42results about How to "With redundant function" patented technology

The invention discloses an active and passive compound control system for a hybrid power hydraulic excavator. According to the active and passive compound control system for the hybrid power hydraulic excavator, a control circuit comprises a hydraulic pump A, a hydraulic pump B, a hydraulic pump C, a movable arm cylinder control valve bank, a bucket rod cylinder control valve bank, a bucket control valve, a rotation control valve, a rotating motor control valve bank, a two-position and two-way valve I, a two-position and two-way valve II, a two-position and two-way valve III, a two-position and two-way valve IV, a two-position and two-way valve V, a two-position and two-way valve VI, a two-position and two-way valve VII, a two-position and three-way valve I, a two-position and three-way valve II, an energy accumulator I and an energy accumulator II, an open type control circuit is adopted to serve as the control circuit, the two cavities of a hydraulic cylinder are each controlled through a power source, and the pressure and the flow of each cavity are regulated independently. The active and passive compound control system for the hybrid power hydraulic excavator has the multiple technical advantages that the energy efficiency is high, the degree of integration is high, power consumption is low, power supply redundancy is avoided, a pilot oil source is not needed, the noise is low, and kinetic energy recovery and potential energy recovery are integrated.

The invention relates to a steering redundancy and integrated control system and method of a four-wheel independent driving electric automobile. The control method comprises the steps that a differential action power reference curve is determined by an automobile controller according to the steering wheel hand power demands of a driver; an electric power steering module obtains a power torque command according to the measured steering wheel rotating angle data and sends the power torque command to an EPS (Electronic Power Steering, electronic power steering system); a differential action powersteering module utilizes the differential action power reference curve to obtain a front axle differential action torque of the electric automobile according to the measured data; a reference yaw angle velocity is obtained according to the measured automobile practical yaw angle velocity, the steering wheel rotating angle and the automobile speed data, and accordingly the additive yawing moment is obtained; and the automobile controller utilizes the front axle differential action torque and the additive yawing moment to obtain a four-wheel driving motor target output torque. Compared with theprior art, the steering redundancy and integrated control system and method have the advantages that the individualized demands of the driver can be met, the driving safety of the automobile is improved, and the manipulation burden of the driver is relieved.

The invention discloses a lifting device gravitational potential energy pressure-volume storage system. According to the system, an electro-hydraulic compound energy recovery system is additionally arranged based on a lifting mechanism hydraulic cylinder inlet and outlet oil port system and is further composed of a hydraulic motor/pump, a motor/electric generator, a super-capacitor module and an energy accumulator. An inlet/outlet oil port of the hydraulic motor/pump communicates with a lifting hydraulic cylinder through a control valve, and the other oil port of the hydraulic motor/motor communicates with the energy accumulator. An output shaft of the hydraulic motor/pump is connected with an output shaft of the motor/electric generator. The super-capacitor module is connected to a rotary speed controller DC bus of the motor/electric generator. According to the lifting device gravitational potential energy pressure-volume storage system, the gravitational potential energy in the dropping process of the lifting mechanism is stored into the energy accumulator and a super-capacitor without throttling losses through the hydraulic motor/pump and the motor/electric generator, the part of energy stored can be recycled without throttling losses, machine working efficiency is improved, operating cost is reduced and emission pollution of an engine is reduced.

The invention relates to the technical field of automobile braking and particularly discloses an electric power-assisted braking system used for an automobile. The electric power-assisted braking system comprises a braking force output hydraulic module, a braking force input mechanical module, an electric power-assisted input module and a control assembly. The electric power-assisted input module comprises a motor, a transmission module and a sensor. The braking force input mechanical module directly acts on the braking force output hydraulic module through a coupler. The motor is connected with the coupler through the transmission module. The control assembly is used for setting a control strategy and is in electrical signal connection with the motor and the sensor. According to the electric power-assisted braking system used for the automobile, the modular design is adopted, the braking response time is shortened, the braking reliability and the braking efficiency are improved, and the occupied space is reduced; the braking system is provided with a protection unit with redundant measures and has a driver pedal force braking way and a motor braking way, and a traditional operation mode by a driver is retained; and the control mode can be adjusted, man-machine interaction can be conducted, a plurality of driving styles are provided, and the electric power-assisted braking system can meet the braking requirements of automatic driving and can further be matched with a regenerative braking system to achieve braking together.

