61 results about "Usual control" patented technology

The invention is suitable for the technical field of power electronics and power transmission, and provides a low voltage ride-through control method and system for a network construction type converter, and the method comprises the steps: carrying out the conventional VSG control according to a VSG control strategy, and continuously monitoring the difference between the voltage of a power grid and a set reference value, so as to judge whether a fault occurs or not; when it is detected that the power grid breaks down, homodyne control is carried out on an active power control ring and a reactive power control ring of the grid-forming type converter so as to fix the phase and the amplitude of the output voltage of the converter; calculating and injecting a positive sequence compensation voltage and a negative sequence compensation voltage according to the drop degree of the power grid voltage; and according to the predicted impact current value, dynamically calculating and inputting adaptive virtual impedance. The power angle and the voltage in the fault period can be ensured to be stable, transient overcurrent is effectively restrained, and large power fluctuation is not caused.

The invention relates to the technical field of vehicle control, and discloses a VCU torque control system based on multi-sensor fusion, and the VCU torque control system comprises a system monitoring and fault diagnosis module which is used for generating a sensor failure mark when a yaw velocity sensor is diagnosed to be failed; and the data acquisition and preprocessing module is used for receiving the sensor failure mark generated by the system monitoring and fault diagnosis module and acquiring real-time data of the health sensor so as to generate a real-time feature vector. A Gaussian process regression state observer and random model predictive controller fusion scheme is adopted, state perception uncertainty information is transmitted to a control decision-making layer, and the problem that in the prior art, when a deterministic state observer is cascaded with a conventional controller, the controller cannot perceive the upstream state estimation quality, and the control accuracy is poor is solved. And the system is unstable or the performance is reduced due to over-excitation control when the estimation is inaccurate.

The invention provides a TBCC engine adaptive mode conversion control plan design method suitable for a wide envelope, and the method comprises the steps: designing single-point mode conversion control plans at a plurality of typical fan inlet temperatures in a mode conversion window, and carrying out the adaptive obtaining of a mode conversion plan suitable for the current fan inlet total temperature through linear interpolation; on the basis of the isotherm similar conversion theory, for envelope points with the same fan inlet temperature, it is guaranteed that similar conversion parameters of control parameters are consistent, and the envelope points can share the same set of control plans through similar inverse transformation. The control plan designed by the method effectively breaks through the limitation that a conventional control method is only suitable for a single envelope point, the stable and safe mode conversion process can be achieved at each envelope point in the whole mode conversion window, and in the process, the engine does not have the phenomena of over-temperature, over-rotation and surge.

The present application relates to the technical field of smart water and process control, and particularly relates to a double closed loop coagulant intelligent dosing system for waterworks and a control method thereof. The double closed loop intelligent dosing system comprises a multi-modal perception network, an edge intelligent controller, a cloud edge system optimization platform, and a safety execution and alarm unit. The control method thereof is also disclosed. When the model credibility index is higher than a set threshold, model predictive control is adopted. When the index is lower than the threshold, the control is switched to a conventional control scheme. In order to improve the automatic disposal capability for abnormal working conditions, an event-driven closed loop control is set. For abnormal working conditions beyond the conventional working conditions, the abnormal working condition disposal rule control is switched, so as to form a double closed loop system architecture. The control efficiency of the coagulant intelligent dosing system under normal working conditions can be effectively improved, and the abnormal working conditions can be effectively disposed. The problem of model failure caused by abnormal water inflow and other reasons, which leads to a sharp decline in system performance, can be avoided.

The application discloses an integrated control system, which comprises a conventional control system and a safety protection system arranged on a local rack and N remote IO racks. The conventional control system is connected with an upper computer and comprises a conventional logic control unit, a first conventional communication interface module connected with the conventional logic control unit, N second conventional communication interface modules connected with the first conventional communication interface module, and N conventional IO modules connected with the second conventional communication interface modules; the safety protection system comprises a safety logic control unit connected with the conventional logic control unit, a first safety communication interface module connected with the safety logic control unit, N second safety communication interface modules connected with the first safety communication interface module, and N safety IO modules connected with the second safety communication interface modules. The scheme provides an integrated design scheme of the conventional control system and the safety protection system, so that the overall design cost of the integrated control system is reduced.

