In this thesis, adaptive neural network controllers are designed for a high subsonic cruise missile. Two autopilot designs are included in the study using adaptive neural networks, namely an altitude hold autopilot designed for the longitudinal channel and a directional autopilot designed for heading control. Aerodynamic coefficients are obtained using missile geometry / a 5-Degree of Freedom (5-DOF) simulation model is obtained, and linearized at a single trim condition. An inverted model is used in the controller. Adaptive Neural Network (ANN) controllers namely, model inversion controllers with Sigma-Pi Neural Network, Single Hidden Layer Neural Network and Background Learning implemented Single Hidden Layer Neural Network, are deployed to cancel the modeling error and are applied for the longitudinal and directional channels of the missile. This approach simplifies the autopilot designing process by combining a controller with model inversion designed for a single flight condition with an on-line learning neural network to account for errors that are caused due to the approximate inversion. Simulations are performed both in the longitudinal and directional channels in order to demonstrate the effectiveness of the implemented control algorithms. The advantages and drawbacks of the implemented neural network based controllers are indicated.

Thesis--(Licentiate)--Royal Institute of Technology, Stockholm, 2007. / Original thesis t.p. and absdtract on 1 leaf inserted. Includes bibliographical references (p. 107-109).

Med den nya omvärldsutvecklingen där NATO moderniserar sitt missilförsvar i Europa samt att Ryssland har placerat taktiska ballistiska robotar i Kaliningrad påverkade Sveriges behov till att anskaffa förmågan att bekämpa ballistiska robotar. Sverige har därför anskaffat Patriotsystemet, dock utan att tillföra ett radarsystem för att invisa ballistiska robotar till luftvärnsförbandet. Missilförsvar är ett väl utforskat område, allt från bekämpningsförlopp till hur en sensorkedja ska se ut. Forskningen tar däremot inte upp vilka förutsättningar ett nyanskaffat radarsystem behöver innefatta för att bidra till att invisa ballistiska robotar för luftvärnsförbanden. I uppsatsen genomfördes en modellering, teknisk analys, där teorin missilförsvar en kedja av event nyttjades för att härleda krav på radarprestanda. En analys om hur organisationerna idag nyttjar radarsystem och hur de tekniska och taktiska kraven påverkar organisationen genomfördes med konceptet militär nytta. Resultatet visar att organisationen där radarsystemet tillförs behövde kompletteras med ett sensorkompani och säkerhetsförband för att uppfylla kravet till invisning. Mot bakgrunden av det scenario som togs fram för undersökning visar den tekniska analysen att radarn vara fordonsburen samt ha en räckvidd på 500 km och en höjdtäckning på 50 km. Den måste även vara kompatibel med Patriotsystemet samt en sensorkedja för strategiskt partnerskap. / With the new developments in international affairs, where NATO modernizes its missile defense system in Europe and Russia has placed tactical ballistic missiles in Kaliningrad, Sweden needs to acquire the ability to combat ballistic missiles. Sweden has therefore acquired the Patriot system, however without adding an early warning radar for the Air defense against ballistic missile. Missile defense is a well-explored area, ranging from missile defense events to how a sensor chain should function. The research does not, however, discuss the abilities an acquired radar system needs to help guide ballistic missiles for Air defense units. In this essay, a modeling and a technical analysis based on the theory Missile defense a chain of events are used to conclude requirements for radar performance. An analysis of how the organizations use radar systems today and how the technical requirements affect the organizations was implemented with the concept Military utility. The result indicates the organization there the radar system will be implemented needs to be reinforced with a sensor company and a security unit to meet the requirement for guidance. The background of the scenario that has been developed for the analysis shows that the radar should be integrated to a vehicle, have a range of 500 kilometers and a height coverage of 50 kilometers. Battle management systems must also be compatible with the Patriot system and the sensor chain for strategic partnership.

The high costs and political tensions associated with Ballistic Missile Defense Systems (BMDS) has driven much of the testing and evaluation of BMDS to be performed through high fidelity Modeling and Simulation (M&S). In response, the M&S environments have become highly complex, extremely computationally intensive, and far too slow to be of use to systems engineers and high level decision makers. Regression models can be used to map the system characteristics to the metrics of interest, bringing about large quantities of data and allowing for real-time interaction with high-fidelity M&S environments, however the abundance of discontinuities and non-unique solutions makes the application of regression techniques hazardous. Due to these ambiguities, the transfer function from the characteristics to the metrics appears to have multiple solutions for a given set of inputs, which combined with the multiple inputs yielding the same set of outputs, causes troubles in creating a mapping. Due to the abundance of discontinuities, the existence of a neural network mapping from the system attributes to the performance metrics is not guaranteed, and if the mapping does exist, it requires a large amount of data to be for creating a regression model, making regression techniques less suitable to BMDS analysis. By employing Nested Neural Networks (NNNs), intermediate data can be associated with an ambiguous output which can allow for a regression model to be made. The addition of intermediate data incorporates more knowledge of the design space into the analysis. Nested neural networks divide the design space to form a piece-wise continuous function, which allows for the user to incorporate system knowledge into the surrogate modeling process while reducing the size of a data set required to form the regression model. This thesis defines nested neural networks along with methods and techniques for using NNNs to relieve the effects of discontinuities and non-unique solutions. To show the benefit of the approach, these techniques are applies them to a BMDS simulation. Case studies are performed to optimize the system configurations and assess robustness which could not be done without the regression models.

