425results about How to "Meet control requirements" patented technology

The invention discloses a combination control system for integration electric power steering and active steering. The combination control system for integration electric power steering and active steering comprises an active steering control system, an electric power steering control system, an adjustment control system based on yaw velocity and an adjustment control system based on steering wheel moment, the active steering control system and the electric power steering control system are respectively connected with a vehicle speed sensor and a steering wheel angle sensor for calculating and processing the inputted vehicle speed and steering wheel angle and outputting the total front wheel angle control signal to the total system for steering the front wheel actively; the adjustment control system based on yaw velocity is used for adjusting the obtained yaw velocity value for having feedback to the active steering control system for amending the front wheel angle control signal; the adjustment control system based on steering wheel moment is used for adjusting the obtained steering wheel moment for having feedback to the electric power steering control system for amending the outputted front wheel angle control signal.

The invention discloses a plant extract and synergist contained antimicrobial composition. The composition contains a plant extract (A), a synergist (B), a mildew preventive (C), an antiseptic (D) and a solvent (E). The composition disclosed by the invention has a good inhibiting effect on bacteria and fungi (molds nod saccharomycetes); through the synergistic effect of all the components, the consumption of the traditional chemical antiseptic IPBC (Iodopropynyl Butylcarbamate) or nipagin esters is remarkably reduced, the safety in using the composition is improved, the irritation is reduced, and the possible risks are reduced. Meanwhile, the antiseptic is compounded in the composition, so that the antibacterial spectrum of an antiseptic system of the composition is effectively expanded, and the bacteriostatic ability is enhanced.

The invention discloses a double-flexible-grinding-head magnetorheological polishing device. In the device, a vertical gantry of a bed body and an X-axis are both fixed on a horizontal base; a worktable is fixed on a sliding block of the X-axis; a Y-axis is fixed on a horizontal beam of the vertical gantry; and a first Z-axis and a second Z-axis are arrangedon the Y-axis in parallel. A large flexible grinding head is installed on the first Z-axis; and a small flexible grinding head is arranged on the second Z-axis. A high-flow circulation system connected with the large flexible grinding head and a low-flow circulation system connected with the small flexible grinding head are arranged on a trolley. A control cabinet is arranged at the rear part of the vertical gantry; and a circulation system cabinet and a cleaning system are arranged at the side surface of the vertical gantry. The double-flexible-grinding-head magnetorheological polishing device provided by the invention has the advantages of high accuracy, high rigidness, high stability and high dynamic property. The double-flexible-grinding-head magnetorheological polishing device not only can be used for processing of large-caliber phase elements, but also can be used for high-accuracy processing of large-caliber planar optical elements within the range of full caliber. The optimal matching of the processing efficiency and the processing accuracy can be realized.

The invention relates to a power coordinated control method for a multi-terminal flexible DC transmission system. According to the method, a converter station with larger rated capacity is selected from a VSC-MTDC (Voltage Source Converter Multi-Terminal DC) system to serve as a main converter station, constant DC voltage control is performed on the main converter station, the other converter stations are divided into two groups, adaptive droop control and constant active power control are respectively performed on the two groups of converter stations, the main converter station performs regulation independently when the unbalanced power in the system is within a regulating range of the main converter station, and when the main converter station is fully loaded or out of operation, the redundant unbalanced power is regulated by a converter station adopting the droop control, the active power outputted by the converter station is automatically regulated according to DC side voltage changes caused by the unbalanced power so as to enable the system power to achieve a balance again. The power coordinated control method can avoid a phenomenon of out-of-limit voltage, reduce voltage fluctuations at the DC side and make full use of the active power capacity of the converter station. The method can effectively improve the control quality of the multi-terminal flexible DC transmission system, and meet control requirements of the system under different operating conditions.

