31results about How to "Realize closed-loop feedback" patented technology

The invention discloses a BIM-based track engineering construction progress information management method. The method comprises the following steps: S1, establishing a three-dimensional simulation model of a to-be-constructed track construction based on BIM (Building Information Modeling); S2, establishing primitive information links for a construction progress plan and the three-dimensional simulation model in the S1, integrating time dimensions and forming a 4D progress visualization model; S3, applying the 4D progress visualization model to dynamic monitoring of the to-be-constructed trackconstruction, and comparing the actual construction progress and quality with the 4D progress visualization model to confirm consistency; if the actual construction progress and quality with the 4D progress visualization model are not consistent, carrying out S4: analyzing reasons of construction progress delays or poor quality; if the actual construction progress and quality with the 4D progressvisualization model are consistent, continuing S5: performing dynamic monitoring on each stage of the to-be-constructed track construction until the construction is completed. The method has the following advantages: the construction progress, related resources, the construction quality, site arrangement or the like can be comprehensively taken into consideration, plans can be formulated reasonably, resource utilization can be optimized, better dynamic monitoring and management of the whole construction progress can be realized, closed-loop feedback can be realized, and the efficiency can be improved.

The invention discloses an air-to-ground guided missile projection glide-section guidance method including speed process constraint and multi-terminal constraint. The method comprises the steps of dividing the resistance consumed energy into a part for overcoming the gravity and a turning maneuver part according to the characteristic that the lift-drag ratio of an aircraft is not great when a projection section nearly stays at an equilibrium gliding state, and respectively acquiring an expression; solving by utilizing the energy conservation law, and obtaining a corresponding relation of a terminal speed and longitudinal distance, so that the terminal speed constraint problem can be solved by utilizing the general guidance law; finally designing a speed control feedback by utilizing a normal control boundary and an axial control boundary, so that a guidance law which can simultaneously meet the requirements of terminal height, terminal angle, terminal speed and maximal speed constraint can be obtained. The air-to-ground guided missile projection glide-section guidance method has the advantages that the multi-constraint guidance problem of the projection glide section can be solved by adopting a closed-loop analysis guidance method, so that not only can good task adaptability be realized, but also convenience in engineering realization can be realized.

The invention proposes a spherical phased array single pulse digital tracking system and aims to provide a sum-difference beam tracking system without tracking phasing and with the capability of improving the over-top tracking performance. The system is implemented according to the following technical scheme: vector tracking angle error extraction equipment is used for extracting azimuth difference voltage and pitching difference voltage according to the sum, azimuth difference and pitching difference beam digital signals, a direction vector in the current three-dimensional cartesian coordinate system is converted into an error voltage of each component of the vector, which is sent into an angle tracking loop for vector tracking; the vector angle tracking equipment is used for expressing the current target azimuth and the pitching as the direction vector in the three-dimensional cartesian coordinate system, the error voltage of each component of the direction vector extracted in the three-dimensional cartesian coordinate system is sent into the angle tracking loop for vector tracking, the direction vector output by the tracking loop is converted into azimuth and pitching values obtained by tracking, which are fed back to all-digital single-pulse sum-difference beam forming equipment to achieve closed-loop feedback of target direction vector tracking.

A plastic pipe inkjet printer belongs to the field of light industry printing. The plastic pipe inkjet printer is composed of a bottom plate, a controller, a motor bracket, a stepper motor, an ink barrel, a micro pump, an ink conveying pipe, vertical plates, a shaft, a bearing, a turntable, a CCD, a cartridge circuit board, a cartridge, adjusting plates, adjusting screws, a cartridge bracket, and a small gear. The plastic pipe inkjet printer is characterized in that the bottom plate is disposed at the bottom of the whole equipment; the vertical plates, the motor bracket, the controller and the ink barrel are mounted on the bottom plate; the stepper motor is mounted on the motor bracket; the small gear is mounted on the steppe motor and is in meshed transmission with the toothed arc of the turntable; the shaft is mounted on a bracket formed by the two vertical plates and is equipped with the bearing, and the outer surface of the bearing contacts the toothed arc of the turntable; the cartridge, the cartridge circuit board, the adjusting plates and the CCD are mounted on the cartridge bracket; the adjusting plates are mounted on the turntable through the adjusting screws; the micro pump is mounted on the ink barrel; and the ink conveying pipe is mounted between the micro pump and the cartridge. By adopting the inkjet printer, the inkjet printing position of a plastic pipe can be automatically tracked and adjusted.

