20 results about "Dual loop control" patented technology

The invention relates to the technical field of spraying control, in particular to an anti-corrosion steel pipe inner spraying track self-adaptive control system based on multi-sensor fusion. The feed-forward prediction module generates a feed-forward correction signal through a model compensator and a self-adaptive compensator and predicts and compensates system errors, the feedback control module comprises a track generator and a disturbance observer, a feedback control instruction is generated by comparing a correction track with an original track, an execution mechanism is dynamically adjusted, and the system error is predicted and compensated. The signal driving module adopts a frequency domain decoupling fusion technology, combines a feedforward correction signal and a feedback control instruction, generates a composite control instruction, and ensures the accuracy of trajectory tracking control. According to the invention, through a double-loop control architecture combining feedforward prediction and feedback disturbance suppression, high-precision and strong-robustness self-adaptive control of a spraying track under a complex working condition is realized.

The invention provides a heat-supplementing-free hydraulic compression carbon dioxide energy storage system and an energy charging and discharging circulating method.The energy charging and discharging circulating method comprises the steps that in the energy storage process, gaseous carbon dioxide is firstly subjected to adiabatic compression and then subjected to isothermal compression to obtain saturated liquid carbon dioxide, and in the energy discharging process, the liquid carbon dioxide is firstly subjected to adiabatic expansion and then subjected to isothermal compression to obtain saturated liquid carbon dioxide; isothermal expansion pushes a water impact turbine to do work for power generation; according to the characteristics of hydraulic compression carbon dioxide energy storage, an adiabatic compression-isothermal compression-adiabatic expansion-isothermal expansion energy charging and releasing thermodynamic process is provided, waste heat released in the energy storage process is fully utilized, and the circulation efficiency of the system is improved; the invention provides a double-loop control system for controlling the circulating water flow through carbon dioxide temperature feedback and controlling the power of a water feeding pump / a water turbine through carbon dioxide pressure feedback, and it is guaranteed that the actual circulating process can be conducted according to a design curve; through thermodynamic optimization of the energy charging and releasing process, heat in the energy storage process can be fully recycled, and external heat compensation is not needed.

1. The name of the design product: mine double loop controller. 2. The use of the design product: for industrial automation control and system stability. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view.

The present application relates to the technical field of vehicle power output and electric energy conversion, and particularly relates to a kind of automobile hydraulic power generation system and control method, system includes power take-off module, hydraulic power module, power generation module, energy storage module, control module.The present application introduces adjustable energy conversion link consisting of hydraulic pump and hydraulic motor between vehicle power take-off interface and generator, realizes flexible decoupling and reconstruction of mechanical power, reduces the direct influence of engine operating condition fluctuation on generator speed, thereby significantly improves output frequency and voltage stability, on this basis, constructs double-loop control mechanism with generator speed stability as target and hydraulic circuit pressure as constraint, and adopts hierarchical control strategy of preferentially regulating hydraulic motor displacement, regulating hydraulic pump flow after displacement is limited, effectively shortens speed recovery time, suppresses pressure surge, reduces energy loss, improves overall control efficiency and operating stability of system.

The invention relates to a double-loop control method and system for medium-frequency induction heating of a semiconductor liquid source, and belongs to the technical field of semiconductor manufacturing configuration equipment. The method comprises the steps that the medium-frequency induction electric frequency is obtained, the resonant frequency is synchronously adjusted, and a liquid source heating control basis is provided; constructing a temperature-pressure double-loop feedback curve, dynamically adjusting the inversion output power through a proportional-integral algorithm, and controlling the amplitude and distribution of the medium-frequency induction heating current; through a differential serial communication protocol, the signals are transmitted to the flexible heating coil through a twisted-pair shielded wire and a differential signal interface, and the liquid source is heated by the induction eddy current; and controlling the temperature of the induced eddy current heat source based on a fanless cooling scheme, adjusting the cooling intensity by associating the medium-frequency induced electric frequency, and executing power limitation when the load impedance is abnormal based on built-in safety interlocking logic when the liquid source temperature is monitored to deviate from a preset safety cooling temperature interval.

