250 results about "Passive control" patented technology

The invention belongs to the technical field of hypersonic flight vehicle control, and relates to a rigid-elastic coupling-oriented active and passive integrated control method for a hypersonic flight vehicle. The invention aims to realize stable tracking control of the elastic hypersonic flight vehicle. The method comprises the following steps: constructing a longitudinal dynamic model of the elastic hypersonic aircraft; self-adaptive identification of the elastic vibration frequency is realized through a cascaded self-adaptive filter; an elastic modal filtering estimation method is designed, and high-precision and low-cost elastic modal state quantity is provided for subsequent active feedback controller design; and then rigid-elastic coupling model decomposition is carried out, the control performance is ensured by using active disturbance rejection passive control for a rigid body subsystem, an RBF neural network is introduced for an elastic subsystem, an elastic mode is actively inhibited by using sliding mode control, and stable tracking of a reference instruction is realized. The method is an active and passive integrated control method for the hypersonic flight vehicle oriented to rigid-elastic coupling, and the application prospect is wide.

A moving body that can be transported in a state to stabilize the posture of the transport object, without affecting the transport object due to the inclination of the moving body when moving forward. A moving body comprising a holding mechanism that has a rotation unit that rotates in the pitch direction, and approximately horizontally holds an object to be transported from the side near the center of gravity of a transport unit capable of storage or above the center of gravity. Further, a moving body wherein the holding mechanism has a uniaxial rotation unit that rotates only in the pitch direction. Further, a moving body wherein the holding mechanism approximately horizontally holds the transport unit by active control. Alternatively, the holding mechanism approximately horizontally holds the transport unit by passive control.

The invention discloses a ship main propulsion intelligent control system based on multi-source data fusion, and relates to the technical field of ship main propulsion intelligent control. The problems that in the prior art, dynamic optimization is insufficient, the data fusion capacity is weak, energy efficiency is low, a fault-tolerant mechanism is passive, a control strategy is rigid, fault recovery is slow, the intelligent level is low, and complex environment changes cannot be handled are solved. According to the invention, by introducing a multi-source data fusion intelligent control algorithm, power distribution and battery scheduling of the ship main propulsion system are dynamically optimized, deep fusion is carried out in combination with environment data and equipment data, and the propulsion efficiency and energy management are improved; through multi-dimensional data fusion, system adaptability and fault-tolerant capability are improved, real-time adjustment and intelligent prediction are realized, fuel consumption is reduced, battery aging is reduced, and navigation stability is improved. The system further has an intelligent fault detection and prediction mechanism, manual intervention is reduced, and the fault-tolerant capability and the intelligent level of the system are improved.

The invention provides a fixed frequency Boost converter control method, system and device and a medium, and the method comprises the steps: building a corresponding circuit mathematical discrete model according to the circuit topology of a converter; based on a system power balance principle, correcting the circuit mathematical discrete model to obtain a converter prediction control model; according to the converter predictive control model, a predictive control cost model is constructed based on a predictive error minimization principle; according to the predictive control cost model, constructing a duty ratio signal output model based on a minimum predictive control cost principle; obtaining a real-time optimal control output voltage according to a pre-constructed converter passive control model, and inputting the real-time optimal control output voltage into the duty ratio signal output model to generate an optimal duty ratio signal; and controlling the converter to operate according to the optimal duty ratio signal. According to the invention, the dynamic response speed and anti-interference performance of the system can be effectively improved, and reliable guarantee is provided for the dynamic performance of the converter.

The invention discloses a control method of a multi-split air conditioner based on load self-adaption and an air conditioning unit, and relates to the technical field of air conditioner control. The technical problems that when the multi-split air conditioner operates at small load at night, due to the fact that the output capacity is not matched with the required load, the control mode is passive, and self-adaptive adjustment is insufficient, a unit is started and stopped frequently, room temperature fluctuates, and a user feels uncomfortable are solved. Each indoor unit is independently controlled, a load self-adaptive matching algorithm is adopted, room loads are calculated through real-time monitoring, matched output capacity loads are generated according to real-time load changes in respective rooms, and independent control logic is generated; the outdoor unit calculates the supply capacity according to the parameter change of each indoor unit, realizes load self-adaptive adjustment based on the combined control of the compressor frequency and the fan rotating speed, and automatically optimizes and iterates the room load through the real-time matching and automatic optimization of the output capacity of the outdoor unit and the room load on the premise of not increasing hardware. And real-time supply and demand matching of loads in each room is realized.

