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30 results about "Bang–bang control" patented technology

In control theory, a bang–bang controller (2 step or on–off controller), also known as a hysteresis controller, is a feedback controller that switches abruptly between two states. These controllers may be realized in terms of any element that provides hysteresis. They are often used to control a plant that accepts a binary input, for example a furnace that is either completely on or completely off. Most common residential thermostats are bang–bang controllers. The Heaviside step function in its discrete form is an example of a bang–bang control signal. Due to the discontinuous control signal, systems that include bang–bang controllers are variable structure systems, and bang–bang controllers are thus variable structure controllers.

Batch control using bang-bang control

A method for batch control in a system. The system comprises at least two batch processing sets that share at least one shared equipment. A batch is initiated in each processing set. Process variables from each batch are monitored. At least one process variable from at least one batch are adjusted using bang-bang control to prevent conflicts.
Owner:FRITO LAY NORTH AMERICA INC

Method and device for primary frequency regulation based on bang-bang control

The present invention provides a method and a device for primary frequency regulation based on bang-bang control, the method comprises: obtaining in real-time a power grid frequency of a steam turbine generator set; performing a subtraction operation on a rated power grid frequency and said power grid frequency to generate a power grid frequency difference; performing a dead zone process on the power grid frequency difference according to a dead zone fixed value to generate a frequency difference; performing a frequency difference compensation operation on the frequency difference to generate a frequency difference compensation instruction; and combining an original primary frequency regulation output instruction with the frequency difference compensation instruction and outputting the result to a steam turbine speed regulation system when a selecting switch is 1.
Owner:STATE GRID CORP OF CHINA

Variable-frequency speed adjustment technique-based Bang-Bang+PID (Piping and Instrument Diagram) constant pressure water supply closed-loop control method

The invention relates to a variable-frequency speed adjustment technique-based Bang-Bang+PID (Piping and Instrument Diagram) constant pressure water supply closed-loop control method, belonging to the technical field of constant pressure water supply control in industrial production. According to the method, a Bang-Bang controller and an error judger are added into a constant pressure water supply closed-loop control system; a controller is judged and selected by sampling a pressure set value and an actual pressure value and by calculating the errors; the output frequency of a frequency changer is adjusted and the rotation speed of a water pump motor is changed through the output of a PID controller or the Bang-Bang controller, so that the constant pressure control to the pressure of the outlet of a water supply pipe net is finally realized. According to the method, the high precision and the high stability of the PID control are combined with the rapidness and the small overshoot of the Bang-Bang control, only one operator is needed to input data in an HMI (Human-Machine Interface) in the whole operation process, the PLC (Programmable Logic Controller) then can automatically select a PID or Bang-Bang control policy according to pressure deviation, therefore, the control precision of the system is ensured, and at the same time the adjusting time of the system is greatly shortened.
Owner:北京金自能源科技发展有限公司 +1

Raw material grinding automatic control method

The invention discloses a raw material grinding automatic control method. In an automatic state, During amplitude control of a lifting and falling roller, an amplitude scope is tested mainly through observation and lifting and falling operation of a grinding roller is carried out. During control of water pump opening, operation conditions of a material layer thickness and a mill output temperature are integrated, a pid fuzzy control operation method is employed, and the water pump opening value is adjusted to achieve stabilization control effects. During the feed control link, feed quantity is controlled according to a current of a milling machine and a current of a powder selection machine and furthermore the current and the amplitude of the milling machine are stabilized. The problem that parameter adjustment cannot be tracked rapidly in a routine PID is avoided, according to characteristics that fuzzy control is independent from an accurate mathematic model and suitable for non-linear and large time delay production processes, by utilization of fuzzy PID and Bang-Bang control methods, a tracking error convergence speed is quickened, thus the vertical milling control process has a stable dynamic performance, milling machine vibration is reduced, the yield is raised and accurate and rapid control effects are achieved.
Owner:UNIV OF JINAN +1