The invention discloses a method for controlling a parallel power generation system. The controlling method comprises the steps that: an amplitude limiting unit is added to a control channel on the double closed-loop foundation of a traditional voltage outer loop and a current inner loop; output values of a voltage regulator are processed via the amplitude limiting unit into output current set values; amplitude limiting values of a slave-module amplitude limiting unit are dynamically adjusted; when a main module normally operates, the amplitude limiting values of the slave-module amplitude limiting unit are equal to the output values of the main module amplitude limiting unit; the output current set values of the main module and the slave module remain the same to realize the synchronous operation of the main module and the slave module and to reach the current-sharing control. When the main module is broken down, a module having the lowest output current reference value is confirmed into the main module to realize the main-slave switch.

A single-probe three-coil maglev train gap sensor with a fault location function comprises controllable high-frequency switches which are each connected with a high-frequency signal source on a train body, probe coils which are each connected with one controllable high-frequency switch, signal detection circuits which are each connected with one probe coil, and a self-diagnosis unit connected with the signal detection circuits. The input ends of the three detection coils inside sensor probes are respectively connected with the three high-frequency signal sources through the three controllable high-frequency switches; the output ends of the three detection coils are respectively connected with the signal detection circuits which are independent of one another; the controllable high-frequency switches and the signal detection circuits are connected with a timing controller (T); and the three signal detection circuits output three independent air gap detection values. When there is a single-channel detection fault, the fault diagnosis unit outputs fault location information and indicates the position of a detection channel where the fault occurs. When a single channel fails, an effective real air gap value can still be provided. The single-probe three-coil maglev train gap sensor has a redundancy function.

The invention discloses a multi-power-source series-connection type hybrid power unmanned aerial vehicle and a control method thereof. The unmanned aerial vehicle comprises a vehicle body, a left wing, a right wing, a left aileron, a right aileron, a left flap, a right flap, an empennage, a left wing motor, a left wing propeller, a right wing motor, a right wing propeller, a standby propeller module, a horizontal stabilizer, a vertical stabilizer, an elevator, a rudder, an engine, a clutch, an inverter, a power generation/electric all-in-one machine, a storage battery pack, a super-capacitor,an oil tank, a temperature sensor, a pressure sensor, a state-of-charge estimation module and a control module. Enough cruising ability and high maneuverability of the unmanned aerial vehicle can be guaranteed; and meanwhile, the standby propeller module is arranged on the empennage, so when a driving mechanism of the unmanned aerial vehicle breaks down, an engine drives the standby propeller to drive the unmanned aerial vehicle, the situation that the system has a certain redundancy function is guaranteed, and the survival capacity of the unmanned aerial vehicle is greatly improved.

The invention discloses a linear motor driving type plunger pump provided with multiple motion units. When a servo controller drives a linear motor to reciprocate in a special motion plan, plungers at one end are in water absorption working conditions, a suction valve in a corresponding integrated flow distribution valve is opened, and fluid is sucked into working medium from a total water suction pipe of a system through a flow guiding channel inside a cylinder body; and plungers at the other end are in a water discharging working condition, a delivery valve in the corresponding integrated flow distribution valve is opened, and the fluid is discharged from the working medium from a total water outlet pipe of the system through the flow guiding channel inside the cylinder body. When multiple linear motor motion units are in coordinated operation, the linear motor motion units respectively operate by being staggered for 90 degrees in phase difference according to a triangular wave motion curve, so that formed combined flow of the system can reach a stable value. The linear motor driving type plunger pump system is applicable to a hydraulic system with seawater, freshwater, mineral oil and the like as a working medium and has a broad application prospect in the fields of naval vessels, deep sea exploration and the like.

