553results about How to "Accurate adjustment effect" patented technology

The invention relates to a quadrotor unmanned plane control method based on a fuzzy expansion state observer and an adaptive sliding formwork. The method comprises steps that a quadrotor unmanned plane system model is established, and a system state and controller parameters are initiated; a tracking differentiator is designed; a non-linear expansion state observer is designed; fuzzy rules are established; a parameter adaptive law is designed; an adaptive sliding formwork controller is designed. According to the method, the expansion state observer is designed to estimate indetermination of a system model and external disturbance; a pole assignment method is utilized to determine an initial value of an expansion state observer parameter; the fuzzy rules are introduced to realize online setting for the expansion state observer parameter; the parameter adaptive law is designed to acquire ideal controller gain; the adaptive sliding formwork controller is designed, rapid stabilization of a system tracking error and convergence to a zero point are guaranteed, and rapid and stable position tracking and pose adjustment of the quadrotor unmanned plane are realized. The method is advantaged in that system performance is improved, and rapid and stable system position tracking and pose adjustment are realized.

Disclosed are a device and a method for producing three-dimensional objects (3) by locally solidifying layers of a structural material at the points corresponding to the respective cross-section of the object (3) under the effect of electromagnetic or corpuscular radiation. The inventive device comprises a temperature measuring apparatus (13) for the contactless measurement of the temperature of the structural material in a measuring area (14) that is a subarea of the layer of the structural material as well as a position adjusting mechanism (15) for modifying the position of the measuring area (14) of the temperature measuring apparatus (13) regardless of the change in position of the zone upon which the radiant energy acts. Said device allows a non-illuminated area of the surface to be actively triggered for measuring the temperature of each layer while making it possible to detect a temperature distribution by modifying the position of the measuring area (14) in a layer.

The invention discloses a path estimating method which comprises the steps of: calculating a path quality estimating parameter according to a round-trip-delay, a packet loss probability and a congestion window of a path; dividing the path into an available path and an unavailable path according to the path quality estimating parameter; transmitting data on the available path and calculating the round-trip-delay, the packet loss probability and the congestion window of the path in a process of transmitting the data; and sending a heartbeat message in the unavailable path for calculating the round-trip-delay, the packet loss probability and the congestion window of the path. According to the invention, the path quality can be detected in real time, the path quality can be accurately calculated according to the simple parameter and the data transmission path is regulated and selected in real time, therefore the quality of the data transmission path is ensured, and the data is reliably transmitted. The path quality can be effectively estimated, and the transmission quality of streaming media data is improved.

An adjusting apparatus for a satellite antenna of accurate and superfine adjustment and simple structure, includes a dish support, a supporting base, a connecting base, an X-direction fine adjusting mechanism and a Y-direction fine adjusting mechanism. The dish support couples to a dish of the satellite antenna. The supporting base couples to the antenna support. The connecting base connects between the dish support and the supporting base. The X-direction fine adjusting mechanism couples between the supporting base and the connecting base. The Y-direction fine adjusting mechanism couples between the connecting base and the dish support. The X-direction and Y-direction fine adjusting mechanisms respectively by means of the meshing relation between the gear and the row teeth to fine adjust, inducing the satellite antenna, relative to the antenna support, generate tiny range of motions along X and Y directions, respectively.

The invention relates to an assembly welding tool device and method commonly used for large curved surface end sockets of pressure containers. The assembly welding tool device comprises a supporting base plate, a ball screw, grouped rolling bearings, a movement air cylinder, external locating blocks, internal locating blocks, a manual rocker and a graduated scale, wherein the ball screw and an executive component drive most of the external locating blocks and most of the internal locating blocks to move along guide rails of the supporting base plate so as to carry out integrated locating clamping fixation on the curved surface end sockets. According to the assembly welding tool device and method commonly used for the large curved surface end sockets of the pressure containers, in the manufacturing process of the pressure containers, tool locating of the large end sockets can be achieved, welding deformation is prevented, the curved surface end sockets are placed on the assembly welding tool device to be clamped in an assembly locating mode, spot fixation is carried out on weld joints, and then welding operation is carried out on the internal weld joints and the external weld joints; after welding is accomplished, the curved surface end sockets are naturally cooled to have the normal temperature, postwelding is carried out on the curved surface end sockets, stress relieving is carried out on the curved surface end sockets, labor intensity of workers is reduced, the production and manufacturing cycle of products is shortened, and the production cost is reduced.