The invention discloses a yaw collecting ring temperature intelligent control system, method and device, a medium and a product, and relates to the field of wind power generation, and the method comprises a temperature collection unit which is used for collecting temperature information of the surface of a collecting ring in real time; the temperature characteristic analysis unit is used for processing the temperature information to obtain a multi-dimensional temperature characteristic value; the data management unit is used for collecting multi-dimensional temperature characteristic values to construct a historical database; the temperature prediction and abnormality diagnosis unit is used for obtaining a temperature prediction result and an abnormality judgment result based on historical data in the historical database and the real-time multi-dimensional temperature characteristic value; the temperature control unit is used for adjusting the working temperature of the collecting ring on the basis of the real-time temperature information when the temperature prediction result exceeds a preset safety threshold value or the abnormity judgment result shows an abnormal condition; according to the method and the device, the crossing from passive control to active prediction can be realized, so that the problem that predictive maintenance is difficult to realize in the traditional technology is effectively solved.

The invention relates to the technical field of aircraft manufacturing process equipment, in particular to an intelligent shape maintaining tool and method for a butt joint face of an aircraft fuselage, and is suitable for shape maintaining of the aircraft fuselage in the hoisting and assembling process, especially in the three-section butt joint process. The core of the tool is a machine body butt joint surface stress monitoring system composed of force sensors and a passive control system composed of servo electric push rods. The shape maintaining tool is composed of a shape maintaining frame, an inner shape clamping plate, a force sensor and a servo electric push rod, the force sensor is fixed to the inner shape clamping plate and makes direct contact with the inner side of the machine body to monitor the stress state of the butt joint face, the bottom of the servo electric push rod is connected with the shape maintaining frame, and the top of the servo electric push rod is connected with the clamping plate to adjust the stress state of the butt joint face. The problem that a traditional shape maintaining tool cannot achieve self-sensing and self-control is solved, the requirements for high precision and low stress of aircraft fuselage assembly are met, and the fuselage assembly quality is remarkably improved.

The invention provides a spinach cleaning quality detection method based on image recognition, and relates to the technical field of image or video recognition. A closed-loop control framework integrating active detection, cross-modal sensing, physical modeling decoupling and intelligent decision optimization is constructed; cleaning efficiency and quality bottlenecks caused by single information dimension and passive control mode in the prior art are fundamentally solved; the self-adaptive cleaning device has the final beneficial effects that the energy consumption and the water consumption of a unit product are greatly reduced by precisely putting water flow energy according to requirements while the cleaning cleanliness stability under complex working conditions is remarkably improved, and self-adaption and self-optimization of the whole cleaning process are realized.

The invention relates to the field of electric vehicles and other electric power control, in particular to an excitation fuse with an active and passive integrated protection function, which comprises an excitation source, a passive control power supply circuit, an excitation action piece, a conductive piece and a magnetic trigger device in mechanical linkage with a switch arranged in series in the passive control power supply circuit, the magnetic triggering device is arranged on a magnetic field loop generated when the conductive piece is electrified; the switch in the normal working state is in a normally open state; the excitation source can receive a trigger signal sent by the passive control power supply circuit or sent by the outside of the excitation fuse; when the current of the conductive piece exceeds a threshold value, the magnetic trigger device drives the switch to be closed, and the excitation source receives a trigger signal sent by the passive control power supply circuit to act; and the excitation action piece is driven to disconnect the conductive loop of the conductive piece. The protection is more reliable, the protection range is large, the action time is short, the loop resistance is low, the temperature rise power consumption performance is good, the size is small, and the structure is simple and reliable.

