11results about How to "High stability and precision" patented technology

The embodiment of the invention provides a method for suppressing vibration disturbance of a photoelectric pod infrared assembly refrigerating machine, and relates to the technical field of automatic control, and the method comprises the steps: S1, estimating the current vibration frequency of the refrigerating machine; s2, selecting a band-pass filter according to the current vibration frequency of the refrigerator; s3, calculating a disturbance torque estimation value of the refrigerator on the platform according to the gyro angular velocity component after band-pass filtering; and S4, calculating a feedforward control quantity according to the obtained disturbance torque estimated value, and superposing the calculated feedforward control quantity on a feedback control quantity of the photoelectric pod stabilized platform. According to the method, the disturbance torque of the refrigerator to the platform can be estimated, and the influence of the vibration disturbance torque of the infrared refrigerator assembly is counteracted before the disturbance torque does not influence the stability of the platform. The method does not need to increase the cost and complexity of the system, and can be directly integrated into a stability control algorithm of the photoelectric pod, thereby greatly reducing the influence on a stable platform when the infrared refrigerator works, and obviously improving the stability precision of the photoelectric pod.

The invention discloses a ship / vehicle-mounted photoelectric universal high-precision servo control system and method, and relates to the technical field of photoelectric system control, and the system comprises a comprehensive control module, a shafting control module, a sensing module, an angle measurement unit, an image processing unit, a servo driving unit, a fiber-optic gyroscope, a power supply module and a man-machine interaction module. The sensing module is used for carrying out information collection on a target and obtaining a target video signal. According to the method, the gyro integral is used as a double-loop control mode of a position closed loop and a gyro speed closed loop, and a simplified linear state observer is added, so that the anti-disturbance performance and the response speed of the photoelectric equipment are improved, the stability precision and the tracking precision of the photoelectric equipment are improved, and through a calibration method, the stability and the tracking precision of the photoelectric equipment are improved. The time delay between the deviation value of the image plate and the speed value of the gyroscope is accurately measured, the time consistency of information required by target tracking is ensured, and the stability and the tracking precision of the system are greatly improved.

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 invention provides a quartz flexible accelerometer torquer stator assembly magnetic measurement clamp and a magnetic measurement method, and solves various influences caused by taking open-circuit flux density of a center point of a torquer as a torquer stator assembly selection basis in the prior art. According to the invention, the characteristic that a Hall chip is sensitive to a magnetic field and can be converted into magnetic induction intensity is utilized, and the characteristic of an inner cavity structure of a torquer stator assembly of a quartz flexible accelerometer is combined, so that a magnetic measurement clamp capable of carrying out a multi-point closed flux density test at a working air gap between a torquer stator and magnetic steel is designed; the step core shaft on the magnetic measurement clamp can be perfectly and adaptively inserted into the working air gap, so that the Hall chip embedded on the step core shaft is located in the working air gap, and the conversion from the open-circuit magnetic flux density test of the end face of the magnetic steel assembly to the closed magnetic flux density test of the working air gap is realized.

The invention discloses a layered servo control method for a traveling tracked vehicle. A layered control framework is divided into a planning layer and a control layer; the planning layer receives the target position and speed and the current position and speed of the artillery through a dynamic planning model, plans a group of artillery position and speed sequences with shortest time consumption by taking the speed and acceleration of the artillery as constraints, and outputs the artillery position and speed sequences to the control layer; and the control layer receives the artillery position, the speed sequence and the design control law output by the planning layer through a model prediction controller, outputs a voltage control signal to a servo control system of the tracked vehicle, obtains a prediction error through feedback control, and obtains the voltage control signal through rolling optimization. According to the method, the servo system of the tracked vehicle during running is controlled by utilizing a dynamic planning algorithm and model prediction control, a planning layer provides a good signal for a control layer in hierarchical control, the control layer and the planning layer form a virtual closed loop, planning of the planning layer is influenced, a good control effect on the servo system of the tracked vehicle is achieved, and the control efficiency of the tracked vehicle is improved. And the convergence speed and the stability precision of the servo system are improved to a certain extent.

The invention relates to a common-aperture optical system supporting independent adjustment of a television infrared field of view, which comprises a small field of view light window, a common-aperture telescopic system, a fast scanning reflector, a field of view switching mirror group, a thermal infrared imager, a television camera, a large field of view light window and a large field of view turning mirror, the field-of-view switching mirror group comprises a first television infrared spectroscope, a second television infrared spectroscope and a television infrared reflector, four light transmission states appear through switching of the field-of-view switching mirror group, and the first television infrared spectroscope is provided with a light splitting film which allows infrared light to pass through and reflects television light; the second television infrared spectroscope is provided with a light splitting film which allows television light to pass through and reflects infrared light, the television infrared reflector is provided with a reflecting film which reflects the television light and the infrared light at the same time, and the double-view-field independent adjustment device has the advantages of being capable of achieving independent adjustment of large and small infrared view fields of a television, simple in structure and convenient to operate.

The present invention provides a charge pump voltage stabilization circuit, comprising: an oscillation frequency providing circuit for providing several oscillation frequencies; a Mux circuit for receiving several oscillation frequencies and a control signal, selecting the corresponding oscillation frequency as a driving clock frequency according to the value of the control signal, and outputting the driving clock frequency, wherein the oscillation frequency corresponds to the value of the control signal one by one; a charge pump for boosting the input voltage to a corresponding value according to the driving clock frequency, and outputting the voltage; a voltage divider circuit for dividing the output voltage of the charge pump to obtain several charge pump divided voltages; a comparison circuit for comparing several charge pump divided voltages with a reference voltage respectively to obtain several comparison values, and using the comparison values ​​as the control signal of the Mux circuit. The present invention reduces the ripple of the charge pump output voltage and improves the stability accuracy of the charge pump output voltage.

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.

The present invention discloses a novel mounting device for improving the shooting accuracy of a certain type of heavy machine gun, comprising a bracket; a slide assembly, which is arranged on one side of the bracket and is slidably connected to the bracket and is used to install the certain type of heavy machine gun; a right mounting fixed support plate and a left mounting fixed support plate, which are detachably mounted on the bracket and are respectively located on both sides of the certain type of heavy machine gun; a buffer, which is arranged on the right mounting fixed support plate and the left mounting fixed support plate and is connected to the slide assembly; the overall layout design is optimized, the modular design is compact in structure, and a variety of structures are designed to improve the shooting accuracy. The device has a remote control operation function, and the operator can control the machine gun in the vehicle body; manual-automatic first-shot loading and manual-automatic integrated electric firing are realized, single-shot and continuous-shot shooting and control are realized, and a novel mounting device that combines electromechanical and control, has a high degree of automation, high shooting accuracy, and high reliability is realized under the condition of limited space.