9results about How to "Improve pointing accuracy" patented technology

The invention provides an inertial navigation error correction method and device based on photoelectric equipment image target detection, and belongs to the technical field of photoelectricity, and the method comprises the following steps: obtaining a photoelectric image of a to-be-detected target based on a pre-correction attitude angle of photoelectric equipment; performing target detection on the photoelectric image to obtain a target deviation angle; obtaining a horizontal coordinate system deviation angle based on the target deviation angle and the image rotation angle; obtaining an inertial navigation correction angle of the photoelectric equipment based on the horizontal coordinate system deviation angle and the tracking turntable direction; and performing inertial navigation error correction on the photoelectric equipment based on the inertial navigation correction angle. According to the inertial navigation error correction method and device based on photoelectric equipment image target detection, the inertial navigation error can be effectively reduced, and the pointing precision of photoelectric equipment is improved.

The invention discloses an antenna pointing correction method based on a theoretical trajectory and an improved genetic algorithm, and the method comprises the steps: constructing an antenna pointing error correction model, extracting correction parameters, carrying out the global optimization of the correction parameters through employing the improved genetic algorithm, and taking a residual matrix as a target value, taking error minimization between azimuth angle and pitch angle deviation predicted values output by the antenna pointing error correction model and a theoretical matrix as a fitness function, performing iterative solution through selection, intersection and mutation operation to obtain an optimal correction parameter group, and completing parameter calibration of the antenna pointing error model; the optimized parameters are fed back to the antenna pointing error correction model, and the antenna pointing error is corrected in real time. According to the method, the convergence speed of the algorithm is higher, a better solution can be found in a shorter time, the global search capability is enhanced, the pointing precision of the antenna is improved, and rapid tower-free calibration of the antenna is realized.

The application discloses a kind of virtual reality in cursor adaptive display and control method, it is related to interactive interface cursor adaptive display technical field, solve the technical problem that cursor control accuracy is not high in three-dimensional man-machine interface, visual feedback information is insufficient, its technical scheme main point is based on interactive target prediction technology, the final target control is predicted, and based on this, cursor form control, control pre-naked hand interaction of cursor adaptive display rendering and zoom cursor C / D ratio gain are carried out.Not only the pointing accuracy and efficiency are enhanced, but also the operation of user provides immediate visual feedback, significantly improves the user experience.Meanwhile, the method has high universality, can be well migrated to other three-dimensional man-machine interaction pointing technology.

The invention provides a solar panel driving device control method and device, equipment and a medium. The method comprises the following steps: acquiring a current track illumination state; based on the current track illumination state, corresponding working modes are selected and entered, and the working modes at least comprise a sunshine area working mode and a shadow area working mode; according to the entered working mode, a corresponding driving instruction is generated and output, and the driving instruction is used for controlling movement of a driving mechanism of the solar panel driving device so that the angular acceleration of the driving mechanism can change continuously in the movement process. The scheme is used for solving the problem that the periodic motion of a slip-ring-free swing type SADA in the related technology can influence the attitude stability and the pointing precision of a satellite platform.

This application discloses an automatic calibration method, apparatus, display device, and storage medium. The automatic calibration method obtains a first actual feature value of the current installation position of the transceiver device in the display device, determines target algorithm parameters matching the current installation position based on the first actual feature value and a preset database, and then automatically calibrates the transceiver device according to the target algorithm parameters. The automatic calibration method in this application compares the first actual feature value with multiple standard feature values ​​in the preset database, finds the standard feature value that best matches the current installation position, and loads the preset algorithm parameters corresponding to this standard feature value as the target algorithm parameters. Subsequently, the pointing calculation model can be updated according to the target algorithm parameters to correct angle, distance, and coordinate mapping errors caused by installation position deviations, thereby achieving automatic calibration of the transceiver device and improving pointing accuracy.

