The aim of the paper is to control the path for nonlinear missile model in the pitch channel using Model Reference Adaptive Control (MRAC) and L1 Adaptive Control with Linear Quadratic Regulator Time Varying (LQRTV) strategy. Linear Time Varying (LTV) model that represents the closed approximation of nonlinear flying body is designed where the parameters of LTV model are varying with time. The equations of motion for nonlinear flying body and two structures of adaptive control (MRAC and L1 adaptive control) with LQRTV are modeled mathematically in Matlab-Simulink environment. LQRTV optimal control is designed using LTV model by online calculation of Riccati Equation to get time varying state feedback gain K(t). Adaptive control structures …show more content…
The designing for adaptive control with LQRTV strategy using a six degree of freedom (6-DOF) missile model in pitch channel will be addressed in this paper. The 6-DOF missile model is the solution to get true information for the missile path. The paper aims are (1) evolve a complicated mathematical model of flying path simulation for a missile in pitch channel, which is utilized as an algorithm sharing for designing, analyses, and growth the framework to perform the missile by Simulink to ease the designing for control structure (2) According to the system features and application environment required, the structures of adaptive control (MRAC and L1 adaptive control) with a linear quadratic regulator time varying (LQRTV) strategy is proposed to solve the missile attitude control problem, [1-3]. LQRTV optimal control is designed using linear time varying (LTV) model by online calculation of Riccati Equation to get time varying state feedback gain K(t). Adaptive control structures are designed using closed loop LTV model by online calculation of Lyapunov Equation to get time varying Lyapunov gain matrix P(t). Adaptive control structures with LQRTV controller is capable of recover the chains that represent natural boundaries of pitch angle actuators. The wind and different dynamic uncertainty percentages for 6-DOF missile aerodynamic coefficients are represented and their effects are studied. According to MacKenzie, guidance is defined as the
Air Defense had a prominent involvement in The Persian Gulf War. The Patriot missile system demonstrated its effectiveness in combat in 1990 and United States (U.S.) forces as well as Iraqi forces utilized the Homing All the Way Killer (HAWK) missile system. Air Defense’s considerable involvement in the Persian Gulf War accredited to the developments and capabilities of the Patriot missile system along with the HAWK missile system’s Iraqi dilemma.
The missile system reduced Scud annoyance and effectiveness. Patriot’s mission to counteract air born threats was an overall success. This war was a major demonstration of U.S. air defense capability. Although every fire did not successfully destroy its target, it exemplified extraordinary accuracy. The Patriot world is continuously evolving. Modifications to the software has been made, and today’s system has multiple intercept mechanisms. PAC 2 in no longer the only source of air defense capability. The PAC 3, a more sophisticated missile defense system, has a more accurate interception rate. A growing technology, and it will continue to expand in the future, air defense is here to
Control Theory is the theory of support. This theory demonstrates an individual's social bonds in relation to their performance. Since certain bonds are stronger in certain kinds of lifestyles the affects will be different in all situations. Control theorists believe “in the rationality of the criminal act that the individual behaves in a criminal manner for ordinary reasons, and this behavior arises out of the person’s own free will” (Moyer, 2001, 133). However, deviant behavior is prevalent in today’s society. It is a major problem concerning adolescents all across the world. This theory carries serious paternalistic roles.
Ever since the development of the first few examples of rocket power, it was evident that this was technology that was going to change the face of the world forever. Since missiles and other weaponry were now able to be launched across continents and even oceans, it made the world feel a whole lot smaller. In turn, this was the technology that “had its ultimate foundation in the simple power rocket which originated as a weapon of war” . However, this technology underwent an extreme transformation over time and was eventually the basis of the technology used to put spacecrafts up in space. One of the main rockets that is going to be discussed in this paper is the V2 rocket designed by the Germans during World War II, as much of the technology that put spacecrafts in space came from this rocket. Another aspect that is going to be
ravis Hirschi has dominated control theory for four decades. His influence today is undiminished and likely will continue for years, if not decades, to come (see, e.g., Britt & Gottfredson, 2003; Gottfredson, 2006; Kempf, 1993; Pratt & Cullen, 2000). Beyond the sheer scholarly talent manifested in his writings, what accounts for Hirschi’s enduring influence on criminological theory? Three interrelated considerations appear to nourish the appeal of his thinking. First, Hirschi’s theories are stated parsimoniously. This means that his theory’s core propositions are easily understood (e.g., the lack of
(a) Under pure proportional control, what is the range of values that Kc can take for
In today’s digital age, development of new technology and weapons are at an alarming rate, hence arises the need to stay ahead of advancements in order to properly defend the nation, as well as coalition forces and allies. In this period of warfare, the number one threat comes in the form of air breathing and ballistic missiles. During World War II, this threat was present, but was not thought to be prevalent.
