Missile Launch Research Articles

A New Frangible Composite Canister Cover with the Function of Specified Direction Separation

A lightweight and auto-separated canister cover is required for quick launching in some specific missile launchers. In this paper, a new frangible composite canister cover with the function of specified direction separation is proposed and studied via both experimental and numerical approaches. The frangible canister cover with local non-split weak zone structure, which is manufactured by traditional hand lay-up process with vacuum assisted resin infusion (VARI) method, is designed to fail and separate in a predetermined and specified direction in comparison with the cover with full split weak zone structure. This design is innovative and also necessary for reduction of potential risk to peripheral equipment around the missile launcher. The failure pressure of the cover is determined on the basis of the failure criteria used in finite element (FE) model. In experimental pressurized testing, a number of frangible canister covers subjected to pressure loadings in six cases are studied. Close agreements between the experimental and numerical results have been examined. The frangible canister covers with local non-split weak zone structure which have been studied can be separated and fly out to the specified direction.

(Re)Design for Additive Manufacturing

3D-printing has been used to create prototypes during the development phase for more than 20 years. Now, functional parts can be printed directly in specific metal powders using similar layer-by-layer techniques. The additive method is unlike traditional mass production manufacturing methods in many ways, creating new possibilities for designers to realise new and different design ideas previously impossible to manufacture. When products are mass produced, there is a desire to improve manufacturability. This is traditionally done by a designer with knowledge about certain manufacturing methods altering design choices to make it cheaper to manufacture.This paper shows different design for AM (DfAM) methods where performance and part cost are both of interest. It adds to existing research by classifying design for additive manufacturing in two different classes; process-driven and designer-driven shaping of parts. A cost-prediction model for Selective Laser Melting (SLM) printed parts is suggested as an initial step to choose parts for redesign from an economical perspective. A case study of a missile launcher beam redesigned for additive manufacturing using three different approaches is presented. Differences and similarities in design methods are discussed and the redesigned parts are compared for mass and cost. It is shown that redesigning for AM can reduce mass but depending on part size and print speed, the part can become more expensive than the original design, creating a need to know the customer value of what the redesigned part provides, in this case, the value of reduced mass.

대북 바이오가스플랜트 지원의 제재 가능성에 대한 기술적 평가

Under the economic banner of self-reliance, North Korea has focused on hydro and thermal power as its main energy supply sources. However, in the face of extreme energy penury caused by machinery and material supply instability in the wake of the collapse of the former communist block as well as equipment aging and deterioration due to floods and other disasters, North Korea and international aid organizations are increasingly turning their attention toward energy source diversification. In particular, renewable energy is recognized as the best strategic energy source for North Korea and it is a decentralized energy option that is suitable in light of North Korea`s power distribution networks and its pursuit of self-reliance. Biogas can contribute to improving the human rights situation of North Koreans in conjunction with an increase in food production. For this reason, renewable energy is the most promising option for an energy source that is likely to secure humanitarian aid from international organizations such as the Food and Agricultural Organization (FAO) and the World Food Programme (WFP). However, the implementation of such humanitarian aid has been hampered by rising concerns about the diversion of provided energy materials for military purposes and the disguised introduction of dual use items strategic materials as well as UN Security Council resolutions and sanctions of the international community against North Korea`s military provocation, including nuclear tests and missile launches. This paper explores the possibility of solving this dilemma and proceeding with the humanitarian aid to North Korea by evaluating the potential for sanction and the risk of diversion of the possible products for biogas-related aid on the basis of the list of UN-sanctioned items.

Shifting Sands: The United States in the Middle East

Shifting Sands: The United States in the Middle East

Israel’s Human Shields Defense

Israel’s Human Shields Defense

Japan’s New Security Legislation: What Does This Mean to East Asian Security?

ABSTRACTIt is obvious that the security environment in East Asia is more unstable and unpredictable. In the South China Sea, tensions over disputed islands initiate a more severe Sino–American rivalry. In the East China Sea, China disputes the control over the Senkaku Islands, and is escalating military activities around those islands. North Korea continues provocative activities including launching of ballistic missiles and nuclear weapons tests. This naturally leads to the idea that Japan needs to play a larger role to restore stability in the international order. This paper explores the challenges facing East Asian security in the face of the passage of Japan's new security bills in 2015 and how they impact the future of Japanese security policy.

The impact of launcher turret vibrations control on the rocket launch

Abstract The paper discusses the missile lift-off from a launcher placed on a motor vehicle. The stimulation of the assembly vibration results from the input generated by the road and the missile firing. The unfavourable input generated in the course of assembly operation has an impact on the characteristics of the initial missile flight parameters. The aim of the paper is to apply the hybrid vibroisolation system of the launcher turret in order to improve the conditions of the missile launch from the assembly. The active system reducing the occurring disturbance allows to control the launcher turret vibrations. Owing to that it is possible influence effectively the initial missile flight parameters.