The present invention relates to the field of microgrid control technology, and discloses an intelligent cloud-edge collaborative microgrid control system. In a time period before a water pump contactor closing signal is detected, the rate of change of the zero-sequence voltage per unit time is measured at fixed time intervals; the presence of a zero-sequence cross-reverse jump is determined based on the rate of change, and the jump moment of the zero-sequence cross-reverse jump is recorded; a virtual reactance is generated based on the polarity of the rate of change of the zero-sequence cross-reverse jump, and the virtual reactance is injected into the DC bus through an inverter; the presence of a DC negative pulse delayed zero crossing is determined based on the bus current, and the negative pulse energy corresponding to the DC negative pulse delayed zero crossing is estimated; the negative pulse energy is used as a control quantity, combined with a preset phase shift angle, and the control quantity is fed back to the water pump motor according to a preset power curve; after the feedback continues for a preset feedback time, the zero-sequence voltage and the DC bus current are obtained, and when the zero-sequence voltage and the DC bus current return to the normal operating range, the normal control mode is returned.

The utility model provides a water spraying amount control system for a primary high-temperature flue gas spray cooling tower of an electric furnace, relates to the technical field of flue gas purification of the electric furnace, and aims to solve the problem that most of existing projects use a conventional control method for adjusting the water spraying amount according to a single temperature value of an outlet of the spray cooling tower. The problems of slow water spraying reaction (water spraying hysteresis), inaccurate temperature value caused by local supercooling or superheating due to non-uniform flue gas distribution, large temperature fluctuation of an outlet of a spray tower, serious scaling and hardening of smoke dust in the spray tower and a tower outlet pipeline, and increase of use and maintenance cost generally exist in the prior art, including a combustion settling chamber, a combustion chamber, a combustion chamber and a combustion chamber. A flue gas inlet dust removal pipeline is installed at the top of the left side of the combustion settling chamber, a steel structure stand column is installed at the top of the right side of the combustion settling chamber, and a cooling tower is installed on the steel structure stand column through a supporting base.

The application discloses an active damper control method based on oscillation risk assessment, and relates to the technical field of new energy power generation systems.The control method comprises four parts: an inverter conventional control part, an oscillation risk assessment part, a stability margin improvement part and an oscillation monitoring and instability recovery control part.The inverter conventional control part is the basis of the active damper control and runs through the whole control stage, and the other three control parts cyclically act in sequence to ensure the stable operation of the inverter system, assess the oscillation risk of the system through current relation, and thus do not need voltage information, thereby reducing the calculation burden of the controller, improving the stability margin of the system before the system is unstable, and improving the stability margin to a set value.

The invention relates to the technical field of charging piles, and discloses a power module fan rotating speed adjusting method based on fuzzy PID control, and the method comprises the steps: obtaining an air inlet temperature fuzzy value according to a preset air inlet temperature given value and a plurality of detected air inlet temperature real-time values of a power module; quantizing the air inlet temperature fuzzy values to the corresponding fuzzy domains so as to respectively calculate the membership degrees of the air inlet temperature fuzzy values in the respective corresponding fuzzy domains; and determining an incremental proportion coefficient real-time adjusting quantity, an incremental integral coefficient real-time adjusting quantity and an incremental differential coefficient real-time adjusting quantity in an incremental PID control scene according to each membership degree, so as to determine a fan rotating speed adjusting quantity of the power module based on the above. According to the method, the fuzzy PID control mode is combined on the basis of conventional PID control, the influence of internal and external factors on fan conversion control can be effectively reduced, the control precision of the fan rotating speed of the power module is improved, and the fan operation stability of the power module is further improved.

The present invention discloses a digital control system for a three-level DC converter. The digital control system includes a first subtractor, a second subtractor, a third subtractor, a fourth subtractor, a fifth subtractor, a sixth subtractor, a first adder, a first multiplier, a first PI controller, a second PI controller, a third PI controller, a fourth PI controller, a fifth PI controller, a sixth PI controller, a reverse given absolute value calculation module, a minimum value calculation module, a maximum value calculation module, a PWM generator, and a driver. The present invention implements bidirectional automatic switching control in any constant voltage, constant current, or constant power mode; utilizes the high-speed characteristics and parallel computing advantages of FPGAs to achieve rapid dynamic response; the switching time from positive 90% to negative 90% is shorter than that of conventional control methods, and the forward and reverse switching speeds are fast.

