4 results about "Rotation velocity" patented technology

The application provides an image acquisition method and device, a terminal device and a computer readable storage medium. The method comprises: acquiring a speed deviation of a second carrier, the speed deviation being an angular velocity of the second carrier relative to a rotating object; determining a target angular velocity of a first carrier according to the speed deviation and a preset initial motion speed of the second carrier; adjusting a current angular velocity of the first carrier to the target angular velocity, and controlling an image sensor to acquire an image of the rotating object. The image acquisition method provided by the application can acquire the speed deviation of the second carrier carrying the first carrier, thereby adjusting the rotating speed of the first carrier, so that the image sensor carried on the first carrier can work at a stable rotating speed, and the quality of the acquired image is improved.

The application discloses a level environment self-adaptive error compensation algorithm method and device, belongs to the technical field of surveying and mapping services; for solving the problem of measurement jump, lag and overshoot caused by coupling of rotation speed change and angle switching under dynamic working condition. The method comprises the following steps: collecting angular velocity and angle switching data in real time; preprocessing and extracting speed change trend and switching time sequence; constructing a segmented adjustable response characteristic mapping based on double driving variables; combining historical deviation distribution and deviation mode characteristics to correct and fuse the initial compensation value; confirming the effectiveness of the compensation parameters through simulation verification; generating compensation instructions synchronized with the response of intelligent sensors by using time alignment mechanism; finally realizing closed-loop parameter updating based on feedback. The application adaptively adjusts the compensation parameters by sensing the speed change and switching action, significantly improving the measurement continuity, stability and overall accuracy of the level in the dynamic environment.

Method for estimating angular errors of coders in a looped system including a rotating actuator, an angle coder producing a position measurements, and a calculation device controlling the actuator, said device receiving a setpoint signal and the position measurements, for looping, and calculating in a corrector a control signal. In a test phase, a specific corrector Cω<sub2>rj< / sub2>(q) is synthesised for a constant rotation speed ωrj, the corrector having zero gain at the corresponding frequency and harmonics, resulting in opening the loop, a matrix relation is established between position measurements and a function of parameters characterizing coder errors and torque ripples, the test phase repeats with different rotation speeds, the matrix relations are concatenated producing an identifiable global matrix relation, the parameters are estimated by resolution of the global matrix relation.

The application discloses a kind of tropical cyclone evolution whole process three-dimensional wind field wind tunnel simulation device, system and method, the simulation device of the present application, the rotation angle and rotation speed of transverse blade structure are adjusted by driving mechanism, can make air flow after the flow guide of flow guide structure form the wind speed profile in line with the characteristics of tropical cyclone field;The guide angle of vertical blade structure at different heights is adjusted by driving mechanism, and the average wind profile in the wind tunnel and the twist of air flow direction can be changed.The simulation device and simulation system of the present application can realize various wind tunnel effects, including making guide angle change with height as exponential function law, making wind speed twist angle reach maximum on ground, etc., and it is convenient and fast to operate, can effectively improve experimental efficiency, simultaneously has the advantages of low implementation cost, strong use flexibility, high space utilization.