Adaptive nonsingular terminal sliding mode cooperative guidance law in active defense scenario

An active defense scheme in which a ballistic missile launches a defending missile to intercept the incoming intercepting missile is considered. Compared with traditional passive evasion strategies, the active defense scheme can greatly increase the ballistic missile’s survival rate. Different from many terminal guidance laws using the line-of-sight nullifying strategy, a triangle-based guidance strategy by which the defender tries to keep itself on the line-of-sight connecting the target and the incoming intercepting missile is used to design a guidance law. With such a strategy, it is proved that the interceptor’s composite acceleration can be very small due to the acceleration cancellation in the target–interceptor line-of-sight frame and the defender–interceptor line-of-sight frame, meaning that the defender can catch the interceptor with small maneuverability. Based on this strategy, an adaptive nonsingular terminal sliding mode based cooperative guidance law is proposed treating the interceptor’s acceleration as an unknown bounded external disturbance. Simulation results show the high performance of the proposed guidance law.

Research of Control Strategy in the Large Electric Cylinder Position Servo System

An ideal positioning response is very difficult to realize in the large electric cylinder system that is applied in missile launcher because of the presence of many nonlinear factors such as load disturbance, parameter variations, lost motion, and friction. This paper presents a piecewise control strategy based on the optimized positioning principle. The combined application of position interpolation method and modified incremental PID with dead band is proposed and applied into control system. The experimental result confirms that this combined control strategy is not only simple to be applied into high accuracy real-time control system but also significantly improves dynamic response, steady accuracy, and anti-interference performance, which has very important significance to improve the smooth control of the large electric cylinder.

A Numerical Method for Blast Shock Wave Analysis of Missile Launch from Aircraft

An efficient empirical approach was developed to accurately represent the blast shock wave loading resulting from the launch of a missile from a military aircraft to be used in numerical analyses. Based on experimental test series of missile launches in laboratory environment and from a helicopter, equations were derived to predict the time- and position-dependent overpressure. The method was finally applied and validated in a structural analysis of a helicopter tail boom under missile launch shock wave loading.

导弹发射姿态测量方法研究

导弹发射姿态测量方法研究

Modal Analysis on the Simulation of the Missile Launchers Based on ABAQUS

One of the inevitable problems in the missile launchers is vibration, which can lead to failure of missile launchers. The3D model of the missile launchers is created and the modal analysis is adopted by the ABAQUS. The results show that the missile launchers will have resonance. The vibration mode diagram of the missile launcher’s structure is analyzed and the weakness of the missile launchers was found. The theory for the missile launchers design and manufacture is provided.

Recasting the North Korean Problem: Towards Critically Rethinking About the Perennial Crisis of the Amoral Family State and How to Resolve it

A series of tit-for-tat events — from North Korea’s missile launch on April 13, 2012 and its third nuclear weapons test on February 12, 2013 to the UN Security Council Resolutions 2087 and 2094 — has only escalated the North Korean nuclear crisis to its new height. It is highly regrettable, if not preposterous, that the crisis has persisted basically unabated for the past 20 plus years — despite umpteen, varied and competing statecrafts of all concerned countries. This paper critically examines the extant approaches, investigating how the concerned individual states’ perhaps otherwise perfectly rational policies have led to the perpetuation of nuclear crisis, of the amoral family state, and of the kind of security and peace of the region. In so doing, it aims to offer some tentative suggestions about how to freshly rethink about the North Korean problem and how best to resolve and move beyond it.

The Work Course Simulation of Electromagnetic Coil Vertical Launcher for Missile

Through putting forward one kind of magnet coil launcher model of new structure; expound the basic component and the work principle of this launcher, built the mathematical model of this launcher work course. Through the dynamic simulation for its work progress, we get the electromagnetism that current and launch package are received power, speed and displacement etc. Comparatively analyzing the influence through changing system stored energy and to the system operating and the progression of launch coil. The result indicates: launching the coil possesses the better acceleration capability than the drive coil; Launching the speed of package energetically has the influence to electromagnetism, and along with the increase of speed, launches the electromagnetism that the package is received energetically reducing more greatly; Suitable change system stored energy can realize the vertical launch of missile with progression that launches the coil.

Air Ship Missile Carrier Aircraft Attack Array Model Research

This paper studies air defense system kill zone, air ship missile firing mode and air ship missile launch area that impact air ship missile load matrix determine key problems, establishes air ship missile carrier array’s mathematics model, makes simulation calculation of the model, and analyzes simulation results, and gets the influence law of vehicle speed, height, target motion characteristics, deviation angle and pitching angle on attack matrix, and the results can provide reference for determining air ship missile carrier aircraft attack array.