The invention relates to a greenhouse environment and irrigation control system with group control of multi-temperature regions, which mainly comprises a greenhouse control software system run in a centralized monitoring computer, a communication network system based on a CAN field bus and unit controllers distributed in various temperature regions. The unit controller comprises a microcontroller, a CAN field bus communication module, an input/output interface module for digital quantity and analog quantity, an input module for collecting sensing signals from environmental sensors and plant physiological sensor in a greenhouse and performing signal processing, and an output module for driving and controlling the operation of various equipments in the greenhouse. The greenhouse control software in the centralized monitoring computer is used for processing environmental and plant physiological information of the multi-temperature regions, performing control algorithm and strategy selection and algorithmic calculation, and real-time transmitting a control implantation action obtained based on calculation results to each unit controller to control the operation of greenhouse equipments. The greenhouse environment and irrigation control system with group control of the multi-temperature regions adopts a development method of configuration software, so that the overall system can perform software configuration setting on the unit controller, the sensors, the control equipments, the display interface and the greenhouse control strategy according to specific conditions of the greenhouse, so as to adapt to different requirements of different greenhouse agricultural production managements on the control system.

The invention relates to an active disturbance control method of a flexible direct current power transmission system. The method adopts the technical scheme that the method comprises the following steps that a rectifier controller is arranged at the head end of a direct current power transmission line of the flexible direct current power transmission system to carry out the constant direct current voltage control on a rectifier at the alternating current system side, an inverter controller is arranged at the tail end of the direct current power transmission line to carry out the constant alternating current voltage control on an inverter, and a double-closed loop type vector control strategy is adopted for the constant alternating current voltage control of the inverter, wherein an outer loop of the voltage is controlled by an active disturbance controller, an inner loop is controlled by current decoupling, and the direction of bus voltage at the inverter alternating current side is fixed to the direction of an axis d. The method has the advantages that the overshoot of the bus voltage at the passive network alternating current side is reduced when the flexible direct current power transmission system starts to respond, the precision and the stability of the alternating current voltage control are improved, the inside and outside total disturbance of the flexible direct current power transmission system can be evaluated in a real-time way, the feedforward compensation can be timely carried out, the disturbance control capability of the flexible direct current power transmission system is improved, and the control requirements of a non-linear system can be met.

The invention discloses a robot continuous point position motion planning method. The method comprises the steps of (1) determining the motion information of at least two data points; (2) adding at least two auxiliary points on a motion curve formed by two adjacent data points to divide the motion curve into at least three curve sections equally according to time; (3) determining boundary conditions according to the motion information of the two adjacent data points and the restriction conditions of the auxiliary points; (4) determining the parameters to be determined of all curve sections on the motion curve on the basis of a cubic spline function and boundary conditions so that the robot continuous point position motion planning can be achieved. According to the technical scheme, the cubic spline function is adopted to carry out the continuous point position motion planning, more boundary conditions can be assigned, and therefore the fact that the whole motion process is smooth, stable and free of shock is achieved; the problem of overshoot callback can be solved at the same time. The invention further provides a motion controller for achieving the robot continuous point position motion planning method.

The invention discloses a soft-packed lithium ion battery hot and cold pressing formation device. The device comprises a rack, a variable-condition charging and discharging power supply, hot pressing formation fixtures, cold pressing fixtures, feeding and discharging mechanisms and a battery grabber. The variable-condition charging and discharging power supply, the hot pressing formation fixtures, the cold pressing fixtures, the feeding and discharging mechanisms and the battery grabber are all arranged on the rack and all controlled by a control mechanism. The feeding and discharging mechanisms are arranged at the two ends of the rack. The cold pressing fixtures are arranged between the hot pressing formation fixtures. The variable-condition charging and discharging power supply is electrically connected with the hot pressing formation fixtures. The hot pressing formation fixtures and the cold pressing fixtures all comprise an aluminum layer pressing plate making contact with a battery. The battery grabber grabs the battery at a time so that the battery can be conveyed among the feeding and discharging mechanisms, the hot pressing formation fixtures and the cold pressing fixtures. The three procedures of formation, hot pressing and cold pressing of the battery are integrated in the same device, the procedures are simplified, product performance and appearance are improved.