Cement combined-grinding prediction control method based on Bang-Bang control

ActiveCN104384009ASmall fluctuationAvoid the impact of subsequent controlGrain treatmentsControl theoryTime-variant system
The invention provides a cement combined-grinding prediction control method based on Bang-Bang control. The Bang-Bang control process is employed for mixing operation experiences such as observation, waiting, determination and adjusting of an operator into a control algorithm, the tracking error convergence rate is accelerated, and the system overshoot is reduced, and thus the combined-grinding system production process has good stability and the precise rapid control purpose is reached. Aiming at cement mill load control, LPV (Linear Parameter-Varying) prediction control is applied to solve control problems of variation and nondeterminacy of parameters of a linear time-varying system, and enable the system to have good robustness.
Owner:UNIV OF JINAN +1

Compound controlling method for semiconductor refrigerator fast heating/refrigerating system

A compound temperature control method for the quick heating / cooling system of the semiconductor refrigerator. The invention leads the feed forward, the feedback and the Bang-Bang controlling method in the temperature control system according the module of the controlling object. It uses the Bang-Bang controlling method firstly and changes to the 'feed forward with the PID'mode when the deviation is less than the threshold quantity. They are all done by the controller. The feed forward and the Bang-Bang control reach the tracking quickly and the feedback control is the PID control with the changing structure which match to the feed forward to celebrate the speed of the rising or dropping the temperature and decrease the tracking error. It can decreases the 36% of the rising time with the 80% overshoot at the same time.
Owner:SHANGHAI JIAO TONG UNIV

Batch control using bang-bang control

A method for batch control in a system. The system comprises at least two batch processing sets that share at least one shared equipment. A batch is initiated in each processing set. Process variables from each batch are monitored. At least one process variable from at least one batch are adjusted using bang-bang control to prevent conflicts.
Owner:FRITO LAY NORTH AMERICA INC

Self-Regulating Gas Generator and Method

InactiveUS20120280179A1Increase and decreases gas production rateExtend your lifeReactant parameters controlOther chemical processesChemical solutionTorch
A self-regulating gas generator that, in response to gas demand, supplies and automatically adjusts the amount of gas (e.g., hydrogen or oxygen) catalytically generated in a chemical supply chamber from an appropriate chemical supply, such as a chemical solution, gas dissolved in liquid, or mixture. In some embodiments, the gas generator may employ a piston, rotating rod, or other element(s) to expose the chemical supply to the catalyst in controlled amounts. In another embodiment, the self-regulating gas generator uses bang-bang control, with the element(s) exposing a catalyst, contained within the chemical supply chamber, to the chemical supply in ON and OFF states according to a self-adjusting duty cycle, thereby generating and outputting the gas in an orientation-independent manner. The gas generator may be used to provide gas for various gas consuming devices, such as a fuel cell, torch, or oxygen respiratory devices.
Owner:ENCITE LLC

Method for suppressing brushless direct current motor phase change torque fluctuation based on Bang-bang control

The invention provides a method for suppressing brushless direct current motor phase change torque fluctuation based on Bang-bang control. The method includes the following steps that (1), a work area of a motor is judged; (2), if the motor is located in a phase change work area, a torque fluctuation index is calculated and compared with an upper limiting value and a lower limiting value, and the step(3) is executed, and if the motor is located in a non-phase-change work area, the step (1) is executed again; the torque fluctuation index is a parameter reflecting the intensity of the torque fluctuation, and the upper limiting value and the lower limiting value are set values; (3), according to the comparison result between the torque fluctuation index, and the upper and lower limiting values, a turn-off phase of the motor is controlled to be turned off and communicated. The defects that according to an existing solution of suppressing the brushless direct current motor torque fluctuation, the optimal phase change moment is difficult to determine, implementation can not be performed within a full-speed range of the motor, and a control strategy is complex are overcome. The method can be effective and practical within the full-speed running range of the motor, the problem of phase change torque pulses of the motor is effectively solved, and running reliability of the motor is greatly improved.
Owner:TONGJI UNIV +1

Rapid on-line planning method for soft landing burnup optimal trajectory of small celestial body