The invention discloses an EHA drive plunger pump and a control method thereof. The EHA driving plunger pump is composed of cylinder bodies, integrated flow distribution valves, a water outlet main pipe, oil distribution boxes, oil circuit blocks, servo motors, a base, a water inlet main pipe, cylinder barrels, pump set plungers, hydraulic cylinders, a supporting plate, hydraulic cylinder plungerrods, rod end ball bearings and the like. The EHA driving plunger pump adopts EHA as a driving device, the movement of the hydraulic cylinders are controlled through the bidirectional hydraulic pumpsso as to drive the pump set plungers to move, and the function of water suction and drainage is realized; through servo control, the positive rotation, reverse rotation and speed regulation operationof the motor can be controlled. When the pump set plungers reciprocate in a specific motion planning mode, one ends of plungers are in a water absorption working condition, the suction valve in the corresponding integrated flow distribution valves are opened, and the fluid is sucked into the working medium from the system main water suction pipe through flow guide channels in the cylinder bodies.According to the EHA drive plunger pump and the control method, the complex working condition of the ship pump can be met, and the application prospect of the EHA driving plunger pump system in the fields of naval vessels, deep sea exploration and the like is greatly improved.

The invention relates to a real-time switching method and a device for VPNs (Virtual Private Networks) and GPRS (General Packet Radio Service) networks. The method comprises the following steps of: 1) acquiring communication state information of the VPN of all RTUs (Remote Terminal Units) in real time by a PLC (Programmable Logic Controller) master station; 2) judging whether the communication of the VPNs of all the RTUs is normal, if so, executing a step 3), and if not, executing a step 4); 3) maintaining a connecting channel of a data registering area and a main data area of the VPNs, adopting uploaded data of the VPNs as operation and display data and returning the step 1); and 4) if the communication of the VPN of certain RTU is abnormal, enabling data connection of the RTU on the main data area of the PLC master station to point at the data registering area of the GPRS immediately, and returning to the step 1). The device comprises the PLC master station, a first GPRS antenna, a core switch, the GPRS network, the VPN and the RTU. Compared with the prior art, the invention has the advantages of high efficiency, stability, reliability and the like.

The invention relates to an infrared hot spot detection device, and belongs to the infrared monitoring equipment field; the infrared hot spot detection device comprises an infrared temperature-test sensor control cabinet and a sensor fixing mechanism; the infrared temperature-test sensor control cabinet comprises a data gatherer, a cooling airflow switch, a filter pressure-reducing valve and an oil stain separator; the sensor fixing mechanism comprises an electric performer, a mounting plate, a pipeline, a protection cover, an infrared probe assembly and an optical lens; the infrared probe assembly comprises at least one infrared temperature-test sensor; the data line of the infrared temperature-test sensor is connected on a terminal of the infrared temperature-test sensor control cabinet;the first air route is connected with the cooling airflow switch through a pipe; the electric performance is connected with the second air route and the protection cover; the second air route is connected with the first air route through the infrared probe assembly; a water inlet pipe winds the infrared probe assembly and is connected with a water outlet pipe; the optical lens is arranged betweenthe infrared probe assembly and the protection cover; the multi-branch infrared redundancy mode is employed, thus more reasonably and accurately gathering data; the water cooling and blowing can effectively solve the dusting and high temperature problems.

The invention provides a cascade module unit applied to a power electronic transformer. The cascade module unit comprises a power module, a power unit board, a thermal management component, a currentdetection component, a redundant loop component, a loop connection component and a module shell, adopts a cascade H-bridge CHB topology, and adopts a star connection method to perform multi-module series connection. The cascade module unit solves the problem of insufficient withstand voltage of a single power electronic device IGBT. The cascade module unit has the advantages that the modular degree of the internal components is high, and the assembly is convenient; the whole module is convenient to assemble, electrical connection can be rapidly achieved, and a hot plug function is achieved; the air volume of a fan is utilized to the maximum extent, and the overall module cooling efficiency is high; a redundancy function is achieved, and the reliability of the system is high; the volume weight is small, and the power density is high; and the overall demetallization degree of the module is higher, the creepage distance and the electrical gap are ensured, and the safety of the module unitis high.

