43results about How to "Realize optimal control" patented technology

The invention provides a control scheme of a VAV (variable air volume) air-conditioning system. A neural network predictive control method is used for a tail end VAV-BOX and an air-conditioning unit, thus the hysteresis characteristic of a VAV system can be overcome, the control accuracy is improved, the resonance phenomena of an actuating mechanism can be greatly reduced, the energy-saving effect is improved by above 13%, and the control parameter tuning problem in the project is solved. A pressure independent cascade stage predictive control method is used for the tail end VAV-BOX, thus thecontrol accuracy can also be improved. The air-conditioning unit is provided with four control loops and can automatically select a static pressure control or total air volume control policy with adjustable setting static pressure by using an all-condition integrated control technology, thus the predictive control on a fan can be realized; the primary air volume of all the tail end VAV-BOXes can be detected and the air supply temperature can be adjusted according to the operation condition, thus the problem of too low temperature in partial air-conditioning area in the lowest fresh air operation is solved; the cascade stage predictive control method is adopted for a fresh air ratio control loop, thus the accurate control on the fresh air ratio can be realized and the energy-saving level can be further improved.

The invention discloses a central air conditioning fuzzy control system and a central air conditioning fuzzy control method. The central air conditioning fuzzy control system comprises central air conditioning equipment (10), a data acquirer (20), a central controller (30), an equipment controller (40) and/or an executor (50), wherein the data acquirer (20) is connected to the central air conditioning equipment (10), and is used for acquiring a plurality of operating parameters of the central air conditioning equipment (10); the central controller (30) is used for receiving the operating parameters acquired by the data acquirer (20), performing fuzzy reasoning according to the operating parameters, performing sharpening processing on reasoned fuzzy control volume, and determining output control volume; the equipment controller (3) and/or the executor (50) are/is connected to the central controller (30), and are/is used for receiving the output control volume determined by the central controller (30), and regulating the corresponding operating parameter according to a control instruction of the central controller (30). According to the central air conditioning fuzzy control system, a multiple input variable and multiple output variable central air conditioning system can be comprehensively controlled.

The invention discloses a calculation method for the security constrained unit commitment of an alternating current and direct current hybrid power grid. The method comprises the following steps that:establishing the active power equivalent models of an alternating current electric transmission line and a direct current electric transmission line, which participate in optimal scheduling, in a multi-area alternating current and direct current hybrid power grid; on the basis of the active power equivalent models, establishing a security constrained unit commitment optimal model which considerspartitioning load balance; solving the security constrained unit commitment optimal model; according to an optimization result, considering that all network monitoring elements are subjected to security correction; and if no new monitoring element power flow is out of limit, outputting an optimization result. Meanwhile, the invention discloses a corresponding system. By use of the method, power generation resources can be optimally regulated and controlled from a large range, a multi-area unit commitment scheme and the power plan of a cross-area alternating current and direct current electrictransmission line can be subjected to combined optimization, and large power grid ruling ability and electric power resource optimal configuration ability are improved.

The invention provides an underground wireless DCS (data communication system) safety monitoring system comprising a wireless network, a sensor module, an A/D (analog/digital) conversion module, a digital-analog transmission module, a server, a signal transceiver module and a processor. The sensor module, the A/D conversion module, the digital-analog transmission module, the server, the signal transceiver module and the processor are in communication by the wireless network. Environmental index parameters of different positions underground can be monitored by the system at any time and then sent to the processor of a monitoring center to be subjected to information analysis so as to realize early warning; further, accident locations of mines can be determined within a short time, emergency processing scheme making is facilitated, and safety of underground operators is guaranteed effectively.

The invention discloses a robot automatic production line experiment platform and a control method thereof. The robot automatic production line experiment platform is characterized in that three parallel-connected conveying belts of different conveying directions and cylinder push rods are arranged in the experiment platform to realize cyclic conveying operation of workpieces and packing boxes; image information and attitude information of the workpieces are acquired by adopting an industrial visual system; workpiece picking and packing operation is performed by adopting a robot and the grabbing hands thereof; workpiece unloading operation is performed on piece loading boxes by adopting slide stands and the grabbing hands thereof; and different settings are performed via the platform so that operation of different working modes is realized. Experiment means are provided to verification of research, simulation and control methods of different working modes on the production line, and the experiment device is also provided to the related teaching research.

A method for controlling the finish rolling steel throwing speed of a hot continuous rolling mill adopts a rack speed detector, a clamping-delivering roller speed detector, a conveying roller way speed detector, a basic automatic level control machine and a process control machine to conduct speed reduction correction and segmented speed reduction control on the speed of a conveying roller way in a laminar cooling region between a finish rolling process and a coiling process according to set process requirement, specifically a secondary tracking and positioning mode is adopted for the speed reduction point control, a secondary correction mode is adopted for tail portion speed reduction control process to achieve indirect control of tensions of strip steel and the conveying roller way.

The invention relates to a traffic signal optimization iteration method based on message matrix gridding. The method comprises the following steps of initializing a traffic network model related parameter matrix; initializing a traffic flow state matrix according to road traffic information obtained by a microwave vehicle detector and establishing a network node message function basis matrix; calculating a message function matrix of each iteration of this node; obtaining the message function matrix of the downstream node; calculating the optimal signal control quantity in the iteration; calculating the global optimization result; judging whether a system is stable; if the system is stable, stopping cyclic iteration; and otherwise, continuing the next cyclic iteration. The invention provides the signal optimization control method obtaining traffic flow information in real time in a traffic network and using the message function matrixes to realize stable optimization, rapid convergence and high real-time performance in a signal optimization iteration algorithm.