The invention discloses an LED landscape city building facade cluster light Internet control system, which comprises a centralized control terminal, a server terminal and node terminals, wherein the centralized control terminal is configured to be in communication connection with the server terminal and the node terminals through a wired and / or wireless network, so as to control the node terminal to combine or integrally link a node LED lamp, the server terminal is configured to receive data information sent by the centralized control terminal and send the data information to the node terminals, and monitor the work states of the node terminals in real time and feed the work states of the node terminals back to the centralized control terminal, and the node terminals are configured to control the data uploading, downloading and lighting of verious node LED lamps according to the received data information. The Internet control system provided by the invention can meet the linkage control and remote control on multi-node building facade cluster light, and has high flexibility.

The invention discloses a parameter recognition method for a permanent magnet synchronous motor of an electric vehicle. The method comprises the steps of judging whether the permanent magnet synchronous motor of the electric vehicle needs parameter recognition or not; when parameter recognition needs to be carried out, injecting a low-frequency small-amplitude sinusoidal current signal into quadrature-axis expected current of the permanent magnet synchronous motor, and automatically adjusting the quadrature-axis expected current, direct-axis expected current, quadrature-axis voltage and direct-axis voltage by an adjuster; the rotating speed and position signals of the permanent magnet synchronous motor are measured through a rotating speed sensor, three-phase current of the permanent magnet synchronous motor is collected through a current sensor and converted into direct-axis feedback current and quadrature-axis feedback current, and data are transmitted to a parameter recognition linkin real time; and performing parameter recognition on the permanent magnet synchronous motor through the parameter recognition link until the parameters converge. According to the method, parameter recognition can be carried out under any operation state of the motor, the control requirements of the permanent magnet synchronous motors with different structures can be well met, the identified parameters are accurate, and the application range is wide.

The invention discloses an injection mold cavity pressure control system and method. The injection mold cavity pressure control system comprises a high-pressure nitrogen source, wherein the high-pressure nitrogen source is connected with a mould air inlet through a pipeline, a first pressure reducing valve is arranged on the part, which is close to the high-pressure nitrogen source, of the pipeline, the pipeline is divided into two paths after passing through the first pressure reducing valve, one path is connected with an air control regulating valve through a second pressure reducing valve, a first pressure meter and an electronic pressure controller, the other path is connected with the air control regulating valve through a second pressure meter, the outlet of the air control regulating valve is connected with the mould air inlet, a third pressure meter, a pressure sensor and a pressure relieving pipeline unit are sequentially arranged on the pipeline, the electronic pressure controller, the pressure relieving pipeline unit and the pressure sensor are connected with a data processing and controlling system, and the data processing and controlling system is connected with an injection molding machine signal unit. The invention also discloses a control method of the injection mold cavity pressure control system. The injection mold cavity pressure control system has the characteristics of high pressurizing rate and pressure relieving rate of a mould cavity, capabilities of maintaining high pressure of the mould cavity and controlling the acting time of the high pressure of the mould cavity, and the like.

A multifunctional nursing bed is composed of left and right boards for turning body over, left and right buttock boards, cover plate of bedpan, thigh board, shank board and supporting frame. Its control system consists of information input module, control module with single-chip microprocessor, and PLC control system.

The invention discloses a device and a method for controlling switched reluctance motors for electric vehicles on basis of a CPLD (a programmable logic device). A hysteresis controller and a drive are connected in series with the CPLD device and then are connected between a current sensor and a power inverter; the output of the CPLD device is connected f/v conversion, v/f conversion and different input ends of the CPLD device connected with an encoder; a rotation-speed setting circuit is connected in series with a rotation-speed regulator and then is connected between the v/f conversion and the f/v conversion; a complementation circuit is connected between the rotation-speed regulator and a control-mode switch; the control-mode switch is connected with the inputs of the hysteresis controller and the drive; and a motor is connected with the input of the encoder. The device and the method can control the low-speed electrokinetic state, power-generation state and high-speed electrokinetic state of the electric vehicles respectively, meets control requirements in high-temperature, high-humidity, vibration dustiness and other severe working environment, have the advantages of reconfiguration property, no operation time delay, better real-time control and anti-interference capability, can simplify structure, raise operating speed, and control flexibility and reliability.

