7results about How to "High speed accuracy" patented technology

The utility model provides a tractor electro-hydraulic control HST hydraulic system which comprises an oil supplementing pump, a walking pump and a walking motor, and the walking pump and the walking motor are in loop connection through a pipeline. An oil supplementing branch and a control branch are arranged at an outlet of the oil supplementing pump; the oil supplementing branch is connected with a first one-way valve and a second one-way valve through branches, an outlet of the first one-way valve is connected with one end of the walking motor, and an outlet of the second one-way valve is connected with the other end of the walking motor. The control branch is connected with an electromagnetic reversing valve, the electromagnetic reversing valve is connected with a plunger mechanism, and the output end of the plunger mechanism is connected with a control switch of the walking pump. According to the utility model, the oil replenishing pump supplies oil to the control branch, and the electromagnetic directional valve controls the output direction of the oil, so that the output end of the plunger mechanism is controlled to continuously move; the control switch for controlling the walking pump realizes advancing and retreating state control and continuous speed control of the HST system; and the operation convenience is improved.

The invention discloses a state estimation method for multi-mode motion of a wheel-foot robot. The method comprises the steps that joint motor data, wheel type motor data and IMU data are fused based on a Kalman filter to construct a state equation and an observation equation; wherein the observation equation calculates the accurate position and speed of a wheel-ground contact point by introducing a complete kinematics model and a first-order differential kinematics model of the biased / non-biased wheel-foot robot, and calculates the sliding displacement caused by the wheel-type additional degree of freedom by constructing an asymmetric wheel-type sliding motion model; therefore, the influence of the wheel type structure and the wheel type additional degree of freedom on speedometer updating is considered at the same time; and by introducing a reliable contact hypothesis of supporting phase wheels into an observation equation, fuselage height estimation drift is prevented. According to the invention, high-reliability state estimation of the wheel-foot robot can be realized in wheel-type, foot-type, wheel-foot hybrid and other modes, and the problem that the existing body state estimator cannot be suitable for the wheel-foot robot is solved.

The invention provides a transparent material parameter measuring method and a transparent material parameter measuring system, which are used for solving the technical problems of large signal interference, low signal-to-noise ratio and the like of the existing non-contact measuring method. The measuring method comprises the following steps: 1, preparing a sample to be measured; 2, respectively dividing a bullet-facing surface and a non-bullet-facing surface of the to-be-detected sample into film coating areas, reserving a transparent area penetrating through the axial direction of the to-be-detected sample between the two film coating areas, and then respectively coating a layer of metal reflective film in each film coating area; 3, at least one PDV probe is arranged at the position, not affected by the side sparse waves, in the coating area of the non-bullet-facing face, at the position, not affected by the side sparse waves, in the non-coating area of the non-bullet-facing face and one end of the non-bullet-facing face of the transparent area respectively; and 4, impacting the to-be-tested sample from the bullet facing surface along the axial direction through the light-gas gun flat plate impact experiment device, respectively acquiring particle speed signals at corresponding positions and speed signals of the flyer by each PDV probe, and further calculating to obtain the flatness and the wave velocity of the to-be-tested sample.

The invention discloses a blade rotating speed debugging method and system for an automobile engine cylinder cover test, computer equipment and a storage medium. The method comprises the following steps that the blade rotating speed is collected; filtering and averaging the blade rotating speed data to obtain a rotating speed average value; carrying out interval recalibration on the processed rotating speed mean value data; and outputting and displaying the calibrated blade rotating speed. According to the invention, the rotation speed fluctuation in unit time can be reduced, invalid values in the blade rotation speed are filtered out, the rotation speed is calibrated in different intervals, the influence of the blade rotation speed fluctuation on the test result is eliminated to the greatest extent, and the output rotation speed precision is improved, so that the accuracy of the test result is improved.

This application provides a method, system, device, and storage medium for realizing a depth-domain imaging surface. The method includes applying a total correction to preprocessed time-domain data to correct a fixed surface, obtaining a final reference surface; secondly, using the travel time information of the first arrival wave of an earthquake to invert the near-surface velocity structure, extracting the velocity and thickness of the weathering layer from the tomographic static correction, and calculating the time correction. This invention, through time-domain tomographic static correction, corrects the weathering layer data to the water table, effectively avoiding the difficulty of near-surface velocity modeling. It quickly and effectively achieves depth-domain modeling and imaging. By utilizing the concept of time-domain static correction, seismic data is corrected to the water table, thus avoiding near-surface velocity modeling and directly starting mid-to-deep modeling from the water table. This shortens the processing cycle and improves velocity accuracy, which is beneficial for seismic imaging.

The application discloses a kind of methods for laser inertial navigation system accelerometer assembly measurement dynamic error compensation, comprising: design inertial navigation calibration software, accelerometer assembly sensitive axis torsional elastic deformation angle model and measurement dynamic error model are established in software;After inertial navigation static initial alignment process is completed, do linear motion and angular motion coupling motion, collect gyroscope accelerometer calibration data, input inertial navigation calibration software, complete calibration parameter identification including accelerometer assembly dynamic error model parameter;According to accelerometer assembly dynamic error model parameter, dynamic error real-time compensation value is calculated, multiplied by sampling period to obtain dynamic velocity increment error compensation, deducts accelerometer velocity increment dynamic velocity increment error compensation, completes accelerometer measurement dynamic error online compensation.The application designs a kind of accelerometer assembly dynamic error compensation model, realizes laser inertial navigation accelerometer assembly dynamic error high-precision compensation.

The invention discloses a detachable multi-flow-rate passive analgesia pump which comprises a plurality of sets of passive analgesia pump modules which are detachably installed and connected, and liquid medicine of each set of passive analgesia pump module flows out of an output port of an infusion pipeline and then is mixed with liquid medicine in other passive analgesia pump modules through a three-way valve. By pre-storing corresponding drugs, rapid use of opioid, non-steroidal and sedative related drugs can be realized, the configuration process of an analgesia pump is simplified, and the grading analgesia concept is advanced to a wound site.