53results about How to "Improve dynamic accuracy" patented technology

The invention relates to a device and method for detecting the dynamic properties of a two-dimensional directional mirror. The device comprises a dynamic photoelectric autocollimator, a controller of the dynamic photoelectric autocollimator, a hollow rotary platform, a controller of the hollow rotary platform, a rotary target, an adjustment platform, a data acquiring and processing system and a computer measurement and control system. Under the guidance of the computer measurement and control system, a target simulation reflector on the rotary target is driven by the rotary platform to simulate an optical target in movement, the dynamic photoelectric autocollimator provides the rapid and high-precision angle miss distance for the two-dimensional directional mirror, the data acquiring and processing system feeds back and controls the two-dimensional directional mirror to track the target simulation movement in real time, and the computer measurement and control system processes the measurement data of the photoelectric autocollimator in real time to obtain the data reflecting the dynamic response properties of the two-dimensional directional mirror. The device and method provided by the invention can be used for detection of properties of the two-dimensional directional mirror, such as axis shaking, step response, dynamic continuous tracking and the like.

A gait generating system for a mobile robot has n dynamic models and determines a first gait parameter defining a desired gait such that the boundary condition of a gait on a first dynamic model is satisfied. The first gait parameter is corrected step by step by using an m-th dynamic model (m: integer satisfying 2≦m≦n), which is each dynamic model other than the first dynamic model, and an m-th gait parameter that satisfies the boundary condition on the m-th dynamic model is determined. The m-th gait parameter is determined by correcting an object of an (m−1)th gait parameter to be corrected on the basis of the degree of deviation of the gait generated on the m-th dynamic model by using the (m−1)th gait parameter from the boundary condition. A final determined n-th gait parameter and an n-th dynamic model are used to generate a desired gait.

A method for dynamically balancing the loads in a circuit (1, 4) of semiconductor power switches arranged in series or in parallel is disclosed. Individual switching signals (iG1, iG2) for the semiconductor power switches (S1 . . . S4) are generated by determining a system-widely valid synchronous sampling time (tsj) independently for each semiconductor power switch (S1 . . . S4) due to a synchronous event (es) of the whole circuit (1, 4). Control loop offsets between actual values (ai) measured synchronously at the sampling time (tsj) and given desired values (as) of an asynchronous state variable (a(t)) of the semiconductor power switches (S1 . . . S4) are reduced in the same or in following switching cycles. Alternatively, control loop offsets between actual time values (tai) and desired time values (tas) are minimized, wherein the actual time values (tai) are measured upon exceeding a globally provided threshold value (epsilona) of an asynchronous state variable (a(t)) of the semiconductor power switches (S1 . . . S4). Embodiments relate to: Offsetting the sampling time (tsj) in time by a globally provided time interval (Deltat0), providing desired values locally or globally, e.g. by averaging of actual values (ai, tai), additional balancing of the gradients of asynchronous time variables (a(t)). A central sampling command can be dispensed with and the switching synchronicity is improved, switching times are shortened and dynamic switching losses are reduced.

The invention belongs to the technical field of transfer alignment in inertial navigation, and particularly relates to a method for measuring hull deformation angle based on inertia instruments, such as a gyroscope, an accelerometer and the like, and an iterative filtering algorithm. The method comprises the following steps: 1, evaluating an estimated value (FORMULA) of the deformation angle by utilizing a Kalman filtering method; 2, analyzing the power spectrum of an angular velocity observation residual; 3, using the angular velocity observation residual and a specific force observation residual as Kalman filtering observation variables for iterative filtering; 4, through calculation repetition of the second step and the third step, constantly correcting an estimated result in the first step till a corrected value (FORMULA) of the deformation angle is close to but not equal to a true value (FORMULA). By the method, in allusion to the environmental characteristics that a large ship is low in speed and swings weakly, the measurement accuracy of the deformation angle in a vertical direction can be significantly improved; meanwhile, the method is relatively small in calculation amount, and is suitable for online real-time measurement.

In the invention, a blast-furnace gas pressure-control valve, a blast-furnace gas pressure sensor, a blast-furnace gas flow sensor and a blast-furnace gas flow-control valve are mounted on the blast-furnace gas input conduit; on the coke-oven gas input conduit are disposed a coke-oven gas flow sensor and a coke-oven gas flow-control valve and on the mixed gas output conduit are mounted a mixed gas heat valve sensor and a mixed gas pressure sensor. In addition, a computer control device has an electric connection with the pressure-control valve, the pressure sensor, the flow sensor and flow-control valve of the blast-furnace gas, the flow sensor and flow-control valve of the coke-oven gas and the heat value sensor and the pressure sensor of the mixed gas.

To generate a desired gait of a robot 1 such that a permissible range of a predetermined component (a translational floor reaction force horizontal component or the like) of a floor reaction force acting on the mobile robot 1, a gait generating system for a mobile robot creates a provisional motion, which indicates a provisional value of a desired motion, and repeats processing for correcting the provisional motion by using a first dynamic model and a second dynamic model having a dynamic accuracy that is higher than that of the first dynamic model until a predetermined condition is satisfied, thereby obtaining a final corrected motion as the desired motion. Relative to the provisional motion and a corrected motion at each correction, a difference between a predetermined component of a floor reaction force produced on the second dynamic model and a predetermined component of a floor reaction force produced on the first dynamic model is determined as a floor reaction force error, and a change amount of the error at each correction is also determined. A corrected motion when the change amount has converged to zero is determined as the desired motion.