Control device for a vehicle, the control device comprising: a regular control unit (10) configured to control a control object (2) to move a vehicle so that the control object is in a predetermined target state; a fallback control unit (22) configured to control the control object by fallback control in which a control function is restricted compared to regular control by the regular control unit in a case where an abnormality occurs in the control of the control object by the regular control unit; a fallback diagnostic unit (30) configured to: (i) to switch the control of the control object to fallback control by the fallback control unit in a case where a predetermined diagnostic condition is satisfied during execution of the regular control by the regular control unit; (ii) to diagnose whether or not the fallback control is being properly executed; and (iii) return to regular control by the regular control unit in a case where the diagnosis is completed; and a diagnostic monitoring unit (32) configured to: (iv) monitor a state of the control object in a case where the fallback diagnosis unit switches the control of the control object to fallback control; and (v) return the control of the control object to regular control by the regular control unit by stopping the diagnosis of the fallback control by the fallback diagnosis unit in a case where the control object deviates from the target state by an allowable value or more.

The invention relates to a cooperative adaptive VSG control method based on virtual inertia and a damping coefficient, and solves the practical problem that conventional VSG control does not fully utilize the configuration flexibility of the virtual inertia and the damping coefficient to enhance the frequency control capability of a system. Comprising the following steps: 1) establishing a transfer function of a VSG control method based on small signal analysis; 2) defining a quantitative coupling relationship between the virtual inertia and the damping coefficient; 3) calculating and determining the value range of the virtual inertia and the damping coefficient; 4) calculating the value of the virtual inertia; 5) calculating a value taking method of a damping coefficient; and 6) determining the collaborative limitation of the virtual inertia and the damping coefficient. According to the method, the frequency difference, the frequency change rate, the internal coupling relation of the virtual inertia and the damping coefficient, the power change amount and other factors are fused, the configuration of the virtual inertia and the damping coefficient is optimized, the frequency fluctuation can be controlled within the specified time and space range under different kinds of load fluctuation working conditions, and the frequency fluctuation can be controlled within the specified time and space range. And the operation stability of the electric energy router is improved.

Conventional control schemes for electrolyzers focus on maximizing electrical efficiency, which describes the relationship between the electrical energy consumed and the gas produced by the electrolyzer. However, the cost associated with high electrical efficiency may be unnecessarily expensive. In one embodiment presented herein, a model is used to determine the cost (or profit) associated with a gas produced by the electrolyzer at each of a plurality of operating conditions. The control system can select the operating condition to use based on which operating condition is associated with the lowest cost (or highest profit), even though that operating condition may not be associated with the highest electrical efficiency.

This invention discloses an electronic expansion valve control method, device, and air conditioning system. The method includes: detecting a change in the on / off state of an indoor unit; for each on-duty indoor unit, determining the degree of lag in indoor unit control based on changes in system operating load and changes in specified parameters when the system load changes; adjusting the control cycle of the indoor electronic expansion valve of that indoor unit according to the lag degree; and controlling the indoor electronic expansion valve of that indoor unit according to the adjusted control cycle. This invention improves the response speed of the indoor electronic expansion valve under system fluctuations, increases the response rate of the indoor unit, avoids the situation where slow adjustment according to the conventional control cycle leads to large indoor temperature fluctuations and reduced indoor comfort, achieves effective regulation of the indoor electronic expansion valve, and solves the problem of slow response of the indoor electronic expansion valve under system fluctuations.

The present application belongs to the technical field of metal material processing control, and particularly relates to a self-adaptive tension regulation method for mirror surface aluminum foil precision forming, comprising the following steps: S1, obtaining full-element working condition data in the mirror surface aluminum foil forming process, the full-element working condition data comprising a feedback tension value, a linear speed and a driving speed of a main driving motor; S2, evaluating a stability confidence index according to the feedback tension value and the linear speed, and distinguishing whether the tension deviation belongs to systematic error or random interference through the stability confidence index; S3, dynamically mapping bandwidth sensitivity based on the stability confidence index and the driving speed. The present application can effectively eliminate high-frequency noise interference, significantly reduce tension fluctuation between multi-stage roller systems, solve the stress wrinkle problem in ultra-thin aluminum foil forming, eliminate overshoot and reciprocating swing in conventional control, and improve mirror surface flatness.