Most publications discussing missile interception systems assume a zero computer response time. This thesis studies the impact of computer response time on single-missile single-target and multiple- missile multiple-target systems. Simulation results for the final miss distance as the computer response time increases are presented. A simple online cooperative adjustment model for multiple-missile multiple-target system is created for the purpose of studying the computer delay effect.

In coastal defense operations, anti-ship missile (ASM) attacks on amphibious assault high value targets (HVT) constitutes a window of opportunity with decisive potential. However, in war, the availability and performance of ASM-forces is uncertain and most likely less than ideal. This thesis explores how organizational and technological flexibility can be a solution to such uncertainties. This is achieved by modeling representative examples of weapon redundancy, weapon versatility, and a flexible balance between offensive and defensive powers. A Two-Layer Defense HVT Acquisition Missile Salvo Model is developed, as an extension of Hughes Missile Salvo Model, to enable detailed study of sub-saturation attacks that rely on missiles leaking through target defenses. The result of this study shows that organizational and technological flexibility can potentially enhance ASM-attacks directed at the HVTs of an amphibious assault in multiple ways. Mentionable key-findings are that additional ways of challenging target defenses, additional firepower, and increased lethality through characteristics such as precision will create tolerance to loss and tactical benefits.

ITC/USA 2006 Conference Proceedings / The Forty-Second Annual International Telemetering Conference and Technical Exhibition / October 23-26, 2006 / Town and Country Resort & Convention Center, San Diego, California / Last year (2005), a paper discussed the efforts of integrating Joint Advanced Missile Instrumentation (JAMI) Program components (JAMI TSPI Unit - JTU, and the Flight Termination Safe & Arm device - FTS&A), commercial off the shelf parts (Flight Termination Receivers, Telemetry Transmitter, Encryptor and Thermal Batteries) and in-house developed devices (PCM Encoder and Tri-band Antenna with integrated Limiter, Filter, & Amplifier) into a five-inch diameter Missile Telemetry (TM) Section. This retrofitted missile would be captive-carried on a F/A-18 jet. This paper is a continuation of that one presented at the 2005 International Telemetry Conference (ITC) Symposium. It annotates the latest status of the JAMI Effort, as well as the Follow-On Effort to qualify the Missile TM Section for an actual missile firing. This would include the developmental and flight qualification efforts for the Explosive Train (Detonation Cord-to-Cutter Ring Assembly) and Thermal Batteries.

ITC/USA 2009 Conference Proceedings / The Forty-Fifth Annual International Telemetering Conference and Technical Exhibition / October 26-29, 2009 / Riviera Hotel & Convention Center, Las Vegas, Nevada / Past presented papers [1,2] have discussed the integration efforts of incorporating Central Test & Evaluation Investment Program (CTEIP) sponsored Joint Advanced Missile Instrumentation (JAMI) components (namely the JAMI TSPI Unit-JTU), Commercial off the Shelf (COTS) parts (e.g. ARTM Tier I SO-QPSK Transmitter, Encryptor and Thermal Battery), and in-house developed devices (such as PCM Encoder and Dual Band Antenna) into a five-inch diameter Missile Telemetry (TM) Section. A prototype of this TM Section has been built up and integrated into an All Up Round (AUR) Missile and twice flown as a Captive Carried Test Missile (CTM) on an F/A-18 jet with great success. This TM Section has passed all flight qualification testing (including environmental and electro-magnetic interference-EMI tests). This paper will detail the current efforts to incorporate Flight Termination System (FTS) capabilities into this TM section. In addition, the effort to upgrade some Navy and Air Force Test Ranges (with JAMI Ground Stations and Decommutators/Demodulators) to track and gather data from this Missile containing the new TM section will be discussed.

ITC/USA 2008 Conference Proceedings / The Forty-Fourth Annual International Telemetering Conference and Technical Exhibition / October 27-30, 2008 / Town and Country Resort & Convention Center, San Diego, California / Past presented papers have discussed the integration efforts of incorporating Central Test & Evaluation Investment Program (CTEIP) sponsored Joint Advanced Missile Instrumentation (JAMI) components (namely the JAMI TSPI Unit-JTU), Commercial off the Shelf (COTS) parts (e.g. ARTM Tier I SO-QPSK Transmitter, Encryptor and Thermal Battery), and in-house developed devices (such as PCM Encoder and Dual Band Antenna) into a five-inch diameter Missile Telemetry (TM) Section. A prototype of this TM Section has been built up and integrated into an All Up Round (AUR) Missile and twice flown as a Captive Carried Test Missile (CTM) on an F/A-18 jet with great success. This TM Section is in the process of undergoing flight qualification testing (including environmental and electro-magnetic interference-EMI tests). After which it will be ready for mass production. This paper will detail these current efforts. In addition, the effort to upgrade some Navy and Air Force Test Ranges (with JAMI Ground Stations and Decommutators/Demodulators) to track and gather data from this Missile containing the new TM section will be discussed. Future plans to incorporate Flight Termination System (FTS) capabilities into the TM section will be covered as well.

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