431results about How to "Increase control flexibility" patented technology

In a left ventricular assist device (LVAD) a rotodynamic blood pump (10) is powered by a brushless DC motor (12). A power supply (14) supplies power to the motor (12). Three feedback channels, one for each of voltage, current, and motor speed lead to a microcontroller or microprocessor (18). The three feedback waveforms are analyzed, and from these waveforms, motor input power, patient heart rate, current pump flow rate, and systemic pressure are determined. The microprocessor (18) then calculates a desired flow rate proportional to the patient heart rate. The microprocessor communicates a new power output to a commutation circuit (16), which regulates power to the motor (12). The pump (10) also includes safety checks that are prioritized over desired pump flow. These include prevention of ventricular suction, low pulsatility, minimum and maximum pump speed, minimum speed-relative pump flow, minimum absolute pump flow, minimum and maximum motor input power.

A laser sustained plasma light source includes a plasma bulb containing a working gas flow driven by an electric current sustained within the plasma bulb. Charged particles are introduced into the working gas of the plasma bulb. An arrangement of electrodes maintained at different voltage levels drive the charged particles through the working gas. The movement of the charged particles within the working gas causes the working gas to flow in the direction of movement of the charged particles by entrainment. The resulting working gas flow increases convection around the plasma and increases laser to plasma interaction. The working gas flow within the plasma bulb can be stabilized and controlled by control of the voltages present on the each of the electrodes. A more stable flow of working gas through the plasma contributes to a more stable plasma shape and position within the plasma bulb.

The invention discloses a configuration, refreshing and program upgrading integrated system for an SRAM (Static Random Access Memory) type FPGA (Field Programmable Gate Array), belongs to the technical field of aerospace and aims to solve the problem of SEU (Single Event Upset) of the SRAM type FPGA in a spatial irradiation environment. The configuration, refreshing and program upgrading integrated system has a capability of performing program upgrading on the SRAM type FPGA which is in on-orbit work for a long time. The configuration, refreshing and program upgrading integrated system comprises an on-site programmable logic gate array SRAM type FPGA, a comprehensive management anti-fuse FPGA, a configuration program storage chip PROM (Programmable Read-Only Memory), an on-orbit upgrading program storage chip EEPORM (Electrically-Erasable Programmable Read-Only Memory) and an RS422 interface chip. The configuration, refreshing and program upgrading integrated system disclosed by the invention can be used for effectively solving the problem of the SEU of the SRAM type FPGA which is in on-orbit work for a long time and correcting the SEU and single event accumulation inside the SRAM type FPGA without being shut down, also has the function of on-orbit program upgrading of the SRAM type FPGA, and has the characteristics of instantaneity, reliability, flexibility, universality and low cost.

The invention relates to a steering-mode adjustable electric automobile steering system and a control method. The steering-mode adjustable electric automobile steering system comprises two motors, a mechanical steering module, an electric assisting steering module and a steering-by-wire module, wherein the two motors are arranged on a steering column and a steering pinion respectively, the mechanical steering module, the electric assisting steering module and the steering-by-wire module are formed by three electromagnetic clutches and the like and are used for mechanical steering, electric assisting steering and steering-by-wire. The control method mainly includes the first step of carrying out system initialization, the second step of allowing an ECU to start the corresponding steering mode and carrying out control according to the steering mode selected by a driver, the third step of controlling the steering modes, and the fourth step of carrying out fault diagnosis and fault-tolerant control on the steering system. The steering-mode adjustable electric automobile steering system and the control method have the advantages that the same automobile has high control flexibility on the precondition of being simple in structure, and consequently switching of driving modes can be achieved; when one motor breaks down, an original steering mode can be switched to a steering column assisting type electric assisting steering mode or a pinion assisting type electric assisting steering mode or a mechanical steering mode, and consequently the operation stability, reliability and the fault-tolerance capacity of the automobile are improved.

