31results about How to "To achieve the purpose of dynamic adjustment" patented technology

The invention provides an under-actuated AUV (autonomous underwater vehicle) three-dimensional trajectory tracking control method based on biological speed regulation. The method comprises the following steps: (1) giving expected trajectory position information by an AUV according to the current task, and obtaining current position and attitude information; (2) obtaining position and attitude error variables by use of the mathematical model of an under-actuated UUV (unmanned underwater vehicle); (3) calculating a virtual control law by a method of defining a virtual speed error variable; (4) finishing dynamic regulation of the speed error through a biological inspiration model; and (5) deducing a dynamic speed regulation controller. In the method provided by the invention, the speed error of the under-actuated AUV can be dynamically regulated, the performance of the controller is improved while the singular value of the traditional back-stepping method occurring when the heading angle error is 90 degrees is avoided, and accurate tracking of a time-varying three-dimensional trajectory is realized under external constant disturbance.

The invention discloses a voice broadcasting method and a voice broadcasting device. The method comprises the following steps: in a process that a target user drives, acquiring a first broadcasting duration of a to-be-broadcasted target voice and the current driving speed of the target user, wherein the target voice is a voice needed to prompt before the target user arrives at the target position in a navigation process; calculating the driving distance of the target user in the first broadcasting duration according to the first broadcasting duration and the current driving speed; judging whether the distance from the current position of the target user to a preset position is smaller than or equal to the driving distance or not, wherein the distance between the preset position and the target position is a preset distance; and if the distance from the current position of the target user to a preset position is smaller than or equal to the driving distance, starting to broadcasting the target voice from the current position. The method and device disclosed by the invention solve the technical problem of inaccurate position of the voice broadcasting in the related art.

The invention discloses dynamic regulation type sonic speed changing pressurization heat exchanging device, and comprises a front two-way pipe (1), a steam jet pipe (11), a middle three-way pipe (2), a middle two-way pipe (7), a diffusing pipe (13) and a rear two-way pipe (8). The steam jet pipe is coaxially arranged in the middle three-way pipe, the diffusing pipe is embedded between the middle two-way pipe and the rear two-way pipe, an adjustable core (3) is arranged between the middle three-way pipe and the middle two-way pipe, the adjustable core (3) can make axial fore and aft horizontal movement, the center thereof is provided with an axially interpenetrated mixing chamber (12), the mixing chamber consists of a conical curve line part and a horizontal straight line part, wherein, the conical curve line part is a flow regulating section (10) which is used for regulating the inlet water flow, and the horizontal straight line part is a state and pressure regulating section (9) which is used to regulate the steam water mixing ratio in the mixing chamber. The invention achieves the goal of dynamic regulation in the condition of not stopping the system operation when the steam water parameter changes, makes the steam water mixing mass ratio and pressure ratio in the heat exchanger be in the optimum condition, effectively reduces the equipment operation noise and the operating cost, as well as enhances the heat transfer efficiency and the operation safety.

The invention discloses a composite control method for a first-order inertia pure lag process, and relates to a model prediction control-active disturbance rejection control composite control method for the first-order inertia pure lag process. The method comprises the steps that firstly, an active disturbance rejection controller is designed based on the first-order inertia pure lag process, theclosed-loop characteristic of the active disturbance rejection controller is made to be close to an expected dynamic equation, then a model prediction controller is designed according to the expecteddynamic equation, and the output of the model prediction controller is the set value (input value) of the active disturbance rejection controller. On one hand, the set value of the active disturbancerejection controller can be optimized; and on the other hand, ADRC can better overcome the influence of uncertainty caused by internal and external disturbance, so that the closed-loop response of thecontrolled process is always close to the expected dynamic equation, thereby ensuring that the MPC performance taking the expected dynamic equation as the prediction model is not seriously deteriorated, and improving the robustness of the MPC performance.