The invention discloses an online equipment double-control heating system, and relates to the technical field of online treatment of molten aluminum, the online equipment double-control heating system comprises a central processing module, and a double-target setting unit, a double-loop control unit, a power arbitration module and a dynamic temperature difference monitoring unit are integrated in the central processing module; and the temperature monitoring module is in communication connection with the central processing module, and the temperature monitoring module comprises an atmosphere detection unit and a molten aluminum detection unit. According to the application, the double-loop control is combined with a power arbitration maximization principle, the temperature change can be quickly responded, the energy distribution is optimized from the global perspective, the most urgent heating requirement is preferentially met, the temperature rise efficiency and the overall energy efficiency are improved, the excessive temperature difference between the molten aluminum and the atmosphere can be actively intervened and forcibly reduced by a dynamic temperature difference monitoring and suppression strategy, and the energy consumption is reduced. And the process risks such as aluminum liquid condensation or local overheating are effectively prevented, the product quality of degassing and filtering effects and the equipment safety are fundamentally guaranteed, and the system has high reliability.

The application discloses a control method of a tiltable three-rotor unmanned aerial vehicle, and relates to the technical field of unmanned aerial vehicles. The control method comprises the following steps: acquiring real-time state data of the unmanned aerial vehicle; acquiring a task instruction of the unmanned aerial vehicle; performing double-loop control calculation based on the real-time state data and the task instruction to generate a pseudo control instruction; and performing control distribution calculation based on the pseudo control instruction to generate a motor throttle and a rudder deflection angle instruction of the three-rotor unmanned aerial vehicle. The control method generates the motor throttle and the rudder deflection angle instruction of the three-rotor unmanned aerial vehicle through distribution calculation after double-loop control calculation based on state data and a task instruction, realizes decoupling of pitch attitude control and forward flight control and a control mode of fixed-inclination forward flight of the unmanned aerial vehicle, and solves the problem of single control mode and limited adjustment effect of a conventional multi-rotor unmanned aerial vehicle flight control method.

The invention discloses a floating eagle type wave power generation device adopting hybrid power positioning and a control method, and belongs to the technical field of renewable energy utilization. The device comprises a main body, a turret-type single-point mooring system and an auxiliary power positioning system, wherein the main body comprises a semi-submersible platform, an eagle-type wave-absorbing floater connected with the platform through a hinge and an energy conversion system; the mooring system is arranged on a platform bow, and the auxiliary system comprises a propeller at the bottom of a platform stern stand column. According to the control method, the target heading is determined through the sensor collecting position, heading and wave direction, the mooring system is preliminarily positioned by means of the weather vane effect, the auxiliary system is controlled through a low-frequency motion model, an LQR controller, thrust distribution optimization and double-loop PID, the heading is accurately adjusted, drifting is restrained, and low-power-consumption operation is conducted when deviation is small.

This application relates to a novel intake and exhaust system for diesel engines and its control method. The intake and exhaust system includes an intake system, an exhaust system, and a control system. This system improves upon existing diesel engine intake and exhaust systems by installing an intake pressure sensor between the intercooler and the intake manifold in the intake system, and connecting an exhaust bypass valve to the exhaust manifold in the exhaust system. A solenoid valve and a mechanical pressure relief valve are connected in parallel to the exhaust bypass valve. The control system controls the opening degree of the solenoid valve based on the pressure signal. This system uses exhaust gas energy to drive turbocharging as its core, and combines electronic and mechanical dual-loop control to achieve dynamic balance of intake pressure. It can be widely applied to the intake and exhaust systems of diesel engines.

The invention provides an interleaved parallel single-stage high-frequency link resonant rectifier with a CCM mode, and relates to the field of power electronics. The topological structure is realized by integrating two stages of converters, namely an interleaved boost PFC rectifier and a high-frequency link resonant DC-DC converter, into a single-stage architecture. After the power conversion process is simplified, the pulsating high-frequency voltage from the PFC sub-stage can be directly fed into the Lr-Cr resonant resonator. By reducing the number of active switching elements, the integrated design significantly improves the energy efficiency and operational stability of the converter. Different from a traditional single-stage converter which usually adopts a high-current-ripple discontinuous conduction mode, the invention develops a double-loop control strategy comprising an inner current control loop and an outer voltage regulation loop, ensures interleaved parallel CCM operation so as to enhance electromagnetic interference performance, and at the same time maintains stable voltage output. In addition, zero-voltage switching of the power switch is achieved through the Lr-Cr resonant resonator, and the switching loss is further reduced.

The application relates to the technical field of data processing, and discloses a motor controller research and development method and system based on an intelligent algorithm. The method comprises the following steps: after parameter identification of a motor, PID parameters are optimized by using an adaptive differential evolution algorithm; a double-loop control structure is constructed by using optimal PID parameters; a virtual sensor is designed based on the optimized double-loop structure, and a health index is obtained; a fusion speed signal is obtained by fusing multiple source signals; a backstepping sliding mode controller is realized according to the fusion speed signal, and system verification is completed. By fusing multiple intelligent algorithms and virtual sensor technologies, a motor control system with high fault tolerance is constructed, so that even in the case of sensor abnormality or failure, the basic operation performance of the motor can be maintained, and the reliability and safety of the system are improved.