The invention discloses a dual-redundancy attitude control system of a coaxial unmanned helicopter, which consists of a serial communication module, a PCM (Pulse-Code Modulation) decoding module, an AD acquisition module, a PWM (Pulse-Width Modulation) output module and a CPU control module. The serial communication module, the PCM decoding module and the AD acquisition module are used as system input, the CUP control module carries out improved digital PID control, and the PWM output module carries out output in the form of PWM pulses, and thus, the control of a backward-stage high power valve is realized. A debug method comprises the following fives steps of: firstly, connecting a defined I/O port to a high or low-level end according to a parameter debug object; secondly, adjusting a potentiometer to provide initial parameters for Kp and Kd and controlling the backward-stage high power valve; thirdly, keeping a neutral position of Futaba unchangeable, adjusting the potentiometer so that a steering engine achieves a critical state of self-excitation vibration; fourthly, operating the Futaba to output a signal exceeding a pulse threshold; and fifthly, operating the Futaba to return to a central position. The method realizes the debug and the storage of relevant parameters, decreases interference and improves the system stability and the response speed.

The invention discloses an MMC (modular multiple converter) type multi-port power electronic transformer applied to an alternating current/direct current hybrid power distribution network. The multi-port power electronic transformer comprises an input level, a middle level and an output level, and are equipped with four kinds of universal interfaces: a high-voltage alternating current interface, a high-voltage direct current interface, a low-voltage alternating current interface and a low-voltage direct current interface; the input level refers to the MMC; the middle level refers to an isolating dual active full-bridge DC/DC converter; and the output level refers to a three-phase four-wire-system full-bridge inverter. Except the basic functions of voltage transformation, isolation, energy transfer and the like as a common transformer, the transformer provided by the invention can realize access of voltages of various forms with the multiple working modes, can perform functions of power flow control, electric quality adjustment and the like; and therefore, an intelligent power distribution network interface with higher applicability is configured.

An exemplary power inverter comprises a push-pull inverter circuit that includes a transformer having a primary winding coupled to a DC bus and a secondary winding coupled to an AC bus, main power switches coupling each end of the primary winding to a DC return, and one or more supplemental power switches coupling at least one end of the primary winding to a snubber bus. The supplemental switch at a given end of the primary winding forms a buck-mode converter in combination with the primary winding and the associated free-wheeling diode at that end of the primary winding, and can be controlled by a switching controller to effect energy transfer between the snubber bus and DC bus. The switching controller can be configured to control power flow between the DC, AC, and snubber buses by controlling the common-mode and differential-mode voltages of the primary winding via main/supplemental power switch control.

The present invention discloses a method for the command line interface authorization grading. The procedure comprises that the authorization of the user operation command line interface equipment is divided into various grades; the command tree view opposite to the authority is provided to the user according to the various authorization grades. Correspondingly, the present invention also provides a command line interface authorization grading system. The present invention solves the problem that the authorization grade in the existing command line interface authorization management is not delicate and the configuration is not flexible, what you See is what you get, and the user operation is very convenient. At the same time, the present invention satisfies the security application requirement based on the command line configuration, prevents the unauthorized user to consult or change the equipment configuration information beyond the authorization scope, and guarantees the security and the normal running of the equipment.

The invention relates to a method for controlling energy storage converters in a large-scale off-grid micro-grid. The method includes the steps of firstly, setting up the large-scale off-grid micro-grid; secondly, conducting primary frequency modulation on the off-grid micro-grid by means of an energy storage power station through a Droop work mode; thirdly, conducting secondary frequency modulation on the off-grid micro-grid; fourthly, conducting thrice frequency modulation on the off-grid micro-grid through a micro-grid energy management module; fifthly, conducting master and slave control on the multiple energy storage converters in the energy storage power station. According to the method, by means of flexible control over the energy storage converters, the problem of reliable power supply for independent power supply systems in remote electricity-free areas or island grids or other areas can be effectively solved, and the power supply systems can independently run in a safe, stable and economical mode. The method is applied to the multi-energy complementation alternating current bus shared type off-grid micro-grid, the multi-machine parallel operation of the energy storage power station is achieved through high-speed master and slave communication in the energy storage power station, and safe, stable and economical running of the micro-grid is achieved through interstation peer-to-peer control of the energy storage power station.

