Photoelectric detection technology of laser seeker signals

Zhu, L. Y.; Jia, Fangxiu; Jiang, Xiaodong; Li, Xing-Long

doi:10.21629/jsee.2019.06.02

Cited by 7 publications

(4 citation statements)

References 1 publication

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“…Related to other types, such as radio frequency (RF) seekers, laser seekers are featured with high guidance accuracy, strong anti-jamming ability, simple structure and low cost 1 . In laser homing guided weapons, laser seekers are usually referred to as semi-active systems, because the transmitter (laser target designator) is not co-located with the seeker 2,3 . The main functions to be carried out by laser seeker in guidance loop are detection, acquisition and tracking of designated target, signal processing and computation of error signals, necessary for guidance computer.…”

Section: Introductionmentioning

confidence: 99%

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Nonlinear Extended State Observer based Active Disturbance Rejection Control of a Laser Seeker System

et al. 2021

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In this paper, the laser seeker control problem is solved in the framework of active disturbance rejection control (ADRC). The considered problem, which consists of laser seeker stabilisation and target tracking, is expressed here as a regulation problem. A nonlinear extended state observer (NESO) with varying gains is used to improve the performance of linear ESO (LESO), and thus enable better control performance in both transient period and steady-state, with lower control effort. Based on a detailed analysis of system disturbances, a special ADRC tuning method is proposed. The stability of the overall control structure is analysed with a description function method. Through comparative simulations LESO-based and the introduced NESO-based ADRC for the laser seeker system, the advantages of the proposed scheme are shown.

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Section: Introductionmentioning

confidence: 99%

“…The displacement signals contain information about the target line of sight (LOS) angular positions in the seeker field of view (FOV) 2,4 . Based on these signals, the stabilisation platform directs the seeker (with two servo systems) to align its optical axis and target LOS.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Extended State Observer based Active Disturbance Rejection Control of a Laser Seeker System

et al. 2021

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“…Different from laser seekers [1,2] or imaging seekers (including television seekers [3] and infrared seekers [4,5]), the radar seeker is an active homing guidance sensor. It steers itself onto the target by sensing radar cross scatterings [6,7] and realize "fire and forget" [8] for the missile, which greatly enhances the safety of the launching platforms and the aviators.…”

Section: Introductionmentioning

confidence: 99%

Achieving Millimetre Wave Seeker Performance Evaluation Based on the Real-Time Kinematic

Chen

Liu

et al. 2020

Journal of Sensors

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The millimetre wave (MMW) seeker can realize target detection under all weather conditions, the performance of which directly determines the design of the control algorithms. To guarantee the hitting accuracy and damaging effect of the expensive MMW guidance missile, assessing the performance of the seeker is indispensable before the launching of the missile. Real tactical environment of the seeker cannot be simulated comprehensively by indoor laboratories, and high-precision evaluation method outdoor is desperately needed. Focusing on the problem, a method for outdoor MMW seeker performance evaluation is proposed via the real-time kinematic (RTK) technology in this paper, which has the advantages of high-precision orientation and working ability under all climates. Firstly, the geometry of the seeker performance evaluation system is constructed, guaranteeing the effective working of the RTK. And then, the key parameters associated with the guidance control are calculated on the basis of the global position system (GPS) measurements. Finally, comparisons are made between the parameters obtained based on the RTK and the seeker outputs. Besides, for the performance assessment of the MMW seeker towards moving targets, a time synchronization method for different GPS carrier platforms is presented. The effectiveness of the proposed method is validated by the mooring test-fly experiments. Experimental results demonstrate that the performance of the MMW seeker can be evaluated effectively by using the proposed RTK-based method.

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“…Figure 2(b) shows the geometric relationship of the sixscreen intersection test system. Here, M 1 -M 6 are six unit photoelectric detection screens; refer to[15] and[16] for the detection principle of photoelectric detection screen. In the Figure2(b), M 1 and M 4 are detection screens, which are perpendicular to the horizontal plane and parallel to each other, and the distance between them is S; the horizontal straight-line distance between target projection to ground and M 4 is L; the vertical distance between the target and the ground is H , the intersection angle between M 1 and M 3 , M 4 , and M 6 are both α, the intersection angle between M 2 and M 1 , M 4 and M 5 are both β; also, M 2 and M 5 are perpendicular to the plane xoz.…”

mentioning

confidence: 99%

Model Optimization and Calculation Method of Multi-Target Curved Motion Parameters Measurement Using Multi-Screen Intersection Test Mechanism

Zhang

et al. 2020

IEEE Access

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The parameters calculation model of a six-screen intersection with linear motion is used to test the projectile explosion location parameter under the condition of long-range artillery firing, which brings a significant test error, the main reason for the error is that the projectile has its own gravity during the flight, it makes the flight path of the projectile is a curved trajectory. To improve the test accuracy, this paper uses the projectile particle motion equation and six-screen intersection geometry relationship and considers the impact of the projectile's gravity acceleration and air resistance; it studies a calculation model and method of relative location for projectile proximity explosion under the spatial projectile curved motion. Then, it analyzes the error reason for calculating relative coordinate of projectile passing through the detection screen interval by using six-screen intersection test method based on linear motion. By introducing the gravitational acceleration and air resistance during the projectile flight process, establishes the variable trajectory parameters calculation model for a projectile with the curved motion passing through a six-screen intersection test system. Through the high-altitude projectile proximity explosion location test, this paper uses the method of the ballistic lateral camera to obtain the experimental data of projectile explosion location parameter. It compares the experimental data by using the six-screen intersection test method with linear motion and curved motion. The results show that the calculation model based on the curved motion model is closer to actual coordinate data of the projectile proximity explosion location.

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Photoelectric detection technology of laser seeker signals

Cited by 7 publications

References 1 publication

Nonlinear Extended State Observer based Active Disturbance Rejection Control of a Laser Seeker System

Nonlinear Extended State Observer based Active Disturbance Rejection Control of a Laser Seeker System

Achieving Millimetre Wave Seeker Performance Evaluation Based on the Real-Time Kinematic

Model Optimization and Calculation Method of Multi-Target Curved Motion Parameters Measurement Using Multi-Screen Intersection Test Mechanism

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