The invention discloses a rapid on-line planning method for a soft landing optimal trajectory of a small celestial body, and belongs to the technical field of deep space exploration. The implementation method comprises the following steps: determining an optimal trace control form of small celestial body fuel consumption as a bank-bank control form, determining the switching times of controlling athrust amplitude bank-bank form, and determining a switching sequence of the bank-bank form for controlling the thrust amplitude on the basis of the switching times. Therefore, the optimal path planning problem of small celestial body fuel consumption is converted into the online search problem of the bang-bang control switching moment. Through a numerical prediction-correction strategy, on-linesearch is carried out on switching time, a two-variable search problem is converted into a sequence single-variable search problem of an inner loop and an outer loop, on-line generation of a small celestial body soft landing fuel consumption optimal trajectory is achieved, and rapidity and convergence of the landing trajectory planning method are guaranteed.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY

Genetic algorithm optimized fuzzy PID flow control method in variable-rate spraying system

The invention discloses a genetic algorithm optimized fuzzy PID flow control method in a variable-rate spraying system and belongs to the technical field of automatic control. The method includes the following steps that: actual crop pest and disease damage information is collected, such that required actual drug dosage can be determined; deviation between set flow and actual flow is calculated; flow deviation and the change rate of the deviation are calculated; and optimization is performed on a fuzzy controller is through using a genetic algorithm, wherein the optimization includes the steps of determining the optimized algebra, crossover rate, mutation rate and fitness function of the computation of the genetic algorithm, and optimizing the fuzzy controller according to system index requirements; errors and the change rate of the errors are inputted to the fuzzy PID controller optimized by the genetic algorithm, and output after the computation is adopted as control quantity of the variable-rate spraying system; and when the system has large errors, bang-bang control is adopted, and when the system has small errors, optimized fuzzy PID control is adopted. With the genetic algorithm optimized fuzzy PID flow control method of the invention adopted, a precise control method can be provided for a precise agriculture drug application system, and agricultural agents can be effectively saved.
Owner:CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY +1

Self-regulating gas generator and method

A self-regulating gas generator that, in response to gas demand, supplies and automatically adjusts the amount of gas (e.g., hydrogen or oxygen) catalytically generated in a chemical supply chamber from an appropriate chemical supply, such as a chemical solution, gas dissolved in liquid, or mixture. In some embodiments, the gas generator may employ a piston, rotating rod, or other element(s) to expose the chemical supply to the catalyst in controlled amounts. In another embodiment, the self-regulating gas generator uses bang-bang control, with the element(s) exposing a catalyst, contained within the chemical supply chamber, to the chemical supply in ON and OFF states according to a self-adjusting duty cycle, thereby generating and outputting the gas in an orientation-independent manner. The gas generator may be used to provide gas for various gas consuming devices, such as a fuel cell, torch, or oxygen respiratory devices.
Owner:ENCITE LLC

Dual-mode controller of electrical-mechanical converter

InactiveCN105827172AReduced total control timePreserve precisionAC motor controlHysteresisGrating
The present invention discloses a dual-mode controller of an electrical-mechanical converter. The dual-mode controller of the electrical-mechanical converter comprises a control chip, a digital analog converter (DAC), a hysteresis comparison PWM modulator, a current signal conditioning circuit, a difference orthogonal signal conditioning circuit, a signal switching switch, an H-bridge driving module, a protection circuit, the electrical-mechanical converter, a temperature sensor, a current sensor and a digital grating scale. An input signal and a feedback signal are processed by the signal conditioning circuits and then are sent to the control chip, the control chip determines and operates to obtain a control signal, and the control signal is sent to an H-bridge driver to drive the electrical-mechanical converter to reach an expected control objective, wherein the control chip switches between a PID closed-loop control mode and a time optimal Bang-Bang control mode according to an error signal, thereby achieving the control objective of being high in response characteristic and not losing the precision.
Owner:GUANGZHOU INST OF ADVANCED TECH CHINESE ACAD OF SCI +1

Stable control method for rotating speed of axial flow fan

The invention belongs to a control technology for a medium-power axial flow fan and relates to a stable control method for the rotating speed of the axial flow fan. According to the scheme adopted by the invention, the stable control method comprises the following steps: carrying out logic synthesis through utilizing three pulse signals with a difference of 60-degree electric angle among each other, which are output by an axial flow fan position sensor, so as to obtain a speed feedback signal Speed-FB; capturing a count difference between the adjacent hop edges of the Speed-FB signal so as to obtain the frequency f of the Speed-FB, and further obtaining the rotating speed digital signal Speed of the axial flow fan; carrying out a window filtering process with sum and average filtering compensation on the Speed to obtain a real-time rotating speed Speed-BH required by closed loop control; finally adopting a BANG-BANG control algorithm to realize closed loop stable control on the rotating speed of the axial flow fan. The stable control method realizes stable soft starting and precise speed control on the axial flow fan, reduces pulses in the transient corresponding process of the axial flow fan and reduces noise in the running process.
Owner:FLIGHT AUTOMATIC CONTROL RES INST