The invention provides an anti-folding control system for a semi-trailer; vehicle parameters are measured through a sensor, and the vehicle speed, the road adhesion coefficient and the ideal yaw velocity are estimated; an intervention threshold value is set, an anti-folding control program sets three folding angle threshold values and a folding angle speed threshold value to serve as the distinguishing basis of the active braking strategy, the size relation among the three folding angle threshold values is sequentially decreased, and the first folding angle threshold value is the maximum value in the three threshold values; the anti-folding control system architecture adopts electric and pneumatic double-loop control and has a redundancy function; and brake action control over corresponding wheel brake chambers is achieved through a tractor rear axle double-channel bridge control valve and a semitrailer double-channel bridge control valve, and the state of brake air pressure is controlled, namely pressure increasing, pressure maintaining and pressure reducing. By reducing the output torque of an engine and implementing combined intervention of active braking, the folding instability working condition of the semi-trailer is effectively prevented, and posture correction of the folding instability working condition of the semi-trailer is achieved.

The invention relates to a dynamic voltage compensation device for an AC/DC hybrid power distribution network and a control method thereof. The device comprises an A-phase rectification transformation module, a B-phase rectification transformation module and a C-phase rectification transformation module which are electrically connected with one another; each of the A-phase rectification transformation module, the B-phase rectification transformation module and the C-phase rectification transformation module comprises: a high-voltage input side electrical wiring terminal, an electric reactor, a plurality of power units of which the input sides are connected in series and a plurality of isolation transformers of which the primary sides are electrically connected with the output sides of the power units respectively; the power units at the tail ends of the A-phase rectification transformation module, the B-phase rectification transformation module and the C-phase rectification transformation module are electrically connected with one another, and the isolation transformers at the tail ends are electrically connected with one another; the input side outgoing line terminals of the power units at the tail ends are short-circuited together to form a high-voltage neutral point N; and the direct current bus leading-out terminal of one power unit at the tail end is used as a low-voltage direct current output side negative wiring terminal and a low-voltage direct current output side positive wiring terminal.

A CPCI power supply based on data collection and monitoring is composed of a backboard connector, a redundancy control unit, a filter circuit unit, an isolation voltage conversion unit, an collectionamplification unit, an AD conversion unit, a temperature sampling unit, an MCU processing unit, an RS485 communication unit, an indicating lamp and a digital display unit. Double-path isolation voltage output has a redundancy function; a monitoring circuit on the board card monitors the voltage, the current and the temperature in real time, displays the voltage, the current and the temperature ona nixie tube in real time, and transmits the voltage, the current and the temperature to a host system for analysis and storage through an RS485 data communication channel; and an indicator light on the power panel displays operation and fault states.

The invention relates to the field of power electronics, and particularly provides a parallel module unit applied to a power electronic transformer, which comprises a power module (IGBT), a power unit board, a thermal management assembly, a flexible connection assembly, a fusing loop assembly and a module shell, adopts SCR-DAB topology, and adopts a parallel connection mode to share a direct current bus by multiple modules. The problem of insufficient current-carrying capacity of a single module is solved, and bidirectional energy flow is realized. The modularization degree of internal components is high, and production is convenient; due to the design of a guide rail type base, electrical connection can be rapidly achieved, and the maintainability is high; a flexible socket connection mode is adopted, so that a hot plug function is realized; due to a double-air-duct structure, the overall heat dissipation efficiency of the module is high; the size and weight are small and the power density is high; and a sheet metal part and an insulating part are matched for use, so that the mechanical performance and the electrical performance are effectively guaranteed, and the safety of the module unit is high.

The invention provides a PLC motion control panel which comprises a master control processor, at least one power chip, an Ethernet interface unit, a bus interface unit and an indication unit; the power chip is connected with the master control processor, and supplies power to the master control processor; the Ethernet interface unit is connected with the master control processor and comprises at least one Ethernet interface; the bus interface unit is connected with the master control processor, and used for bus communication; the indication unit is connected with the master control processor,comprises at least one indication component, and is used to indicating a work state of the PLC motion control panel; the master control processor comprises an ARM+FPGA embedded double-core chip; and the Ethernet interface unit include first, second and third Ethernet interfaces. The PLC motion control panel is simple and reasonable in structure, supports onsite bus protocols of EthercCAT, PowerLink and RS485, is high in compatibility, has a function of redundancy, and improves the reliability and safety of the control panel.