A small, lightweight microdevice has been developed for activity-dependent stimulation (ADS) and successfully tested for functionality in both anesthetized and ambulatory rats. Further, in semi-chronic experiments in rats with TBI using this microsystem, an unprecedented, potent effect of ADS on motor performance has been demonstrated, as compared to control rats (injured but no microdevice) and open-loop stimulation (OLS) rats. Specifically, open-loop stimulation does result in some recovery...

Topics: DTIC Archive, KANSAS UNIV MEDICAL CENTER KANSAS CITY, *TRAUMATIC BRAIN INJURIES, ANESTHESIA,...

The analysis of the dynamical control system under investigation provides a commander with a direct analog for determining combat resupply requirements for achieving a desired goal by a specified time. It is shown that the introduction of the adjoint equation provides a means for determining the input requirements for an open loop linear piecewise time invariant control system such that any one of the states can be driven to a prescribed value.

Topics: DTIC Archive, Cohen, Herbert E, *INPUT, *CONTROL SYSTEMS, *OPEN LOOP SYSTEMS, *INVENTORY CONTROL,...

Linear plants with control signals entering the open loop dynamics as amplitudes of periodic, zero average functions are considered. Stabilizability properties of such plants by state space and output feedback controllers are analyzed.

Topics: DTIC Archive, Kabamba, P T, MICHIGAN UNIV ANN ARBOR, *OUTPUT, VIBRATION, CLOSED LOOP SYSTEMS,...

A nonlinear generalization of the Adaptive Model Theory, nAMT, is compared with human open-loop tracking data across the same range of conditions. The resulting simulations produced effects that mirrored the closed- and open-loop characteristics of the experimental response trajectories. This supports the use of an internal feedback loop for the inversion of external systems in the nAMT model. Other control-systems models (both AMT and feedback-error learning) were unable to reproduce the...

Topics: DTIC Archive, Davidson, Paul R, CANTERBURY UNIV CHRISTCHURCH (NEW ZEALAND) ELECTRICAL AND...

In this thesis, a 4th order rotational mechanical plant provided by Educational Control Products is modeled from first principles and represented in state-space form. Identification of the state-space parameters was accomplished using the parameter estimation function in Matlab's System Identification Toolbox utilizing experimental input/output data. The identified model was then constructed in Simulink and the accuracy of the identified model parameters was studied. The open loop stability of...

Topics: DTIC Archive, NAVAL POSTGRADUATE SCHOOL MONTEREY CA, *MATHEMATICAL MODELS, THESES, FIRST PRINCIPLES...

This work extends previous research employing 1) dynamical structure functions as a new modeling tool for complex network environments, and 2) the network design cycle as a mechanism for unifying theoretical and applied research. In particular, this work explores a specific application to a wireless mesh network environment and extends the theoretical results to include necessary and sufficient informativity conditions for network reconstruction from input-output data, vulnerability analyses of...

Topics: DTIC Archive, BRIGHAM YOUNG UNIV PROVO UT, *COMPUTER NETWORKS, *WIRELESS LINKS, ALGORITHMS,...

We present the first controller that allows our small hexapod robot, RHex, to descend a wide variety of regular sized, real-world stairs. After selecting one of two sets of trajectories, depending on the slope of the stairs, our open-loop, clock-driven controllers require no further operator input nor task level feedback. Energetics for stair descent is captured via specific resistance values and compared to stair ascent and other behaviors. Even though the algorithms developed and validated in...

Topics: DTIC Archive, Campbell, D, MCGILL RESEARCH CENTRE FOR INTELLIGENT MACHINES MONTREAL (QUEBEC),...

An exact expression for the perturbed sidelobe level of a compresses pulse that has been preprocessed through an adaptive canceller has been derived in Part 1. This exact expressions requires computer assistance to be evaluated. This report derives a rule of thumb expression that is a good approximation for the canceller noise power level that is induced by having a desired signal present in the canceller weight calculation. An expression for the number of independent samples necessary to...