The invention discloses an oxygen concentration monitoring and controlling method of a breathing machine. The method comprises the following steps of S00, the breathing machine enters a normal ventilation mode; S10, a control unit reads the current oxygen concentration set value of the breathing machine; S20, according to the current oxygen concentration set value, the control unit separately controls the parameters of an air control valve and an oxygen control valve inside the breathing machine to ventilate a patient; S30, the control unit controls a paramagnetic oxygen sensor to read the current oxygen concentration monitored value of the breathing machine in real time; S40, according to the current oxygen concentration monitored value, the control units adjust the parameters of the air control valve and the oxygen control valve in real time to keep the current oxygen concentration monitored value identical to the current oxygen concentration set value. The oxygen concentration monitoring and controlling method of the breathing machine can improve the oxygen concentration monitoring precision of the breathing machine and shorten the oxygen concentration monitoring time. Besides, the paramagnetic oxygen sensor works under purely physical measurement principles and has no consumption and a long service life.

The invention provides a self-feedback LED control method and a system. According to the method, m frequencies are set as a control period in the on-off control of the frequency f, and control parameters Pm, n of n LEDs in the specified brightness control mode are realized in each control period; the control relationship between the control parameters Pm, n, the frequency f and the theoretical input current of the LED is quantized, and an algorithm model is established; the relationship between the input current C and the output brightness iL is linearized and the algorithm model is established; and the combination of self-feedback and quantization and linearization is performed. The LED control method is particularly suitable for high-frequency quantitative on-off control of single or multiple LED modules at the frequency of 1KHZ-20KHZ, and the actual brightness can be kept constant and the brightness varies linearly when the input current is adjusted. Besides, the brightness can be adjusted in case of brightness decay in the long-term use so that the brightness is constant in the control range and the control accuracy of the device can be enhanced.

The invention discloses a stable and uniform-speed lifting structure for photocuring forming 3D printing. The stable and uniform-speed lifting structure for the photocuring forming 3D printing comprises a base, wherein portal upright posts and fixed legs are fixedly and correspondingly connected to the top of the base, and a servo motor is fixedly connected with the top end of each portal uprightpost. A rotating rod is fixedly connected with the output end of the servo motor, and a shaft rod is fixedly connected with the surface of the rotating rod through a connecting rod. A contact block isfixedly connected with one end of the rotating rod, and a rotating shaft is rotatably connected between the opposite sides of the two fixed legs. The invention relates to the technical field of 3d printing. The stable and uniform-speed lifting structure for the photocuring forming 3D printing solves the problem that existing lifting structure for the 3D printing is not stable in the lifting process, the lifting can be carried out through adjustment, so that the lifting process is more stable, the processing quality of products is ensured, the processing cost is greatly reduced, the economic benefit is increased, and is favorable for users to use.

The invention discloses a feedback device for detecting a descending position of a workpiecepretargeting tray. The feedback device comprises a main body, an action rod, a straight pin, a spring plunger and a gas sensitive element. Interior air passage is communicated and closed through reciprocation from top to bottom of the action rod, an oil cylinder is clamped and then a workpiece is clamped after the result detected by the gas sensitive element is fed back to a numerical control system. According to the feedback device, closed loop feedback of the pretargeting tray is achieved, accident damage of clamps is avoided, and potential safety hazard is eliminated.