The invention discloses an electrospark wire-electrode cutting pulsed power supply and a control method thereof. The electrospark wire-electrode cutting pulsed power supply comprises an alternating-current power supply, a PFC convertor, a DC/DC convertor, a main circuit, a detecting circuit, a driving circuit, a control circuit and an upper computer, wherein a three-way staggered in-parallel Buckcircuit is adopted as the main circuit, supplies unipolar voltage to a gap and replaces current-limiting resistance with energy-storage inductance. According to the control method of the electrosparkwire-electrode cutting pulsed power supply, feedback closed-loop control is conducted by taking the sum of gap voltage and gap currents as the unique control quantity of feedback closed-loop control.Therefore, the machining efficiency and the switching frequency of a system are improved, the dynamic response capability of the system is improved, the current-resistant requirement on a switching tube is lowered, and on the condition that the discharge frequency is kept constant, the single-time discharge energy can be maintained consistent, and high-speed uniform micromachining can be achieved.

The invention relates to an electronic control unit (ECU) of an electric-control high-pressure common-rail injection system for a vehicle diesel engine, mainly applied to a high-pressure common-rail system of a diesel engine for accurately controlling the injection volume, the injection pressure, the injection timing, the injection rule, and the like; an ECU input module comprises digital quantityinput and analog quantity input which comprise signal-processing circuits; a microcontroller module adopts an MPC5534 of an ALE technology as a microcontroller; an output module is used as a drivingcircuit of a high-pressure common-rail pressure control valve and an electromagnetic valve of an oil injector, adopts a 250V high-pressure driving technology to realize rapid starting performance, adopts TPU multipath combination to control injection, applies a CPLD technology to realize the double closed-ring control of currents and voltages and adopts inductors to store and recycle energy so asto reduce the consumption of driving energy; and a communication module mainly comprises a CAN circuit and a serial communications interface (SCI) circuit. The size of an ECU circuit board is reducedby applying a modularized heat-dissipation technology and an EMC circuit design technology is applied.

The invention discloses a 3104 aluminum alloy spectrum standard sample, which is characterized in that the aluminum comprises Si 0.04-0.70%, Fe 0.18-0.90%, Cu 0.02-0.34%, Mn 0.65-1.3%, Mg 0.65-1.58%, Zn 0.04- 0.34%, Ti 0.04-0.91%, Ni 0.05-0.11%, Cd 2-70ppm, Pb 8- 170ppm, Ga 0.008-0.11%, V 0.008-0.11% and Na 1-40ppm. The invention also discloses a preparation method thereof. The inventive aluminum alloy spectrum standard sample can be used for the control and the analysis of 3104 aluminum alloy.

The invention discloses a mine-used combined frequency converter, which consists of an explosion-resistant enclosure, frequency converters, a cooling device, built-in electric reactors and filters and so on, and has a combined structure, that is, a plurality of frequency converters are arranged in the explosion-resistant enclosure. A main controller for controlling the frequency converters, a refrigeration device, an isolating switch, and a pilot control circuit can be arranged in the explosion-resistant enclosure. The mine-used combined frequency converter is applicable to the frequency control and centralized control of multi-point driving and single-point driving of a plurality of equipment motors in explosive gas environments such as underground coal mines. The combined structure has centralized equipment and small occupation space, reduces installation and maintenance workload, and reduces the cost. The built-in main controller can intensively control the working state of the frequency converters and meet various control requirements; and the man-machine conversation is realized through a keyboard display, which has flexible control and convenient setting. A heat pipe radiator has high efficiency; and the built-in refrigeration device strengthens the temperature reduction and improves the service life of the frequency converters. An alternating current voltage-stabilizing pilot circuit has simple external connection. The mine-used combined frequency converter has the advantages of simple structure and easy production.

