596results about How to "Solve control problems" patented technology

The invention relates to an SCR (Selective Catalytic Reduction) denitration system ammonia spraying quantity optimal control system and method based on intelligent feedforward signals. The SCR denitration system ammonia spraying quantity optimal control system based on intelligent feedforward signals is characterized in that as input parameters of a denitration system can be easily influenced by the combustion state of a boiler and for adapting to the requirement of large range of depth change of conditions for a thermal power generating unit, the SCR denitration system ammonia spraying quantity optimal control system based on intelligent feedforward signals takes the historical data of a power plant as the basis, utilizes the idea of data modeling, takes adjustable parameters at the boiler side as input and NOX concentration at the outlet of a hearth as output, utilizes a Least Squares Support Vector Machine algorithm to construct a prediction model which can be used for constructing an intelligent feedforward controller in a ammonia spraying quantity control strategy, and takes dynamic matrix control (DMC) as a main controller and PID as an auxiliary controller to construct a cascade feedback control structure; during the operating process, the intelligent feedforward controller outputs feedforward control signals in real time according to changes of the parameters at the boiler side, quickly gives a response to change of conditions of the unit, and forms an SCR system ammonia spraying quantity optimal control strategy together with feedback control, and can realize quick accurate control of the ammonia spraying quantity.

This invention relates to a double- cycle high efficient heat pipe heat exchanging system that can control the heat exchanging quantity. There are evaporator and condenser two types of heat exchangers. The number of each type is one or several that formed by connected in parallel. This system includes: condensate supplying and distributing system; gas-liquid two phases flowing and separating system; gaseous phase transmitting and distributing system, liquid phase collecting and storing system; heat exchanging quantity controlling system. The evaporator of heat pipe, condenser, gas-liquid separator, liquid storage, solution circulating pump, liquid distributor, the connecting pipeline and related controlling parts are connected together to form the double cycles controllable heat pipe system. The solution pump, liquid distributor, evaporator and gas-liquid separator are connected together to form independent working fluid cycle, which settle the problems that working fluid carrying capacity is not enough and liquid distribution is uneven.

The invention provides a cloud-computing-technology-based recording and broadcasting system. The system comprises cloud recording and broadcasting all-in-one machines and a cloud recording and broadcasting management center, wherein the cloud recording and broadcasting all-in-one machines are distributed within recording and broadcasting rooms, and used for acquiring and outputting an audio and video signal and a VGA (video graphics array) signal, generating an integrated multimedia courseware, and transmitting the acquired audio and video signal to the cloud recording and broadcasting management center through a network, and asking for the cloud recording and broadcasting management center to monitor and mange the acquired audio video signal; and the cloud recording and broadcasting management center comprises a cloud recording and broadcasting management server and a streaming media server, wherein the cloud recording and broadcasting management server is used for monitoring and managing the recoding process of the cloud recording and broadcasting all-in-one machines of the recording and broadcasting rooms, and the streaming media server is used for providing a recording and broadcasting resource to a far-end user. According to the recording and broadcasting system provided by the invention, the recoding and the managing can be separated from each other, and the remote management can be effectively carried out on the recording and broadcasting process. The invention further provides a cloud recording and broadcasting method correspondingly.

The invention discloses a battery management system of an electric vehicle, which comprises a primary vehicle-body system, a main controller and a battery pack, wherein, the battery pack is formed by more than two batter modules connected in series, the batter modules are formed by connecting more than two single cells in series, each battery module is provided with a battery collecting module, the battery pack is respectively connected with a complete vehicle power system through a discharging relay and a charging relay, the main controller is connected with a previous complete vehicle system through a first optical isolator, and the battery collecting module is connected with the main controller through a second optical isolator. The battery management system has the advantages that: as the battery management system is composed of the main controller (BMU) and the next battery collecting module (LECU), the composition of the system structure is simplified through the main controller and the next battery collecting module, the cost of the hardware of the system can be reduced, and simultaneously, the reliability of the management system can be greatly enhanced.

The invention discloses an intelligent poultry breeding management system on the basis of an internet of things. The intelligent poultry breeding management system comprises an equipment layer, a sensing layer, a network layer, an application layer, a user interface layer and a control alarm module. The equipment layer comprises a moving unit, a poultry breeding cage and controlled equipment, network signals provided by a communication module of the network layer are transmitted to the application layer via an intelligent gateway of the network layer after information is acquired by the sensing layer, and the application layer is responsible for storing data and managing and controlling the system; the user interface layer performs operation control on the application layer and displays the information of the system via the network. The control alarm module receives instructions of the application layer, controls the controlled equipment and transmits an alarm. The intelligent poultry breeding management system has the advantages that environmental conditions required by growth of poultry can be automatically and intelligently provided, so that the poultry can be finely bred, and growth information of each piece of poultry in farms can be timely provided for the public.