The invention discloses a low-speed and high-precision tracking control method for an unmanned ship, and the method comprises the steps: carrying out the parameter equation expression of a task planning path of the unmanned ship, and selecting a projection point of the unmanned ship on the path based on the path; the curvature and the position deviation are calculated according to the selected projection points, and the foresight distance of the unmanned ship in the track path is selected according to the curvature and the position deviation; coordinates of a guide point are obtained according to the projection point and the foresight distance, and an expected heading value is obtained through calculation; and calculating a navigational speed course control rate and a navigational speed control rate according to the expected navigational speed value and the expected navigational speed, and realizing tracking control of the unmanned ship based on the control rates. Through the designed tracking control method, the navigational speed course control rate and the heading control rate are obtained through calculation, tracking control over the unmanned ship is achieved based on the course control rate and the heading control rate, high-precision tracking control over the unmanned ship in the low-speed state can be achieved, and the unmanned ship tracking control precision is improved. Task requirements of unconventional control scenes such as autonomous navigation in narrow and complex water areas and autonomous berthing in wharf areas are met.

The invention relates to the technical field of magnetic suspension systems, and particularly discloses a magnetic suspension rotor speed control system based on a neural network, which comprises an embedded controller, an instruction unit, a speed unit, an execution unit, a judgment unit and a control unit, the control unit adaptively adjusts PID parameters through a BP neural network, performs speed adjustment and updating in real time, then enters the execution unit for actual execution verification, judges whether to enter the speed unit again through the judgment unit, and performs a new round of execution verification and recursive execution until the judgment unit meets the requirements. The method is applied to the field of magnetic suspension rotor speed control, overcomes the defects that parameters in a conventional PID controller adopted in a control system of a magnetic suspension rotor are difficult to adjust, and the parameters are fixed and are difficult to face a complex time-varying system, automatically sets the parameters of the PID controller by adopting the self-learning capability of a BP neural network, adaptively adjusts the PID parameters, and improves the speed of the magnetic suspension rotor. And the robustness and reliability of the control system are improved.

The application discloses a kind of air pump control method and electronic sphygmomanometer of electronic sphygmomanometer, air pump control method includes steps S1, the battery load voltage when air pump idling is measured, and load voltage is divided into several segments;Step S2, the air pressure in cuff is measured;Step S3, in low pressure section, calculate inflation rate with first frequency and use PID control algorithm to adjust inflation rate;Step S4, in high pressure section, calculate inflation rate with second frequency and use PID control algorithm to adjust inflation rate;Step S5, when the pulse feature extracted from air pressure signal meets the requirement of calculating blood pressure, end measurement and display result;Through the above structure, the problem that conventional PID control algorithm converges slowly when controlling air pump inflation can be solved, and the same cuff can make air pressure rise at a relatively stable rate under different wearing tightness, and the requirement of hardware configuration is lower.

Provided is a control device for an internal combustion engine that suppresses an excessive decrease in the temperature of the top surface of a piston by means of incremental control in which the injection amount is greater than that of conventional control for oil control. The control device controls oil control based on the oil injector. When the water content is equal to or greater than a first threshold (S13: YES) and the piston temperature is equal to or greater than a first temperature (S14: YES) and the fuel rate is equal to or greater than a second threshold (S16: YES) and the piston temperature is equal to or greater than a second temperature (S17: YES), the control device performs incremental control of the oil control in step S15 if the specific control is not being executed (S11: YES). When the specific control is being executed (S11: YES), the control device does not perform the increment control of the oil control regardless of the moisture content and the fuel rate.

The invention discloses an integrated controller of a composite robot. The integrated controller comprises a main control unit and an independent heterogeneous safety module which are integrated on the same hardware platform, the main control unit runs on a processor with real-time scheduling capability and is used for integrating sensing, planning and control logic of the mechanical arm and the chassis; the heterogeneous security module adopts a processor with a structure different from that of the main control unit and is used for independently executing security monitoring and protection functions; the main control unit and the heterogeneous security module realize data interaction through a physically isolated communication link, and security control logic and conventional control logic are separately deployed, so that the security response capability, task cooperation efficiency and system robustness of the composite robot in a complex industrial environment are improved.