Changing law of launching pitching angular velocity of rotating missile

In order to provide accurate launching pitching angular velocity (LPAV) for the exterior trajectory optimization design, multi-flexible body dynamics (MFBD) technology is presented to study the changing law of LPAV of the rotating missile based on spiral guideway. An MFBD virtual prototype model of the rotating missile launching system is built using multi-body dynamics modeling technology based on the built flexible body models of key components and the special force model. The built model is verified with the frequency spectrum analysis. With the flexible body contact theory and nonlinear theory of MFBD technology, the research is conducted on the influence of a series of factors on LPAV, such as launching angle change, clearance between launching canister and missile, thrust change, thrust eccentricity and mass eccentricity, etc. Through this research, some useful values of the key design parameters which are difficult to be measured in physical tests are obtained. Finally, a simplified mathematical model of the changing law of LPAV is presented through fitting virtual test results using the linear regression method and verified by physical flight tests. The research results have important significance for the exterior trajectory optimization design.

Analysis of Geometric Characteristic of Missile Vertical Launching System Guide Rail

By analyzing the shipboard missile vertical launching system (VLS), we simplified the assembly model and reconstructed it with mathematical methods, established the clearance parameter and deviation angle mathematical formulas. In considering of the assembly errors of guide rail in missile vertical launcher system, we studied assembly clearance parameters effects on the system at first. And then established dynamic simulation model, researched the relationship between assembly clearance parameters and missile launching status. At last, used the above relationship model and conclusions, developed a prototype simulation method, and provided the foundation and guidance for design of missile vertical launching system.

ROBOTIC ARM CONTROLLED IN MISSILE LAUNCHERS USING PLC AND IMAGE AUTHENTICATION TECHNIQUE

As of now, the missile launchers which use Robotic Hand for holding and releasing of missiles in defense organizations are being controlled by the microcontroller. As a result of this there are many problems associated. One is that the controlling of the whole process is not perfect. Therefore we have proposed a paper where the robotic hand which controls the missile launcher will be controlled by a PLC and secured image authentication technique. In our project, the hand which is holding the missile that to be launch is controlled by the PLC. The robotic hand is operated by with the help of DC motor. The PLC controls the two kind of position of robotic hand. One is holding the missile and another one is releasing the missile. Actually the PLC is controlling the DC motor in two conditions which is holding and releasing. In the Space research center, applying the missile is very important and secure process also. So, operating with the missile launching process, secured by image authentication technique is highly required. PLC controls the robotic hand by means of ladder diagram which is nothing but programming of PLC. In that programming only our secure technique will be used. The pass code and image synchronizations are needed to execute the programming of PLC. Until the authorization the robotic hand it will not release or hold the missile.

Breaking the North Korean Nuclear Deadlock: a Global Action Plan

The North Korean nuclear problem has entered a new stage as Pyongyang has developed more robust nuclear capabilities with the successful launch of a long-range missile in December 2012, a third nuclear test in 2013, and further missile tests in June 2014. The United States is now beginning to face the real risk that North Korea could soon develop the capability to directly strike the U.S. homeland. This situation has also raised concern among South Koreans about the credibility of extended deterrence provided by the United States. At the same time, the chances of a North Korean provocation have increased as conventional deterrence becomes less important. The window of opportunity to solve the already difficult nuclear problem will not be open for long. If North Korea develops its capabilities to directly attack the United States with nuclear missiles, it will never give them up and will demand greater rewards. After a long cycle of agreements and crises, however, the United States and China seem to be experiencing status-quo fatigue, while the situation continues to worsen. Neither country has shown a strong initiative for solving the problem. This is creating an expectation that South Korea should take the initiative, and U.S. and Chinese leaders have recently expressed their

Missile Defence Shields: Automated and Anticipatory Self-Defence?

In response to the escalating rhetoric and bellicose actions emanating from the Korean peninsula in April 2013, the United States deployed Patriot Missile Systems at its overseas military bases in danger of being struck by a North Korean missile launch. Japan took similar precautionary measures. A more permanent fixture and fitting in terms of Missile Defence Systems (MDS) is Israel’s Iron Dome Shield—designed to intercept rocket attacks by Hamas militants albeit more so for strategic benefit and less so for defending the civilian population. Both defence shields / systems, however, are designed for the same purpose—to intercept missile attacks during the ‘free flight’ phase (noting that this is specifically used in the ‘Ballistic Missile Defence context’). This article examines whether use of missile defence shields help support the existence of a wider right of anticipatory self-defence. The article also addresses the point at which an‘automated’ response takes place. Does such a response fall within the barometers of necessity and proportionality that govern a state’s lawful recourse to self-defence under international law?