22results about How to "Improve dynamic characteristics" patented technology

This invention belongs to the field of robot joint technology, specifically relating to a rope-driven, decoupled, dual-parallel five-DOF bionic shoulder joint, including a scapulothoracic joint mechanism, a glenohumeral joint mechanism, a drive base device, and drive ropes. The scapulothoracic joint mechanism and the glenohumeral joint mechanism are internally rotatably connected. The drive base device is used to fix the scapulothoracic joint mechanism and to provide drive ropes for both mechanisms. The scapulothoracic joint mechanism is constrained by a first constraint branch, a second constraint branch, and a decoupling through-line branch, satisfying the pure rolling two-DOF rotation requirement, driven by two sets of antagonistic drive ropes. The glenohumeral joint mechanism is driven by four independent drive ropes to achieve three-DOF rotational motion. The decoupling through-line branches distribute the drive ropes of the glenohumeral joint mechanism, achieving physical decoupling and ensuring that the drives of the two mechanisms do not interfere with each other. Through rope-driven and dual-parallel passive mechanisms, a larger range of motion can be achieved, improving the stiffness and load-bearing capacity of the mechanism.

The application provides a high-dynamic force measuring device and method for a gas actuator, and relates to the technical field of force measurement of the gas actuator. The application discloses a high-dynamic force measuring device and method for a gas actuator, and relates to the technical field of force measurement of the gas actuator. The application discloses a high-dynamic force measuring device and method for a gas actuator, and relates to the technical field of force measurement of the gas actuator. The application discloses a high-dynamic force measuring device and method for a gas actuator, and relates to the technical field of force measurement of the gas actuator. The application discloses a high-dynamic force measuring device and method for a gas actuator, and relates to the technical field of force measurement of the gas actuator. The application discloses a high-dynamic force measuring device and method for a gas actuator, and relates to the technical field of force measurement of the gas actuator. The application discloses a high-dynamic force measuring device and method for a gas actuator, and relates to the technical field of force measurement of the gas actuator. The application discloses a high-dynamic force measuring device and method for a gas actuator, and relates to the technical field of force measurement of the gas actuator. The application discloses a high-dynamic force measuring device and method for a gas actuator, and relates to the technical field of force measurement of the gas actuator. The application discloses a high-dynamic force measuring device and method for a gas actuator, and relates to the technical field of force measurement of the gas actuator. The application discloses a high-dynamic force measuring device and method for a gas actuator, and relates to the technical field of force measurement of the gas actuator. The application discloses a high-dynamic force measuring device and method for a gas actuator, and relates to the technical field of force measurement of the gas actuator. The application discloses a high-dynamic force measuring device and method for a gas actuator, and relates to the technical field of force measurement of the gas actuator. The application discloses a high-dynamic force measuring device and method for a gas actuator, and relates to the technical field of force measurement of the gas actuator. The application discloses a high-dynamic force measuring device and method for a gas actuator, and relates to the technical field of force measurement of the gas actuator. The application discloses a

This invention discloses a variable-wave arc welding power supply control method, arc welding equipment, control device, and storage medium. Applied to an arc welding equipment, the equipment includes a coordination control module and at least two power conversion modules. The coordination control module is connected to the controlled terminals of each power conversion module to control the switching of the power conversion modules to form and output pulse power. The output terminals of each power conversion module are connected in parallel to superimpose the electrical energy of the arc welding power supply. The variable-wave arc welding power supply control method includes: the coordination control module outputting its corresponding control commands to each power conversion module; and each power conversion module adjusting the pulse width and on / off timing of the pulse power according to the control commands to increase the power or voltage amplitude of the arc welding power supply. This design optimizes the output waveform of the welding power supply, enabling it to provide excellent dynamic characteristics and improve welding performance.

The invention provides a control method and device for a network-forming type grid-connected converter. According to the output voltage stable value of the grid-connected converter under the two-phase rotating coordinate system and the current reference value of the filter inductor under the two-phase static coordinate system, the voltage and current inner loop control of the grid-connected converter is realized, the control performance of the grid-connected converter can be improved, and the stable operation of the grid-connected converter is ensured. According to the invention, the actual value of the output voltage of the grid-connected converter under the two-phase static coordinate system is calculated according to the actual value of the current of the filter inductor and the actual value of the voltage of the primary winding, so that the state feedback control of the grid-connected converter is realized, and the dynamic characteristics of the grid-connected converter can be improved. And the control dimension of the network construction type grid-connected converter can be effectively increased.

