This paper shows a method to obtain the exact solution for a missile and an aircraft differential games which minimizes and maximizes the essential pay-off of the problem: the miss distance, without employing any linearized approximation. For this purpose, we introduced the concept of energy maneuverability. Once the families of optimal terminal surfaces are obtained, the proposed method can so...

Based on previous work, a Nussbaum gian controller is proposed to solve the unknown input direction problem of a large family of supersonic missiles. Also considering the one order dynamic characteristic of actuator , the uncertainties of nonlinear missile system, which is assumed to satisfy the socalled bounded uncertainty condition, are coped by the adopting of integral action and backsteppin...

Naval warfare is shifting from an almost exclusive deep water, open ocean engagement to a littoral environment where high-value surface ships are forced to operate in close proximity to land, exposing those ships to a new, significant threat the high speed, sea skimming missile launched from coastal defenses, mobile land launchers, and patrol craft and maritime aircraft operating close to shore...

A new algorithm, advantage learning, is presented that improves on advantage updating by requiring that a single function be learned rather than two. Furthermore, advantage learning requires only a single type of update, the learning update, while advantage updating requires two different types of updates, a learning update and a normilization update. The reinforcement learning system uses the ...

This essay offers a broad view of active defense derived from the concept of active air and missile defense. This view admits a range of cyber defenses, many of which are widely deployed and considered essential in today’s threat environment. Instead of equating active defense to hacking back, this wider interpretation lends itself to distinguishing different types of active defense and the leg...

This paper addresses the issue of predicting where a boosting threat missile will be several minutes in the future. The prediction issue is important for missile defense because it can be a key factor in determining how heavy an exoatmospheric interceptor has to be. Simplified examples are presented comparing the effectiveness of two prediction methods in terms of accuracy and robustness. Final...

The traditional approach to improving the lethality of a missile has been to concentrate efforts in the guidance and control systems to improve accuracy and agility. In this paper, we consider how optimizing the endgame, the final few milliseconds before detonation, can yield improvements in overall lethality. As there is likely to be uncertainty in both the target parameters and missile coordi...

A novel optimisation framework using an adjoint cost sensitivity calculation, and integrating computer simulations of fluid dynamics, rigid body dynamics and control is proposed. A generic tail-fin steered missile under closed-loop control is used to show that the framework is able to generate a detailed geometrical tail-fin design and tune control performance parameters that are directly relat...

In this paper a full order observer has been designed using generalized matrix inverse. The design method resolves the state vector into two unique components, of which one is known and the other is unknown. This method does not assume any structure of the observer and imposes no restriction on the output distribution matrix. Condition of existence of such observer is presented with proof. An i...

AIM To observe the neurological complications arising from various tribal practices and their management. Penetrating head injuries comprise only a small number of total head injuries. A penetrating head injury by deliberate attempt to treat an ailment is almost unheard of. MATERIAL AND METHODS We present here a case of penetrating head injury caused by stabbing a scissor in head by a local w...