7 results about "Multi loop control" patented technology

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 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 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.

A multi-loop control method and system for controlling a temperature of a device under test (DUT) is disclosed. An expansion valve flow controller receives three error inputs including a DUT temperature error, a heater power error, and a superheat error. The expansion valve flow controller includes a DUT temperature sub-controller configured to provide rapid response to instantaneous DUT heat load changes, a heater power sub-controller configured to provide slower adjustment for accumulated heater power error, and a superheat limiting sub-controller configured to prevent excessive refrigerant flow. Outputs of the sub-controllers are combined to generate an expansion valve flow percentage, which is constrained by a minimum threshold to maintain stable valve operation. The resulting expansion valve flow control signal is applied to a variable flow expansion valve of a refrigeration subsystem to maintain DUT temperature under rapidly changing heat load conditions.