Near Optimal Explicit Guidance Law with Impact Angle Constraints for a Hypersonic Re-entry Vehicle
Journal Title: INCAS BULLETIN - Year 2018, Vol 10, Issue 2
Abstract
Two guidance laws are discussed in this paper. The first one is the Vector guidance law. This guidance law when equipped with the appropriate gains has the capability to hit a target at the desired impact angle. A parametric method to find the optimal gains of this guidance law which will maximize the impact velocity and keep the miss distance and impact angle errors within bounds is developed in this research. Further, it is seen that the separation in the upper and lower bounds increases with increase in one of the gain values. Also, it is found that, only one of the gain values is independent and that the other dependent gain value is related through a simple straight-line expression. Next guidance law to be discussed is the Diveline guidance law. This law uses multiple divelines to hit a target at the desired impact angle. In the present research, the capability of this Diveline guidance law using a single diveline is analyzed. A method to derive the Diveline guidance law from the Vector guidance law is given in this study. The miss distance and impact angle errors evolving because of reducing the maximum acceleration limit is studied using simulations. Finally, three methods to increase the capture region (i.e. bounds on the set of initial states to achieve zero errors) of a guidance law is discussed.
Authors and Affiliations
Kalirajan KARTHIKEYAN, Joshi ASHOK
Keywords
Related Articles
- EP ID EP296924
- DOI 10.13111/2066-8201.2018.10.2.5
- Views 84
- Downloads 0
Analysis of the resistance to motion in the passenger trains hauled by the locomotive LE 060 EA 5100kW
Two distinct situations were analysed in order to achieve the study: a train consisting of a locomotive LE 060 EA 5100 kW and single-deck wagons, a train that uses the same type of locomotive and double-deck wagons. Th...
A parametric study of a thick, incompressible flow over a curved surface
The purpose of this paper is to investigate the lift phenomenon produced by the Coanda effect when a fluid flows over a curved surface. A secondary goal was to quantify and to integrate it on super circulation wing aircr...
Some Aspects Regarding “Sense and Avoid” Requirements for UAV Integration in the National Air Space
The purpose of this article is to show the importance of mission planning in a fully automatic flight and the critical role of implementing Sense & Avoid (S&A) procedures at different categories of UAVs. Modern o...
Drop dispensing in a viscous outer liquid
The formation and detachment of Newtonian drops in viscous external liquids is investigated. A global analysis of two necking processes is presented in order to highlight the behavior of such thinning phenomena, when con...
A new solid particle erosion model for oriented fiber composite materials
The work describes a new model of erosion estimation equation which factors in both the impingement angle α and the fiber orientation angle β. Two examples of particular erosion equations are presented, for carbon fiber...