The invention provides a near-to-eye display device capable of automatically adjusting an optical system and a method. The device comprises the optical system, a shooting unit, a processing unit and a motion unit, wherein the shooting unit and the motion unit are respectively electrically connected with the processing unit, the optical system comprises a lens unit and a display unit, the shooting unit comprises a shooting device having fixed focal length and fixed orientation, and the shooting device comprises a left shooting device and a right shooting device. Compared with the prior art, the device employs methods of independent measurement and single-side pupil coordinate position adjustment, so not only can an interpupillary distance of a user be measured, but also displacement of single-side pupils deviating from a center position can be further measured, corresponding side optical systems can be independently adjusted according to measurement results, measurement and adjustment are made to be more accurate, the better display effect is guaranteed, and possible adjustment deviation generated because of simple measurement on the interpupillary distance can be avoided.

The invention provides a mask device as well as a system and a method for manufacturing the mask device. The mask device comprises a mask tray and a plurality of mask plates on one side of the mask tray, wherein the mask tray comprises a plurality of support ribs; a plurality of grid openings which are arrayed in matrix are formed among the plurality of support ribs; each mask plate comprises a mask hole array and a plurality of fixed parts outward extending from the mask hole array; the fixed parts are used for connecting the support ribs of the mask tray; the mask hole array of one mask plate corresponds to one grid opening on the mask tray. By adopting the invention, the mask plates and the mask tray are simultaneously improved, and the traditional mask tray is designed into grid shape with support ribs in the middle instead of big openings; the plurality of mask plates respectively correspond to each grid and are respectively unfolded so that micro-distortion caused by large tension can be avoided and the mask plates can be more accurately unfolded to correct positions.

The invention relates to the field of communication, and discloses a control method of a dual-standby terminal and AFC (automatic frequency control) loops of the dual-standby terminal. In the invention, two AFC loops share a crystal oscillator, frequency deviation estimation obtained by two AFC loops respectively is processed through a selection control module, a final AFC control word for controlling the shared crystal oscillator is obtained, and the dual-standby terminal for controlling two AFC loops by a single crystal oscillator is realized. Because in the practical use, a corresponding link circuit by two numbers used by the dual-standby terminal, an endured temperature, a channel environment and the movement speed of the terminal are nearly identical, Through sharing one crystal oscillator, not only can be the implementation cost of the dual-standby terminal reduced effectively, but also the automatic frequency correction performance of the AFC loop is hardly not influenced.

The invention discloses an alternating current / direct current transient steady state integrated detection device. The alternating current / direct current transient steady state integrated detection device includes an alternating current / direct current transient steady state integrated test power source and an electronic type current transformer field test detection system; the alternating current / direct current transient steady state integrated test power source includes a direct-current impact power source, a direct-current transient steady state power source, an alternating current power frequency transient steady state power source and a combined loop control system; and the electronic type current transformer field test detection system includes a standard transformer, a standard conversion device and a transformer composite error tester. With the detection device adopted, transient steady state integrated tests of a direct current transformer and an alternating current transformer can be realized separately. With a method according to which a combined test loop composed of the direct-current impact power source, the transient steady state test power source and the alternating current transient steady state test power source is adopted, the capacity of an energy-storage capacitor in a direct-current impact / transient steady state test can be obviously decreased, and important parameters such as a transient current peak value, a decay time constant and step current response can be adjusted and configured more flexibly and accurately.

The invention provides a quadrotor aircraft control method based on pole assignment and a fuzzy active-disturbance-rejection control technology. The method comprises the steps of: establishing a quadrotor aircraft system model, and initializing the system state and controller parameters; designing a high-order tracking differentiator; designing a non-linear expansion state observer; establishing a fuzzy rule; and adding non-linear feedbacks. The expansion state observer is designed for estimating uncertainty and external disturbance of the system model. The pole assignment method is utilized to determine initial values of parameters of the expansion state observer. The fuzzy rule is introduced to carry out online setting on the parameters of the expansion state observer. A non-linear feedback control rule is designed to ensure that the tracking error of the system rapidly and stably converges to zero, and rapid and stable position tracking and posture adjustment of the quadrotor aircraft are realized. The problems of uncertainty and external disturbance of the system model are solved, the influences of the system model uncertainty and external disturbance are compensated, the performance of the system is improved, and the rapid and stable position tracking and posture adjustment of the system are realized.

