4results about How to "High stability and precision" patented technology

The invention discloses a photoelectric turret visual axis stability control method based on self-adaptive disturbance prediction compensation and a computer product, and the method comprises the following steps: S1, establishing a gyro speed loop discrete model, calculating the deviation between the output of the model and the angular velocity of a visual axis measured by a gyro, and obtaining a disturbance estimation value through an inverse model and a low-pass filter; s2, constructing a mathematical model of disturbance based on a recursive least square method, and performing multi-step forward prediction on equivalent disturbance by using the model; and S3, carrying out weighted fusion on the predicted equivalent disturbance and the real-time disturbance estimation value, and finally feeding a fused compensation signal forward to the input end of the control system to counteract the influence of the actual disturbance on the system. According to the method, real-time estimation and dynamic prediction are fused, the learning-prediction capacity is added on the basis of perception-compensation of a traditional DOB, the method is suitable for a photoelectric turret control system which is remarkable in periodic disturbance or sensitive to delay, phase lag of the traditional DOB is reduced, and the stable control bandwidth and disturbance rejection capacity of a visual axis are greatly improved.

The present application relates to airborne photoelectric equipment technical field, the present application provides a kind of sensor visual axis sight line and three-axis gyro axis system calibration method and device, device includes: three-axis turntable, sensor group, three-axis gyro group, collimator and total station, three-axis turntable is equipped with outer ring, middle ring and inner ring, sensor group is installed on the inner ring base panel of three-axis turntable, wherein, sensor group is equipped with imaging channel;Three-axis gyro group is located on sensor group;Collimator is located in the imaging channel front of sensor group, total station is located between three-axis turntable and collimator.The present application can be according to the result of calibration correction three-axis gyro group output rate data, to improve the measurement accuracy of sensor visual axis sight line space rate, to improve airborne photoelectric equipment stability precision, can be widely applied to various high-precision stable platform, wide application range, with certain application and popularization value.

This utility model relates to a novel air-bearing vibration-damping reaction flywheel, belonging to the field of spacecraft attitude control technology. It includes a flywheel body, an air-bearing base, baffles, and springs. The air-bearing base includes a base and an air vent cover. Mounting holes are provided at the four corners of the base. An inflation groove is provided on the top of the base. The opening of the inflation groove is sealed with the air vent cover. The surface of the air vent cover has densely packed ventilation holes, which communicate with the inflation groove. Side holes communicating with the inflation groove are provided on the side of the base. The baffle has an L-shaped cross-section. One baffle is vertically connected to each of the four sides of the base. Multiple springs are spaced apart below the upper end of the baffle. Fastening edges extending outwards are provided at the four sides of the bottom of the flywheel body. The flywheel body is positioned on top of the air vent cover, and the other end of each spring is pressed against the fastening edge.

The application relates to the technical field of laser beam stabilization control, and discloses a double fast mirror beam pointing stabilization system and method based on matrix decoupling, wherein a main control module sequentially scans four piezoelectric drive channels to obtain a driving voltage variation, receives a first light spot position, generates a coupling matrix based on the driving voltage variation and the first light spot position, and calculates a decoupling matrix; a light spot detection module collects a second light spot position; the main control module constructs an error vector based on the second light spot position and calculates a control correction amount, maps the control correction amount into a four-way piezoelectric driving voltage increment by using the decoupling matrix, and obtains a target four-way piezoelectric driving voltage; a driving output module performs output processing on the target four-way piezoelectric driving voltage, and outputs the target four-way piezoelectric driving voltage to a double fast mirror execution module to drive the double fast mirror to deflect; and the main control module controls the light spot detection module to perform a next closed-loop control cycle. Through the calibration-decoupling-closed-loop control architecture, the application reduces control crosstalk caused by multi-channel coupling of the double fast mirror, and improves the beam pointing stabilization precision.