The invention discloses a steering stability control method and device for an electric control handle of a loading machine, and belongs to the technical field of engineering machine.The control method comprises the steps that in response to an obtained steering signal of the electric control handle, the rotating speed of a steering gear pump and the rotating angle of a whole vehicle angle sensor are obtained; calculating a dynamic deceleration interval according to the rotating speed, and judging whether the rotating angle is in the dynamic deceleration interval or not; and if the rotating angle is within the dynamic deceleration interval, steering buffer control is carried out according to the rotating angle, and otherwise, conventional steering control is carried out according to the steering signal. Meanwhile, the signal end and the execution end of the control method are both subjected to two-way redundancy setting. The invention can effectively solve the problems of small steering interval of the handle, limit impact, signal failure in severe environment and the like, and improves the steering safety and comfort of the loader.

The embodiment of the invention provides a method and device for coordinating sideslip of an aircraft through a control law, computer equipment and a medium, and the method comprises the following steps: setting an activation condition and an exit condition, continuously monitoring sideslip angle data in flight data through an aircraft sensor, and activating an operation for coordinating sideslip of the aircraft; the method comprises the following steps: determining a coordinated sideslip gain of a rudder according to flight data collected by an aircraft sensor, determining a rudder control instruction according to the coordinated sideslip gain of the rudder, and controlling the motion of the rudder of an aircraft based on the rudder control instruction; the coordinated sideslip gain of the aileron is determined, an aileron control instruction is determined according to the coordinated sideslip gain of the aileron, the aileron is controlled to deflect through the aileron control instruction, and the roll angle is corrected; and after a quit condition is met, quitting the operation of coordinating sideslip of the airplane, and controlling the airplane through a conventional control law. According to the scheme, by outputting the rudder and aileron control instruction for coordinating sideslip, the flight safety is improved.

This invention provides a technology that improves the work efficiency of operators in a vehicle production line. In a vehicle control device, a control switching unit switches between conventional control and production line control. A determination unit determines whether to perform opening and closing control on the opening and closing device of the vehicle according to a first opening and closing condition in conventional control, and whether to perform opening and closing control on the opening and closing device according to a second opening and closing condition in production line control. The control unit performs opening and closing control on the opening and closing device based on the determination result of the determination unit. The first opening and closing condition includes conditions related to vehicle control signals where communication is stopped during software writing of the vehicle's electronic control devices. The second opening and closing condition does not include conditions related to vehicle control signals.

The embodiment of the invention provides a dew point control method, which comprises the following steps of: after an actual dew point of input gas is obtained, when the actual dew point is smaller than an alarm dew point and larger than a reference dew point, inquiring a fuzzy rule based on a deviation parameter, determining a value range of an adjusting parameter, and determining the value range of the adjusting parameter based on the value range of the adjusting parameter. The actual value of the adjusting parameter is determined, and the pressure controller is adjusted based on the actual value of the adjusting parameter to adjust the air pressure of the input gas, so that the actual dew point approaches the reference dew point. Thus, in the process of adjusting the pressure of the input gas by adjusting the pressure controller, the value range of the adjusting parameters is determined through the fuzzy rule, the problem that overshoot or oscillation is likely to occur in the conventional control technology is avoided, the actual dew point of the gas is controlled to be close to the reference dew point, and the control accuracy is improved. And the condensation phenomenon caused by the fact that the actual dew point exceeds the alarm dew point is avoided.

The invention relates to the technical field of inverter control, and discloses an optical storage system energy damping cooperative control method comprising a conventional control mode and a damping control mode. In the conventional control mode, the energy storage inverter adopts capacitance current feedback active damping control, and normal charging and discharging and power smoothing can be realized; in the damping control mode, the inverter introduces an impedance adaptive branch, extracts a common coupling point harmonic voltage through a wave trap, generates a harmonic current instruction through a virtual resistor, and converges the harmonic current instruction into a current reference end, thereby shaping output impedance and enhancing system damping. According to the method, the number of the energy storage inverters in the damping mode can be dynamically adjusted according to the stability state of the power grid, and flexible configuration of the damping capacity is achieved. According to the method provided by the invention, oscillation can be effectively suppressed under different power grid impedance conditions, the system stability is improved, additional hardware equipment is not needed, and safe, stable and economic operation of the optical storage system is considered.