The Patriot Advanced Capability 2 version acquired the capability to operate against other missiles, beyond just aircrafts, by the US armed forces through an improved fuse and warhead in comparison to the PAC-1 (Maital & Seshadri, 2012). Furthermore, the US Army made changes to not only the software of the PAC-2 missile but the radar system which guided it. These improvements gave the missiles the ability to intercept other missiles which was different than previous models. Interception in this case was not considered just the capability to knock a missile off course but to destroy them which was the objective of this product. Beyond physical attributes, it acquired them through the recognition that tactile ballistic missiles were all over Europe and increased threats, prompting improvements to occur (Maital & Seshadri, 2012).
The introduction of aircraft had begun a new era in warfare. No longer were military powers limited to the boundaries of vehicles that were restricted to land. The evolution of aircraft technology helped pioneer a new type of combat strategy that played a significant role in determining the outcome of a battle. Air combat also influenced the economies of the participating countries. The whole cycle of airplanes from the assembly line to the pilot became factors that added up to become an advantage or disadvantage.
The Predator C, “Avenger” developed and built by General Atomics Aeronautical, is an upgraded version of its predecessors the MQ-1 and MQ-9 and is meant to support military operations well into the next decade. Powered by a Pratt & Whitney PW545B turbofan engine the Avenger is capable of speeds up to 400 knots true air speed (KTAS), and operational altitudes of up to 50,000 feet, well outpacing its predecessors (CITE). The Avenger has also been further optimized to reduce its Radar Cross Section (RCS), making it less detectable by enemy air defenses. Beyond its ability to out-fly the original Predator UAS, the Avenger is able to be equipped with a more capable and configurable sensors and weapons package. These advancements make the Predator C Avenger the most capable and universal hunter-killer type UAS
Unlike other surface combatants with conventional ammunition, aircraft carriers can safely remain hundreds of miles off the coast of a nation and strike farther inland by utilizing their embarked air wing (Thompson). Also unlike other surface combatants that sail closer to shore, the air wing of the carrier cannot be torpedoed or hit by an enemy mine; the small size and advanced deception technology on the carrier’s various aircraft also make them much more difficult for the enemy to detect than a visible destroyer or cruiser parked directly off their coast. When analyzing the US’s supercarriers, each of their 70 aircraft fulfill a certain role in the theater of war, but they all provide the Navy with the means to dominate the enemy in the sky, on the sea, and on land through electronic and conventional offensive and defensive means
The Korean War marked the end of the Anti-Aircraft tank era, and launched the technology of modern missile based Air Defense systems. First, the History of Air Defense before, up to the Korean War, and the role Air Defense played during the Korean War. Second, the role that Air Defense played in the Korean War. Lastly, the lessons learned from the Korean War and how modern Air Defense implemented lessons learned. The Air Defense Artillery has always grown and adapted throughout its history, but made its most significant technological advancements directly following the Korean War.
In 1968, the Soviet Union came up with a new development- the building of antiballistic missiles defence systems. These were to be used for nuclear, chemical, biological or even conventional warheads in the homeland defence of such a strike because they were designed to counter ICBM’s. As a method to counter this development, United States came up with multiple independently targeted re-entry vehicles (MIRV’s) which improved the chances of avoiding detection by ABM systems. In addition to this, United States also developed its own IBM in order to match that of Soviet Union.
Ever since I was little I was amazed at the ability for a machine to fly. I have always wanted to explore ideas of flight and be able to actually fly. I think I may have found my childhood fantasy in the world of aeronautical engineering. The object of my paper is to give me more insight on my future career as an aeronautical engineer. This paper was also to give me ideas of the physics of flight and be to apply those physics of flight to compete in a high school competition.
The purpose of this case study is to describe and analyse the features of the management control system (MCS) of University of Southern California (USC). Before commencing the analysis a brief background of USC is provided.