The invention discloses a multi-axis motion and series manipulator composite drive four-reflector polishing machine tool which comprises an X-direction linear module, a Y-direction linear module, a Z-direction linear module, a B-direction rotating platform assembly, a C-direction rotating platform assembly, a machine tool body assembly, an air cylinder counterweight device and a movable working platform. The X-direction linear module is fixed to a bottom plate of the machine tool body assembly, and the Z-direction linear module is fixed to the X-direction linear module. The C-direction rotating platform assembly is fixed on the Z-direction linear module, the Y-direction linear module is fixed to a stand column of the machine tool body assembly, the movable working platform is fixed to the Y-direction linear module, and the B-direction rotating platform assembly is fixed to the movable working platform. A workpiece clamp device is fixed on the B-direction rotating platform assembly, one end of a series mechanical arm tool is fixed to the C-direction rotating platform assembly, and the other end of the series mechanical arm tool is provided with a polishing tool head which is matched with the workpiece clamp device to polish the optical curved surface of a workpiece.

The invention discloses a flood diagnosis and scheduling method for an urban power transmission line. The method comprises the following steps: acquiring remote sensing image data around a power transmission line through a data acquisition module, transmitting the remote sensing image data to a data analysis and early warning module, judging whether a flood disaster occurs or not, determining a disaster situation in combination with power monitoring data and traffic monitoring data, and transmitting a result to a scheduling module after diagnosis is completed; and the scheduling module directly adjusts a flow switch valve of the underground pipe network according to an analysis result to reinforce or weaken flow control. Power data, traffic data and climate disaster data resources are integrated, resource optimization configuration is achieved, investment of infrastructure construction is reduced, flood disaster diagnosis is more accurate and reliable by obtaining multi-source data information, the safety coefficient of a power transmission line in flood disasters is increased, and life and property safety of urban residents is guaranteed.

The invention discloses a method for realizing hybrid dimension joint simulation by utilizing dynamic parameter mixing, and the method comprises the following operations: 1) after selecting a boundary condition, constructing a simulation model and performing field steady state simulation; 2) performing order reduction processing and data reconstruction on the steady-state field simulation result to construct and form an agent model; 3) importing the proxy model into the simulation model, and performing applicability check according to the model requirements; 4) importing the proxy model meeting the requirements into a system simulation tool, adding the system simulation tool into a multidisciplinary joint simulation platform of a distributed architecture, and realizing mixed-dimension joint simulation based on a data interaction tool. The main difference between the method and the static parameter mixing is that the static parameter mixing is parameter identification and loose coupling of the steady-state field simulation model, and the dynamic parameter mixing is proxy model reconstruction and loose coupling of the steady-state field simulation model.

The invention discloses a switching power supply circuit and a switching power supply. The circuit comprises a primary circuit and a secondary circuit. The primary circuit comprises an electromagneticfiltering and rectifying circuit, an interleaved power factor correction circuit, a resonant conversion circuit and a protection circuit, wherein the electromagnetic filtering and rectifying circuitfilters and rectifies the alternating current input to generate a pulsating direct current signal, the interleaved power factor correction circuit converts the pulsating direct current signal into a direct current level and performs power factor correction at the same time, the resonant conversion circuit carries out high-frequency switching on the direct-current level so as to convert the direct-current level into a high-frequency square wave signal, and the protection circuit is responsible for detecting and protecting the primary circuit. The secondary circuit comprises a photoelectric isolation feedback circuit and a synchronous rectification and filtering circuit. The high-frequency square wave signal is coupled by the high-frequency isolation transformer, rectified and filtered in the secondary synchronous rectification and filtering circuit, and finally output in a direct-current manner. The photoelectric isolation feedback circuit is used for sampling direct current output andfeeding back to the resonant conversion circuit. According to the invention, closed-loop control and overload protection are achieved, the circuit is protected on the one hand, and the direct currentoutput can be stabilized on the other hand so as to avoid damage to a carrier.