The invention discloses a robust controller of a permanent magnet synchronous motor based on a fuzzy-neural network generalized inverse and a construction method thereof. The construction method of the invention comprises the following steps of: combining an internal model controller and a fuzzy-neural network generalized inverse to form a compound controlled object; serially connecting two linear transfer functions and one integrator with the fuzzy-neural network with determined parameters and weight coefficients to form the fuzzy-neural network generalized inverse, serially connecting the fuzzy-neural network generalized inverse and the compound controlled object to form a generalized pseudo-linear system, linearizing a PMSM (permanent magnet synchronous motor), and decoupling and equalizing the linearized PMSM into a second-order speed pseudo-linear subsystem and a first-order current pseudo-linear subsystem; and respectively introducing an internal-model control method in the two pseudo-linear subsystems to construct the internal model controller. The robust controller of the invention has the advantages of overcoming the dependence and local convergence of the optimal gradient method on initial values and solving the problems of randomness and probability caused by using the simple genetic algorithm, obtaining the high performance control, anti-disturbance performance and adaptability of the motor and simplifying the control difficulty, along with simple structure and high system robustness.

The invention provides an integrated method of a plate-shape control system of a plate-strip cold and hot continuous rolling machine. The plate-shape control system comprises a rolled piece plastic-distortion module, a roller-system elastic-distortion module, a rolled piece and roller temperature field module, a roller-system abrasion module, a flatness well-recognition module, a plate-shaped mode recognition module, a plate-shape standard curve module and a plate-shape control module. The invention integrates all modules according to internal relations, can solve a plurality of plate-shape control problems comprehensively and optimally, adopts a set of calculating flows in actual application and effects saves the labor time.

A remote network seal-affixing device able to automatically affix seal under the control of remote signal and with high safety is composed of a box consisting of upper cover, main body, hydraulic cylinder, interface and electromagnetic lock, a sealing moving unit, a sealing holder, a document bearing tray, a seal destroyer, a recognizer, a projector, a camera head, and a control circuit.

This invention relates to a method for monitoring software use, especially for finding out the flow and controlling high speed download software based on P2P, to overcome the shortage of network band width resource illegal occupying, secret disclosing and virus spreading, said invention identifies condition code (keywords) of data package to affirm high speed downloaded software type, breaking off downloading through breaking (or dropping) its TCP handshaking protocol data package.

The invention discloses an ultrahigh-temperature thermal current simulation system used for a spacecraft vacuum thermal test in a vacuum container. The ultrahigh-temperature thermal current simulation system mainly comprises a semi-cylindrical graphite heating array, high-reflectivity high-temperature thermal insulation assembly units, a graphite heating array installing support, an ultrahigh temperature measuring unit and a power-regulator power control unit. A plurality of graphite heating rods are arranged and combined into the semi-cylindrical graphite heating array according to the requirements for the density and uniformity of thermal currents. Each graphite heating rod is composed of a graphite heating body and a graphite electrode, alternating-current electricity supply is adopted, and wiring electrode leads penetrate through a high-current cabin-penetrating electricity supply flange arranged on a container wall of the vacuum low-temperature environment simulation container and are electrically connected with the temperature measuring unit and the power-regulator power control unit respectively. Through the unique design of the graphite heating array, the high-reflectivity high-temperature thermal insulation assembly units and the ultrahigh temperature measuring unit, measurement of and control over temperatures over 1800 DEG C in the space environment simulation container are achieved, and the ultrahigh-temperature thermal current simulation system is also suitable for high-temperature and high-thermal-current environment simulation requirements in vacuum thermal tests of all types of spacecraft.

The invention discloses a double-feed wind power generator stator short circuit current calculating method under the condition of asymmetric faults. The method comprises the following steps: establishing a voltage equation and a flux linkage equation of a double-feed wind power generator, in the form of space vectors under a stator shaft system; establishing stator and rotor current expressions, and establishing a stator positive sequence flux linkage expression after the faults; establishing a rotor positive sequence flux linkage expression after the faults; establishing a stator positive sequence current expression of the double-feed wind power generator under the condition of an asymmetric fall of voltage at a machine end; establishing a stator negative sequence flux linkage expression after the asymmetric fall of the voltage at the machine end; establishing a rotor negative sequence flux linkage expression after the asymmetric fall of the voltage at the machine end; establishing a stator negative sequence current expression after the asymmetric fall of the voltage at the machine end; and finally obtaining a stator current expression after the asymmetric fall of the voltage at the machine end. According to the invention, the problems of affected relay protection and control accessed to a wind power field, affected safe and stable operation of a wind power generator set and the like, caused by lack of research on a simple and effective stator short-circuit current calculation method under the condition of the asymmetric faults in the prior art are solved.