Topics: DTIC Archive, Gerlach, Karl, NAVAL RESEARCH LAB WASHINGTON DC, *ADAPTIVE SYSTEMS, SAMPLING,...

This paper explores modeling the adaptive mechanisms of autonomous agents. The focus is on reflexive interaction as a looping action that creates a self. Imitation and play are adaptive components of reflexive interactions that can provide gradual modifications of the agent's self. Little by little, the autonomous agent reinforces what seems to work and phases out other options through an internal editing process. A performance metrics for reflexive interaction would have to depend on the task...

Topics: DTIC Archive, QUINNIPIAC UNIV HAMDEN CT DEPT OF FINE ARTS, LANGUAGES, AND PHILOSPHY, *INTELLIGENCE,...

Dynamics in locomotion is highly useful, as can be seen in animals. Although dynamic maneuvers are beneficial, only a few engineered systems use them as the design and control are often extremely complicated. This thesis explores a family of dynamic climbing robots which extend robotic dynamic legged locomotion from horizontal motions such as walking and running, to vertical motions such as leaping. Motion of these dynamic robots resembles the motion of an athlete jumping and climbing inside a...

Topics: DTIC Archive, CARNEGIE-MELLON UNIV PITTSBURGH PA ROBOTICS INST, *CLIMBING, *ROBOTS, *DYNAMICS,...

Topics: DTIC Archive, Novoselov,B V, FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH, *SERVOMECHANISMS,...

The intense fluctuating pressures observed in open cavities are extremely detrimental hence the ability to control the flow to minimize them is an important challenge. Many open loop methodologies have proven effective at this for single operating conditions, however they often are detrimental at off design conditions. Closed loop flow control is applicable over a range of flow conditions and is the thrust of many current and past studies. However in order to advance its effectiveness there is...

Topics: DTIC Archive, FLORIDA UNIV GAINESVILLE, *CAVITIES, *TIME DEPENDENCE, *FLOW, *PRESSURE, OPEN LOOP...

The objective of this study is to numerically investigate the fundamental roles that momentum and vorticity injections play in suppressing flow separation over a canonical airfoil. Open-loop control of separated, incompressible flow over a NACA 0012 airfoil at Re = 23,000 is examined through large-eddy simulations. We find that the modification to the flow field can be captured by quantifying both the effects of wall-normal momentum (coefficient of momentum) and wall-normal vorticity (derived...

Topics: DTIC Archive, Taira,Kunihiko, Florida State University Tallahassee, United States, Airfoils,...

Performance results for the sidelobe level of a compressed pulse that has been preprocessed through an adaptive canceller are obtained. The adaptive canceller is implemented using the Sampled Matrix Inversion (SMI) algorithm. Because of finite sampling, The quiescent compressed pulse sidelobe levels are degraded because of the preprocessing of the main channel input data stream (the uncompressed pulse) through an adaptive canceller. If N is the number of input canceller channels (main and...

Topics: DTIC Archive, Gerlach, Karl, NAVAL RESEARCH LAB WASHINGTON DC, *ADAPTIVE SYSTEMS, *PULSE...

This paper presents a pronking controller for our six-legged robot RHex. Development of the controller begins with a passive-dynamics approach, ensuring that the robot is naturally suited to running. Running with flight phase is then achieved using only proprioceptive (joint angle sensing only) feedback for touchdown detection and for tracking fixed joint reference trajectories. Body pitch oscillation is attenuated by means of an open loop leg speed change during stance. The robot achieves...

Topics: DTIC Archive, McMordle, D, MCGILL RESEARCH CENTRE FOR INTELLIGENT MACHINES MONTREAL (QUEBEC),...

The optimal control of stochastic systems is considered. Under various assumptions concerning the information available to the controller, different optimal control rules result. For certain specific problems, the different control schemes are analyzed and compared, and the vast superiority of feedback over open-loop control is demonstrated.

