42results about How to "Flexible control strategy" patented technology

The present invention relates to a method and apparatus for controlling user data streams in an SDN (Software Defined Network) network, and a method and apparatus for assistantly controlling user data streams in an SDN (Software Defined Network) network. The method for controlling user data streams in the SDN controller in the SDN network includes the following steps that: user attribute information is obtained from a user information database through an Ss interface between the SDN controller and the user information database; and the user data streams are controlled based on the user attribute information. According to the methods and apparatuses of the invention, through the newly added interface between the SDN controller and the user information database, the SDN controller can obtain the user attribute information, and therefore, the SDN controller can control the user data streams according to the user attribute information. With the methods and apparatuses of the invention adopted, customized services can be provided for a user; flexible control strategies for the services can be realized based on user attributes, so that better user experience can be brought to the user; and the SDN controller can control the user data streams according to the user attribute information, and therefore, the utilization of network resources can be optimized, and network flexibility can be enhanced.

The invention discloses a software-defined network controller system in a named data network and a method thereof. The system separates the control plane and the data plane of the named data network. The software-defined network controller system includes: a storage module for storing The data plane maintains four data structures of the topological structure of the data plane, the rule table, the push table and the routing table. The control plane uses these data structures to control the forwarding of data streams in the named data network; the communication module uses self-defined communication The format establishes the connection between the software-defined network controller of the control plane and the network device of the data plane and maintains the connection, receives and processes the data stream sent by the named data network; the function module API is used to store the module Function encapsulation, the application layer uses the function module API to operate the storage module to control the direction of the data flow.

The invention discloses a fault-tolerant power generation system and a control method thereof for an electric excitation double salient pole motor for demagnetization fault. The system consists of excitation power circuit, excitation power supply, main power circuit, main power supply, controller, energy storage capacitor, load, electric excitation double salient pole motor and position sensor, in which the main power circuit is composed of three sets of H-bridge converters connected in parallel constitute. By detecting the excitation current value in real time, when the loss of excitation fault is detected, the excitation power supply is cut off, and the system switches from the normal excitation operation mode to the fault-tolerant operation mode of the loss of excitation fault. The armature current required for power generation operation is used to realize the fault-tolerant operation function of the motor loss of excitation fault, which improves the reliability of the electrically excited double salient pole motor in various environments, and is suitable for use in aerospace, automotive and other industries.

The invention provides a digital-type hysteresis control current source, which comprises a rectification transformer unit, a stable current unit and a load unit; the rectification transformer unit comprises a transformer and an H-type full-bridge uncontrollable rectifier; a municipal power alternative-current voltage is converted by the rectification transformer unit into a direct-current voltage after being boosted and rectified, and the direct-current voltage is inputted to the load unit after being inputted to the stable current unit by an inversion unit; and a signal collection unit transforms a collected current signal of the load unit into a voltage signal, and then the voltage signal is inputted to a micro processing unit (MCU) after being amplified and inputted to an analog-digital (AD) conversion unit to process. By adopting the digitalized control, the temperature drift is small, the interference resistance is strong, the stability is good, and the reliability is high; a digital-type part has a firm structure, small size and light weight and is easy to standardize, and the control strategy is flexible; and the performance is excellent, the digital-type hysteresis control current source is more stable to run and is easy to upgrade and maintain.

The invention relates to a safety brake and redundancy control system of a mine hoist. Detection signals of a roller rotation speed sensor and a motor rotation speed sensor are input into a speed redundancy detector, the processed detection signals are input into a speed signal comparer, compared with a command signal, and then input into a speed closed-loop controller, the speed closed-loop controller transmits the signals to a pressure signal comparer and a pressure feed-forward controller, the pressure signal comparer compares a signal of a pressure sensor and an output signal of the speed closed-loop controller, a comparison result is input into the pressure speed closed-loop controller, and a signal of the speed closed-loop controller is input into an adder through a switch to form a control signal of a tee proportional depressurization valve; and when the pressure sensor is cut off, the output signal of the speed closed-loop controller is input into the adder after being processed by the pressure feed-forward controller, and an output signal of the adder controls the tee proportional depressurization valve, so that the braking torque is controlled. The safety brake and redundancy control system is high in control precision and response speed, and the mine hoist can brake at constant retarded velocity.