The invention discloses and relates to a cutting force automatic control main shaft reliability test device and a test method, and belongs to the technical field of mechanical test equipment and method. The problems that in the prior art, the real work conditions of a main shaft cannot be accurately and dynamically simulated; the control mode is complicated; the equipment manufacturing cost is high are solved. The main shaft reliability test device consists of a main shaft installing table, a cutting force automatic control device, a cutting torque loading device, state monitoring equipment and auxiliary equipment, wherein the cutting force automatic control device consists of a cutting force magnitude loading mechanism, a cutting force direction regulating mechanism, an electromagnetic locking mechanism and a loading device support frame. The test method of the main shaft reliability test device comprises the following steps: 1, obtaining and processing the load and state parameters; 2, performing detection and debugging on the cutting force automatic control main shaft reliability test device before the work; 3, the cutting force automatic control main shaft reliability test device simulates the work condition loading experiments.

The invention discloses a system and a method for intelligent positioning and monitoring based on wireless communication and a sensor network, which relate to a system and a method for monitoring oil field and mining facilities. The system and the method overcome the defects that a wired networking mode is difficult for wire layout, is difficult to position and is slow to remove fault points, and solve the problems that a portable acquisition device is seriously wore during demounting and mounting, a method for monitoring GSM short messages is lagged and causes loses and the like. The system comprises a sensor module, an actuator module, a ZigBee terminal node, a routing node, a coordinator node module and a local monitoring center server. The monitoring method comprises the following steps that: the sensor module acquires information on the position and the working condition of a monitored object and converts the information into data information; the data information is transmitted to the local monitoring center server through a ZigBee wireless communication network; and the local monitoring center server generates a control command to the monitored object and transmits back the control command through the ZigBee wireless communication network, and the control command is applied to the monitored object by the actuator module.

The invention provides a novel formation control algorithm for a plurality of autonomous mobile robots moving on a two-dimensional plane. According to the algorithm, each robot can independently move to a required position, so that a predetermined geometric formation can be converged. Moreover, the robot formation control algorithm provided by the invention is an optimized method obtained on the basis of a distributed method, so that the problem of wide target formation control can be solved, limit on a special target geometric formation is eliminated, and the control range is extremely wide. According to the algorithm, the convergence can be proved strictly on the aspect of mathematics, and the convergence speed is provided with an upper limit in a synchronization algorithm, so that the algorithm has higher conscientiousness than the conventional control algorithm based on experience and experiments.

The invention discloses a control method for an unbypassed booster fan of a desulphurization system. The control method for the unbypassed booster fan of the desulphurization system comprises the following working conditions: when a unit normally runs, an opening command of a moving blade of the booster fan jointly consists of a regulatory signal of a proportion integration differentiation (PID) regulator and a feedforward signal formed by opening of a stationary blade of a induced-draft fan or the total blast volume of a boiler, wherein the feedforward signal serves as input by the opening of the stationary blade of the induced-draft fan or the total blast volume of the boiler and is obtained through an object transfer function which corresponds to the opening of the stationary blade of the induced-draft fan or the total blast volume of the boiler; when runback (RB) is caused to the unit when equipment trips abnormally, the opening command of the moving blade of the booster fan jointly consists of the regulatory signal of the PID regulator and a control signal formed by the abnormally tripping equipment, wherein the control signal serves as input by current unit load and is obtained through an object transfer function which corresponds to the abnormally tripping equipment. Therefore, the control problem of the booster fan of the desulphurization system when the RB occurs on the unit is solved, so that the inlet pressure of the system can be controlled to be within a proper range by the booster fan when the RB occurs on the unit, and the unit cannot trip due to the fact that the pressure fluctuation is high.