Topics: DTIC Archive, Dreyfus, Stuart E, RAND CORP SANTA MONICA CA, *CONTROL THEORY, *STOCHASTIC CONTROL,...

A small, lightweight microdevice has been developed for activity-dependent stimulation (ADS) and successfully tested for functionality in both anesthetized and ambulatory rats. Further, in semi-chronic experiments in rats with traumatic brain injury (TBI) using this microsystem, an unprecedented, potent effect of ADS on motor performance has been demonstrated, as compared to control rats (injured but no microdevice) and open-loop stimulation (OLS) rats. Specifically, OLS does result in some...

Topics: DTIC Archive, CASE WESTERN RESERVE UNIV CLEVELAND OH, *ADRENAL CORTEX, *BRAIN, *TRAUMATIC BRAIN...

A small, lightweight microdevice has been developed for activity-dependent stimulation (ADS) and successfully tested for functionality in both anesthetized and ambulatory rats. Further, in semi-chronic experiments in rats with TBI using this microsystem, an unprecedented, potent effect of ADS on motor performance has been demonstrated, as compared to control rats (injured but no microdevice) and open-loop stimulation (OLS) rats. Specifically, open-loop stimulation does result in some recovery...

Topics: DTIC Archive, KANSAS UNIV MEDICAL CENTER KANSAS CITY RESEARCH INST, *BRAIN, *REHABILITATION,...

In this paper, we discuss the development and experimental implementation of a nonlinear control design for magnetostrictive transducers operating in hysteretic regimes. The hysteresis and constitutive nonlinearities are characterized using a homogenized energy framework based on energy relations at the lattice level employed in combination with stochastic homogenization techniques that incorporate material and field nonhomogeneities. Using this framework, we employ nonlinear optimal control...

Topics: DTIC Archive, Oates, William S, FLORIDA STATE UNIV TALLAHASSEE DEPT OF MECHANICAL ENGINEERING,...

This thesis presents a new method of decentralized linear, time- invariant control systems synthesis based on the algebraic Riccati equation (ARE). The basic decentralized design guarantees closed-loop stability and a predetermined level of worst-cast disturbance attenuation. Certain modifications of the basic design guarantee the stability and disturbance attenuation to be robust despite plant uncertainty or reliable despite control-component outages. Other modifications guarantee that a...

Topics: DTIC Archive, Veillette, Robert J, ILLINOIS UNIV AT URBANA DEPT OF ELECTRICAL ENGINEERING,...

A control system was designed and developed to deploy, position, and stow a rocket-borne IR telescope. (Author)

Topics: DTIC Archive, Campbell,Thomas J, WENTWORTH INST BOSTON MASS, *INFRARED DETECTORS, *SOUNDING...

RHex is a hexapod with compliant legs and only six actuated degrees of freedom. Its ability to traverse highly fractured and unstable terrain, as well ascend and descend a particular flight of stairs has already been documented. In this paper, we describe an open loop controller that enables our small robot (Length: 51 cm, Width: 20 cm, Height: 12.7 cm. Leg length: 16 cm), to reliably climb a wide range of regular, full-size stairs with no operator input during stair climbing. Experimental data...

Topics: DTIC Archive, Moore, E Z, MCGILL RESEARCH CENTRE FOR INTELLIGENT MACHINES MONTREAL (QUEBEC),...

A hybrid nonlinear optimal control design is experimentally implemented on a ferromagnetic Terfenol-D actuator to illustrate enhanced tracking control at relatively high speed. The control design employs a homogenized energy model to quantify rate-dependent nonlinear and hysteretic ferromagnetic switching behavior. The homogenized energy model is incorporated into a finite-dimensional nonlinear optimal control design to directly compensate for the nonlinear and hysteretic ferromagnetic...