This invention relates to the field of wastewater treatment technology, specifically to a dual-loop control method for aerobic space-aeration based on the nitrification process in wastewater treatment, constructing a dual loop of "on-demand aeration" and "on-demand aerobic" aeration. In the aeration loop, a SAD (Self-Aeration Optimization) method is proposed. n The indicator integrates deep learning feedforward prediction and PID feedback correction with dead zone to precisely control aeration rate directly with ammonia nitrogen removal as the target; in the aerobic space loop, a SAD is established. n A U-shaped curve correlation model with aeration intensity is used to solve for the economic aeration intensity through a neural network, and the optimal aerobic zone volume is dynamically calculated in conjunction with the target aeration rate. The two loops are decoupled and coordinated based on the nitrification process, ensuring the aeration system always operates at its optimal energy efficiency point. This invention achieves in-situ, zero-delay, and precise control of the biological nitrification process. While ensuring stable compliance with effluent ammonia nitrogen standards, it significantly reduces aeration energy consumption and the unit consumption of added carbon sources, improves total nitrogen removal rate, and achieves energy saving, consumption reduction, and quality improvement in wastewater treatment.

The application relates to a semiconductor liquid source intermediate frequency induction heating double-loop control method and system, and belongs to the technical field of semiconductor manufacturing configuration equipment. The method comprises the following steps: acquiring an intermediate frequency induction electric frequency, synchronously adjusting a resonance frequency, and providing liquid source heating control basis; constructing a temperature-pressure double-loop feedback curve, dynamically adjusting inverter output power through a proportional integral algorithm, and controlling the amplitude and distribution of the intermediate frequency induction heating current; the differential serial communication protocol is transmitted to a flexible heating coil through a twisted shielded wire and a differential signal interface, an induced eddy current heating liquid source is heated, the temperature of the induced eddy current heat source is controlled based on a fan-free cooling scheme, the cooling intensity is adjusted in association with the intermediate frequency induction electric frequency, and when it is monitored that the liquid source temperature deviates from a preset safe cooling temperature interval, power limitation is executed based on built-in safety interlocking logic when the load impedance is abnormal.

The invention discloses a medium filling control method for a mobile heat supply vehicle, and belongs to the crossing field of heat energy engineering and automatic control, and the method comprises the following steps: obtaining related parameters of a medium container of the mobile heat supply vehicle; generating a temperature reference track as a target reference of inner ring temperature rise rate control; double-loop cooperative control is conducted till the medium container is filled to the designed water level and the designed pressure, the double-loop cooperative control comprises inner-loop energy control and outer-loop liquid level control, the inner-loop energy control is based on the law of conservation of energy, the heat requirement is met by adjusting the steam mass flow, and the stable heating rate is ensured; the outer ring liquid level control is based on the law of conservation of mass, and accurate liquid level adjustment is achieved by adjusting the water replenishing mass flow and restraining the water flow change rate at the same time. Through fusion of a mechanism model and double-loop control, an accurate, efficient and safe intelligent solution is provided for filling of the mobile heat supply vehicle, and thermotechnical control is promoted to be upgraded from experience driving to model driving.

This invention discloses a dual-phase-change coupled intelligent control method and system for battery immersion cooling, relating to the field of intelligent battery cooling technology. The dual-phase-change coupled intelligent control method and system includes: S1, collecting and preprocessing temperature data and operational characteristic data to construct a standardized thermal state dataset; S2, evaluating the stability of the boiling state and dynamically adjusting the local channel liquid supply rhythm; S3, analyzing the melt state of the composite phase change material's melt coverage and driving changes in the auxiliary condenser's start-stop strategy; and S4, constructing a main-auxiliary dual-loop control structure to adjust the operating intensity of the main circulation pump and the bidirectional pump in real time. This solves the problem that existing liquid cooling systems have limited sensible heat capacity and uncontrolled boiling phase change processes when facing high-frequency, high-rate charge-discharge cycles, making it difficult to achieve precise peak-shaving control of heat in the core battery region.