The invention provides a series-parameter-adjustable converter and power supply assembly used for the converter. The converter comprises an input control stage, an isolation control stage, an inversion control stage and an output feedback stage. The input control stage comprises a plurality of high-voltage rectifying circuits which are connected in parallel; the isolation control stage comprises a DC-DC conversion circuit and an isolation protection circuit connected with the DC-DC conversion circuit. the inversion control stage comprises a plurality of inversion controllers; an input control parameter is determined based on an AC network parameter input by the input control stage; an isolation control parameter is adjusted based on an output signal of the input control stage; and the inversion control parameter isadjusted based on an feedback signal and the isolation control parameter. The invention also provides a power supply assembly for the converter. The power supply assembly comprises a reference source, a protection unit and a feedback unit. The feedback unit constitutes the output feedback stage of the converter. The reference source forms the reference source circuit of the converter. According to the series-parameter-adjustable converter and the power supply assembly used for the converter of the invention, multi-stage parameter controllable adjustment of the converter is realized.

The invention discloses a Stackeberg game-based network resource allocation method. The method comprises the following steps of: acquiring parameters of a domain cognitive server; gathering and processing information of the domain cognitive server; reporting a current state and a quality of service (QoS) parameter of a network to a center server; gathering the information of the whole network by using the center server; transmitting strategy information to each domain server by using the center server; generating strategy space by using the domain cognitive server; and performing closed-loop information feedback. The method mainly researches how to introduce a master-slave incentive thought in a game theory into a cognitive network, introduces a network induction strategy by self-sensing dynamic information of the network, and discloses a dynamic adjusting algorithm of the network from a common state to an optimal operation state by adopting a dynamic game method so as to realize self-control of the cognitive network. The method relates to the technical fields such as service identification, the QoS of the network, the game theory, the cognitive network and the like.

The invention provides a tunneling type acceleration sensor. According to the tunneling type acceleration sensor, a graphene movable mechanical part is adopted, compared with an existing gold materialor silicon-based material, the electromigration phenomenon in the tunneling type acceleration sensor can be better reduced, due to the fact that the graphene material is small, the size of the acceleration sensor can be further reduced, and the application range of the acceleration sensor is enlarged. Meanwhile, the sensor comprehensively adopts a single-side S-shaped double-cantilever structure,and has the advantages of high sensitivity and high anti-seismic property.

The invention relates to an electric fine adjustment system for a screen frame of a printing machine and the printing machine. The electric fine adjustment system for the screen frame of the printingmachine comprises a printing head beam base, a printing head beam, at least two fine adjustment devices and a control device, wherein one end of the printing head beam is fixed on the printing head beam base; the two fine adjustment devices are symmetrically arranged at two ends of the printing head beam; each fine adjustment device comprises a screen frame cross beam, a fine adjustment frame, anX-axis moving group, a Y-axis moving group and a Z-axis moving group; and the screen frame is limited and fixed between the screen frame cross beams of the two fine adjustment devices. Through the arrangement of the X-axis moving group, the Y-axis moving group and the Z-axis moving group in each fine adjustment device, the screen frame can be adjusted in three directions, and the position of the screen frame can be accurately adjusted, so that printed pattern positions of different printed matters can be accurately aligned, and the influence on the printing effect due to the fact that the position of the screen frame is not easy to adjust in repeated squeegee printing is avoided.

The invention relates to a closed-loop control method,in particular to a closed-loop control method for a servo driver and a closed-loop control device for the servo driver. The closed-loop control method includes the following steps of obtaining,wherein the servo driver obtains execution instruction data sent by a main controller through the MECHATROLINK-III communication protocol; executing,wherein the servo driver drives a servo motor to execute corresponding movement according to the execution instruction data; feedback,wherein the servo driver feeds back conditions of the corresponding movement executed by the servo motor to a main controller through the MECHATROLINK-III communication protocol. According to the closed-loop control method,bi-direction data transmission can be achievedbetween the main controller and the servo driver,and the control accuracy and the control effect are improved.