Bang-bang control using tangentially mounted surfaces

Control surfaces secured tangentially to a round projectile, such that the lift force generated by the control surfaces is generated through the projectiles centerline. This eliminates the need for an opposing fin to counter roll moment. Sizing the control surfaces to form an equilateral triangle gives each panel equal span, and enables the force generated by two panels to be equal and opposite to that of the opposing panel. The end effect is that each panel only has two active states (neutral and positive deflection). Thus, a solenoid and a return spring may be used to control the canards. Additionally, the control panels may fold along the surface of the projectile, which frees up internal volume and minimizes the length of the control section.
Owner:RAYTHEON CO

Method and device for primary frequency regulation based on bang-bang control

The present invention provides a method and a device for primary frequency regulation based on bang-bang control, the method comprises: obtaining in real-time a power grid frequency of a steam turbine generator set; performing a subtraction operation on a rated power grid frequency and said power grid frequency to generate a power grid frequency difference; performing a dead zone process on the power grid frequency difference according to a dead zone fixed value to generate a frequency difference; performing a frequency difference compensation operation on the frequency difference to generate a frequency difference compensation instruction; and combining an original primary frequency regulation output instruction with the frequency difference compensation instruction and outputting the result to a steam turbine speed regulation system when a selecting switch is 1.
Owner:STATE GRID CORP OF CHINA

Space vector pulse width modulation (SVPWM) method for T-type NPC converter

InactiveCN107453642AAvoid Modulation Voltage Sudden ChangesReduce harmonic contentAc-dc conversionPotential differenceHarmonic
According to a space vector pulse width modulation (SVPWM) method for a T-type NPC converter, a switch state within an arbitrary period is directly analyzed from a starting point of a three-phase modulation voltage, an allocation ratio and a compensation direction are determined according to amplitude and direction of difference between a positive bus voltage and a negative bus voltage and a current direction of maximum phase of an absolute value of the modulation voltage, and thus, a small vector is visually allocated again. The allocation proportion of the small vector is relevant to midpoint potential difference amplitude, a proportion regulator is used for regulation, the abrupt change of the modulation voltage caused by Bang-Bang control of a midpoint potential is prevented, and the harmonic content is reduced.
Owner:北京科诺伟业科技股份有限公司

Self-regulating gas generator and method

A self-regulating gas generator that, in response to gas demand, supplies and automatically adjusts the amount of gas (e.g., hydrogen or oxygen) catalytically generated in a chemical supply chamber from an appropriate chemical supply, such as a chemical solution, gas dissolved in liquid, or mixture. In some embodiments, the gas generator may employ a piston, rotating rod, or other element(s) to expose the chemical supply to the catalyst in controlled amounts. In another embodiment, the self-regulating gas generator uses bang-bang control, with the element(s) exposing a catalyst, contained within the chemical supply chamber, to the chemical supply in ON and OFF states according to a self-adjusting duty cycle, thereby generating and outputting the gas in an orientation-independent manner. The gas generator may be used to provide gas for various gas consuming devices, such as a fuel cell, torch, or oxygen respiratory devices.
Owner:ENCITE LLC

Speed difference steering vehicle steering controller based on driver model and control method

ActiveCN107651010AGuaranteed accuracy in placeMeet the needs of autonomous steering movementSteering linkagesAutomatic steering controlBang bangDriver/operator
The invention relates to a speed difference steering vehicle steering controller based on a driver model and a control method. The speed difference steering vehicle steering controller comprises a Bang-Bang controller body based on an experience driver operating lever clustering model and a blurring PI controller body based on reinforcement learning optimization, the experience driver operating model, Bang-Bang control and blurring PI control based on reinforcement learning optimization are combined to control a hydraulic servo driving steering system, meanwhile the rapidity of the system response speed and the operating level in-place accuracy are ensured, and the requirement for autonomous steering movement of an unmanned vehicle steering system can be met.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY

Steering controller and control method for differential steering vehicle based on driver model

ActiveCN107651010BGuaranteed accuracy in placeMeet the needs of autonomous steering movementSteering linkagesAutomatic steering controlDriver/operatorBang bang
The invention relates to a speed difference steering vehicle steering controller based on a driver model and a control method. The speed difference steering vehicle steering controller comprises a Bang-Bang controller body based on an experience driver operating lever clustering model and a blurring PI controller body based on reinforcement learning optimization, the experience driver operating model, Bang-Bang control and blurring PI control based on reinforcement learning optimization are combined to control a hydraulic servo driving steering system, meanwhile the rapidity of the system response speed and the operating level in-place accuracy are ensured, and the requirement for autonomous steering movement of an unmanned vehicle steering system can be met.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY

Filtering and absorbing device based on bang-bang control

The invention relates to the technical field of filter absorbers, and discloses a filter absorber based on bang-bang control, which includes: a temperature sensor for collecting the ambient temperature of the filter absorber in real time and converting it into a temperature signal; a humidity sensor for The ambient humidity of the filter absorber is collected in real time and converted into a humidity signal; the power supply module is used to supply power to the filter absorber; the bang‑bang algorithm control module is used to receive temperature signals and humidity signals; the threshold adjustment module is used to provide power to the bang‑bang algorithm The bang algorithm control module sets the temperature threshold and the humidity threshold, and the bang-bang algorithm control module is used to compare the temperature signal and the humidity signal with the temperature threshold and the humidity threshold respectively, and when the ambient temperature exceeds the temperature threshold or the ambient humidity exceeds the humidity threshold Cutting off the power supply module and generating an alarm signal; and an alarm module, configured to receive the alarm signal for alarming. The invention can preferably improve the service life of the free exciter in the filter absorber.
Owner:ZHEJIANG SANYI TECH CO LTD

A stable control method for the rotational speed of an axial flow fan

The invention belongs to a control technology for a medium-power axial flow fan and relates to a stable control method for the rotating speed of the axial flow fan. According to the scheme adopted by the invention, the stable control method comprises the following steps: carrying out logic synthesis through utilizing three pulse signals with a difference of 60-degree electric angle among each other, which are output by an axial flow fan position sensor, so as to obtain a speed feedback signal Speed-FB; capturing a count difference between the adjacent hop edges of the Speed-FB signal so as to obtain the frequency f of the Speed-FB, and further obtaining the rotating speed digital signal Speed of the axial flow fan; carrying out a window filtering process with sum and average filtering compensation on the Speed to obtain a real-time rotating speed Speed-BH required by closed loop control; finally adopting a BANG-BANG control algorithm to realize closed loop stable control on the rotating speed of the axial flow fan. The stable control method realizes stable soft starting and precise speed control on the axial flow fan, reduces pulses in the transient corresponding process of the axial flow fan and reduces noise in the running process.
Owner:FLIGHT AUTOMATIC CONTROL RES INST

Bang-bang control strategy-based optimal time tracking and capturing system and method

The invention discloses a Bang-bang control strategy-based optimal time tracking and capturing system and a Bang-bang control strategy-based optimal time tracking and capturing method. The system comprises a positioning module, a decoupling module, a communication module, an algorithm analysis module and a pursuit robot control module, wherein the positioning module, the decoupling module, the communication module, the algorithm analysis module and the pursuit robot control module are connected in turn. By the Bang-bang control strategy-based optimal time tracking and capturing system, a control algorithm is applied to an intelligent-agent robot for tracking and capturing an invader, the capturing time is the shortest under the condition that the invader linearly moves, the invader and a pursuer are positioned through visual information, the acquired position information is transmitted to a pursuit robot through wireless sensor node communication, and a rule of applying controlled quantity is obtained by the pursuit robot through algorithm analysis so as to control the pursuit robot itself and finish tracking and capturing.
Owner:SHANGHAI JIAOTONG UNIV