The invention discloses a large-caliber variable sonic speed pressurizing heat exchange device. The device consists of a front reducing pipe (1), a steam jet pipe (2), a tee pipe (3), a short two-way pipe (4), a long two-way pipe (6), a back reducing pipe (7), a front mixing chamber (9) and a back mixing chamber (5), wherein the steam jet pipe is inserted into the tee pipe coaxially; the tee pipe is connected between the front reducing pipe and the short two-way pipe; the long two-way pipe is connected between the short two-way pipe and the back reducing pipe to adjust water inlet flow and steam-water mixing proportion inside the mixing chambers; and the back mixing chamber is arranged inside the short two-way pipe and improves the stream and field state of steam-water mixture through changing circulation section area. Through improving the structures of the mixing chambers, the large-caliber variable sonic speed pressurizing heat exchange device can effectively improve the stream and field state of the steam-water mixture so as to ensure that steam-water mixing mass ratio and pressure ratio inside a heat exchanger are always in the best state. Moreover, the large-caliber variable sonic speed pressurizing heat exchange device effectively reduces equipment operation noise and operation cost and improves heat exchange efficiency and operation safety. When a steam-water parameter of a system is changed, dynamic adjustment can be realized through adjusting the positions of nozzles and the mixing chambers.

The invention belongs to the fitting device of a loom and particularly relates to a device for controlling tension dynamic balance of warp threads of the loom. The device comprises a resistance disc (5), a resistance rope (6), a spring (9) and a fixed bracket (7); the resistance rope (6) is connected with the resistance disc (5); the fixed bracket (7) is shaped like T or 7; two ends of a transverse rod of the fixed bracket (7) are connected with a stander (1) and a guide roller (8) respectively; the lower end of a vertical rod of the fixed bracket (7) is connected with a tension balance bracket (2); the vertical rod body is connected with a displacement adjusting device (4); one end of the resistance rope (6) is connected with the displacement adjusting device (4) and the other end thereof is connected with the external end of the tension balance bracket (2); the tail end of the external end of the tension balance bracket (2) is connected with a tension balance roller (12); and the tension balance bracket (2) is connected with the fixed bracket (7) by a spring displacement adjusting device (10) and the spring (9). The device achieves the object of dynamically adjusting balance, generates an error of less than 0.25 percent during the operation process, and has small swing amplitude and stable tension control.

The invention belongs to the technical field of 3D printing, and provides a feedback type 3D printer, aiming at solving the technical problems that various raw materials cannot be used, high-pressurefast jet printing cannot be performed by the existing 3D printer. The feedback type 3D printer includes a print head and a printer body for driving the print head to move in a three-dimensional space.The print head comprises a shell and a mixing shaft, wherein a hot melting part made of plastic is arranged in the shell; the hot melting part is provided with a circular truncated cone-shaped hot melting cavity with a large upper part and a small lower part; the hot melting part is covered with an electromagnetic heater; a sealing cover is arranged on the hot melting cavity; a pressure relief valve is arranged on the sealing cover; a material injection opening is formed in the bottom of the hot melting part; the mixing shaft is provided with spiral mixing blades; both the mixing shaft and the mixing blades are made of metal; the diameters of the mixing blades on the mixing shaft are gradually reduced; the mixing blades can also be in contact with the inner side face of the hot melting cavity simultaneously; a driving shaft is fixed to the top of the mixing shaft; the seal cover is provided with a through hole through which the driving shaft can pass; and driving teeth are arranged onthe driving shaft.

The invention discloses a font adjusting method and device based on face recognition, equipment and a medium. The font adjusting method comprises the steps: collecting a first face image of a system at the current time through employing a camera on an intelligent terminal, and enabling the first face image to correspond to a user identification; performing face matching on the first face image based on a historical face image in a face database corresponding to the user identifier to obtain a face matching result; if the face matching result is matching failure, continuously acquiring a secondface image corresponding to each moment by adopting the camera; performing action analysis on the second face images corresponding to two adjacent moments to obtain an action analysis result; and dynamically adjusting the current font displayed on the screen of the intelligent terminal based on the action analysis result. The font adjusting method does not need manual adjustment of a user, reduces font adjustment complexity and improves font adjustment efficiency.