The utility model discloses a semiconductor device. The semiconductor device includes: a substrate; the buffer layer is positioned on one side of the substrate; the channel layer is located on the side, away from the substrate, of the buffer layer; the composite barrier layer comprises a first barrier layer and a second barrier layer, the first barrier layer is located on the side, away from the buffer layer, of the channel layer, and the second barrier layer is located on the side, away from the channel layer, of the first barrier layer; the band gap of the second barrier layer is larger than that of the first barrier layer; the dielectric layer is located on the side, away from the channel layer, of the composite barrier layer; the grid is located on one side, away from the composite barrier layer, of the dielectric layer; the source electrode is located on the side, away from the channel layer, of the composite barrier layer; and the drain electrode is positioned on one side, far away from the channel layer, of the composite barrier layer. According to the technical scheme, the dynamic characteristics of the depletion type gallium nitride semiconductor device are improved.

This invention provides a wind-powered propulsion device. One technical solution of this invention provides a wind-powered propulsion device disposed on a moving body, receiving wind to generate propulsion force. The wind-powered propulsion device comprises: a rotating body having a frame portion formed in an annular shape around a rotation axis, and capable of rotating around the rotation axis; and a plurality of blades, each fixed to the frame portion, and configured such that an imaginary straight line connecting the two ends of each blade in a direction orthogonal to the rotation axis is parallel to the frame portion. The plurality of blades includes a central blade whose imaginary straight line connecting the two ends of each blade passes through the center of the frame portion.

The application relates to the technical field of current measurement, in particular to a handheld optical fiber current measuring instrument which comprises a handheld shell, a protective optical cable and a collecting unit; the protective optical cable comprises a protective structure, a reflecting mirror, a sensing optical fiber, an optical fiber wave piece and a transmission optical fiber; the protective structure is coated on the reflecting mirror, the sensing optical fiber and the optical fiber wave piece; a reflecting mirror end closing structure is arranged at the position of the reflecting mirror; the two ends of the sensing optical fiber are connected with the optical fiber wave piece and the reflecting mirror respectively, and the optical fiber wave piece and the reflecting mirror are arranged close to each other; the other end of the optical fiber wave piece is connected with the transmission optical fiber, and the transmission optical fiber is connected with the collecting unit; the optical fiber wave piece, the transmission optical fiber and the collecting unit are all located in the handheld shell; the sensing optical fiber extends to the outside of the handheld shell to be sleeved at the preset position of a component to be measured. The handheld optical fiber current measuring instrument has a series of advantages such as good insulation performance, small volume, light weight, large measurement range, good dynamic characteristics, full digitization, simultaneous measurement of AC and DC signals and good portability.

The invention discloses an asymmetric fault cooperative ride-through control method for an offshore wind power flexible direct current system, the system comprises an offshore wind power plant, an alternating current collection system, an offshore MMC converter station and a direct current transmission submarine cable, the offshore wind power plant is composed of at least one wind turbine generator, and the wind turbine generator is connected with a grid through a generator side converter and a grid side converter. The method comprises the four steps of fault detection and sequence component extraction, determination of a total negative sequence current instruction of a system, control of a grid-side converter of a wind turbine generator set to inject limited negative sequence current, and control of a flexible DC converter station to compensate negative sequence current difference. The method has the technical advantages of giving consideration to overvoltage suppression and active power transmission, guaranteeing equipment safety, improving relay protection reliability, optimizing system dynamic characteristics and the like.

The invention belongs to the technical field of positioning and navigation, and particularly discloses a GNSS / DR (Global Navigation Satellite System / Digital Radio) tight integration navigation method based on an SINS (Strapdown Inertial Navigation System). The method comprises the following steps of: inputting a difference value between a pseudo range calculated by a GNSS (Global Navigation Satellite System) and a position calculated by an SINS (Strapdown Inertial Navigation System) into a filter as an observed quantity, and performing state error estimation; and correcting a navigation positioning result by using a state error estimation result, and outputting the corrected positioning result as a tightly integrated navigation positioning result. According to the scheme, the technical problems that an existing SINS / GNSS integrated navigation system is weak in anti-interference capacity, poor in system observability and low in precision are solved.

This invention discloses a method and system for estimating fuel cell parameters based on adaptive subset simulation. It transforms the updating of the posterior distribution of parameters into a structural reliability problem, constructs a limit state function using measurement data to form an intermediate failure domain, and generates conditional samples using the MCMC method to progressively approximate the target posterior probability distribution, thereby achieving parameter estimation of the fuel cell system. This method does not require a Gaussian prior assumption, can adaptively adjust algorithm parameters to ensure the reliability of the estimation results, and can comprehensively characterize the probability distribution of unknown parameters, achieving accurate estimation of fuel cell system parameters.