The invention discloses a forward serial connection control system and method of a double DC motor. Six IGBT modules are connected in series pairwise to form three bridge arms, the three bridge arms are connected in parallel between anode and cathode of a DC power supply, the double DC motor for forward serial connection is connected with the three bridge arms in series, and passes a speed sensor,a current sensor and a speed regulation module successively and then connected with a reference voltage combiner via a two-stage PI controller, the reference voltage combiner is connected with a three-phase inverter via a PWM pulse generation unit, the three-phase inverter is connected with the reference voltage combiner via a current regulation module and one-stage PI controller, the PWM pulse generation unit is connected via the reference voltage combiner, and pulse control signals generated by the PWM pulse generation unit are used to control ON / OFF of the six IGBT modules and further drive operation of the double-DC motor. The system and method can be realized by modifying a serial connection method of an existing or future double-DC motor, the method is suitable for different serialdriving systems of the double-DC motor, realization is simple, and the application range is wide.

The invention relates to the technical field of thin-wall part machining, in particular to a thin-wall part machining method and device based on workbench information monitoring, and the machining device comprises a workpiece and further comprises a workbench used for containing the workpiece, and integrated sensors used for collecting workpiece cutting force, cutting heat and cutting vibration signals in the machining process are densely distributed on the workbench surface; the cutter is used for machining the workpiece; and the upper computer is in control connection with the integrated sensor and the cutter, and is used for receiving the information collected by the integrated sensor, processing the information in real time, performing automatic optimization calculation on the machining parameters, synchronously adjusting the machining parameters of the machining cutter and updating the machining track, and realizing closed-loop feedback adjustment. Closed-loop feedback is achieved, and damage to the thin-wall part in the machining process is reduced.

The invention discloses a feedback device for detecting a descending position of a workpiecepretargeting tray. The feedback device comprises a main body, an action rod, a straight pin, a spring plunger and a gas sensitive element. Interior air passage is communicated and closed through reciprocation from top to bottom of the action rod, an oil cylinder is clamped and then a workpiece is clamped after the result detected by the gas sensitive element is fed back to a numerical control system. According to the feedback device, closed loop feedback of the pretargeting tray is achieved, accident damage of clamps is avoided, and potential safety hazard is eliminated.

A method for splicing the field of view of an area array device with a large field of view in the present invention, the steps are as follows: 1) N groups of lenses are set; the number of lenses is N≥2; the number of area array devices contained in the focal plane assembly corresponding to each lens is respectively m N a; M N The value of is greater than or equal to 1; 2) The inner field of view is spliced ​​for the focal plane components corresponding to the N lenses; 3) The lens is connected to the corresponding focal plane component to adjust the direction of the optical axis; 4) The focal plane between the lenses Surface components are used for external field of view stitching. 5) Repeat step 4) to complete the splicing of the outer field of view of the remaining focal plane components until the splicing of the field of view of all area array devices is completed. The splicing method of the invention has strong operability and strong practical value.

The invention proposes a serial parameter-adjustable converter and its power supply assembly. The converter includes an input control stage, an isolation control stage, an inverter control stage, and an output feedback stage; the input control stage includes a plurality of parallel high-voltage rectification circuits; the isolation control stage includes a DC-DC conversion circuit and a DC-DC conversion circuit connected Isolation protection circuit; the inverter control stage includes multiple inverter controllers; the input control parameters are determined based on the AC network parameters input by the input control stage; the isolation control parameters are adjusted based on the output signal of the input control stage; based on the feedback signal and the isolation control parameter to adjust the inverter control parameters. The invention also proposes a power supply assembly for said converter. The power supply assembly includes a reference source, a protection unit and a feedback unit; the feedback unit constitutes the output feedback stage of the converter. The reference source constitutes the reference source circuit of the converter. The invention realizes the controllable adjustment of multi-stage parameters of the converter.

