Results 281 to 290 of about 11,478,449 (349)

Capturability of Impact-Angle Control Composite Guidance Law Considering Field-of-View Limit

IEEE Transactions on Aerospace and Electronic Systems, 2020
A capture region of the composite guidance law is analyzed for a missile equipped with a strapdown seeker. The composite guidance law consists of a deviated pure pursuit guidance law and a pure proportional navigation guidance law to perform impact-angle
Seokwon Lee, Youdan Kim
semanticscholar   +1 more source

Practical guidance law controlling impact angle

Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering, 2007
Impact angle is defined as the angle between the velocity vectors of a missile and a target at the instance of interception. The objective of the impact angle control guidance (IACG) law is to guide the missile into a collision course with a specified impact angle. In this paper, a new IACG law considering practical implementation is proposed.
K-S Kim, B Jung, Y Kim
openaire   +1 more source

Fractional Guidance Law with Impact Angle Constraint and Seeker’s Look Angle Limits

Unmanned Systems, 2023
In this paper, using fractional mathematics, the guidance law of collision angle control is proposed by simultaneously taking into account the limitation of the seeker’s look angle. In order to apply the limitations of impact angle and launch in the equations of the acceleration command, the movement path from the time of launch to reaching the target
Mohsen Ebrahimi, Saeed Nasrollahi
openaire   +1 more source

Finite-Horizon Robust Suboptimal Control-Based Impact Angle Guidance

IEEE Transactions on Aerospace and Electronic Systems, 2020
This paper presents impact angle guidance based on finite-horizon robust optimal control. This approach, a fusion of newly proposed finite-time state-dependent Riccati equation and integral sliding-mode-control, solves finite-horizon tracking problem for
S. R. Kumar, Arnab Maity
semanticscholar   +1 more source

Polynomial guidance law for impact angle control with a seeker look angle limit

Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering, 2020
In this paper, the impact angle control problem is investigated by applying the polynomial shaping method. By shaping the light-of-sight angle with relative range, a guidance law called range polynomial guidance is proposed, and the coefficients are ...
Z. Zhiming, Xiaoxian Yao
semanticscholar   +1 more source

The Effect of Impact Angle on Knee Tolerance to Rigid Impacts

SAE Technical Paper Series, 2003
While the number of deaths from vehicle accidents is declining, probably because of mandatory seat belt laws and air bags, a high frequency of lower extremity injuries from frontal crashes still occurs. For the years 1979-1995 the National Accident Sampling System (NASS) indicates that knee injuries (AIS 1-4) occur in approximately 10% of cases ...
Eric G, Meyer, Roger C, Haut
openaire   +2 more sources

Ricochet Angle at Hypervelocity Impact

2024 17th Hypervelocity Impact Symposium
Abstract This work presents results of hypervelocity impact experiments, which investigate the relationship between residual velocity and impact velocity as the target obliquity is varied, with the intention to find an obliquity that results in a ricochet. Both experimental and numerical results are presented.
Filip Gökstorp, Olof Andersson, Ulf Gustavsson, Patrik Lundberg   +3 more
openaire   +1 more source

Impacted third molars and risk of angle fracture

International Journal of Oral and Maxillofacial Surgery, 2002
The purpose of this study was to assess the influence of the presence, position, and severity of impaction of the mandibular third molars, on the incidence of mandibular angle fractures. A retrospective cohort study was designed for patients presenting to the Division of Oral and Maxillofacial Surgery, Toronto General Hospital (Toronto, Canada), for ...
T, Meisami, A, Sojat, G K B, Sàndor, H P, Lawrence, C M L, Clokie   +4 more
openaire   +2 more sources

Angle-closure glaucoma: impact, etiology, diagnosis, and treatment

Current Opinion in Ophthalmology, 2003
Recent studies underscore the importance of angle-closure glaucoma (ACG) as a cause of world blindness. A major contribution in assessing the true impact of this disease has been an article estimating the number of persons with occludable angles, angle closure, and blindness from ACG in China as 28.2 million, 9.1 million, and 1.7 million, respectively.
Nathan G, Congdon, David S, Friedman
openaire   +2 more sources

A novel non-singular terminal sliding mode control-based integrated missile guidance and control with impact angle constraint

Aerospace Science and Technology, 2019
A novel impact angle constrained integrated guidance and control (IGC) scheme is proposed with non-singular terminal sliding mode control (NTSMC) technique for missile to intercept a maneuverable target.
Chao Ming, Xiaoming Wang, Ruisheng Sun
semanticscholar   +1 more source