I. INTRODUCTION The missile control system operation can be explained in three layers, the guidance system, the autopilot system and the actuator system. These three subsystems are present in all the tactical aerospace vehicles. The guidance system does the job of path correction, i.e. it finds the relative distance and line of sight (LOS) of the missile with its target with the help of on-board or off-board sensor systems. The guidance provides reference command to the autopilot in the form of desired acceleration/orientation required to keep the missile in the desired trajectory which will eventually lead to successful interception of the target. The autopilot system is the inner feedback control system which detects and reduces the difference between the commanded and actual acceleration/orientation by giving commands to the actuator system. The actuator system produces the desired deflection in the control effectors such that sufficient control force is produced to steer the vehicle along the desired trajectory. The block diagram of the three layered control scheme is shown in Fig.1 [58]. The function of autopilot is twofold, steer the vehicle as per the guidance command and ensure stability throughout the flight. The design problem of autopilot for tactical aerospace vehicle (TAV) is considered and an attempt has been made to provide a compilation of the work carried out in this field in the past three decades. In the next section, the autopilot design problem is explained. In section III- research works in the design of autopilots for tactical aerospace vehicles emerged in the past three decades have been compiled chronologically, based on the models used and based on the control philosophy in section IV. In section V, sum... ... middle of paper ... ...sformation method in control of agile interceptors and missiles with advanced microeletromechanical actuators”, Conf. on Decision and Control, Hawaii, December-2003. [70] Chen, Y.H., Chuang, J., Lee,T.S., “Fuzzy modelling and uncertainity based control for non-linear systems”, American Control Conference, Philadelphia, June 1998. [71] Weil, R.D., Wise, K.A., “Blended aero and reaction jet missile autopilot design using VSS technique”, Conf. on Decision and Control, Brighton, England, Dec-1991. [72] Balakrishnana, S. N., Ohlmeyer, E.J., Xin, M., “Integrated Guidance and control of missiles with θ-D method”, IEEE Trans. on Control Systems Technology, vol-14, issue-6, pp. 981-992, Nov-2006. [73] Jia, X., Liu, Z., “Novel Backstepping design for blended aero and reaction jet missile autopilot”, Journal of Systems Engineering and Electronics, vol-19, issue-1, Feb-2008.
unmanned are being used in the new concept of military operations. The placement of Special
PRECISION ENGAGEMENT provides NORAD the capability to precisely engage threats throughout the full range of our surveillance coverage to ensure off-shore threat engagement well before air and space weapons threaten Canadian or American citizens. This requires agile platforms with lethal munitions to enage targets more responsively and accurately from longer distances and precise, immediate operational assessments with the agility to re-engage if required. The system will include a flexible, near real-time targeting architecture, including space-based wide area surveillance, rapid identification, tracking, and near real-time sensor to shooter links.
The Vietnam War provided challenging and exciting times for United States (US) military aviation. Jets were still considered new technology at the beginning of the 1960’s and had not been tested thoroughly during the Korean War. As the situation in Vietnam started to escalate, US leadership recognized the importance of air superiority and the need to use and adapt newer technology. Air superiority can be achieved through multiple means, but none as romanticized and iconic as aerial combat. The general concept remains the same even to this day—defeat the other plane. However, the means to winning a dog fight had changed greatly due to the quick advancement in jet propulsion and guided weapon technology. This paper provides a summarization of the US efforts towards achieving air superiority through the means of aerial combat.
Many people are amazed with the flight of an object, especially one the size of an airplane, but they do not realize how much physics plays a role in this amazing incident. There are many different ways in which physics aids the flight of an aircraft. In the following few paragraphs some of the many ways will be described so that you, the reader, will realize physics at work in the world of flight.
The future of the aerospace industry will involve gradual changes in the near term, with the prospect of more radical shifts in the decades t...