The invention relates to a method for machining a panel (2). According to said method, at least one machining tool (11) is arranged in a working area (50) of a so-called machining surface (2T) of the panel (2); at least one holding element (13) is arranged in a support area (52) located on a so-called holding surface (2M) of the panel (2), opposing the machining surface (2T), and on the opposite side, in relation to the panel (2), to the working area (50); and the operating machining tool (11) and the holding element (13) are displaced on the panel in a co-ordinated manner, according to a movement presenting at least one component tangentially to the surface of the panel, in such a way as to maintain the opposition of the support area (52) and the working area (50) during the displacement of the tool, in order to machine at least part of the machining surface. The invention also relates to a device for implementing said method.

Disclosed are a traffic control method and apparatus. The method comprises: determining whether a network traffic that has been used by a terminal in a time period exceeds a threshold set for the time period; and if the network traffic exceeds the threshold, restricting use of the network traffic for one or more applications in the terminal within the time period. The present invention solves the problem in the prior art that the user needs to perform manual operation to control the traffic of a terminal service application, enables the terminal to automatically control the traffic of the terminal service application, thereby improving user experience.

The invention relates to the technical fields of the solar thermal power generation and energy, in particular to a solar energy and methanol fuel chemical-looping combustion power generation system and method used for controlling CO2 emission. The intermediate-low temperature solar thermochemical process and the chemical-looping combustion power cycle are coupled organically to form the system ofthe invention. The system comprises a solar heat collecting-reduction reactor, a solar heat collecting-decomposition reactor, an oxidation reactor, an afterburning combustion chamber, a gas turbine, a steam turbine, an exhaust-heat boiler, a heat exchanger and the like. By using the device of the invention, the graded use of energy resources with different qualities can be realized; the zero-energy separation of CO2 can be realized through simple condensation; the combustion method can reduce the fuel grade to FeO grade, thus reducing the fuel loss in the combustion process and increasing theefficiency of the system; the solar thermochemical reaction is adopted to improve the grade of intermediate-low temperature solar energy; and afterburning is adopted so as to solve the problem that the gas turbine inlet has low initial temperature caused by the limit of the cycle material in the chemical-looping combustion power system.

The invention provides a device binding method and device. The method comprises a step of obtaining the Bluetooth signal intensity of Bluetooth control equipment scanned by intelligent equipment in a preset range when an equipment binding function is opened, a step of determining the scanned first intelligent equipment whose Bluetooth signal intensity satisfies a preset condition, a step of sending a control command to the first intelligent equipment such that the intelligent equipment performs action of a set type, a step of sending a binding command to the first intelligent equipment when a condition that a user carries out a set first type operation is detected, wherein the binding command is used for indicating the binding relation between the intelligent equipment and the Bluetooth control equipment. Thus, the Bluetooth control equipment can be bound with the Bluetooth control equipment, the intelligent equipment is controlled through the Bluetooth control equipment, the control problem of multiple intelligent equipment can be solved with only one Bluetooth control equipment, in addition, the Bluetooth control equipment can be independent of the intelligent equipment, and thus the intelligent equipment can be controlled in a certain range far from the intelligent equipment.

The invention relates to a common control net for a nuclear power station, which comprises an electrical control subring net, a sub-control subring net and a monitoring layer ring net, wherein the electrical control subring net is used for being connected with a nuclear power station electrical system, and controlling and monitoring the connected nuclear power station electrical system; the sub-control subring net is used for being connected with a sub-system of the nuclear power station, and controlling and monitoring the connected sub-system of the nuclear power station; and the monitoring layer ring net is respectively connected with the electrical control subring net and the sub-control subring net in order to exchange data with the electrical control subring net and the sub-control subring net respectively and sends a corresponding operation command. The technical scheme of the invention solves the problem that the common system can not be controlled, which is generated by different retirement periods caused by different service life in the nuclear power station management; the invention can not be influenced by the set retirement, realizes the network control of the common system, improves the information exchange speed and increases the information exchange volume, reduces operators, improves the operable rate and the usability of the common system, and further improves the economy of the nuclear power station operation.

The invention discloses a periodic adaptive learning control method of an input saturation mechanical arm system. Firstly, an input saturation nonlinear time-delay mechanical arm system model is established; then, a nonlinear time-varying mechanical arm periodic system equation with a Brunovsky standard form is constructed; a tracking controller and a compensatory learning controller are designed; stability and boundedness analysis is carried out according to a composite energy function method, and finally control parameters are selected to achieve real-time adaptive iterative learning torque control over the mechanical arm periodic system. The control method has the advantages of being better in adaptivity, capable of being well used for carrying out compensation on different degrees of saturation input, good in robustness, and capable of being popularized for achieving control over a periodic system without saturation characteristics and and popularized to a nonlinear periodic system without time-delay items; the controllers are easier and more convenient to obtain.