A method of defining an instantaneous value of a current (i2e) of a pulse-controlled inductive load when the impedance of the load is known, the method comprising the steps of: measuring the output voltage (u1) of a pulsed voltage source, and measuring the output current (i1) of the pulsed voltage source. The method is characterized by further comprising the steps of: low-pass filtering the measured output current (i1) of the pulsed voltage source to produce a fundamental wave current (i1lp), defining a load current estimate (i2est) by computation on the basis of the measured output voltage (u1) of the pulsed voltage source and the impedance of the load, high-pass filtering the load current estimate (i2est), and defining the instantaneous value of the load current (i2e) by adding the high-pass-filtered load current estimate (i2hp) to the fundamental wave current (i1p).

The invention relates to a mixer for mixing rubber and plastic particles, which comprises a mixing roller device and a transmission device which are matched with each other. Both the mixing roller device and the transmission device are arranged on a weighing device which is arranged on a support base. The weighing device, the mixing roller device and the transmission device are respectively connected with a control system which is arranged on one side of the support base through circuits. The mixing roller device is driven by a driving wheel through a rolling ring to rotate. The roller has positive rotation and reverse rotation. During positive rotation, an inner spiral pushing auger drives material particles in the roller to lift, rotate, roll and move tangentially and axially along the roller to uniformly mix the materials. Meanwhile, the materials move to the side of a discharge outlet axially under the action of a spiral thrusting force, and the materials are discharged from the discharge outlet through a material lifting plate finally. The mixer for mixing the rubber and plastic particles has the characteristics of high production efficiency, excellent mixing effect, high discharge speed, adjustable speed, accurate discharge, capacity of preventing the material particles from re-bonding, full-automatic control, full closeness, no dust or noise pollution, and the like.

The present disclosure provides a localization method as well as a helmet and a computer readable storage medium using the same. The method includes: extracting first feature points from a target image; obtaining inertial information of the carrier, and screening the first feature points based on the inertial information to obtain second feature points; triangulating the second feature points of the target image to generate corresponding initial three-dimensional map points, if the target image is a key frame image; performing a localization error loopback calibration on the initial three-dimensional map points according to at least a predetermined constraint condition to obtain target three-dimensional map points; and determining a positional point of the specific carrier according to the target three-dimensional map points. In this manner, the accuracy of the localization of a dynamic object such as a person when moving can be improved.

The invention discloses a position and speed measuring device based on an inductosyn or a rotary transformer. The device adopts a phase discrimination type processing method and comprises an exciting circuit, an inductosyn or a rotary transformer, a signal processing circuit and a central processing unit. An exciting signal is generated by the exciting circuit and subject to power amplification, a power signal passes through the inductosyn or the rotary transformer, the signal processing circuit carries out filtering, amplification, phase shift and reshaping on the power signal, and then the processed signal is sent to the central processing unit. The central processing unit obtains position information through the phase information of a signal, obtains speed information through a position information difference, obtains acceleration information through a speed information difference, and carries out dynamic error correction on phase or speed according to speed and acceleration information. The invention is simple to realize, has low cost and high accuracy, is suitable for both a high-speed operation condition and a low-speed operation condition, and can be applied to the fields of aerospace, military, industry and the like to realize dynamic position and speed measurement.

The invention discloses an overshoot compensation control method and an overshoot compensation control system for material in a mixing plant. The overshoot compensation control method comprises the following step: pre-establishing a material flow coefficient K1, a material gate operating speed K2 and a corresponding relation table for overshoot values; selecting an overshoot value of the current state from the corresponding relation table by detecting a material flow coefficient K1 when the weighing of the material is about to finish and a material gate operating speed K2 when the material gate is closed, and according to a material flow coefficient K1 and a material gate operating speed K2 corresponding to the current time; and setting the overshoot value as the compensation value for calculating weighing hopper and material weight. According to the method, the material flow condition and the material gate operating speed can be detected promptly; and a proper overshoot value is selected from the corresponding relation table according to real situation to serve as the compensation value of the current overshoot value. The method provided by the invention has the advantage that the material weighing dynamic accuracy is improved to a great extent, so as to improve batching accuracy and product quality.

The invention discloses an intelligent high-speed drilling and tapping center machine tool. The machine tool comprises a machine tool body, a stand column, a sliding base, a spindle box, a workbench and other basic parts, wherein the machine tool body is connected to the stand column through screws, the sliding base is connected to the machine tool body through a sliding block on the machine toolbody with screws, and the spindle box is connected to the stand column through a sliding block by means of screws. The machine tool has the advantages that a stand column structure adopts an inverted-L-shaped structure, a column base adopts an inverted-U-shaped structure, and therefore the rigidity and the stability of connection with the machine tool body can be enhanced; and the machine tool stability and the machine tool assembly efficiency can be improved, the high rigidity and the high efficiency of the machine tool improve the cutting performance of a spindle, and meanwhile, the problemsof the resonance phenomenon and the machine tool precision when a workpiece is machined by the machine tool can be solved.