The invention discloses a linear constant-current and current-sharing LED drive circuit and a circuit board structure thereof, relating to a drive circuit of a vehicle LED illuminating device and configuration of elements of the drive circuit. The linear constant-current and current-sharing LED drive circuit comprises a reference voltage unit, a constant current feedback unit and a multi-channel sampling and current sharing unit, wherein the multi-channel sampling and current sharing unit is correspondingly connected to all channels of LED strings of the multi-channel LED light emitting module; all channels of current sampling feedback ends are connected in parallel to the feedback signal input end of the constant current feedback unit; and LED currents are automatically regulated according to an LED gear resistor arranged on an LED circuit board, one constant current feedback unit is used for controlling the currents of the multiple channels of LED strings, has multiple functions of constant current, current sharing, LED gear and PWM (Pulse Width Modulation) dimming, and can meet various practical demands in electronic illumination of automobile; and the complexity of design and production of the LED drive circuit is greatly lowered, and error probability is lowered. Any parameter of any element on the control circuit board is not needed to be changed in a production or maintenance process, high interchangeability of the circuit board can be realized, and the production efficiency is increased.

The invention relates to a steel tube concrete arch bridge hoisting construction method, belongs to the technical field of bridge construction, and discloses a steel tube arch bridge towerless buckling three-section type double-rib folding hoisting construction method. The method includes the following steps of 1, arch rib pre-assembly, 2, ground anchor arrangement, 3, single-floating-crane transportation, 4, single-edge segment adjustment to be close to design angles through a floating crane, 5, buckling system installation, 6, repetition of the steps 3, 4 and 5 and installation of the other section of a single-edge segment, 7, double-floating-crane transportation, and 8, folding and welding. The method improves production efficiency, accelerates construction, saves engineering cost, and guarantees arch rib installation quality.

The invention discloses a control method and device for an intelligent home appliance and a terminal. The method comprises the following steps: storing a control interface of the intelligent home appliance; acquiring identity recognition information of the intelligent home appliance, and entering the control interface matched with the identity recognition information; and controlling the intelligent home appliance according to a preset control mode on the control interface. Through the scheme, the defects of stiff control way, inconvenience in use, poor user experience and the like in the prior art can be overcome, and the beneficial effects of flexible control way, convenience in use and good user experience are achieved.

A method for controlling the aggregate interference of a secondary system (10) in a cognitive radio network comprises the steps of computing the power density (Pd,i), footprint (Afoot,i) and service area (Ai) for each of the cells (100) of the secondary system (10) that satisfy the interference constraint at a given point (P) in a primary system (50); summing the power densities (Pd,i) for all cells (100) for the point (P); and using the sum of the power density at the point (P) to decide which power level a new secondary system (10) user is allowed to use in a given cell (100). A system for performing such a method is also disclosed.

The invention discloses a pulse-combustion control method of a steel rolling heating furnace, namely at least four gas nozzles are arranged at the two sides of the heating furnace and located at the upper and lower parts of blanks in the blank along the length direction of the oven, thus whole-side-burning is formed for the heating furnace, the pulse of opening and closing of the whole gas nozzles is finished in T time and T is taken as a cycle period, each gas nozzle is opened at Ts interval successively, the quantity of the gas nozzles is N, thus in a pulse cycle period Ts=T/N, each gas nozzle open pulse order is set as required and opened by rated heating efficiency, each gas nozzle open pulse time is T1, T2...TQ, and the each gas nozzle open pulse time T1, T2... and TQ are calculated by the PID controller of the heating furnace control system according to the set value and the measured value of the furnace temperature. The pulse-combustion control method provided by the invention has the advantages of improving the furnace-shape, balancing the workload of the gas nozzle, improving fuel burn-off rate, strengthening the heat transfer efficiency of the blank, saving the fuel loss and improving control accuracy and flexibility of the furnace temperature, and is convenient in maintain and operation.

