30results about How to "Achieve stability control" patented technology

An image vibration-compensating apparatus and a method thereof are provided. The apparatus and the method are applied in an image-capturing apparatus, such as a digital still camera (DSC) or digital video recorder (DVR), for compensating image vibration when capturing an image. The image vibration-compensating apparatus comprises an adaptive edge extractor, a sub-region movement detector, a frame motion calculator, and a correcting vector generator. The image vibration-compensating apparatus analyses the difference between the current image and the previous image, and outputs the correcting motion vector to achieve the function of image vibration-compensation. In the image vibration-compensating method, an accumulate compensation mode is used to prevent fast motion of an image frame which will cause discomfort of the user's eyes when a relatively large image vibration occurs in a short period.

The invention belongs to the technical field of micro-positioning platforms. The invention discloses a micro-positioning platform based on piezoelectric ceramic driving and a modeling and control method thereof. The micro-positioning platform comprises a hardware part and a software part, the software part comprises Simulink software loaded in an industrial personal computer, and communication connection between the industrial personal computer and a data collection card is realized based on the software part to form closed-loop deviation control; the modeling method adopts a Hammerstein modelas a modeling basis, and comprises a static nonlinear part and a linear dynamic part: constructing a static nonlinear function based on a Boc-Wen model, and identifying unknown parameters of the model by adopting a particle swarm algorithm; a linear dynamic model is constructed, the model is equivalent to a linear second-order time-invariant system, and a Matlab recognition toolbox is adopted inthe model to obtain parameters; according to the control method, a composite control mode of feedforward control and feedback control is adopted; in conclusion, the high-precision positioning device has a high-precision positioning effect.

The invention relates to a self-adaption low-order controller for an unmanned helicopter. The self-adaption low-order controller for the unmanned helicopter comprises a planner, an identifier, a structural filter, an inner mold controller, a dual-ring slip form controller and a control component comprehensive module, wherein the planner is used for monitoring control input and control output of a controlled system, and the identifier is utilized for performing online identification and start the structural filter, the inner mold controller and the dual-ring slip form controller to perform controller parameter correction when homeostatic control output of the controlled system cannot meet a preset requirement; the structural filter is used for performing correction control on a filtering link of the inner mold controller; the inner mold controller is used for performing prediction control on an inner model and feedback correction of the controlled system; the dual-ring slip form controller is used for performing track control on posture angles and posture angular speed; the control component comprehensive module is used for summarizing control components to obtain a control component of the controlled system. The self-adaption low-order controller disclosed by the invention solves the problem of complex high-order dynamic robust control of a space junk capture system in the situations of unknown bounded interference, thrust error and location error and also brings convenience to processing control constraint and state constraint.

The invention discloses a method and a system for stabilizing the processing strength of a drum-type cut tobacco dryer. The invention discloses the method and system for stabilizing the processing strength of a drum-type cut-tobacco dryer, which belong to the technical field of tobacco control, and comprise the following steps: a mathematical model of the processing strength of the cut-tobacco dryer and moisture loss of cut-tobacco processing is established, and a dynamic prediction system of the processing strength of the cut-tobacco dryer is established based on the mathematical model; before production procedures of tobacco leaf moistening and feeding, the processing strength dynamic prediction system automatically predicts moisture loss of each subsequent procedure section according tothe mathematical model, adjusts and sets moisture at an outlet of the tobacco leaf moistening and processing procedure, and stabilizes the dehydration amount of the cut-tobacco dryer so as to stabilize the processing strength of the cut-tobacco dryer; when a cut tobacco drying process begins, the processing strength dynamic prediction system performs cut tobacco drying outlet moisture correctionaccording to a correction model by collecting the actual value of the cut tobacco drying inlet moisture so as to stabilize the mean value of the batch-to-batch dehydration amount of the cut tobacco drying process, greatly reduce the batch-to-batch fluctuation range of the dehydration amount of the drum-type cut tobacco dryer and stabilize the product processing strength.

The invention relates to the field of wind speed and wind direction measurement, in particular to a wind speed and wind direction measurement method and device based on a floating platform, and the method comprises the steps: obtaining integrated navigation information, and calculating the ground speed and attitude conversion matrix of the floating platform according to the integrated navigation information; acquiring atmospheric data measurement information, and calculating the vacuum speed of the floating platform according to the atmospheric data measurement information; and obtaining a ground speed and attitude conversion matrix of the floating platform and a vacuum speed calculation result, and calculating the wind speed and wind direction of the floating platform to obtain the wind speed and wind direction of the floating platform. The technical scheme is convenient and flexible to use, the problem that a common wind measurement method is not suitable for large-area continuous real-time wind speed and wind direction measurement is solved, the wind resistance of the floating platform is improved, and stable control over the platform is achieved.