The present invention provides a semi-active tuned mass damper based on intelligent materials, comprising: a passive control part, an intelligent control part, a first-stage vibration reduction part, a second-stage vibration reduction part and a health monitoring part, wherein the intelligent control part uniformly controls the first-stage vibration reduction part, the second-stage vibration reduction part and the health monitoring part; the tuned mass damper of the present invention can achieve two-way vibration control of a building structure, real-time monitor the vibration responses of the tuned mass damper and the main structure, and start the semi-active control of the intelligent materials after the computer control system collects and analyzes data.

The invention relates to the technical field of automobile safety control, and provides an intelligent network connection automobile safety control system and method based on multi-source sensing fusion, and the system comprises a multi-source sensing module, a data processing module, and a cooperative control module. The multi-source sensing module comprises a sensor group and a data fusion unit, the sensor group senses information data and transmits the information data to the data fusion unit, and the data fusion unit performs fusion learning on the information data; the data processing module comprises a dynamic risk assessment module, an edge computing node and a cloud server, the dynamic risk assessment module analyzes and predicts data fused by the data fusion unit, the edge computing node is responsible for processing real-time data, and the cloud server performs global traffic flow optimization and historical accident data analysis; the cooperative control module comprises an active control layer and a passive control layer; the active control layer receives data processed by the edge computing node and performs active control; and the passive control layer receives data processed by the edge computing node and performs passive control.

An aircraft having a hybrid power source includes horizontal drive thrusters powered by an electric motor and forming a horizontal drive unit, vertical take-off / landing rotors forming with electric motors and a corresponding stored electrical energy source a vertical drive unit comprising an electric power supply bus, power generation sources connected to the electric power supply buses and by an input of a vertical drive unit and to each horizontal drive unit via an output of each vertical drive unit. The electric power supply controller emits a power command to the power generation source according to power requirements of the vertical and / or horizontal drive units. The stored electrical energy sources supply electricity according to the difference between the power requirements of the vertical and / or horizontal drive units. The power generation source recharges the stored electrical energy sources, so that the stored electrical energy sources are passively controlled.

The invention relates to a multi-mode switching anti-surge control method for a compressed air energy storage centrifugal compressor, which comprises the following steps: acquiring pressure and flow information at an inlet of the compressor, calculating a deviation value and a deviation change rate, and determining a control mode by a microprocessor; the fuzzy control part determines a control trend by inquiring a fuzzy membership table, the PID control part controls pressure through an outer ring and controls flow through an inner ring, weights of the pressure and the flow are distributed by a switching function, and finally, an output current signal is used for controlling the opening degree of an anti-surge valve, so that the surge phenomenon is inhibited. Therefore, the problems that an existing anti-surge passive control method mainly stays at a traditional PI control level, but a traditional PID control algorithm is greatly influenced by disturbance and model mismatch, and the anti-surge control application effect is greatly influenced are solved, the method can cope with scenes such as large wind power fluctuation and strong reality of illumination uncertainty factors, and the method is suitable for large-scale popularization and application. The method is suitable for compressed air energy storage large-scale wind and light absorption.

The invention discloses a squeeze film damper active control method based on RBF neural network PID optimization. The method comprises the following steps: acquiring state parameters of a rotor system through a data acquisition module; inputting the state parameters into an RBF neural network, and performing online optimization on PID control parameters by using the RBF neural network; based on the optimized PID parameters, a piezoelectric ceramic actuator is driven through a piezoelectric ceramic controller, the damping force of the extrusion oil film damper is adjusted, and active control over vibration of the rotor system is achieved. According to the method, RBF neural network nonlinear approximation and PID control stability are fused, the hysteresis and locking problems of traditional passive control are solved, active suppression of rotor system vibration is achieved, and the control precision and reliability are greatly improved.

The invention discloses a ship low-frequency active control system and method based on an intelligent material and an adaptive algorithm, and relates to the technical field of ship vibration control. The remote monitoring management platform is in communication connection with an intelligent material layer module, a sensor network module, a self-adaptive controller module, a self-diagnosis module and a power supply module; the intelligent material layer module is used for sensing ship vibration by adopting an intelligent material and generating corresponding control force; the sensor network module is used for collecting ship vibration data in real time through sensors arranged at key parts of a ship. By integrating intelligent materials and a self-adaptive control algorithm, ship vibration can be sensed in real time, corresponding control force can be quickly generated, vibration can be effectively counteracted, and compared with a traditional passive control technology, the response speed is remarkably increased, the ship vibration can be responded in a shorter time, and therefore the safety and comfort of ship navigation are improved.

