17 results about "Multi loop control" patented technology

The invention relates to the technical field of equipment control data processing, in particular to a submerged chain conveyor system based on multi-loop automatic water replenishing control, which comprises a data acquisition module, a water level analysis module, a water replenishing strategy generation module, a multi-loop control module, a water replenishing execution module, a dynamic adjustment module, an exception handling module and a communication coordination module. The data acquisition module synchronously acquires liquid level, temperature and viscosity data through a multi-mode sensor group, and the data are normalized and denoised by the data fusion unit and then transmitted to the water level analysis module; the water level analysis module adopts an ARIMA time sequence prediction model to generate a water level dynamic trend, and outputs a water replenishing demand level through comparison in combination with a viscosity threshold value; the water replenishing strategy generation module calls the rule base to generate a multi-loop water replenishing strategy, the problems of blockage and environmental protection risks caused by the fact that traditional single-loop control cannot cooperatively regulate and control water quality parameters in a multivariable coupling environment are solved, the water replenishing response precision and the system stability are improved, generation of pipeline hardening substances is restrained, and the equipment shutdown frequency is reduced.

The invention provides a steam pipe network energy consumption intelligent monitoring and optimization control method and system, and belongs to the technical field of industrial automation and energy management, and the method comprises the steps: obtaining the multi-dimensional perception data of a steam pipe network, extracting the multi-dimensional feature vector representing the operation state from the multi-dimensional perception data, and constructing a multi-dimensional feature matrix, the initial running state of the steam supply system is obtained; on the basis of the multi-dimensional feature matrix, the coupling relation between the loops of the steam pipe network is recognized in real time, a coupling coefficient matrix is constructed and dynamically updated, and a control optimization strategy of the steam supply system is generated in combination with the initial operation state and the coupling coefficient matrix; controlling the steam supply system to design a feedforward decoupling compensator according to a control optimization strategy and a coupling coefficient matrix updated in real time, and constructing a hierarchical control architecture; and realizing adaptive adjustment and coordinated optimization of the target control loop according to the parameters of the multi-loop controller. According to the invention, self-adaptive closed-loop control in the steam pipe network is realized.

The invention provides a dynamic adjustment method and system for traditional Chinese medicine cooking temperature. The method comprises the following steps: collecting the temperature of each subarea of a medicine decocting pot and a steam inlet pressure parameter in real time, generating a temperature distribution deviation parameter through area weighting processing, and dynamically coupling the temperature distribution deviation parameter with steam pressure to form a composite parameter reflecting the heat exchange efficiency; a multi-loop control strategy is adopted, the opening degree of a steam valve set of the corresponding partition is dynamically adjusted based on the composite parameters, and the valve priority is set according to the space position of the partition; a pressure fluctuation compensation mechanism is innovatively introduced, physical boundary constraint processing is carried out on opening parameters through an iterative algorithm, and finally the temperature distribution imbalance degree of each partition is converged to a preset threshold value; and a closed-loop adjusting system is formed through a valve cooperative control and dynamic compensation algorithm. According to the technical scheme provided by the invention, rapid and balanced control of partition temperatures of the medicine decocting pot is realized, and the thermal consistency and the medicinal component extraction stability in the traditional Chinese medicine cooking process are effectively improved.

The invention discloses a multi-loop control circuit and a control method thereof. The multi-loop control circuit comprises an amplification stage circuit and a current selection circuit. Wherein the amplification stage circuit is provided with a first transduction amplifier capable of outputting a first transduction amplification current and a second transduction amplifier capable of outputting a second transduction amplification current. The current selection circuit receives the first transduction amplification current and the second transduction amplification current and outputs an error output current. The current selection circuit selects the maximum one from the first transduction amplification current and the second transduction amplification current and outputs the maximum one as an error output current, and the error output current generates an error amplification signal.

The invention belongs to the technical field of boiler steel ball mill powder milling control, and particularly relates to a steel ball mill powder milling self-adaptive control system and a control method. A multivariable self-adaptive control method is adopted, and a mill inlet hot air door, a powder exhauster recirculation air door and a mill coal feeder rotating speed are used as regulating variables; decoupling control is conducted on the mill outlet temperature, the mill inlet negative pressure and the mill inlet and outlet differential pressure; and estimating control characteristic model parameters of the steel ball milling system by using a radial basis function neural network and historical data, and performing decoupling compensation control on a characteristic vector space of an input quantity sensitivity matrix based on a controlled quantity of a controlled object. According to the invention, decoupling control of the coal mill outlet temperature, the coal mill inlet negative pressure and the coal mill inlet and outlet differential pressure of the steel ball mill pulverizing system is realized; the problem of multivariable coupling existing in a conventional independent multi-loop control mode can be effectively solved, and long-term stable operation of automatic control of the coal pulverizing system is achieved.