The invention discloses a detection, estimation and adjustment method of a rigid spacecraft counteractive flywheel fault. First an attitude dynamics model and a motion model of a rigid spacecraft are built; a mathematical model is built under the circumstance that an efficiency damage fault occurs in a rigid spacecraft counteractive flywheels; then a nonlinear fault detection observer and a self-adaptive nonlinear fault estimation observer are designed to be used for rapid detection and precise estimation of an unknown fault respectively; and finally, obtained fault estimation information is utilized to design a self-adaptive sliding-mode fault-tolerant controller. The detection, estimation and adjustment method of the rigid spacecraft counteractive flywheel fault considers transient performance of the fault-tolerant controller, and can accurately and rapidly detect, estimate and adjust the unknown fault under the circumstance that the counteractive flywheel efficiency damage fault occurs in the rigid spacecraft. Influence on a system caused by external disturbance is considered at the same time, and the system can perform design of a fault diagnosis module and the fault-tolerant controller relatively independently, thereby simplifying the design process, and facilitating realization in engineering.

The invention provides a control method and system of a server heat dissipating controller. The heat dissipating controller comprises a control chip, a temperature sensor and a fan controller; the temperature sensor is connected with the input end of the control chip, and the fan controller and the control chip build communication connection through an independent link; and the control chip is connected with a BMC through an I2C. The method includes the steps that heat dissipation strategy data of updating of the BMC are acquired; server temperature measuring point temperature acquired by thetemperature sensor is acquired; according to the temperature and heat dissipating strategy data, a target rotating speed of fans is generated; and a current rotating speed of a fan corresponding to the temperature sensor is acquired, a rotating speed adjusting and control signal is generated according to the current rotating speed and the target rotating speed, and the rotating speed of the fans is adjusted and controlled. According to the control method and system of the server heat dissipating controller, heat dissipating control of a server is stripped away from the BMC, resources of the heat dissipating controller are sufficiently and effectively utilized, it is achieved the heat dissipating controller independently performs independent control over the various fans, and heat dissipating is accurately controlled.

The invention discloses a biosecurity detecting, controlling and warning device and method, which comprises a shell forming air passage, at least a filter, an air inlet and an air outlet. The invention also comprises: at least a wind speed sensor, at least a pressure difference sensor, at least a wind speed transducer, at least a pressure difference transducer, a data processor, a monitor, a warner and a blower. The filter is a high-efficiency filter, the wind speed sensor is a hot-bulb wind speed sensor, the pressure difference sensor is sensistor micropressure difference sensor, the wind speed transducer is a hot-bulb balanced breeze speed transducer, the pressure difference is sensistor resistivity balanced micropressure transducer and the data processor is CPU or MPU data processor. The method can be used on the above device. The invention can accurately detect the failure, damage of the filter (HEPA or ULPA) and accurately alarm, which can also conduct automatic supplementing and controlling.

The invention relates to a high-accuracy universal adjustable V-shaped positioning tool, and belongs to the technical field of machining. One of two V-shaped support assemblies of the tool comprises abase on a left adjustable sizing block assembly and a right adjustable sizing block assembly; a left sliding block assembly and a right sliding block assembly separated relatively are arranged on each base; a sliding ring is arranged under each sliding block assembly; the sliding rings and adjusting screw rods form screw pairs; the adjusting screw rods under each left sliding block assembly and each right sliding block assembly are provided with screw threads with opposite rotation directions; the adjacent ends of each two adjusting screw rods are fixedly connected through a clamping couplingassembly; each adjustable sizing block assembly comprises a lower base; an adjusting bolt of each adjustable sizing block assembly and a middle sliding block form a screw pair; the upper surface of each middle sliding block is laminated with the lower surface of an upper pressing block; the upper pressing blocks and the bases form vertical movement pairs; and end surface meshing structures are formed at opposite ends of the adjusting bolts of the left adjustable sizing block assemblies and the right adjustable sizing block assemblies, and mesh with corresponding structures at two ends of thecoupling assemblies, so that couplings are restrained. The high-accuracy universal adjustable V-shaped positioning tool provided by the invention is suitable for step shaft parts with various specifications, good in universality, convenient to operate, and high in accuracy.