The invention relates to the technical field of vehicle safety, and discloses a safety verification method based on upgrading of a double-loop controller of a new energy vehicle, and the method comprises the steps: triggering a safety upgrading process when any vehicle controller serves as a to-be-upgraded main controller, and receiving an upgrading instruction; the main controller and a pre-configured monitoring controller corresponding to the main controller carry out progressive interaction security verification on the upgrading instruction; after the progressive interaction security verification is passed, the main controller autonomously writes new firmware into a firmware storage area of the main controller so as to finish upgrading; and the monitoring controller carries out dynamic monitoring intervention on the upgrading process of the main controller and cooperates with function verification of the main controller. According to the invention, the method focuses on the safety guarantee of the firmware upgrading process, and achieves the distributed, high-reliability and deep-cooperation safety upgrading of the new energy vehicle under the architecture of the double-loop controllers through the architecture innovation and the dynamic interaction and verification between the double-loop controllers.

The invention discloses a guide vane and power angle double-loop cooperative feedback control method for a one-pipe multi-machine hydroelectric system, and relates to the technical field of hydroelectric generating set control, and the method comprises the steps: S1, constructing a nonlinear model under one-pipe multi-machine elastic water attack, and selecting the guide vane opening degree and the power angle as double-loop control objects; s2, a double-loop control object is introduced into the original guide vane and power angle control model to serve as an additional negative feedback item, and a double-loop cooperative feedback control model is obtained; s3, introducing a cooperative control theory, respectively selecting guide vane opening degrees and power angles of a plurality of units to form a guide vane control macro-variable and a power angle control macro-variable, and respectively deriving; and S4, respectively substituting the guide vane control macro-variable, the derivative of the guide vane control macro-variable, the power angle control macro-variable and the derivative of the power angle control macro-variable into the cooperative control convergence manifold to obtain a guide vane and power angle control law, namely an additional negative feedback item, so as to realize system control. Connection of multiple units is established, timely feedback of changes of the guide vanes and the power angles of the units is achieved in a double-loop mode, and the control effect is better.

The invention discloses a multi-rotor unmanned aerial vehicle image guidance interception method based on a single-axis holder, and aims to design a multi-rotor guidance law in combination with image information and realize guidance law tracking by adopting a double-loop PID (Proportion Integration Differentiation) controller. The system cost can be greatly reduced, and the system weight is effectively reduced; in the tracking process, the expected course is kept unchanged all the time, tracking errors are controlled by adjusting the transverse position speed, the system response speed is increased, and the phenomenon that the target loses lock and the like due to the fact that large course angle expected change is generated due to rapid change of the target in an image during tail end guidance is avoided; in addition, when the target is tracked, the position change of the target in the image is considered all the time, it is guaranteed that no large transverse position deviation is generated in the whole tracking process, and the terminal guidance interception precision can be effectively improved.

The application discloses a guide vane and power angle double-loop coordinated feedback control method of one-pipe multi-machine hydroelectric system, relates to the technical field of hydroelectric unit control, and comprises the following steps: S1, a nonlinear model under the elasticity of water hammer of one-pipe multi-machine is constructed, and a guide vane opening degree and a power angle are selected as double-loop control objects; S2, the double-loop control objects are introduced into original guide vane and power angle control models as additional negative feedback items to obtain a double-loop coordinated feedback control model; S3, a coordinated control theory is introduced, a plurality of guide vane opening degrees and power angles of the multiple units are selected to form guide vane control macro variables and power angle control macro variables respectively, and derivatives are calculated respectively; and S4, the guide vane control macro variables and the derivatives, the power angle control macro variables and the derivatives are substituted into a coordinated control convergence flow field respectively to obtain guide vane and power angle control laws, namely additional negative feedback items, and system control is realized. The application establishes the connection of the multiple units, realizes the timely feedback of the guide vane and power angle changes of the units through the double-loop form, and makes the control effect more optimal.

The invention discloses a vehicle electric steering gear assembly, a vehicle steering system and a vehicle, and relates to the technical field of vehicle electric steering, and the vehicle electric steering gear assembly comprises a shell, an input assembly, a power assisting assembly, a gear set transmission pair and a lead screw pair; the input end of the input assembly is used for being connected with an external steering transmission mechanism. The power assisting assembly comprises a double-winding motor, a planetary gear transmission pair and a double-loop controller. The output end of the double-winding motor is in transmission connection with the input end of the planetary gear transmission pair, and the double-loop controller is used for receiving an instruction of a vehicle center control so as to control the double-winding motor to drive; the input end of the gear set transmission pair is in transmission connection with the output end of the input assembly and the output end of the planetary gear transmission pair. The input end of the lead screw pair is in transmission connection with the output end of the gear set transmission pair, and the output end of the lead screw pair is in transmission connection with the steering straight pull rod. According to the vehicle electric steering gear assembly, the steering efficiency can be improved, the service life can be prolonged, and the safety level can be improved.