The present invention discloses a simulation test system for dynamic monitoring coal reservoir sensitivity and drainage control. The simulation test system comprises: a sample loading, confining pressure loading and pressure measurement module, which is configured to load a test sample, apply a confining pressure to the test sample in a test process, and measure and record pressure data in the test process; a gas-liquid fluid displacement injection module, which is configured to wash a test pipeline, vacuum the test system, and inject the gas-liquid fluid used for the test into the sample loading, confining pressure loading and pressure measurement module; and a gas-liquid collection and measurement module, which is configured to collect gas and liquid from the sample loading, confining pressure loading and pressure measurement module, and measure the amount of the collected gas and liquid. According to the test system provided by the present invention, the permeability change in the sensitivity generating process in the coal reservoir during the in-situ coalbed methane drainage can be dynamically monitored in real time, the effective control of the coalbed methane well drainage can be implemented, and the test system has high controllability, easy installation, and safety and reliability.

The present invention is a technological process of utilizing multicomponent second phase change in regulating aluminium-based solid solution component, and relates especially to the technological process of regulating solid solution components in crude aluminium foil. Different phase change reactions in aluminium alloy for aluminium foil is utilized and the phase change reaction is controlled in thermodynamic and dynamic conditions to regulate the aluminium-base solid solution component effectively. The process can optimize the Fe and Si solid solubility, textural structure and treating process of crude aluminium foil.

The invention discloses a method and product for improving the magnetic conductivity of an iron-based magnetic powder core based on the magnetic exchange length, and belongs to the technical field of soft magnetic materials and powder metallurgy. The preparation method comprises the following steps: firstly, coating the surface of iron-based soft magnetic powder with a silicon dioxide insulating layer to obtain iron-based/silicon dioxide soft magnetic composite powder; then adding the nanoscale iron-based soft magnetic powder into the binder, uniformly mixing and ultrasonically dispersing to obtain the binder with uniformly dispersed nanoscale iron-based soft magnetic powder; and finally, uniformly mixing the iron-based/silicon dioxide soft magnetic composite powder, a binder with uniformly dispersed nano-scale iron-based soft magnetic powder and a release agent, performing compression molding, and performing heat treatment to obtain a product of which the distance between magnetic phases in the iron-based magnetic powder core is controlled within a magnetic exchange length (30-75nm), so that the magnetic induction intensity and the magnetic conductivity of the product are effectively improved. The method is simple in process, easy to operate, low in production cost and suitable for popularization and application.

The invention discloses a temperature equalizing controller, which comprises a single chip, a temperature measuring unit, a temperature control output unit and a keystroke-type input unit, wherein the temperature measuring unit, the temperature control output unit and the keystroke-type input unit are connected with the single chip; and the temperature equalizing controller is characterized in that: a temperature value inputted by the keystroke-type input unit is used as a temperature set value, an on-site temperature value which is measured by the temperature measuring unit in real time is used as a temperature feedback value, a proportion integral differential (PID) control is introduced, a PID parameter is obtained according to a temperature error signal between the temperature set value and the temperature feedback value, the single chip transmits a relevant control signal according to the PID parameter to control the on-site temperature through the temperature control output unit. Due to the adoption of the temperature equalizing controller, the on-site temperature can be measured in real time, the on-site temperature can be adjusted according to the temperature measuring situation and a manual setup situation, the manual setup is completed by operating the keystrokes, and the optimized control of the temperature controller can be realized.

The invention relates to an intelligent control method for an air temperature and humidity of a greenhouse in facility agriculture. According to the method, two fuzzy controllers and a coordinating controller work cooperatively; the coordinating controller identifies a current operation state of a system; when an error is large, the fuzzy controller I is selected, so that temperature and humidity parameters fall back to a reasonable zone rapidly; and when an error is small, the fuzzy controller II is selected, so that temperature and humidity parameters are stabilized in a small range close to a target value. With the method, problems of large overshoot and low stability precision of the traditional single-structure fuzzy control method can be solved. Moreover, because the coupling relation between environment factors are taken into consideration fully by a multi-factor coordination control strategy, the regulation way is more scientific and reasonable than the single-factor control way.

The invention discloses a train quantitative loading system and method, and particularly relates to the technical field of train quantitative loading control. According to the technical scheme, the train quantitative loading system comprises a loading management computer system and a main pipeline, the loading management computer system is connected with a quantitative loading instrument, the quantitative loading instrument is connected with an explosion-proof junction box, one end of the explosion-proof junction box is connected with an oil spilling electrostatic protector, and one end of the explosion-proof junction box is connected with an emergency stop control cabinet; and an IC card reader is arranged in the quantitative loading instrument, one end of the oil spilling electrostatic protector is connected with an electrostatic grounding switch, one end of the oil spilling electrostatic protector is connected with an oil spilling protection switch, and one end of the emergency stop control cabinet is connected with an on-site explosion-proof emergency stop operation column. The train quantitative loading system and method have the beneficial effects that indirect intervention of manual work on the loading process is reduced, the investment of labor cost and time cost is reduced, the operation efficiency is improved, and the error rate is reduced.