The invention relates to a method for improving the safety performance of an electric blanket. The following steps are used: (1) a DC isolated power supply is used outside the blanket body so that theoutput voltage is lower than 36V without radiation; (2) a controller connected with the blanket body feeds back the temperature of the blanket body collected by multiple high-precision temperature sensors arranged in the blanket body to the MCU operation control unit of the controller for data analysis, temperature control of the heating wire is realized by using on / off of the MOS switch of a duty cycle control circuit module and the adjusting state is displayed through a controller liquid crystal screen; and (3) the Vref chip of the control circuit module of the MCU operation control unit realizes that the voltage rises from U1 to the safety voltage range of U2 within an instant. The DC isolated power supply is used so as to fundamentally solve the hidden danger of electric shock of thehuman body without radiation; the precision of temperature sampling can reach + / -0. 5 DEG C by temperature sampling sensors; and operation and control are simple and intelligentization can be realized.

The invention provides a computer room routing inspection method and device, and relates to the field of communication, closed-loop feedback of the whole process of routing inspection can be realized,so that a lot of manpower can be saved, and the situation of omission or untimely routing inspection is avoided. The method comprises the steps of: a routing inspection server obtains a routing inspection record and data collection information of a previous routing inspection period, wherein the routing inspection record comprises computer room fault information and computer room danger information recorded by a routing inspection terminal, and the data collection information comprises computer room fault information and computer room danger information obtained in other manners excluding therecording of the routing inspection terminal; the routing inspection server generates at least one first routing inspection plan according to the routing inspection record, the data collection information and routing inspection personnel information of the previous routing inspection period; and the routing inspection server sends each first routing inspection plan to the corresponding routing inspection terminal, so that the routing inspection personnel performs routing inspection on computer rooms according to the first routing inspection plan in the routing inspection terminal to obtain the routing inspection record within the present routing inspection period. The computer room routing inspection method and device are applied to the routing inspection of the computer rooms.

The invention discloses an air-to-ground guided missile projection glide-section guidance method including speed process constraint and multi-terminal constraint. The method comprises the steps of dividing the resistance consumed energy into a part for overcoming the gravity and a turning maneuver part according to the characteristic that the lift-drag ratio of an aircraft is not great when a projection section nearly stays at an equilibrium gliding state, and respectively acquiring an expression; solving by utilizing the energy conservation law, and obtaining a corresponding relation of a terminal speed and longitudinal distance, so that the terminal speed constraint problem can be solved by utilizing the general guidance law; finally designing a speed control feedback by utilizing a normal control boundary and an axial control boundary, so that a guidance law which can simultaneously meet the requirements of terminal height, terminal angle, terminal speed and maximal speed constraint can be obtained. The air-to-ground guided missile projection glide-section guidance method has the advantages that the multi-constraint guidance problem of the projection glide section can be solved by adopting a closed-loop analysis guidance method, so that not only can good task adaptability be realized, but also convenience in engineering realization can be realized.

The invention provides an optimization method and device for ocean target collaborative detection equipment, and the method comprises the steps: determining a management decision period, and obtaining at least one dynamic event modeling model, wherein the dynamic event modeling model comprises dynamic events of new target appearance or departure, equipment relay and supplement, overlarge common detection degree, data abnormity or user instruction issuing; in the time window, if a dynamic event occurs, generating a first adjustment instruction instantly, and if any dynamic event does not occur, generating a second adjustment instruction for the current time window; in response to the adjustment instruction, calculating a deviation between actual detection efficiency and a reference value according to a target function-based target and detection equipment cooperative scheduling detection efficiency evaluation model; and according to the deviation, generating an equipment scheduling optimization scheme, so that the detection equipment is adjusted to the equipment scheduling optimization scheme in real time or in the next time window to carry out target cooperative detection. According to the scheme, the cooperative detection efficiency can be improved, and the scheduling response capability can be improved.