The invention provides a four-rotor unmanned aerial vehicle feedback linearization control method based on a fuzzy extended state observer. The method comprises the following steps: establishing a four-rotor unmanned aerial vehicle system model, and initializing the system state and controller parameters; designing a tracking differentiator; designing a non-linear extended state observer; establishing a fuzzy rule; and designing a feedback linearization controller. The designed extended state observer is used for estimating system model uncertainty and external disturbance; through a pole assignment method, an initial value of the parameters of the extended state observer can be determined; through introduction of the fuzzy rule, the parameters of the extended state observer are subjected to on-line setting; and through feedback linearization, a closed-loop system is approximate to a linear system, thereby improving system stability, ensuring system tracking error can be quickly stabilized and converges to zero, and realizing quick and stable position tracking and posture adjustment of a four-rotor unmanned aerial vehicle. The method solves the problem of system model uncertainty and external disturbance, improves system performance and realizes quick and stable position tracking and posture adjustment of the system.

The invention belongs to the field of LED drive control, and provides an LED constant current drive chip and device, and an LED lamp. The drive chip comprises a power-off detection module, a circulating counter, a coding and decoding module, a pulse width modulation module, a first constant current drive module, and a second constant current drive module. When the power-off detection module detects that the conduction time of a switching tube reaches preset maximum conduction time and the switching-off time of the switching tube is less than preset overvoltage protection switching-off time, a power switch is judged to be switched off and the circulating counter is controlled to carry out shifting. The coding and decoding module controls a corresponding LED lamp string to emit light according to the shifting result when the power switch is switched on again, so as to achieve the color temperature adjustment. The pulse width modulation module drives the corresponding LED lamp string to emit light through a preset current, so as to adjust the brightness, thereby enabling the drive chip to accurately carry out the color temperature adjustment and brightness adjustment of the LED lamp string under the control of the power switch.

The invention provides an underground lane control gas supply side line gasification furnace. The furnace comprises a coal gas passage, multi-drill holes which are drilled directionally on the bottom of a coalbed in the coal gas passage, a gas supply lane, a gas supply pipe and a plurality of temperature pressure and flow testing instrument valves arranged in a base plate rock of the coalbed, and a gas supply branch pipe between the gas supply lane and the multi-drill holes. The system has a simple structure, easy configuration and reliable operation. The furnace capable of carrying out simultaneous multi-point gasification has the advantages of higher output, gas supply protection, controllability, adjustment as required, and the like. The furnace can solve a plurality of problems of poor gasification effect, discontinuous and unstable gas production, small gas output, low gasification rate, and the like.

The invention relates to a self-sealed deodorization overflow-prevented floor drain. The principal part of the floor drain is set a bevel technology imbricated plate that has a knock-down block-type discharging pipe with tongue in it. There is sealed cushion at the bottom of the discharging pipe, and the dummy club matched to the tang on the inner wall of corresponding to the principal part of the floor drain is set outside of the pipe. Inner the discharging pipe there is discharging clamp plate with axial sleeve that has water leakage hole and an active discharging sewage storage pot. In the axial sleeve there is a clamp plate permanence magnet. The discharging clamp plate connects to the adjusting axial sleeve by screw. Lifting shaft is set in the adjusting axial sleeve and its top has lifting shaft permanence magnet. The self-sealed tie plate is connected to lining plank by locknut. The invention has a wide using foreground.

The invention discloses a method and device for acquiring the resource utilization situation, and relates to the field of data maintaining. The method and device are used for solving the problem that the requirement for the technical experience of managers during load adjusting is high. The method for acquiring the resource utilization situation comprises the steps that the actually-used-resource information and started-resource information of each resource in a data center are acquired at the sampling time points of each day; the resource utilization rate of each resource at the sampling time points of each day is determined, and the resource utilization rate is the specific value of the actually-used-resource information to the started-resource information; the resource utilization tendency of each resource within preset days is acquired according to the resource utilization rate of each resource at the sampling time points of each day; the resource utilization tendencies of all resources are displayed at the different positions of a display interface at the same time so that the managers can determine the resource adjustment strategy according to the displayed content. The method and device are mainly used in data center resource managing.

