in a stable equilibrium range. This application can reduce the frequency of control command operations, allowing the actuator to remain silent when the system is in a stable equilibrium range, activating and applying effective control only when necessary, thereby reducing mechanical and electrical wear of the mechanism and significantly extending the service life of the equipment.