The application discloses a self-adaptive sleeve for hydraulic joint installation and an automatic positioning installation method, and relates to the technical field of hydraulic joint installation, in particular to a self-adaptive sleeve for hydraulic joint installation and an automatic positioning installation method. The self-adaptive sleeve for hydraulic joint installation comprises a stepped spring collet seat, the inside of the spring collet seat is sequentially provided with a first stepped square hole, a second stepped square hole, an inner cylindrical hole and an inner tapered hole from top to bottom along the vertical direction; the side length of the first stepped square hole is larger than that of the second stepped square hole, and the diameter of the outer circle of the second stepped square hole is larger than that of the inner cylindrical hole; a gas cylinder is arranged in the second stepped square hole and fixed on the top end face of the inner cylindrical hole; the spring collet is matched with the inner tapered hole of the spring collet seat, the spring collet is pulled upward and shrunk by the gas cylinder, and then the outer hexagonal size of different specifications of hydraulic joints is adapted, so that the auxiliary time caused by frequent replacement of the sleeve is avoided, and the technical problems that the existing automatic assembly unit of the hydraulic valve quick joint is complicated to install and needs manual assistance are solved.

The utility model discloses a foldable laser frame adjusting device which comprises a vertical frame and a transverse frame, the ends of the vertical frame and the transverse frame are connected in a hinged mode, the upper end of the vertical frame is connected with a first U-shaped frame in a hinged mode, a transversely-arranged connecting plate is fixedly connected to the upper portion of the middle of the first U-shaped frame, and a through hole is formed in the outer side of the connecting plate and used for being fixed to the lower end of a top plate anchor rod through a nut. The free end of the transverse frame is hinged to a second U-shaped frame, the middle of the second U-shaped frame is perpendicularly and fixedly connected with a fixing bolt, the fixing bolt is matched with a nut to be fixedly connected with a laser frame, the vertical frame and the transverse frame are each composed of two long-strip-shaped plates which are spaced by a certain distance, through holes are formed in the ends of the long-strip-shaped plates, and hinge shafts with damping are arranged in the through holes. The device is reasonable in design, compact in structure, flexible in adjustment, convenient to use and carry and not prone to damage, the laser frame does not need to be fixed to a certain anchor rod, the angle and the position are convenient to adjust, and the positioning efficiency and precision of the laser frame are improved.

This invention provides a light-transmitting housing for a lidar and the lidar itself. The light-transmitting housing has a rotationally symmetric structure about the lidar's axis of rotation. The inner surface of the housing is parabolic, and its cross-section along the axis of rotation forms a parabola. The outer surface of the housing, on the cross-section along the axis of rotation, is an even-order aspherical shape corresponding to the parabola. The coordinate system used in the equation of the even-order aspherical shape has its z-axis parallel to the axis of rotation, and the planes containing the x-axis and y-axis of the coordinate system are parallel to the lidar scanning plane. The even-order aspherical shape ensures that a light beam emitted from any height parallel to the x-axis within the xz-cross-section along the axis of rotation is emitted parallel to the x-axis. The defocusing position of the lidar's light source ensures that the absolute value of the difference between the first divergence angle and the second divergence angle is less than a preset threshold. This invention solves the problem of beam deflection and divergence affecting beam transmission characteristics, thus improving the overall performance of the lidar.

The present application relates to a kind of space solar panel servo motor system rigid-flexible coupling modal modeling method, belong to spacecraft dynamics modeling technical field.This method aims to solve the failure of existing analytical model under single-axis large angle rotation and the problem that finite element model lacks explicit mathematical equation and is difficult to be directly used for control system design.The technical scheme is:establishing system geometry model and coordinate system;Adopting characteristic orthogonal polynomial to construct solar panel vibration displacement function;System kinetic energy, strain energy and hinge potential energy function are constructed;Based on Rayleigh-Ritz method, the system modal characteristic equation is established and the natural frequency and vibration mode are solved numerically.This method can realize the accurate modeling of single-axis large range rotation, and directly obtain low-dimensional high-precision explicit mathematical model, which is convenient for docking and co-simulation with control software.