The invention discloses a robot suitable for long and narrow tunnel autonomous obstacle avoidance. The robot comprises a trolley body, a swing arm motor, walking motors, walking tracks, front swing arms, linkage foldable arms and a camera; the walking tracks are arranged on the two sides of the trolley body correspondingly; the trolley body is provided with the linkage foldable arms; the camera is arranged at the upper end of the linkage foldable arms; the two sides of the front end of the trolley body are each provided with the corresponding front swing arm; the walking track and a swing arm track on one side of the trolley body are driven by the corresponding walking motor on the same side; the swing arm motor is connected with track driving wheels correspondingly arranged on the two sides of the front end the trolley body through swing arm transmission shafts; and the track driving wheels and swing arm driving wheels on the two sides of the trolley body are correspondingly coaxial and are connected with the front swing arms on the two sides of the front end of the trolley body correspondingly. By means of the robot suitable for long and narrow tunnel autonomous obstacle avoidance, the flexible control and autonomous obstacle avoidance capacity of the tunnel robot under a long and narrow tunnel environment is improved and the control problems that communication under a complicated tunnel environment is not smooth, image transmission is not clear, and autonomous obstacle avoidance cannot be performed are solved.

The invention discloses an automatic temperature control moxibustion instrument. The moxibustion instrument is composed of a support, a moxa stick position adjusting device and a temperature sensor. The moxa stick position adjusting device and the temperature sensor are arranged on the support. The temperature sensor is in electric connection with the moxa stick position adjusting device. A moxa stick is arranged on the moxa stick position adjusting device. The temperature sensor is arranged to be close to a combustion portion of the moxa stick. The moxa stick position adjusting device is used for adjusting relative positions of the moxa stick and the temperature sensor according to readings of the temperature sensor. The automatic temperature control moxibustion instrument and a control method of the automatic temperature control moxibustion instrument have the advantages that the instrument can automatically carry out moxibustion treatment, labor intensity of medical staff is reduced, control flexibility is high, the artificial treatment technique can be highly simulated and the treatment effect can be ensured.

The present invention provides an integrated steering drive axle for a vehicle and an electric vehicle. The integrated steering drive axle includes an integrally rigid axle beam arranged to extend between the two wheels along the lateral direction of the vehicle, and two motor drive systems mounted at the axle beam, wherein each motor drive system can independently drive a corresponding one of the two wheels to rotate and turn; wherein each motor drive system includes: a first drive electric motor, arranged separately from the corresponding wheel; a first transmission mechanism, arranged between the first drive electric motor and the corresponding wheel and used for transferring the output power of the first drive electric motor to the corresponding wheel to drive the corresponding wheel to rotate; and a second drive electric motor, used for providing steering power necessary for steering the corresponding wheel. According to the present invention, the two motor drive systems for independently driving the wheels at opposite sides are mounted at the integrated steering drive axle, thereby improving the control flexibility of the vehicle and achieving independent driving and independent steering of the wheels.

The invention discloses a charging control method and device and a terminal device. The method comprises following steps of receiving an operation triggered by a user, wherein the operation is triggered when the terminal device is charged through a charger; judging whether the operation satisfies a preset rapid charging triggering operation; when the operation satisfies the preset rapid charging triggering operation, detecting the electric quantity of the terminal device; and when the electric quantity is lower than a first threshold value, charging the terminal device in a rapid changing mode. Through adoption of the method and the devices, the defect that the specific demand of the user cannot be satisfied only through adoption of a normal charging mode to charge the terminal device is overcome; and through extending the charging mode, the charging control flexibility of the terminal device is increased.

The invention provides an equipment control method and device based on the Internet of Things, a computer program product and a computer readable storage medium. The method comprises the following steps: establishing communication connection with a plurality of pieces of Internet of Things equipment mounted on bearing equipment through a gateway corresponding to the bearing equipment, and acquiring operation data of the Internet of Things equipment based on the established communication connection; displaying the operation data of the Internet of Things equipment in a data view corresponding to the bearing equipment; acquiring a cross-device calling event set in the data view; and when the operation data of the source Internet of Things equipment meets a data triggering condition in the cross-device calling event, sending a control instruction for the target Internet of Things equipment in the cross-device calling event to the target Internet of Things equipment based on the communication connection so as to control the target Internet of Things equipment. According to the invention, the method can improve the control efficiency and flexibility of the IOT equipment, and reduces theworkload.