The application discloses a wind heat environment simulation device and a control method thereof. The method is characterized in that a heating array composed of a flexible electric heating film and a one-to-one corresponding temperature sensor array are arranged on the surface of a heated object, and a wind speed sensor is arranged. A controller calculates the basic heating power of each heating unit according to a preset wind speed-power mapping relationship and a real-time wind speed value. Meanwhile, the power of each heating unit is independently closed-loop corrected according to the deviation between the actual temperature and the target temperature fed back by each point temperature sensor. After the feedforward value and the feedback correction value are superimposed, each heating unit is driven by a multi-loop PWM controller. The application realizes the instant response of the heating array to the change of the wind speed and the accurate control of the non-uniform temperature field on the surface, has the advantages of small thermal inertia, high control precision, low system complexity and easy expansion, and provides a reliable experimental platform for the research on the urban wind heat environment.

This application provides a method and system for dynamically adjusting the temperature of traditional Chinese medicine (TCM) decoction. The method involves real-time acquisition of temperature and steam inlet pressure parameters for each zone of the decoction pot, followed by regional weighting to generate temperature distribution deviation parameters. These parameters are then dynamically coupled with the steam pressure to form a composite parameter reflecting heat exchange efficiency. A multi-loop control strategy is employed to dynamically adjust the opening degree of the steam valve groups in the corresponding zones based on these composite parameters, with valve priority set according to the spatial location of each zone. An innovative pressure fluctuation compensation mechanism is introduced, using an iterative algorithm to apply physical boundary constraints to the opening parameters, ultimately converging the temperature distribution unevenness of each zone to a preset threshold. A closed-loop control system is formed through valve collaborative control and a dynamic compensation algorithm. The technical solution provided in this application achieves rapid and balanced temperature control of the decoction pot zones, effectively improving the thermal consistency and extraction stability of medicinal components during the TCM decoction process.

The application discloses an integrated control module, an IO interface circuit and a controller, wherein the integrated control module is configured to build a closed-loop control system in an analog domain, convert an electrical signal input by an IO interface into an analog input waveform by using a waveform encoder, synthesize the analog input waveform into a periodic time-division multiplexing analog input signal wave by using an input waveform multiplexer driven by a time sequence controller, generate an isomorphic analog setting signal wave by setting a waveform generator, directly analog subtract two waveforms by using a differential amplifier to obtain an analog differential signal wave, separate the analog differential signal wave into independent pulse error signals of each channel by using a synchronous demodulation and distribution unit in combination with a sample and hold circuit, and finally generate a driving signal by an analog PID controller. The application solves the problems of the synchronism and the integration of multi-loop control by using a unique analog domain time-division multiplexing and demodulation architecture, and provides a new hardware solution for high-performance real-time control.

The invention relates to the technical field of anti-swing control of bridge cranes, in particular to a double-swing bridge crane integrated control method and system which comprises an equation calculation unit, a shaping design unit, a target setting unit, a convolution operation unit, an integral operation unit, an error calculation unit and a control calculation unit. By arranging a double-pendulum bridge crane system mathematical model with a double-pendulum effect and introducing an input shaper, the swing suppression and anti-interference performance of the system disclosed by the invention is improved based on the control of the control system on the double-pendulum bridge crane, and by arranging the multi-loop control system and the nonlinear PID integrated control system, the system has the advantages of high reliability and high reliability. Through the synergistic effect of input shaping and the controller, the vibration frequency characteristic and full-state real-time information of the double-pendulum bridge type crane system are fully considered, so that the double-pendulum bridge type crane system has good response speed and stability, the residual swing of the double-pendulum bridge type crane system is reduced, and the service life of the double-pendulum bridge type crane system is prolonged. And the engineering transportation efficiency of the double-pendulum bridge crane system is improved.

The invention discloses a control method and device of a multi-loop fast reflector, equipment and a medium, relates to the technical field of optical control, and can improve the dynamic performance of a fast reflector system. According to the scheme, the method comprises the steps that the current state of the reflector is collected, wherein the current state comprises the current position, the current angle error and the last control quantity; according to the current state, a corresponding current control parameter is determined from a target control strategy table, the target control strategy table comprises a mapping relation between the state of the reflector and the control parameter, and the mapping relation is formed by inputting the state to a target adaptive strategy network after state discretization to obtain the corresponding control parameter; the target adaptive strategy network is obtained by training based on a reinforcement learning depth deterministic strategy gradient algorithm; according to the current control parameters, the current state and a preset multi-loop controller of a reflector control system, the current control quantity is calculated, the reflector is controlled based on the current control quantity, and the multi-loop controller comprises an inner loop controller and an outer loop controller.

The application discloses a single-satellite high-precision cooperative remote sensing method, which is applied to a satellite platform with multiple loads, and payloads are connected with the satellite platform through flexible cables, contactless actuators and the satellite platform to form a multi-loop control system; the method comprises the following steps: (1) equivalent the flexible cable to a combination of multiple beads, springs and dampers; (2) establishing force equations and moment equations of all payloads, all flexible cables and the satellite platform; establishing control equations and constraint conditions of the multi-loop control system; (3) according to the control equations and constraint conditions of the multi-loop control system, the payloads are oriented, multiple payloads are directed to the same target, and the distance between the payloads and the satellite platform is controlled within a critical distance. Through the contactless actuators, the flexible cable dynamics modeling and the establishment of the control equations of the multi-loop control system, the super-static super-stable and cooperative work of multiple payloads on a single satellite platform are realized.