Wright, D. & Postol, T. (2000, May 11). Missile defense system won't work. Common Dreams News Center. Retrieved March 6, 2003, from http://www.commondreams.org/views/ 051100-101.htm
In order to effectively manage the national airspace system in the future we will need to implement Free Flight. Free Flight is a concept designed to enhance safety and efficiency of the airspace by allowing aircraft to choose their own route instead of using victor airways (www.ads-b.com 1). Along with this freedom there is still the problem of aircraft separation which when on an instrument flight plan is air traffic control's (ATC) responsibility. In free flight there may be areas where ATC cannot give the required collision avoidance necessary. In order to safely manage the safety zone around an aircraft, pilots will need to rely on systems installed in the aircraft for better separation.
The book begins with a look into World War II and how the event of Pearl Harbor pressed the need for aerial reconnaissance. The first chapter gives the different technological challenges that had to be faced in order to achieve aerospace superiority. This chapter takes a close look into the development of the WS-117L reconnaissance satellite and how the two projects are related.
Aviation has come a long way since the 19th century, from the Wright brothers taking flight with the first powered and controlled gliders, to aircraft that can travel up to supersonic speeds, orbiting satellites and space stations which then were only thought to be science-fiction. Aerospace and aviation has proven to be one of the biggest challenges to advance in the entirety of human existence. There are many factors and characteristics that contributed to this advancement such as the engines of aircraft, forces of flight, aerodynamic forces, wingspans etc. The two most significant aspects however have been; World War 1 and World War 2.
It was originally assumed that the SDI program was a virtually perfect defense against a large intercontinental ballistic missile, or ICBM, attacks, which required very competent weapons. An ICBM has three levels of flight; the boost phase, the midcourse phase, and the terminal phase. With the SDI program, a space-based directed energy, or a laser, weapon would be used to destroy ICBM’s in the boost phase. Ground-based, space-based lasers or continental weapons could be used to destroy ICBM’s in midcourse, and ground-based beam weapons and missile interceptors could be used to destroy ICBM’s in the terminal phase. But as the goals of the program have evolved toward more realistic ambitions, the requirements for highly competent weapons diminished. Therefore, the initial focus on space-based directed energy weapons gradually shifted toward interest in ground-based kinetic energy weapons.
Several military robotic automation systems already operate at the level where the human is still in charge and responsible for the deployment of lethal force, but not in a directly supervisory manner. The Phalanx system for Aegis-class cruisers in the Navy is designed to be the last line of defense against anti-ship missiles. The gun mount moves with rapid precision. The system takes a low amount of input from the ship, making it capable of functioning despite potential damage to the ship. There are several settings for the Phalanx system, with the final fail safe setting of “casualty” that will defend the ship from air attacks without human selection of targets. The MK 69 encapsulated torpedo (CAPTOR) sea mine system was the U.S. Navy's standard anti-submarine mine during the Cold War, having enough computer power t...
Aviation industry deals with more than thousands of people and also spending millions of funds in order to meet the requirements, satisfy the necessities of people and to produce state-of-the-art aircraft. With its objective it is significant to consider the hazards involved and bring out an output with the least extent and under control risks to prevent any loss in terms of life and even profit.
Taylor, John, W.R. (1977). Jane's pocket book of remotely piloted vehicles: Robot aircraft today. New York: Collier Books.
The future of passenger aircraft and their manufactures has an amazing outlook. Every year the brightest minds in aviation compile the greatest technological advances towards creating the safest and most economical aircraft on the planet. No detail is over looked, and the bottom dollar is the all controlling factor. From private aircraft to public aircraft, space exploration and beyond, the future is bright for the passenger aircraft market, and everyone who purchases air travel should be excited to see how industry unfolds.
A in November 1962, the British and French governments agreed to develop and build a supersonic aircraft. Each design presents an aerodynamic supersonic aircraft with a range of difficult problems, including two that have the highest interest powerplant installation and design of subsonic aircraft. supersonic speed because it is there are many configuration changes have been introduced, particularly in the areas of the nose and visor, rear wing and fuselage. the head of...