The invention discloses a satellite dynamic and static balance test and adjustment device, comprising: a satellite body to be tested is fixed on a satellite connection disc. The satellite connecting disk is connected with the plane of the connecting disk of the dynamic balancing machine, and is fixed with positioning pins to form a transitional tooling. The transition tooling can move horizontally in X and Y directions on the dynamic balancing machine. The connecting disc of the dynamic balancing machine is fixed on the plane of the dynamic balancing machine with connecting bolts, and there is an adjusting gasket in the middle. A fixed support is installed on one side of the planar main table of the dynamic balancing machine, and an adjusting screw is arranged on it. The invention also discloses the test and adjustment method of the dynamic and static balance test and adjustment device, adopts the technical scheme of "torque-couple balance method", and achieves the problem of completing the satellite dynamic and static balance test and adjustment at one time, which not only improves the efficiency of test and adjustment Accuracy, and the adjustment time is reduced from 7 days to 2 days.

The invention relates to an experiment device for simulating the power response of a vertical pipe array under the action of uniform flow, and the device comprises a deep sea vertical pipe group module. The top of the deep sea vertical pipe group module is connected with a top multi-pipe relative position adjustment module through a vertical end part adjustment module, and the bottom of the deep sea vertical pipe group module is connected with a bottom multi-pipe relative position adjustment module through the vertical end part adjustment module. The top multi-pipe relative position adjustment module, the bottom multi-pipe relative position adjustment module, the vertical end part adjustment module and the deep sea vertical pipe group module jointly form a vertical pipe array system. The top of the vertical pipe array system is connected with a top movement module, and the bottom of the vertical pipe array system is connected with a bottom movement module. A measurement analysis module is disposed on the top movement module. The device is simple in structure, can achieve the quick and convenient change of the working conditions in an experiment process, is high in flexibility, is easy to operate, is precise in measurement, can truly simulate a condition that a vertical pipe array is disposed in a uniform flow field environment, and analyze the vortex-induced vibration response of the vertical pipe array under the action of uniform flow.

The invention belongs to the technical field of horizontal rotation construction for bridges, and particularly relates to a device and a method for accurately positioning a spherical hinge. The device and the method solve problems that repeated adjustment is required, the work efficiency is low, the accuracy is poor, and the like when a lower spherical hinge is positioned during horizontal rotation construction. The device for accurately positioning the spherical hinge comprises locking portions, fine adjustment tray sliding devices and a measuring portion. The measuring portion comprises three prisms, and the three prisms are mounted at the edge of the lower spherical hinge, are arranged along a plumb line, are mounted on the same radius circumference of the edge of the lower spherical hinge and are arranged to form an equilateral triangle. The method for accurately positioning the spherical hinge is implemented by the device for accurately positioning the spherical hinge. The device and the method have the advantages that fine adjustment operation is easy and convenient, and the spherical hinge can be accurately measured and adjusted and is high in positioning accuracy; and the spherical hinge can be quickly positioned, the positioning efficiency is high, the construction progress can be effectively accelerated, and the work efficiency is high.

The invention discloses a self-adaption tension control device and method of electrode wires of a linear cutting machine. The device comprises a rack, a wire storage cylinder, transition reversing wheels, an upper machine head and a lower machine head; the wire storage cylinder is arranged on the rack, and the upper machine head and the lower machine head are each provided with a main guide wheel; the electrode wires, wound on the wire storage cylinder, all the reversing wheels and the guide wheels form a wire winding loop, and the position, arranged between the upper machine head and the wire storage cylinder, of the rack, and the position, arranged between the lower machine head and the wire storage cylinder, of the rack are each provided with a shaft type tension sensor; each shaft type tension sensor is provided with a tension detection wheel through a bearing, and the electrode wires are wound on the two tension detection wheels to form wrap angles; each shaft type tension sensor is connected with a single chip microcomputer; two parallel guide columns and a lead screw and nut pair are arranged on the rack, and a lead screw is mounted on the rack and is parallel to the two guide columns; a servo motor is connected with the lead screw through a synchronous belt wheel mechanism, and a sliding seat is fixedly connected with the nut and is arranged on the two guide columns in a sliding manner; a tensioning wheel is arranged on the sliding seat, and the electrode wires are wound on the tensioning wheel. According to the device, tension of the electrode wires on the machining segment can be more precisely detected and adjusted, and therefore the machining quality is improved.

