313 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 high-voltage power grid voltage quality compensation method based on a passive control strategy, and relates to the technical field of power grid voltage control, and the method comprises the steps: reading the data of an energy recovery type passive control system, and constructing a digital twinborn model; performing control fitting evaluation based on a twinborn model, distributing monitoring sensors and establishing mapping in the model; establishing time sequence monitoring data through a monitoring sensor, synchronizing the time sequence monitoring data to a short-term power grid state prediction network in the twin model, and establishing a prediction data set; analyzing the automatic compensation strategy, performing regulation analysis on the dynamic voltage regulator, and establishing a regulation data set; acquiring energy storage data, and establishing a compensation objective function; and inputting the prediction data set, the adjustment data set, the time sequence monitoring data and the energy storage data into the compensation objective function, executing control optimization, and performing power grid voltage quality compensation. Therefore, the technical effects of simple control, control cost reduction and compensation response efficiency improvement are achieved.

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 discloses an active and passive control method for inhibiting shock wave buffeting of a sweepback wing, and belongs to the field of aircraft flow active and passive cooperative control. The method comprises the following steps: establishing a numerical simulation geometric model of the sweepback wing and an active and passive cooperative control law design model of the sweepback wing; and performing flow field state analysis by combining with a sweepback wing transonic speed buffeting flow field solver, training the sweepback wing active and passive cooperative control law design model to obtain an optimal sweepback wing active and passive cooperative control law design model, and performing active and passive control on the sweepback wing to complete suppression of shock wave buffeting of the sweepback wing. An active and passive cooperative control thought is adopted, the lift pulsation amplitude is effectively reduced through mutual cooperation of an active control device and a passive control device, meanwhile, deep reinforcement learning control is adopted, and the sweepback wing shock wave buffeting phenomenon can be eliminated in the flowing state within a certain range.

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 provides a semi-active tuned mass damper based on an intelligent material. The semi-active tuned mass damper comprises 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, and the intelligent control part controls the first-stage vibration reduction part, the second-stage vibration reduction part and the health monitoring part in a unified mode; according to the tuned mass damper, bidirectional vibration control of a building structure can be achieved, the vibration response of the tuned mass damper and a main structure is monitored in real time, and semi-active control over an intelligent material is started after data are collected and analyzed through a computer control system.

The invention provides a self-adaptive tuned mass damper capable of intelligently switching active, semi-active and passive control, which comprises a damper passive control part, a servo control part, an active control part, a semi-active control part and a health monitoring part, and is characterized in that the servo control part uniformly controls the active control part, the semi-active control part and the health monitoring part; the two-way vibration control of the structure is realized through smooth two-way sliding of the friction pendulum support in a plane; the jack is used for providing active control force for the friction pendulum support so as to ensure that the mass block can slide under tiny wind vibration to start working, and the overlarge stroke of the mass block under extreme disasters can be controlled; the relative movement between the damping steel plate and the damping liquid in the damping groove is used for providing bidirectional damping force; the accurate instantaneous vibration frequency of the damper is ensured through variable stiffness control, and the bidirectional vibration reduction effect of the damper is improved; the health monitoring part stores, transmits and analyzes real-time vibration signals in real time so as to ensure normal work and safety of the structure.

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.

The invention belongs to the technical field of bridges, and particularly provides a bridge vortex-induced vibration control device and a bridge. The bridge vortex-induced vibration control device comprises a guide rail, a moving platform, a web, a first driving mechanism, a bottom plate and a second driving mechanism, the moving platform can move in the length direction of the guide rail, the first driving mechanism can adjust the inclination angle of the web, and the second driving mechanism can adjust the inclination angle of the bottom plate. The position of the movable platform and the inclination angles of the web and the bottom plate can be adjusted according to the change condition of the wind environment, so that the flow path of wind is effectively optimized, and the direct impact of wind load on a bridge is reduced. The bridge vortex-induced vibration control device overcomes the limitation caused by the fact that a traditional passive control measure depends on a fixed structure design, the flexibility and adaptability of the control effect of the bridge vortex-induced vibration control device are improved, and it is ensured that the bridge vortex-induced vibration control device can play the best effect under the conditions of different wind speeds and wind directions.

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 provides a direct-current micro-grid passive model prediction control method based on predefined time feed-forward compensation. The design process of the control method specifically comprises the following steps of: firstly, performing online estimation and feed-forward compensation on external interference by designing a predefined time nonlinear disturbance observer, so that the robustness of the system is remarkably improved; in order to obtain the optimal control structure, system parameters are estimated online instead of strictly assumed interference signals. Then, an adaptive passive model predictive control (APMPC) composed of a passive control voltage loop and a model predictive control current loop is designed, and the adaptive passive model predictive control (APMPC) has the advantages of simple structure, high robustness, rapid voltage regulation and the like. In addition, before the model predicts and controls the current loop, simple current limiting can be realized through a saturation current limiting link. The predefined time disturbance observer provided by the invention ensures that the error signal converges in the freely set time upper limit.

The invention provides a layered passive whole-body compliant control method for a multi-branch spacecraft. The method is a spacecraft whole-body control method combining a cooperative control theory, a layered control theory, a passive control theory and an impedance control theory. The system has the advantages that multi-stage compatible control of end effector compliant contact and whole body configuration maintenance can be achieved, a self-adaptive variable impedance control strategy is introduced into an end compliant control layer, the problem of safe compliant contact with a target is solved, meanwhile, a system passive compensation controller based on an energy tank is embedded into each control layer, and the system passive compensation control is more stable. And the safety and stability of the system operation process can be ensured.

The invention relates to an impact reduction protection structure for a space camera explosive bolt unlocking device, belongs to the technical field of space optical remote sensing, and solves the problem that an existing space camera explosive bolt unlocking device cannot give consideration to impact load, explosive bolt unlocking reliability and overall dynamic rigidity of a space camera. The structure mainly comprises an explosive bolt force transmission path passive control assembly, an adjustable elastic impact reduction assembly and a medium-high frequency impact response attenuation assembly. The explosive bolt top end protection cover and the explosive bolt tail end protection cover are arranged on the explosive bolt in a sleeving mode, and the high-K-value laminated spring arranged in the explosive bolt top end protection cover and the medium-high frequency impact response attenuation assembly arranged on the top of the explosive bolt top end protection cover are combined, so that energy generated when the explosive bolt is unlocked can be effectively absorbed; the influence of medium-high frequency impact response generated when the explosive bolt is separated on the space camera is reduced, meanwhile, the unlocking reliability of the explosive bolt and the dynamic rigidity of the space camera are guaranteed, and the applicability is high.

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 a method for restraining flow separation of a boundary layer on the surface of a turbine blade of an aero-engine. The method aims at solving some problems existing in an existing traditional scheme for controlling flow of a turbine of the aero-engine. Flow control is divided into active control and passive control, and a traditional passive control scheme is not flexible enough and has high dependence on flow conditions of a turbine. And an unsteady flowing environment effect is difficult to guarantee. An active control means needs input of external energy and a corresponding control loop, and is complex to realize and high in cost. Aiming at the actual condition that a blade of a high-load low-pressure turbine is objectively vibrated, a certain vibration frequency is directly applied or the original vibration condition is changed so as to avoid a certain frequency or ensure that the vibration frequency of the blade is within a certain safe and flow-beneficial interval; the flow separation on the surface of the turbine blade can be inhibited, so that the turbulence pulsation level in the separation and transition process is reduced or delayed, the total pressure loss is reduced, and the aerodynamic performance of the low-pressure turbine is improved.