The invention discloses a sliding pressure curve correction method based on the load reception capacity. The method comprises the steps that a sliding pressure curve about unit loads and main steam pressure set values of a steam turbine is obtained; a main steam regulation door is moved to the reset optimal regulation door opening by adjusting the main steam pressure related to the unit loads, the deviation between the unit loads and an AGC instruction is made to meet the preset condition, and thus a correction curve about different unit loads and the corresponding main steam pressure correction values is obtained; and the correction curve is overlapped to the sliding pressure curve for correction of the main steam pressure set values. According to the sliding pressure curve correction method disclosed by the invention, pressure adjustment is performed according to the main steam pressure set values corrected by the correction values, and the current main steam pressure of the steam turbine can reach the set values of the ideal state; and meanwhile, the regulation door opening of the steam turbine is made to reach the optimal position, and thus influences of the environmental temperature, the steam turbine characteristics, the heat supply steam extraction capacity change and other environmental factors on the sliding pressure curve are eliminated.

The invention discloses a method for controlling mechanical residual vibration of a linear servo system, and belongs to the technical field of mechanical device control. Most of current control methods for restraining residual vibration of the servo system are restraining methods based on input shapers, the methods have the shortcomings that pulse amplitudes and time period parameters are difficultly controlled, running errors are large, and control requirements of the linear servo system cannot be met. The method includes the steps: firstly, connecting the linear servo system, and downloading parameters into a chip on a motion control card; secondly, enabling the servo system to close a motor after controller parameters are downloaded; thirdly, collecting sampling points; fourthly, iterating error signals used for optimizing; fifthly, issuing iterative learning correction driving force to the motion control card again, and repeatedly iterating iterative learning processes to restrain resonance. Input signals subtract output signals to serve as error signals. The method is simple, practical and high in accuracy.

The invention discloses a motor control system for an electric fork-lift truck, which comprises a lifting control subsystem and a drive control subsystem, wherein the lifting control subsystem is used for controlling output power of a lifting motor of the electric fork-lift truck in order to adjust a working mode of the electric fork-lift truck, and comprises a first collection module, a first detection module and a first control module; the drive control subsystem is used for controlling output power of the drive control subsystem of the electric fork-lift truck in order to adjust a speed of the electric fork-lift truck, and comprises a second collection module, a second detection module and a second control module. The motor control system can control the lifting motor and a drive motor of the electric fork-lift truck, and meet a control requirement of the electric fork-lift truck.

The invention provides a high-temperature corrosion and erosion testing device of a bent pipe column of an oil well pipe. The high-temperature corrosion and erosion testing device comprises an erosion and corrosion channel, an electrochemical work station and a storage tank, wherein the storage tank comprises a storage tank secondary cavity and a storage tank main cavity, which are arranged in sequence from bottom to top; the upper end of the storage tank secondary cavity is communicated with the upper part of the storage tank main cavity through a connection channel, and a secondary temperature controller is arranged at the bottom of the lower end of the storage tank secondary cavity; the erosion and corrosion channel comprises an erosion and corrosion box body, and the two ends of the erosion and corrosion box body are communicated with the storage tank main cavity through a main pipeline and a main loop respectively; the erosion and corrosion box body is provided with a plurality of sample mounting holes; the main pipeline is communicated with the storage tank main cavity through a gas pipeline and a liquid pipeline, which are arranged in parallel; a gas flow controller and a gas control valve are arranged on the gas pipeline connected onto the upper part of the storage tank main cavity respectively; a liquid flow controller and a liquid control valve are arranged on the liquid pipeline connected onto the lower part of the storage tank main cavity respectively; the upper end of the gas flow controller is connected with the upper end of the liquid flow controller through a communication pipeline and the communication pipeline is provided with a regulating and controlling valve; and the electrochemical work station is connected with a sample.