Topics: DTIC Archive, Oates, William S, FLORIDA STATE UNIV TALLAHASSEE DEPT OF MECHANICAL ENGINEERING,...

This dissertation presents optimal and suboptimal procedures to solve inventory control problems that have non-stationary demand and partial information. In each period, the underlying demand distribution may change according to a known Markov process. The problem is characterized as partial information because some parameter of the demand probability distribution is not known with certainty; however, there is a known prior distribution for the unknown parameter. In one case, there is a...

Topics: DTIC Archive, Treharne, James Thomas, AUBURN UNIV AL, *ADAPTIVE CONTROL SYSTEMS, *INVENTORY...

Hysteresis in smart actuators presents a challenge in control of these actuators. A fundamental idea to cope with hysteresis is inverse compensation. But due to the open loop nature of inverse compensation, its performance is susceptible to model uncertainties and to errors introduced by inverse schemes. In this paper we develop a robust control framework for smart actuators by combining inverse control with the iota1 robust control theory. We show that, for both the rate independent hysteresis...

Topics: DTIC Archive, Tan, Xiaobo, MARYLAND UNIV COLLEGE PARK INST FOR SYSTEMS RESEARCH, *ACTUATORS,...

The Nyquist Stability Criterion is generalized to systems where the (open-loop) system has infinite-dimensional input/output spaces and a (possibly) unbounded infinitesimal generator. This is done through use of the perturbation determinant and an extension of the Argument Principle to infinitesimal generators with trace-class resolvent.

Topics: DTIC Archive, Fardad, Makan, CALIFORNIA UNIV SANTA BARBARA DEPT OF MECHANICAL AND ENVIRONMENTAL...

A wide range of dynamical systems from fields as diverse as mechanics, electrical networks and molecular chemistry can be modeled by invariant systems on matrix Lie groups. This paper introduces control systems on matrix Lie groups and studies open-loop tracking and feedback stabilization for these systems in the presence of nonholonomic constraints. Using the concept of approximate inversion, results for drift-free, left-invariant systems on specific matrix Lie groups are presented.

Topics: DTIC Archive, Struemper, H, MARYLAND UNIV COLLEGE PARK DEPT OF ELECTRICAL ENGINEERING,...

This note shows how recent developments in the complex variable analysis of multivariable feedback systems can be used to determine stability with respect to a system parameter. (Author)

Topics: DTIC Archive, Postlethwaite,I, CAMBRIDGE UNIV (ENGLAND) DEPT OF ENGINEERING, *MULTIVARIATE...

This report presents the results of Project HAVE TRIM, An Investigation of Open Loop Flight Control Equations of Motion Used To Predict Flight Control Surface Deflections at Non-Steady State Trim Conditions. The overall test objective was to validate the HAVE TRIM model through comparison of predicted control surface deflections with flight test measured control surface deflections at specified trimmed conditions. The USAF Test Pilot School, Class 03A, conducted 10 flights totaling 18.5 hours...

Topics: DTIC Archive, Miller, Gary D, AIR FORCE FLIGHT TEST CENTER EDWARDS AFB CA, *EQUATIONS OF MOTION,...

Theoretical modelling and experiments were conducted with a goal towards reducing skin friction in a turbulent channel flow. We developed closed loop adaptive feedforward algorithms, as well as actuators and sensor systems for implementation in a turbulent channel. Significant progress was made in theoretical controller development. Actuators were successfully fabricated and characterized, and open loop performance was demonstrated, although more research is required to complete the closed loop...

Topics: DTIC Archive, Breuer, Kenneth, BROWN UNIV PROVIDENCE RI DEPT OF ENGINEERING, *TURBULENT FLOW,...

RHex is a hexapod robot with compliant legs and only six actuated degrees of freedom. Its ability to traverse highly fractured and unstable terrain has already been documented. In this paper, we describe open loop controllers for our small robot to climb and descend regular stairs. The reliability is 90% (9/10) for climbing and 100% (10/10) for descending, based on ten successive trials. Specific resistance, a measure of energy efficiency, during stair climbing is 10.9, and 4.5 during descent.

