scholarly journals Research on Command Generation Strategy of Roll and pitch seeker

2021 ◽  
Vol 2085 (1) ◽  
pp. 012017
Author(s):  
Fan Lin ◽  
Xinjie Shen
Keyword(s):  
Tracking Control ◽  
Simple Structure ◽  
Angular Rate ◽  
Field Of View ◽  
Large Field ◽  
Line Of Sight ◽  
Tracking Problem ◽  
Overall Design ◽  
Command Generation ◽  
Simulation Results

Abstract The roll pitch seeker has a large field of view, which can achieve large off-axis angle attacks. At the same time, it has a simple structure and is easy to miniaturize, which is beneficial to the overall design of the missile. However, the over-tracking problem of the rolling seeker restricts her application in engineering. To solve this problem, this paper proposes a method to calculate the roll frame angle by using the angular rate of the projectile line of sight when the pitch frame angle is small. The simulation results show that this method is effective in the overhead tracking control.

Adaptive Tracking Control of Wheeled Mobile Robots

2011 ◽  
Vol 55-57 ◽  
pp. 1195-1199 ◽  
Author(s):  
Min Zuo ◽  
Guang Ping Zeng ◽  
Xu Yan Tu
Keyword(s):  
Mobile Robots ◽  
Tracking Control ◽  
Control Input ◽  
Tracking Problem ◽  
Wheeled Mobile Robots ◽  
Adaptive Tracking Control ◽  
Control Scheme ◽  
Velocity Increments ◽  
Simulation Results ◽  
Adaptive Control Scheme

Trajectory-tracking problem of wheeled mobile robots is investigated. Adaptive control scheme utilized has only one control signal. The control input gives out the velocity increments which will be utilized to adjust the pose of WMR so as to track the desired trajectories. The controller adopted is simple to realize and easy to tune the parameters, which is benefit to real applications. Numerical simulation results show that the control scheme is valid.

Path Loss of Non-Line-of-Sight Single-Scatter Model

2012 ◽  
Vol 571 ◽  
pp. 416-420
Author(s):  
Tai Rong Wang ◽  
Lu Bai ◽  
Zhen Sen Wu
Keyword(s):  
Geometric Parameter ◽  
Path Loss ◽  
Weather Conditions ◽  
Apex Angle ◽  
Field Of View ◽  
Line Of Sight ◽  
Simulation Results ◽  
Single Scatter ◽  
Non Line Of Sight

Based on the single-scatter model of the Non-Line-of-Sight(NLOS), we analyze the effect of the geometric parameter of the transceiver on path loss, such as the receiver field of view(FOV), the transmitter apex angle and so on. And path loss in different visibility and weather conditions are simulated. The simulation results show that increasing the receiver FOV, or reducing the transmitter apex angle or the receiver apex angle can reduce path loss. And visibility and weather have an important effect on path loss.

Numerical analysis of shift error in X-ray phase contrast imaging for large field of view

2017 ◽  
Vol 34 (1) ◽  
pp. 8
Author(s):  
Jianheng Huang ◽  
Yaohu Lei ◽  
Xin Liu ◽  
Jinchuan Guo ◽  
Ji Li ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Phase Contrast ◽  
Field Of View ◽  
Phase Contrast Imaging ◽  
Large Field ◽  
Contrast Imaging ◽  
X Ray

Large Field-of-View Super-Resolution Optical Microscopy Based on Planar Polymer Waveguides

ACS Photonics ◽  
2021 ◽  
Author(s):  
Anders Kokkvoll Engdahl ◽  
Stefan Belle ◽  
Tung-Cheng Wang ◽  
Ralf Hellmann ◽  
Thomas Huser ◽  
...  
Keyword(s):  
Optical Microscopy ◽  
Super Resolution ◽  
Field Of View ◽  
Large Field ◽  
Polymer Waveguides

scholarly journals Stability and Manoeuvrability Simulation of a Semi-Autonomous Submarine Free-Running Model SUBOFF with an Autopilot System

2021 ◽  
Vol 11 (1) ◽  
pp. 410
Author(s):  
Yu-Hsien Lin ◽  
Yu-Ting Lin ◽  
Yen-Jun Chiu
Keyword(s):  
Optimal Control ◽  
Experimental Tests ◽  
Degree Of Freedom ◽  
Line Of Sight ◽  
Pd Controller ◽  
Free Running ◽  
Simulation Results ◽  
Guidance Algorithm ◽  
Logic Operations ◽  
Six Degree Of Freedom

On the basis of a full-appendage DARPA SUBOFF model (DTRC model 5470), a scale (λ = 0.535) semi-autonomous submarine free-running model (SFRM) was designed for testing its manoeuvrability and stability in the constrained water. Prior to the experimental tests of the SFRM, a six-degree-of-freedom (6-DOF) manoeuvre model with an autopilot system was developed by using logic operations in MATLAB. The SFRM’s attitude and its trim polygon were presented by coping with the changes in mass and trimming moment. By adopting a series of manoeuvring tests in empty tanks, the performances of the SFRM were introduced in cases of three sailing speeds. In addition, the PD controller was established by considering the simulation results of these manoeuvring tests. The optimal control gains with respect to each manoeuvring test can be calculated by using the PID tuner in MATLAB. Two sets of control gains derived from the optimal characteristics parameters were compared in order to decide on the most appropriate PD controller with the line-of-sight (LOS) guidance algorithm for the SFRM in the autopilot simulation. Eventually, the simulated trajectories and course angles of the SFRM would be illustrated in the post-processor based on the Cinema 4D modelling.

scholarly journals Attitude determination for nano-satellites – I. Spherical projections for large field of view infrasensors

2021 ◽  
Author(s):  
Kornél Kapás ◽  
Tamás Bozóki ◽  
Gergely Dálya ◽  
János Takátsy ◽  
László Mészáros ◽  
...  
Keyword(s):  
Attitude Determination ◽  
Field Of View ◽  
Large Field
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