The invention provides a method and device for adjusting a multimedia decoding information buffer area. The method comprises the following steps: judging whether needs to redistribute the buffer area based on a multimedia parameter acquired by the decoding data when monitoring the accomplishment of the multimedia information decoding, thereby buffering the decoding data; when judging needing to redistribute the buffer area, determining redistributed buffer area based on the multimedia data; and buffering the decoding data to the redistributed buffer area. By use of the technical scheme provided by the invention, an aim of dynamically adjusting the preset buffer region based on the multimedia parameter of to-be-played multimedia information, the lagging or error condition existing in the playing of the to-be-played multimedia information is avoided when an operation of smoothly playing the to-be-played multimedia information is satisfied; and meanwhile, the occupancy of the redundant system memory can be reduced, the influence on the system running performance of the playing equipment and the running of other applications can be avoided, and the use experience of a user is improved.

The invention relates to a euphausia superba trawl net plate variable water layer adjusting mechanism and method. The adjusting mechanism comprises a net plate, a lifting adjusting mechanism, a warp connecting block and a controller, wherein the lifting adjusting mechanism is installed on the inner side of the middle of the front end of the net plate along the height direction of the net plate, the warp connecting block is installed on the lifting adjusting mechanism and can be driven by the lifting adjusting mechanism to ascend and descend, the warp connecting block is connected with a warp,and the controller controls the driving of the lifting adjusting mechanism. A posture of the net plate can be dynamically adjusted in the fishing operation process, and the purpose of adjusting a depth of a trawl variable water layer is achieved.

The invention belongs to a heating-type dynamically adjustable steam-water directly mixing heat exchange device comprising a front three-way valve (1), a front core (2), a middle three-way valve (3), a middle core (4), a rear two-way valve (5), a temperature sensor, an electric operator and a controller, wherein the front core (2) is coaxially arranged in the middle three-way valve (3); and the middle core (4) is embedded between the middle three-way valve (3) and the rear two-way valve (5). The heat exchange device is characterized in that an adjusting device (7) is arranged between the front core and the middle core, can move forwards and backwards horizontally in the axial direction under the drive of the electric operator, and comprises a water direction adjusting surface (14) and a steam direction adjusting surface (15); the steam flow can be controlled by adjusting the variable sectional area formed by the steam direction adjusting surface and the inner wall surface of a front core spray nozzle; and the water inflow can be controlled by adjusting the area formed by the water direction adjusting surface and the outer wall surface of the front core spray nozzle. When the steam parameter of a user changes, the purpose of continuous dynamic adjustment can be achieved under the condition that the operation of the system is not stopped.

The invention discloses an air conditioning method, device and equipment and a storage medium. The score of each index can be calculated according to an offset value, a preset unit offset influence weight and an initial weight of the index. If the sum of the scores is smaller than an expected threshold value, the deviation between at least one index in the indexes and the standard range value is too large, and adjustment needs to be carried out. According to the method, the index with the maximum offset weight is selected for adjustment, adjustment is carried out according to the preset step length corresponding to the index during adjustment, and all the steps are executed after the preset step length is adjusted. Experiments verify that the adjusting method can give consideration to multiple air quality indexes, and the adjusted object is changed to be the index with the maximum offset weight each time, so that the purpose of dynamically adjusting multiple index data is achieved, and the requirement of a user for healthy air is met.

The invention provides a method and device for constructing dynamic Poisson impedance attributes. The method comprises the steps of: obtaining an original logging curve and a logging interpretation conclusion curve of the whole well section of a research work area; averagely dividing the two curves into a deep logging curve, a middle logging curve and a shallow logging curve; respectively calculating a static Poisson impedance attribute curve, a hydrocarbon-containing pore curve and a fluid parameter curve with undetermined coefficients of corresponding depth sections according to the three logging curves and logging interpretation conclusion data; respectively carrying out correlation analysis on the three static Poisson impedance attribute curves with the undetermined coefficients and the hydrocarbon-containing pore curve of the corresponding depth sections to obtain the undetermined coefficient corresponding to the maximum correlation coefficient; obtaining fluid parameter average values corresponding to a deep layer, a middle layer and a shallow layer; performing linear fitting on the undetermined parameter values of the static Poisson impedance attribute curves of the deep layer, the middle layer and the shallow layer and the fluid parameter average values of the corresponding depth sections to obtain a linear relational expression; and obtaining a dynamic Poisson impedance attribute curve.