The present application relates to the technical field of vehicle control, and discloses a VCU torque control system based on multi-sensor fusion, which comprises a system monitoring and fault diagnosis module, a data acquisition and preprocessing module, and a control decision-making module.The system monitoring and fault diagnosis module is used for generating a sensor failure flag when diagnosing that a yaw rate sensor fails.The data acquisition and preprocessing module is used for receiving the sensor failure flag generated by the system monitoring and fault diagnosis module, and collecting real-time data of a healthy sensor, and then generating a real-time feature vector.The fusion scheme of a Gaussian process regression state observer and a random model predictive controller is adopted, state perception uncertainty information is transmitted to the control decision-making layer, and the problem that when a deterministic state observer and a conventional controller are cascaded in the prior art, the controller cannot perceive the quality of upstream state estimation, and when the estimation is inaccurate, the system is unstable or the performance is reduced due to over-actuation control.

1. The name of the design product: motor drive control graphical user interface for electronic equipment. 2. The use of the design product: for an electronic device. 3. The design points of the design product: the content of the graphical user interface. 4. The picture or photo that best indicates the design points: design 1 front view. 5. The use of the graphical user interface: the present graphical user interface is used for motor drive control. The present application contains five similar designs, and their interaction logic is as follows: (1) Design 1 front view shows the operation main interface of the motor drive control system, click "basic information" in design 1 front view, the interface switches to design 1 interface change state diagram; (2) Design 2 front view is the same as design 1, click "general control parameters" in design 2 front view, the interface switches to design 2 interface change state diagram; (3) Design 3 front view is the same as design 1, click "control port setting" in design 3 front view, the interface switches to design 3 interface change state diagram; (4) Design 4 front view is the same as design 1, click "pump protection setting" in design 4 front view, the interface switches to design 4 interface change state diagram; (5) Design 5 front view is the same as design 1, click "parameter monitoring" in design 5 front view, the interface switches to design 5 interface change state diagram. 6. Design 1 is designated as the basic design.

The application provides a differential control method, system and terminal equipment of multi-wheel independent driving, when the control system receives the steering control command issued by the operation end, the program will judge whether the current steering working condition is the unmanned platform steering differential control request under the driving steering working condition or the in-place steering differential control request under the no driving command working condition; according to the judgment result, the speed of each driving wheel is adjusted according to the preset control strategy, so that the platform completes the differential steering action. The control method of the application completes the automatic identification of each working condition and the realization of differential steering control for the differential steering working condition of the unmanned platform, and gives the corresponding optimization control for the differential steering under different modes in combination with the system safety control. Compared with the existing conventional control method, the application has the characteristics of fast response speed and high safety.

The invention relates to the technical field of industrial process data acquisition, in particular to an industrial process data acquisition method and system based on a PLC. Comprising the steps that a PLC performs high-frequency sampling on an input signal at a data updating frequency higher than a conventional control period and writes the input signal into a circular buffer for rolling storage; continuously monitoring a process state, and triggering data aggregation when a preset process event is identified; extracting event-related high-frequency data from the buffer area, acquiring conventional process data, performing structured integration to form a composite data frame, and injecting a uniform time stamp; and the data frame is sent to a data acquisition gateway, and the gateway analyzes the data frame according to a preset structure, processes the data frame according to a format and uploads the data frame to an upper analysis system. The problem that key dynamic information is difficult to effectively utilize when an existing PLC system meets complex data acquisition requirements is solved.

The application discloses a kind of power control systems based on new energy conventional control and spot clearing control, including data receiving module, multi-time scale coordination module, conventional control module, spot clearing control module, judging module and switching execution module;The application fuses day-ahead, intraday market clearing result and real-time dispatching instruction by multi-time scale coordination module, identifies the conflict of scheduling and market;Spot clearing control module adopts two-stage distribution logic, the first stage is carried out bus level optimization distribution with node marginal price as target, the second stage introduces health degree coefficient to carry out unit level weighted distribution;Judging module realizes the intelligent switching of conventional control and spot clearing control based on output balance index combined with hysteresis comparison threshold, embeds market value signal into the whole process of power control, while ensuring the execution of power grid dispatching instruction, realizes the maximization of economic benefit of station and the balanced management of equipment health degree, with high market adaptability and operation stability.