Missile

About: Missile is a research topic. Over the lifetime, 12829 publications have been published within this topic receiving 94307 citations. The topic is also known as: guided missile & missiles.

Finite Time Stability Approach to Proportional Navigation Systems Analysis

Abstract: The e nite time stability of proportional navigation guidance systems is considered. Assuming planar geometry and linear missile dynamics, a proportional navigation missile ‐target guidance model is e rst formulated. The model exhibitsa feedback cone guration consisting of a lineartime-invariant element and a time-varying gain. The dee nition of e nite timeglobal absolutestability isthen presented. Itisshown that by employing thecirclecriterion, the e nite time stability of the guidance dynamics can be analyzed. An analytic bound for the time of e ight up to which stability can be assured is established. The bound depends on the system parameters and the time of e ight. Less conservative results, as compared to previous works, are obtained. This approach enables not only analysis of the system behavior for given missile dynamics, but more importantly, enables generation of a tool for system design. Illustrative examples are presented showing the effect of the system parameters on the bound. In addition, some design implications, such as the relation to miss distance, are outlined.

Ballistic Missile Defense

Abstract: Defense against nuclear attack so natural and seemingly so compelling a goal has provoked debate for at least twenty years. Ballistic missle defense systems, formerly called antiballistic missile systems, offer the prospect of remedying both superpowers' alarming vulnerability to nuclear weapons by technological rather than political means. But whether ballistic missile defenses can be made to work and whether it is wise to build them remain controversial. The U.S.-Soviet Anti-Ballistic Missile Treaty of 1972 restricts testing and deployment of ballistic missile defenses but has not prohibited more than a decade of research and development on both sides. As exotic new proposals are put forward for space-based directed-energy systems, questions about the effectiveness and wisdom of missile defense have again become central to the national debate on defense policy.This study, jointly sponsored by the Brookings Institution and the Massachusetts Institute of Technology, examines the strategic, technological, and political issues raised by ballistic missile defense. Eight contributors take an analytical approach to their areas of expertise, which include the relationship of missile defense to nuclear strategy, the nature and potential applications of current and future technologies, the views on missile defense in the Soviet Union and among the smaller nuclear powers, the meaning of the Anti-Ballistic Missile Treaty for today's technology, and the present role and historical legacy of ballistic missile defense in the context of East-West relations. The volume editors give a comprehensive introduction to this wide range of subjects and an assessment of future prospects. In the final chapter, nine knowledgeable observers offer their varied personal views on the ballistic missile defense question.

Finite-time cooperative guidance laws for multiple missiles with acceleration saturation constraints

Abstract: The problem of cooperative guidance of multiple missiles attacking a stationary target, which can be achieved by consensus of the times-to-go is illustrated in this study. First, the finite-time cooperative guidance (FTCG) law is put forwarded to realise rapid and precise consensus of the times-to-go of all the missiles. Then, the FTCG law is modified to accommodate the condition in the presence of acceleration saturation constraint, and global ultimately finite-time consensus of times-to-go is also guaranteed. Finally, in order to adapt the realistic situation that each missile can only employ neighbour-to-neighbour communication, the distributed FTCG law is proposed. This guidance law adopts the sequential method, and can also cope with acceleration saturation constraint. The simulation results based on current control scheme and the comparison with the previous method demonstrate the effectiveness of the proposed laws.

Suboptimal Midcourse Guidance of Interceptors for High-Speed Targets with Alignment Angle Constraint

Abstract: Using the recently developed computationally efficient model predictive static programming and a closely related model predictive spread control concept, two nonlinear suboptimal midcourse guidance laws are presented in this paper for interceptors engaging against incoming high-speed ballistic missiles. The guidance laws are primarily based on nonlinear optimal control theory, and hence imbed effective trajectory optimization concepts into the guidance laws. Apart from being energy efficient by minimizing the control usage throughout the trajectory (minimum control usage leads to minimum turning, and hence leads to minimum induced drag), both of these laws enforce desired alignment constraints in both elevation and azimuth in a hard-constraint sense. This good alignment during midcourse is expected to enhance the effectiveness of the terminal guidance substantially. Both point mass as well as six-degree-of-freedom simulation results (with a realistic inner-loop autopilot based on dynamic inversion) are presented in this paper, which clearly shows the effectiveness of the proposed guidance laws. It has also been observed that, even with different perturbations of missile parameters, the performance of guidance is satisfactory. A comparison study, with the vector explicit guidance scheme proposed earlier in the literature, also shows that the newly proposed model-predictive-static-programming-based and model-predictive-spread-control-based guidance schemes lead to lesser lateral acceleration demand and lesser velocity loss during engagement.