Tether-based reaction control systems for spacecraft undergoing atmospheric entry or reducing orbital energy, including systems that use atmospheric drag on one or more tethers to alter the angle of attack of the spacecraft during its atmospheric transit to reduce the thermal and mechanical loads on the spacecraft during the reentry process. Systems may include tethers that together generate a force that functionally acts on the spacecraft at a point that is offset from the spacecraft's center of mass. Such systems may be either actively or passively controlled.

The invention discloses an active and passive control combined thermal management type methane reforming reactor which comprises a reactor shell and a stepping motor, the reactor shell and a sapphire window connected with the upper end of the reactor shell form a reaction cavity, and the reactor shell is filled with a porous medium; one side of the reactor shell and the bottom of the shell are respectively provided with a reaction gas inlet and a reaction gas outlet; a heat storage device shell is fixed to the outer side of the reactor shell, and a phase change heat storage material is installed in a closed cavity defined by the outer side of the reactor shell, the heat storage device shell and the sapphire window. A heat preservation layer is arranged on the outer side of the heat storage device shell in a surrounding mode. The stepping motor is used for driving the reactor to be close to or away from a solar radiation focus so as to adjust heat input. The phase change heat storage material is used for storing excess heat and performing heat compensation when the temperature is low, and the reactor is actively adjusted to be close to or away from a solar radiation focus to enable the surface energy flow of the reactor to tend to be stable, so that the problem that the methane dry reforming reaction is unstable is solved.

The invention discloses an intelligent shock absorption and noise reduction control method for rail transit, and belongs to the technical field of rail transit noise and vibration control. The method aims at solving the problems that traditional passive control measures are poor in adaptive capacity and limited in frequency band, and effective prospective offset is difficult to achieve due to system delay and inaccurate reference signals in existing active control. The method comprises the following steps: synchronously acquiring vibration and noise signals through a sensor array; calculating the contribution weight of vibration to noise by using a cross-domain modal correlation module based on an attention mechanism, and fusing the features; predicting an evolution sequence of vibration and noise in a specific time period in the future by adopting a long-short-term memory network model; synthesizing a target reference signal according to the prediction sequence, and generating an anti-phase control signal through an adaptive filtering algorithm; finally, it is ensured that the total delay of the system is smaller than the feedforward advance time, and an actuator is driven to achieve accurate foresight counteracting. The method is mainly used for improving the self-adaptive capacity and the control effect of the rail transit damping and noise reduction system.

The invention relates to a novel control surface for an underwater vehicle, which comprises two vertical rudders and two horizontal rudders, the two vertical rudders are arranged along the circumferential direction of a vehicle main body at an interval of 180 degrees, the two horizontal rudders are arranged along the circumferential direction of the vehicle main body at an interval of 180 degrees, and the interval angle between a single horizontal rudder and a single vertical rudder is 90 degrees; each vertical rudder structurally comprises a rigid section and a flexible section which are connected in sequence, the rigid section is connected with the output end of the driving assembly through a first connecting shaft, and the flexible section is connected with the aircraft body through a second connecting shaft. By arranging the vertical rudder with the rigid section and the flexible section, active control and passive control can be combined, and the vertical rudder is provided with a rigid rotating part and a flexible passive deformation part in the working process of the underwater vehicle, so that the rudder force of a control surface is greatly improved, and the stall angle of the rudder is greatly reduced; therefore, the maneuvering performance of the underwater vehicle is improved.

An aircraft having a hybrid power source includes horizontal drive thrusters powered by an electric motor and forming a horizontal drive unit, vertical take-off / landing rotors forming with electric motors and a corresponding stored electrical energy source a vertical drive unit comprising an electric power supply bus, power generation sources connected to the electric power supply buses and by an input of a vertical drive unit and to each horizontal drive unit via an output of each vertical drive unit. The electric power supply controller emits a power command to the power generation source according to power requirements of the vertical and / or horizontal drive units. The stored electrical energy sources supply electricity according to the difference between the power requirements of the vertical and / or horizontal drive units. The power generation source recharges the stored electrical energy sources, so that the stored electrical energy sources are passively controlled.

