Topic
Guidance system
About: Guidance system is a research topic. Over the lifetime, 4282 publications have been published within this topic receiving 45964 citations.
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Patent•
06 Dec 1989
TL;DR: In this paper, a wire guidance system for a materials handling vehicle, such as a turret stockpicker, detects an alternating signal carried by a buried wire, and two sets of four sensors each are carried at either end of the vehicle.
Abstract: A wire guidance system for a materials handling vehicle, such as a turret stockpicker, detects an alternating signal carried by a buried wire. Two sets of four sensors each are carried at either end of the vehicle. The distance and angle of the vehicle is determined by reference to the distance measurements of each sensor set, as calculated by a microcomputer. Deviations in the angle or speed from predetermined limits will cause brakes to be applied and require operator intervention before the vehicle can be restarted.
21 citations
Patent•
10 Jul 1975
TL;DR: In this paper, guidance along the runway centerline when visibility conditions do not permit adequate visual cues for manual control is provided utilizing lateral acceleration and bank angle information, and the present system provides the proper command to decrab the aircraft and return the aircraft to the centerline.
Abstract: Guidance along the runway centerline when visibility conditions do not permit adequate visual cues for manual control are provided utilizing lateral acceleration and bank angle information. An aircraft type airborne vehicle can touchdown with a crab angle in the presence of a crosswind and the present system provides the proper command to decrab the aircraft and return the aircraft to the centerline.
21 citations
Patent•
17 Feb 2016
TL;DR: In this article, the authors present a system and a method to guide and manage vehicles in total or partial absence of human intervention, through mobile radio systems appropriately specialized that oversee the operations with some appropriate control and safety features.
Abstract: The present invention relates to a system and a method to guide and manage vehicles. These operations in total or partial absence of human intervention. The system developed through mobile radio systems appropriately specialized that oversee the operations with some appropriate control and safety features.
21 citations
TL;DR: In this article, the application of three-dimensional differential geometric (DG) guidance commands to a realistic missile defense engagement was studied, and an algorithm for the angle-of-attack and the sideslip angle was developed by assuming the guidance curvature command and guidance torsion command equal to its corresponding value of current trajectory.
Abstract: Purpose – To study the application of three‐dimensional differential geometric (DG) guidance commands to a realistic missile defense engagement, and the application of the Newton's iterative algorithm to DG guidance problems.Design/methodology/approach – The classical differential geometry theory is introduced firstly to transform all the variables in DG guidance commands from an arc length system to the time domain. Then, an algorithm for the angle‐of‐attack and the sideslip angle is developed by assuming the guidance curvature command and guidance torsion command equal to its corresponding value of current trajectory. Furthermore, Newton's iteration is utilized to develop iterative solution of the stated algorithm and the two‐dimensional DG guidance system so as to facilitate easy computation of the angle‐of‐attack and the sideslip angle, which are formulated to satisfy the DG guidance law.Findings – DG guidance law is viable and effective in the realistic missile defense engagement, and it is shown to ...
21 citations
01 Jan 2015
TL;DR: In this paper, an integrated navigation and guidance system (NGS) for a small-to-medium-size RPAS is presented, which is based on Global Navigation Satellite System (GNSS), Vision Based Navigation (VBN), and other low-cost avionics sensors.
Abstract: Integrated Navigation and Guidance Systems (NGS) based only on satellite and other lowcost navigation sensors (e.g., Micro-Electro-Mechanical System (MEMS) based inertial sensors) cannot guarantee the Required Navigation Performance (RNP) in all flight phases of Remotely Piloted Aircraft Systems (RPAS). In this paper, a novel NGS for a small-to-medium size RPAS is presented, which is based on Global Navigation Satellite System (GNSS), Vision Based Navigation (VBN) and other low-cost avionics sensors. Additionally, Aircraft Dynamics Model (ADM) is used to compensate for the MEMS based Inertial Measuring Unit (IMU) sensor shortcomings in high-dynamics attitude determination tasks. Two multi-sensor architectures are compared that are based on an Extended Kalman Filter (EKF) and an Unscented Kalman Filter (UKF) approach for data fusion. The ADM measurements are prefiltered by an UKF to increase the ADM attitude solution validity time. The EKF based VBNIMU- GNSS-ADM (E-VIGA) system and the UKF based system (U-VIGA) performances are evaluated in a small RPAS integration scheme (i.e., AEROSONDE RPAS platform) by exploring a representative cross-section of this RPAS operational flight envelope. Additionally, an error covariance analysis is performed on the Aircraft Dynamics Filter (ADF) using Monte Carlo simulation. The position and attitude accuracy comparison shows that the E-VIGA and U-VIGA systems fulfill the relevant RNP criteria, including precision approach down to CAT-II.
21 citations