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.

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 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 relates to a high-speed railway ballastless track structure performance prediction method and control system, and the system comprises a data collection module which is used for obtaining the data of the geometric dimension information, the distribution information and the disease type of a monitored object; the disease extension evolution model is used for predicting evolution information of the detected disease in the time dimension along with the external environment factors and the train load effect; according to the ballastless track structure performance prediction model, the change condition of each performance index of the track structure is completed through the input information of the disease evolution model, and the evolution rule of the comprehensive performance index of the ballastless track structure is obtained; the maintenance model is decided, the ballastless track structure maintenance opportunity and the range distribution of the disease maintenance combination are obtained through the established optimization objective function and an optimization algorithm, a decision maker selects a target solution to carry out corresponding maintenance operation and feeds back to the information module, disease and structure performance prediction is formed, and closed-loop operation is controlled.

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 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 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 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 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 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 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.