The invention relates to a conducting strip pressing force control method suitable for an automobile connector and a related device, and the method comprises the steps: obtaining motor current data and motor position data, generating a first force estimation value and a second force estimation value through a first calculation path and a second calculation path, calculating the instantaneous deviation of the first force estimation value and the second force estimation value in real time, and transmitting the instantaneous deviation into a fast feedback loop and a slow feedback loop; the fast feedback loop generates a short-term correction value to dynamically compensate the first force estimation value; the slow feedback loop accumulates the instantaneous deviation to generate a long-term drift distance, and when the long-term drift distance meets a preset aging judgment condition, self-adaptive updating of a reference force-displacement model or a first calculation path is triggered; and outputting the dynamically compensated first force estimation value as a final pressing force control instruction. According to the invention, while high-resolution dynamic response is realized, short-term drift can be corrected through a stable reference, and the reference has self-adaptive capability so as to compensate long-term drift caused by equipment aging.

The application discloses a kind of laser scanning cutting endoscope robots based on carbon fiber paper micro-vibration mirror, the endoscope robot is fixedly installed with paper transmission structure in one end of support structure, and the other end is fixedly installed with GRIN lens;Fixed mirror, X galvanometer and Y galvanometer are fixedly installed in paper transmission structure, and optical path is formed by optical fiber, GRIN lens, fixed mirror, X galvanometer and Y galvanometer;First piezoelectric bimorph driver and second piezoelectric bimorph driver are piezoelectric bimorph driver installed between support structure and paper transmission structure;First piezoelectric bimorph driver is used to drive X galvanometer to rotate around Y axis and / or by paper transmission structure;Second piezoelectric bimorph driver is used to drive Y galvanometer to rotate around Z axis by paper transmission structure.The above-mentioned endoscope robot is compact, light, stable in motion and has excellent dynamic performance by using piezoelectric bimorph driver and paper transmission structure.

The application discloses a piezoelectric driving mechanism bending deformation variable stiffness scanning probe, which comprises a base, a deformation mechanism and a probe needle, the deformation mechanism comprises two deformation units which are fixed in a stack, the deformation unit comprises a circular ring and at least three V-shaped cantilever beams, the at least three V-shaped cantilever beams are arranged in the circular ring, one end of the at least three V-shaped cantilever beams is connected with the circular ring, and the other end is connected with each other and the connection position is located at the center of the circular ring; piezoelectric driving units and strain sensing units are arranged between the V-shaped cantilever beams of the two deformation units, and all the piezoelectric driving units are connected in parallel; the circular rings of the two deformation units are fixedly connected with the base, and the probe needle is connected with the other end of the V-shaped cantilever beams. The application can realize the large-range variable stiffness of the scanning probe to adapt to different modulus surfaces while the static and dynamic performances of the scanning probe are considered.

The invention discloses a PID (Proportion Integration Differentiation) closed-loop control buck-boost conversion circuit, which comprises an input power supply end, an input ground end, an output voltage end, an input side half-bridge power stage, an output side half-bridge power stage, an inductor L11, a first gate driver U67, a second gate driver U68 and a controller. According to the invention, the output voltage is sent to the ADC to be collected by the MCU, and the PWM is adjusted in a closed-loop manner by using the software PID, so that the adjustable voltage-stabilizing output with high precision, no overshoot and good dynamic characteristics of the output voltage is realized.

This disclosure relates to a valve assembly for a shock absorber. The valve assembly includes: a valve housing including a first port and a second port; a pilot chamber in fluid communication with the first port and / or the second port, a pilot pressure determined by hydraulic pressure in the pilot chamber; and a main valve member axially movable within the valve housing along a longitudinal axis to restrict the main fluid flow between the first port and the second port in response to the pilot pressure acting on the main valve member. Furthermore, the main valve member is elastically loaded in a steady-state position, from which it is movable in two directions along the longitudinal axis and configured to move away from the pilot chamber during an initial pressure increase in the main fluid flow. The invention also relates to a method for controlling the flow of damping medium in a shock absorber.

A new type of single-casing slurry pump includes a shaft frame with a rotating shaft rotatably mounted inside. A flange is fixedly connected to one end of the shaft frame, and a protective sleeve is fitted onto the flange. Bolts are installed between the protective sleeve and the flange. Four impellers are fixedly mounted at the head of the rotating shaft, with the impeller inlet extending forward. The outer diameter of the back blade is smaller than the diameter of the cover plate. The impellers are located inside the protective sleeve, and a guide block is provided on the end face of the protective sleeve, slightly lower than the height of the cover plate, suitable for waterless sealing scenarios. The bearing assembly uses a mature lubrication structure, prioritizing synthetic grease to ensure bearing stability. The waterless sealing design solves the leakage problem of traditional seals, extending the maintenance cycle by more than 30%. The four impellers and optimized guide blocks improve pump efficiency by 5%-8%, and offer superior cavitation resistance compared to similar products. The back blades and the guide block on the protective sleeve reduce localized wear, extending the life of flow components by more than 20%, improving overall practicality.