Variable-frequency speed adjustment technique-based Bang-Bang+PID (Piping and Instrument Diagram) constant pressure water supply closed-loop control method

The invention relates to a variable-frequency speed adjustment technique-based Bang-Bang+PID (Piping and Instrument Diagram) constant pressure water supply closed-loop control method, belonging to the technical field of constant pressure water supply control in industrial production. According to the method, a Bang-Bang controller and an error judger are added into a constant pressure water supply closed-loop control system; a controller is judged and selected by sampling a pressure set value and an actual pressure value and by calculating the errors; the output frequency of a frequency changer is adjusted and the rotation speed of a water pump motor is changed through the output of a PID controller or the Bang-Bang controller, so that the constant pressure control to the pressure of the outlet of a water supply pipe net is finally realized. According to the method, the high precision and the high stability of the PID control are combined with the rapidness and the small overshoot of the Bang-Bang control, only one operator is needed to input data in an HMI (Human-Machine Interface) in the whole operation process, the PLC (Programmable Logic Controller) then can automatically select a PID or Bang-Bang control policy according to pressure deviation, therefore, the control precision of the system is ensured, and at the same time the adjusting time of the system is greatly shortened.
Owner:北京金自能源科技发展有限公司 +1

svpwm modulation method for t-type npc converter

InactiveCN107453642BAvoid Modulation Voltage Sudden ChangesReduce harmonic contentAc-dc conversionPotential differenceHarmonic
According to a space vector pulse width modulation (SVPWM) method for a T-type NPC converter, a switch state within an arbitrary period is directly analyzed from a starting point of a three-phase modulation voltage, an allocation ratio and a compensation direction are determined according to amplitude and direction of difference between a positive bus voltage and a negative bus voltage and a current direction of maximum phase of an absolute value of the modulation voltage, and thus, a small vector is visually allocated again. The allocation proportion of the small vector is relevant to midpoint potential difference amplitude, a proportion regulator is used for regulation, the abrupt change of the modulation voltage caused by Bang-Bang control of a midpoint potential is prevented, and the harmonic content is reduced.
Owner:北京科诺伟业科技股份有限公司

Realizing method of illumination analog system in high-speed vehicle passenger room

The invention discloses an illumination analog system in high-speed vehicle passenger room, comprising a computer, an IGBT light modulator and a lamp set which are in turn connected, and an illumination sensor that is connected with the input end of the computer, wherein the lamp set and the illumination sensor are installed in the vehicle passenger room. According to the control characteristic of the rapid change of the illumination, the system combines the bang-bang control and the fuzzy control, parallel connects the lamp sets and controls them in groups, and has uniform illumination distribution and small illumination error; besides, the invention can tracking control the illumination change in each passenger room and well satisfies the research of the high-speed train illumination change on the passenger comfortableness effect relationship. In the current adjusting method, the illumination rapid change is analogized and the anticipant illumination value is rapidly tracked via the actual illumination. The bang-bang control is used for controlling the rapid change of the illumination and the fuzzy control is used for adjusting the overshoot of the illumination so that the precise control of the illumination is realized and the robustness of the illumination control system is increased.
Owner:江苏天佑路航认证检测有限公司

Automatic Control Method of Raw Material Grinding

The invention discloses a raw material grinding automatic control method. In an automatic state, During amplitude control of a lifting and falling roller, an amplitude scope is tested mainly through observation and lifting and falling operation of a grinding roller is carried out. During control of water pump opening, operation conditions of a material layer thickness and a mill output temperature are integrated, a pid fuzzy control operation method is employed, and the water pump opening value is adjusted to achieve stabilization control effects. During the feed control link, feed quantity is controlled according to a current of a milling machine and a current of a powder selection machine and furthermore the current and the amplitude of the milling machine are stabilized. The problem that parameter adjustment cannot be tracked rapidly in a routine PID is avoided, according to characteristics that fuzzy control is independent from an accurate mathematic model and suitable for non-linear and large time delay production processes, by utilization of fuzzy PID and Bang-Bang control methods, a tracking error convergence speed is quickened, thus the vertical milling control process has a stable dynamic performance, milling machine vibration is reduced, the yield is raised and accurate and rapid control effects are achieved.
Owner:UNIV OF JINAN +1
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