The invention discloses an intelligent hydraulic interconnected suspension system and a control method thereof, and belongs to the technical field of vehicle suspensions.The intelligent hydraulic interconnected suspension system comprises a hydraulic assembly, an adjusting assembly and an energy storage assembly, and interconnected hydraulic pipelines of hydraulic cylinders at the four wheel ends of a vehicle are reasonably arranged, matched with an energy accumulator, an adjustable damping valve, a control valve set and an adjusting oil cylinder; passive control, semi-active control and active control of the vehicle can be achieved, so that side-tipping resistance, pitching resistance, vertical resistance, multi-rigidity adjustment, damping stepless adjustment, vehicle body lifting, height adjustment of a front axle and a rear axle of the vehicle, rigidity active regulation and control and rigidity active regulation and control after height regulation and control of the vehicle are achieved, and the overall structure is simple and convenient to debug and maintain.

The invention relates to a self-energized magnetorheological-variable inerter intelligent damper. The damper comprises a magneto-rheological cavity, a tuning cavity, a motion conversion cavity, a variable inerter cavity and an energy collection cavity which are sequentially connected in the axis direction of the damper and separated through partition plates, and the damper plays a role in stages under different excitations. The working mechanism of the self-energy-supply damper is phased control, dispersed energy harvesting and concentrated energy consumption, namely energy storage of the damper and broadband passive control are achieved under small-amplitude vibration; under large-amplitude vibration, all the cavities play a role together, energy release of the damper and active and passive hybrid control are achieved, and the magneto-rheological cavities can adaptively control the output force of the damper in stages according to the structural vibration condition. Compared with the prior art, the broadband vibration control target of the structure is achieved, the operation energy consumption of the damper can be reduced, and the double benefits of improving the control performance and reducing the operation cost are achieved.

The embodiment of the utility model provides a charger output anti-reverse connection and anti-reverse charging protection device, and belongs to the technical field of charging safety. The charger output anti-reverse connection and anti-reverse charging protection device comprises a relay arranged at the output end of a charger and used for executing connection / disconnection of a charging loop through actuation / disconnection; the relay is connected with a relay control circuit and is used for controlling the relay to be switched on or switched off along with the voltage state of the charging loop; the detection circuit is connected to the charging loop and used for responding to the voltage state of the charging loop; and the charging loop is also connected with the relay control circuit, and transmits the voltage state to a relay driving module of the relay control circuit in real time. According to the scheme of the utility model, complicated signal judgment is not needed, passive control is realized only by depending on the voltage state, the system complexity is reduced, the protection on the charger and the battery is enhanced, and the service life of equipment is prolonged.

The application discloses an experimental device containing a uniform distribution gyro truss structure, which comprises a first connecting piece, a first rod, a rotor, a brushless motor, a motor connecting plate and a truss fixing plate. The first connecting piece and the second connecting piece are both assembled into the end face of the free end of the gyro truss structure through interference fit with the first rod, the second rod and the third rod. The four interface nodes of the first connecting piece and the second connecting piece are connected respectively. The third connecting piece and the fourth connecting piece are assembled into the gyro truss unit through interference fit with the first rod, the second rod and the third rod for multiple times. Each gyro truss unit is connected into the main body structure of the truss in the form of module. The brushless motor adds angular momentum to the truss structure. The vibration of the truss is suppressed through the uniform distribution gyro truss structure, which belongs to passive control. Compared with the PID control mode, the application has the advantages of quick reaction, low cost and fast effect.

The present invention discloses a wing noise control device and control method based on jet-coupled serrations. The device is based on a passive wing noise control structure formed by a serration group located at the trailing edge of the wing, and an active wing noise control structure is arranged in the wing cavity. The active wing noise control structure is an active air path control structure, in which an air pipe is arranged in the wing cavity, one end of the air pipe is connected to the hollow serrations in the serration group, and the other end of the air pipe is connected to an external air source. The external air source introduces airflow into the hollow serrations in the serration group through the air pipe, and uses the tip holes and root holes of the serrations as jet holes, forming a one-to-one correspondence between the tip jet and the root jet, thereby achieving active wing noise control. Compared with a single active or passive control method, the present invention can achieve more significant noise reduction effects across the entire frequency range and under all operating conditions, further improving the acoustic performance of the wing, while also having lower energy consumption, high reliability, and simple operation.

