Dual axis solar angle tracking system without any sensor

In this paper, we determine an optimal range for angle tracking radars (ATRs) based on evaluating the standard deviation of all kinds of errors in a tracking system. In the past, this optimal range has often been computed by the simulation of the total error components; however, we are going to introduce a closed form for this computation which allows us to obtain the optimal range directly. Thus, for this purpose, we firstly solve an optimization problem to achieve the closed form of the optimal range (Ropt.) and then, we compute it by doing a simple simulation. The results show that both theoretical and simulation-based computations are similar to each other.

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The application of CCD frame-transfer sensor to the performance test of angle tracking system of radar

International Conference on Optoelectronic Science and Engineering '90 ◽

10.1117/12.2294675 ◽

1990 ◽

Author(s):

Gangqiang Huang

Keyword(s):

Performance Test ◽

Tracking System ◽

Angle Tracking

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Radar angle-tracking system for multiple moving targets

IEE Proceedings - Radar Sonar and Navigation ◽

10.1049/ip-rsn:20020223 ◽

2002 ◽

Vol 149 (1) ◽

pp. 23 ◽

Cited By ~ 7

Author(s):

H. Gu

Keyword(s):

Tracking System ◽

Moving Targets ◽

Multiple Moving Targets ◽

Angle Tracking

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HIGH RESOLUTION MONOPULSE RADAR TRACKING SYSTEM

Journal of Circuits System and Computers ◽

10.1142/s0218126692000192 ◽

1992 ◽

Vol 02 (04) ◽

pp. 305-321

Author(s):

Y.A. ALSAKA ◽

L.A. YOUNG ◽

M. HAMID

Keyword(s):

High Resolution ◽

Cross Sections ◽

Tracking System ◽

Error Function ◽

Geometric Center ◽

Radar Cross Sections ◽

High Resolution Radar ◽

Angle Tracking ◽

Crosscorrelation Function ◽

Frequency Pulse

High resolution radar techniques are applied to the problem of resolving a multiple target array and locating its geometric center without the usual biasing toward the brightest scatterer. This result is accomplished using monopulse radar techniques combined with high resolution stepped frequency pulse train signal processing in an angle tracking noncoherent high resolution radar. The center of each uniquely separated pair of point targets is calculated by examining the crosscorrelation function of the sum and difference channels. The autocorrelation of the sum channel is used to normalize the crosscorrelation data thereby eliminating the effects of the different targets’ radar cross sections (RCS). The zero separation term of the error function (dc term) remains biased toward the bigger scatterer, even after normalization. The nonzero terms (ac terms) are the cross range distances from the antenna’s boresight to each scatterer and are independent of their RCS. By simply dropping the zero separation term and averaging the remaining terms together, the aimpoint becomes the unbiased geometric center of the array.

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Modeling and Simulation for the Investigation of Radar Responses to Electronic Attacks in Electronic Warfare Environments

Security and Communication Networks ◽

10.1155/2018/3580536 ◽

2018 ◽

Vol 2018 ◽

pp. 1-13 ◽

Cited By ~ 3

Author(s):

So Ryoung Park ◽

Ilku Nam ◽

Sanguk Noh

Keyword(s):

Electromagnetic Wave Propagation ◽

Tracking System ◽

Characteristic Parameters ◽

Tracking Errors ◽

Electronic Warfare ◽

Input Section ◽

Simulation Scenario ◽

Deceptive Jamming ◽

Set Up ◽

Angle Tracking

An electronic warfare (EW) simulator is presented to investigate and evaluate the tracking performance of radar system under the electronic attack situations. The EW simulator has the input section in which the characteristic parameters of radar threat, radar warning receiver, jammer, electromagnetic wave propagation, and simulation scenario can be set up. During the process of simulation, the simulator displays the situations of simulation such as the received signal and its spectrum, radar scope, and angle tracking scope and also calculates the transient and root-mean-squared tracking errors of the range and angle tracking system of radar. Using the proposed EW simulator, we analyze the effect of concealment according to the noise and signal powers under the noise jamming and also analyze the effect of deception by calculating errors between the desired value and the estimated one under the deceptive jamming. Furthermore, the proposed EW simulator can be used to figure out the feature of radar threats based on the information collected from the EW receiver and also used to carry out the electronic attacks efficiently in electronic warfare.

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Robust command filtered control for course tracking of ships under actuator dynamics with input magnitude and rate saturation

Proceedings of the Institution of Mechanical Engineers Part M Journal of Engineering for the Maritime Environment ◽

10.1177/14750902211052221 ◽

2021 ◽

pp. 147509022110522

Author(s):

Qijia Yao

Keyword(s):

Control Strategy ◽

Disturbance Observer ◽

Closed Loop ◽

Tracking System ◽

Tracking Error ◽

Small Region ◽

Great Difficulty ◽

Environmental Disturbances ◽

Actuator Dynamics ◽

Angle Tracking

This article investigates the course tracking of ships subject to parametric uncertainties and environmental disturbances. Particularly, the actuator dynamics with input magnitude and rate saturation is also considered. When including the actuator dynamics, the ship course tracking system becomes a mismatching system, which brings a great difficulty to the control design. A novel robust command filtered control strategy is presented by incorporating a disturbance observer and an auxiliary anti-saturation system into the command filtered backstepping control architecture. The disturbance observer is designed to compensate for the mismatched lumped disturbance. The auxiliary anti-saturation system is introduced to tackle the effects of input magnitude and rate saturation. It is strictly proved that all the closed-loop error signals under the proposed controller are uniformly ultimately bounded and the course angle tracking error can converge to the adjustable small region around the origin. Moreover, the proposed controller is computationally simple and has the strong robustness against uncertainties and disturbances. The effectiveness and advantages of the proposed control strategy are verified through simulations and comparisons.

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