The invention relates to a high-speed jacquard warp knitter, comprising a warp knitting device and a jacquard mechanism arranged above the warp knitting device. The jacquard mechanism comprises a jacquard thread, a jacquard needle and a jacquard thread transmission mechanism, the upper end of the jacquard thread is connected to the jacquard thread transmission mechanism, the lower end of the jacquard thread is connected to the jacquard needle, the jacquard needle corresponds to a warp of the warp knitting device, the high-speed jacquard warp knitter also comprises a guide mechanism, the guide mechanism comprises a first guide plate, a second guide plate, a guide rod and a mounting block, vertical movement of the jacquard needle is guided through the first guide plate, the second guide plate, the guide rod and the mounting block such that the vertical movement of the jacquard needle is protected from disturbance by jacquard thread skewing, the warp can be operated better, warp tension is stably controlled, and jacquard quality of warp knit is improved. The high-speed jacquard warp knitter has the advantage of simple structure and is suitable particularly for a jacquard warp knitter requiring multiple jacquard needles.

The invention discloses an insulator clamping jaw. The insulator gripping jaw comprises a connecting frame, two clamping jaws, two clamping jaw arms, two connecting rods, a screw rod and a sliding block, the two clamping jaw arms are rotationally installed at the first end of the connecting frame and are symmetrically distributed, the first ends of the two clamping jaw arms are connected with theclamping jaws correspondingly, and the second ends of the two clamping jaw arms are connected with the sliding block through connecting rods correspondingly. A mounting cavity is formed in the connecting frame; the sliding block is slidably mounted in the mounting cavity; the screw rod is rotationally mounted on the connecting frame, movably penetrates through the sliding block and is in threadedfit with the sliding block, and the first end of the screw rod extends out of the second end of the connecting frame; the first ends of the two connecting rods are hinged to the second ends of the clamping jaw arms respectively, and the second ends are hinged to the sliding block respectively. The opening and closing degree of the arc-shaped clamping jaw can be stably controlled, the grabbing andclamping efficiency is improved, and smooth operation of insulator maintenance and monitoring work is guaranteed.

The invention provides a liquid metal antenna and a control system and method thereof. The liquid metal antenna comprises an antenna body, the antenna body comprises a substrate, a first elastic layer and a feed port, the first elastic layer is fixedly installed on the substrate, a filling cavity is formed between the first elastic layer and the substrate, one end of the feed port is communicated with the filling cavity, the lower part of the substrate is provided with a discharge structure, and one end of the discharge structure is communicated with the filling cavity. Through large-scale deformation of the first elastic layer, the first elastic layer can be attached to the wall surface and the corner of the filling cavity, so that the liquid metal in the filling cavity can be completely discharged, the residual rate of the liquid metal is reduced, an acidic or alkaline solution does not need to be used, stable control of the antenna is realized, and the antenna can work stably.

The invention relates to a stable frequency control method and system of a microgrid. The method comprises: a controller of a micro source collects a frequency value of a bus of a microgrid in real time; according to the frequency value and a preset frequency fluctuation zone, a frequency fluctuation zone where a bus frequency is located is determined; on the basis of the frequency fluctuation zone, a corresponding stable frequency control scheme is obtained; and the bus frequency of the microgrid is controlled stably based on the stable frequency control scheme. According to the method and system, the frequency value of the bus of the microgrid is collected in real time by the controller of the micro source and the a frequency fluctuation zone where the bus frequency is located is determined based on the frequency value and the preset frequency fluctuation zone; and according to the determination result and preset control schemes of different frequency fluctuation zones, coordinated control of the micro source, the energy storage system, and the load is realized, so that the fluctuated frequency can be restored rapidly for stability. And thus stable control of frequency fluctuation of the microgrid at different ranges can be realized.

The invention relates to the technical field of solder paste welding, in particular to a welding system for solder paste packaging of an electronic connector, which comprises a middle column, a top plate is fixed at the top end of the middle column, a control lifting frame is connected to the bottom end of the middle column, a square hole is formed in the middle of the middle column, and a swing assembly is arranged in the square hole. The swing assembly comprises a control cylinder, a center shaft, supporting frames, a brake device and an outer plate frame, the center shaft is movably sleeved with the middle of the control cylinder, the end of the center shaft is fixed to the center column, and the supporting frames are fixed to the two sides of the control cylinder; according to the structural design, solder paste smearing work of a paste injection gun, sticking work of a connector element and heating and blowing work of a hot air gun are carried out in a segmented mode, the three control working mechanisms are separated from one another, and mutual influence of work caused by too close work is avoided; and when one working mechanism works, the other two working mechanisms can be separated from each other, so that automatic control is realized.