The invention discloses a mechanical self-adaptive porous valve for passively controlling automatic accumulation and release of bubbles, and belongs to a fluid control technology in the field of bubble energy collection. In order to solve the problem that bubble potential energy is difficult to collect due to the fact that the flux of bubbles released from the seabed is too low, the invention discloses a mechanical self-adaptive porous valve which structurally comprises an upper gas-liquid mixing cavity, a middle porous plate and a lower gas storage chamber. When gas is accumulated in the gas storage chamber below the perforated plate, the bent gas-liquid interfaces protruding upwards in the tiny through holes of the perforated plate can automatically deform along with accumulation of the gas by means of the surface tension effect of liquid, self-adaptive changing Laplace pressure is provided to resist bubble buoyancy, and therefore automatic accumulation of bubbles below the perforated valve is achieved. And after gas accumulation reaches a threshold value, the gas is instantaneously released through the high-permeability porous plate. The instantaneous air inlet rate of the energy collection device can be remarkably increased, and therefore the efficiency of bubble energy collection power generation is improved.

A jacket assembly 100 is provided for attachment to a subsea flexible line for facilitating passive control of movement of the flexible line. The jacket assembly comprises a plurality of jackets (FIG

The present invention proposes a low voltage ride-through control method and system for a grid-type distributed photovoltaic inverter, which relates to the field of power electronics technology. Based on the electrical quantity parameters of the grid-type distributed photovoltaic inverter, the virtual voltage, active power, and reactive power reference values are adaptively adjusted; a virtual current value is calculated based on the virtual voltage, active power, and reactive power reference values through a voltage source virtual synchronous machine; Euler-Lagrangian modeling is performed on the voltage source virtual synchronous machine, and an improved passive controller is constructed to track the virtual current value and a given negative sequence current value to obtain a modulation wave; a drive signal is generated according to the modulation wave to control the operation of the grid-type distributed photovoltaic inverter; the present invention proposes a control method for a grid-type distributed photovoltaic inverter with high anti-interference and fast response, which takes the advantages of virtual synchronous machine control and passive control while avoiding their disadvantages, so that the grid-type inverter has a certain inertia damping characteristic while also having a fast low voltage ride-through capability.

The invention discloses a power cost control active-to-passive control conversion circuit, a converter and a wiring method, and relates to the technical field of power cost control. The control conversion circuit comprises an analog-to-digital conversion unit, an isolation unit, a delay unit, a trigger unit and an output unit, the control conversion circuit is connected in series in a control loop between the intelligent electric energy meter and the circuit breaker, and an alternating current control signal sent by the intelligent electric energy meter is converted into a passive contact to be output through the control conversion circuit. Therefore, switching-on and switching-off control of the circuit breaker is realized, and the problems that a protection device cannot be additionally arranged in an active output mode and cost control of a simple circuit breaker containing high-supply and low-metering users cannot be realized are solved.

The invention discloses a conveyor control method, which comprises the following steps: determining cost indication information, the cost indication information comprising corresponding relations between operation cost unit prices of N dimensions of a conveyor and time; obtaining a first data set, wherein the first data set comprises a value corresponding relation between the operation information of the conveyor and time and / or a value corresponding relation between different operation information of the conveyor; determining M kinds of time arrangement information of the conveyor, wherein the time arrangement information is used for indicating transportation arrangement conditions of the conveyor at different times; and according to the cost indication information, the target total transportation amount of the conveyor and the first data set, determining target time arrangement information in the M kinds of time arrangement information. In this way, the operation of the conveyor is controlled according to the target time arrangement information determined in advance, and the control cost of the conveyor can be effectively reduced. And moreover, the problems of uncontrollable cost and higher cost caused by temporary regulation and control are effectively avoided, and the defect of low cost response speed of passive control is overcome.