The invention relates to a dynamic voltage restorer and a control method thereof, in particular to a high-power network construction type parallel DVR (Digital Video Recorder) for a transformer area and a control method thereof, which are used for solving various technical problems of the existing multi-module parallel DVR. According to the high-power network construction type parallel DVR for the transformer area, the change-over switch is arranged on the bus, the independent main control system is arranged in the converter parallel operation unit, and the main control system controls the change-over switch to be turned on or turned off to achieve working mode switching of the system. Meanwhile, the master control system and the three-phase converters form a master-slave relation for control, and the three-phase converters serving as slaves are in a current source mode, so that the three-phase converters are fast in dynamic response, free of circulating current and free of static errors; in addition, multi-machine parallel connection does not depend on synchronous signals for control, so that the multi-machine parallel connection is not restricted by a synchronous signal source.

The utility model relates to the technical field of power electronic silicon stack devices, in particular to a silicon carbide patch type ceramic diode. Comprising a ceramic shell, a silicon carbide chip, a lead-in electrode, a lead-out electrode, a copper-clad substrate and a bonding copper sheet, the silicon carbide chips are fixedly connected to the copper-clad substrates, the multiple copper-clad substrates are distributed in a matrix mode, the ceramic shell is of a rectangular box structure with an opening, grooves corresponding to the copper-clad substrates are formed in the inner bottom face of the ceramic shell, and the copper-clad substrates are embedded into the grooves. The leading-in electrode and the leading-out electrode are fixedly connected to the two sides of the copper-clad substrate matrix and connected with the copper-clad substrate and the silicon carbide chip through the bonding copper sheets. And the copper-clad substrates are connected through bonding copper sheets. The heat conductivity can be improved, the packaging process is simplified, and the overall performance is improved.

The application discloses a sawtooth optimization method based on t-distribution cumulative distribution and a disc saw preparation method. The disc saw preparation method is innovative in constructing a sawtooth profile by using a Student-T distribution CDF curve in view of the problems of stress concentration, loud noise and short service life of a traditional sawtooth, and controls tooth profile curvature through a degree of freedom v parameter to realize continuous and smooth transition from a tooth root to a tooth top. The method comprises the following steps: design parameter input, single-tooth reference profile generation, single-tooth profile discretization and coordinate conversion, tooth back and chip space construction, circular array replication, three-dimensional model generation and verification and manufacturing data output, and a tooth profile suitable for different requirements is obtained by adjusting the v value, and an optimal profile disc saw is output, so that the cutting noise of the disc saw is reduced, the tool life is prolonged, and the machining quality and efficiency are significantly improved.

The application discloses a hanging basket motion control method and system based on operation state recognition, and particularly relates to the technical field of bridge construction automation, and is used for solving the problem of poor synchronous control of the hanging basket movement; the application accurately identifies the working condition through multi-source sensing data fusion and a finite state machine, and realizes adaptive setting of a servo system parameter based on working condition parameter mapping; a model prediction control algorithm fusing pose feedback and wind load feedforward is used to generate a disturbance-resistant motion trajectory; walking synchronization and platform stability are realized through cross-coupling control and attitude closed-loop fine adjustment; an independent safety guardian thread provides emergency response, and a double closed loop of control and protection is formed, so that the motion precision, disturbance resistance and intrinsic safety level of the hanging basket under variable load and strong disturbance working conditions are effectively improved, and the energy consumption and mechanical vibration frequency in the motion process of the hanging basket are reduced.

Embodiments of the disclosure relate to a method, a computer program product, and an apparatus for operating a vehicle. The invention relates to a method for operating a vehicle, in particular a motor vehicle, having at least one first and one second actuatable actuator, which influence the yaw behavior of the vehicle when necessary. The method comprises the following steps: determining a driving condition of the vehicle according to a dynamic indicator; dividing a yaw moment required to influence the yaw behavior into at least one first yaw moment for a first actuator and a second yaw moment for a second actuator according to the driving situation; and calculating a first setup specification for the first actuator in order to induce the first yaw moment, and calculating a second setup specification for the second actuator in order to induce the second yaw moment.