The invention provides a three-phase medium-low voltage integrated power distribution network voltage control method and system. The method comprises the steps of: reading original data of a power distribution network, establishing an uncertainty probability model of output and load of a distributed power supply, performing initial probabilistic load flow calculation by utilizing a two-point estimation method to obtain statistical data of the node voltage and the objective function of each phase, determining whether a voltage out-of-limit problem occurs in medium-voltage and low-voltage regions or not, and if not, returning to enter the next control period; otherwise, on the basis of probabilistic load flow calculation, establishing the three-phase voltage control model of the medium-low voltage integrated power distribution network, performing solving by using a genetic algorithm to obtain a regulation and control value of each control variable, and further controlling the medium-lowvoltage integrated power distribution network. The active control capability of the low-voltage power distribution network is fully utilized, the low-voltage power distribution network is coordinatedand controlled with the medium-voltage power distribution network to solve the problem that an original low-voltage power distribution network is passively controlled by the medium-voltage power distribution network, and the operation efficiency and the operation safety of the power distribution network are improved.

The invention discloses a vehicle thermal management control method. The control method includes: acquiring temperature information of a target vehicle; determining a thermal management mode of a motor circuit of the target vehicle according to the temperature information; corresponding to the thermal management mode according to the thermal management mode The calculation method and the temperature information calculate the target control amount of the temperature control equipment, the temperature control equipment includes water pumps and fans, and the target control amount includes the water pump target control amount and the fan target control amount; according to the target control amount control The temperature control equipment operates. The invention also discloses a thermal management controller and a control system with the controller. The invention can actively control the temperature control equipment of the motor circuit, and has the advantages of improving work efficiency, saving energy, reducing NVH noise, and the like.

The invention provides a method and a device for controlling output voltage of a DC (direct current) / DC converter. The control method comprises steps as follows: a corresponding first judgment value of output voltage and a corresponding second judgment value of output voltage are acquired respectively according to a real-time temperature value of a low-voltage storage battery and a real-time SOC (state of charge) value of a high-voltage power battery; whether the real-time SOC value of the high-voltage power battery is larger than a set threshold is judged, if yes, the first judgment value of the output voltage is taken as a set instruction value of the output voltage, and otherwise, a smaller one of the first judgment value of the output voltage and the second judgment value of the output voltage is taken as the set instruction value of the output voltage; whether the set instruction value of the output voltage is in a voltage regulating range of the DC / DC converter, if yes, the set instruction value of the output voltage is taken as the output voltage of the DC / DC converter, and otherwise, an upper limit value or a lower limit value of the voltage regulating range of the DC / DC converter is taken as the output voltage of the DC / DC converter. The output voltage of the DC / DC converter can be intelligently adjusted according to the characteristics of the high-voltage power battery and the low-voltage storage battery.

The invention discloses an intelligent magnetic biasing detection and processing device for an inversion welding power supply. The intelligent magnetic biasing detection and processing device comprises a sensor and signal conditioning module, an adder / subtracter module, a proportion adjuster, a comparator, a controller input signal conditioning module, a digital controller and an adjustment voltage input module, wherein the sensor and signal conditioning module for acquiring welding current sends a signal to the adder / subtracter module; the adjustment voltage input module sends a signal into the adder / subtracter module; the signals are processed by the adder / subtracter module and then sent to the comparator; current on the primary side of a main transformer is processed by the sensor and signal conditioning module and then sent to the proportion adjuster; the proportion adjuster sends the signals to the comparator; the comparator compares the signals sent by the adder / subtracter module and the proportion adjuster, and sends the signals to the controller input signal conditioning module; and the controller input signal conditioning module sends the signals to the digital controller. The intelligent magnetic biasing detection and processing device has high stability and reliability and high generality.

The invention discloses a power supply digital control development platform which comprises a platform external interface, an input signal conditioning circuit, a power drive output circuit, a switch control output circuit and a DSC minimum system, wherein the platform external interface at least is taken as an interface between an input signal and an output signal of the development platform; the input signal conditioning circuit correspondingly and adaptively conditions a power supply analog signal and a binary signal form the platform external interface; the power drive output circuit outputs power transistor switch control signals computed and output by the DSC minimum system to the platform external interface after the power transistor switch control signals are subject to adaptive drive capability treatment; the switch control output circuit outputs the switch control signals computed and output by the DSC minimum system to the platform external interface after the switch control signals are subject to adaptive treatment; the DSC minimum system is taken as a carrier of embedded software through taking DSC as a core processor during the development to bear the operating environment of the embedded software. The invention realizes the full-digital control and has strong expansibility and good control performance.