The invention provides a aftersound eliminating data automatically alignment method, the steps are following: step 1, receiving the audio frequency data sampled by audio frequency sampling module and audio frequency playing data sampled by the audio frequency playing data; step 2. The audio frequency sampling data and audio frequency playing data are transferred into audio frequency format supported by aftersound suppressor; step 3. The audio frequency sampling data and audio frequency playing data which are after transmission are written into data buffer area; step 4. When the data buffer area is written completely, aligning the audio frequency sampling module and audio frequency playing module; step 5. The audio frequency sampling module and audio frequency playing module aligned are placed into the aftersound eliminating module for process, sending the sampling data block; step 6. Return step 1. By adopting the invention, the audio frequency data is aligned automatically in buffer, and then they are sent into the aftersound suppressor, it can increase the aftersound eliminating capability of the aftersound eliminating module.

The invention discloses an automatic control method of mold temperature in a rotational molding process, which is characterized in that an infrared temperature sensor is used for monitoring the surface temperature of a rotational molding mold, an electric actuation mechanism which is installed on a gas pipeline is used for controlling the gas flow, so that the rotational molding temperature can be automatically controlled. Through a servo motor which is installed on a rotational molding machine, a support which is provided with the infrared temperature sensor is driven by a lead screw to move back and forth, the temperature of the rotational molding mold in the axial direction can be measured, a temperature signal is inputted to an industrial control computer after being processed, a temperature chromaticity of the rotational molding mold body and a two-dimensional temperature distribution histogram are generated, a temperature difference signal is converted to a corresponding flow signal through a signal processing module according to the difference between a temperature monitoring value and a given temperature value, the electrical actuation mechanism on the corresponding pipeline is controlled to adjust the openness of a valve so as to control the gas flow, so that the closed-loop control of the temperature in the rotational molding process can be realized. Due to the adoption of the automatic control method, the labor intensity is greatly alleviated, the precision is improved, and the automatic control on the temperature in the rotational molding process can be realized according to the rotational molding requirement.

The invention discloses an isolation switch circuit and a control method thereof. Control and adjustment of a primary edge and a secondary side are performed by first time information as characteristic, a photocoupler is not needed to transmit information of the primary edge and the secondary side, the primary edge is used for identifying first time by detecting voltages of two ends of a main power switch tube, the secondary edge is used for obtaining a first control signal representing information of the first time by sampling an output voltage or / and an output current and comparing with a corresponding reference signal, the primary edge can be used for adjusting second time and a peak current according to the information of the first time, the first control signal is higher than a thirdthreshold, the isolation switch circuit works at a fixed frequency, and the isolation switch circuit enters a continuous conduction mode or an interrupted conduction mode under the fixed frequency. The photocoupler is not needed to perform signal isolation and transmission of the primary edge and the secondary edge, the circuit cost is reduced, the freewheeling time of a parasitic diode of a synchronous rectification tube is used as the characteristic for identification and control, and control and adjustment are more accurate.

The invention discloses an installation device for a centrifugal overload test of a solid rocket engine. The installation device comprises a rotating arm, an installation platform and steel wire tensioning mechanisms, wherein the installation platform is rotatably connected with the outer end of the rotating arm through a rotating shaft system; the rotating arm is internally provided with a plurality of lifting bolts; a cavity is formed between each lifting bolt and the installation platform; the steel wire tensioning mechanisms are arranged in the cavities; the first end of each steel wire tensioning mechanism is fixedly connected with the corresponding lifting bolt, and the second end of each steel wire tensioning mechanism is fixedly connected with the installation platform; a test piece is arranged in the installation platform. According to the installation device disclosed by the invention, the rotating shaft system has a locking function, bears the mass of a rotating cabin and installation parts in the rotating cabin and a transferred force and is conductive to installing the test-piece and adjusting the angle of the test-piece; in the meantime, the steel wire tensioning mechanisms are simple in structure, convenient to operate, not only are capable of overcoming the torque generated by centroid change in a test-piece ignition process, but also are applicable to length and angle change generated when the rotating cabin is installed in different angles.