552results 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.

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 present invention provides a near-eye display device that automatically adjusts the optical system. The near-eye display device includes an optical system, a camera unit, a processing unit, and a motion unit. The camera unit and the motion unit are electrically connected to the processing unit. connected, the optical system includes a lens unit and a display unit, the camera unit includes a camera device with a fixed focal length and orientation, and the camera device includes a left camera device and a right camera device. Compared with the prior art, the present invention adopts the method of separately measuring and adjusting the coordinate position of the unilateral pupil, which can not only measure the user's interpupillary distance, but also measure the displacement of the user's unilateral pupil from the central position and adjust the corresponding position separately according to the measurement result. The side optical system makes the measurement and adjustment more accurate, ensures a better display effect, and avoids possible deviations caused by only measuring the interpupillary distance to adjust.

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 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 discloses a leveling method suitable for a compound level gauge. According to the leveling method, an angle i of the compound level gauge for dual observing can be accurately measured and adjusted according to FORMULAE (details in description), so as to meet a measurement accuracy requirement; and then, steps b1, b2, b3 and b4 are carried out to carry out two-point altitude difference measurement. The steps b1, b2, b3 and b4 are as follows: b1. respectively measuring an altitude difference between Pk and Pk+1 by utilizing a compound level gauge A and a compound level gauge B; b2. calculating the difference epsilon among the altitude differences between the Pk and the Pk+1 which are measured by utilizing the compound level gauge A and the compound level gauge B; b3. judging whether the absolute value of the epsilon exceed a limit, if the absolute value of the epsilon is within a tolerance, and carrying out the step b4, and if the absolute value of the epsilon is out of tolerance, repeating the steps b1, b2 and b3; and b4, allowing the mean value of the altitude differences between the Pk and the Pk+1 which are measured by utilizing the compound level gauge A and the compound level gauge B as a measured value.

The invention discloses a screen brightness adjustment method and a television, wherein, the adjustment method comprises the following steps: a. carrying out brightness adjustment on account of the reference screen provided by a display device to determine the brightness reference value Y0; b. comparing the brightness average value Y of each screen with the brightness reference value Y0 when the display device displays video programs normally; if Y0-delta Y<=Y<=Y0+delta Y, then carrying out no adjustment on the brightness of the current screen; if not, adjusting the brightness average value ofthe current screen to be Y0 from Y, wherein, delta Y is the allowable error value; and c. displaying the current screen. The screen brightness adjustment method in the invention can ensure that the screen brightness value can be automatically adjusted according to screen content by the display device, thus ensuring that the screen brightness of the video programs is in an extent in which users feel comfortable all the time in the playing process, not only avoiding the trivial manual adjustment process, but also ensuring more accurate adjustment effects, and in particular being applicable to promotion and application in television products.

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 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 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 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.