Topics: DTIC Archive, Moore, E Z, MCGILL RESEARCH CENTRE FOR INTELLIGENT MACHINES MONTREAL (QUEBEC),...

Front-end analysis is described as an iterative process by means of which the requirements of a system may be made progressively more definitive. The importance of information to the process - whether it is obtained through an empirical study or from a generic data base - is stressed. The degree of detail with which system requirements may be specified depends on the level of information available at the time they are formulated. As specificity of system requirements increase, there may be a...

Topics: DTIC Archive, Mulligan,B E, NAVAL TRAINING EQUIPMENT CENTER ORLANDO FL, *PROBLEM SOLVING,...

This paper addresses the development and experimental validation of a model-based, open loop control design for mitigating the frequency-dependent effects of hysteresis in an atomic force microscope (AFM). The models are based on homogenized energy relations which characterize the hysteretic constitutive behavior of the piezoceramic AFM stage. Approximate model inverses are then employed as filters to linearize transducer dynamics for control design. When experimentally implemented in open loop...

Topics: DTIC Archive, Hatch, Andrew, NORTH CAROLINA STATE UNIV AT RALEIGH CENTER FOR RESEARCH IN SCIENTIFIC...

On completing the design of a multivariable feedback system it is always desirable to be able to predict that under certain changes the system will remain stable. In these notes some methods are described for determining the robustness properties of a multivariable feedback system under (1) simultaneous variation of sensor (or actuator) gains; (2) simultaneous nonlinear perturbations of loop gains; and (3) plant parameter uncertainty. (Author)

Topics: DTIC Archive, Postlethwaite,Ian, CAMBRIDGE UNIV (ENGLAND) DEPT OF ENGINEERING, *MULTIVARIATE...

This paper presents the essential features of Horowitz's transparency of QFT and his QFT technique that exemplify the concept of Bridging the Gap, which are the essential aspects of the QFT control system design process.

Topics: DTIC Archive, Houpis, Constantine H, AIR FORCE INST OF TECH WRIGHT-PATTERSONAFB OH, *UNCERTAINTY,...

A comprehensive experimental investigation on the use of microjets for the control of supersonic impinging jets was conducted under this research program. Supersonic impinging jets occur in many applications including in STOVL aircraft where they lead to a highly oscillatory flow with very high unsteady loads on the nearby aircraft structures and the landing surfaces. Prior research has shown that microjets, placed around the main jet periphery, are very effective in reducing the flow...

Topics: DTIC Archive, Alvi, Farrukh, FLORIDA AGRICULTURAL AND MECHANICAL UNIV TALLAHASSEE, *PHYSICAL...

Measured, open loop and closed loop data from the SMART rotor test in the NASA Ames 40- by 80- Foot Wind Tunnel are compared with CAMRAD II calculations. One open loop high-speed case and four closed loop cases are considered. The closed loop cases include three high-speed cases and one low-speed case. Two of these high-speed cases include a 2 deg flap deflection at 5P case and a test maximum-airspeed case. This study follows a recent, open loop correlation effort that used a simple correction...

Topics: DTIC Archive, ELORET CORP MOFFETT FIELD CA NASA AMES RESEARCH CENTER, *CORRELATION, *CLOSED LOOP...

An exact expression for the perturbed range sidelobe level of a compressed pulse that has been preprocessed through an adaptive canceller is derived. This result is a generalization of past research (parts I and II, NRL Reports 9107 and 9309) where the signal was assumed to be completely contained within the canceller's processing batch. In this report, we allow the signal to extend over an arbitrary number of canceller processing batches. A good approximate expression is also obtained for...

Topics: DTIC Archive, Gerlach, Karl, NAVAL RESEARCH LAB WASHINGTON DC, *ADAPTIVE SYSTEMS, *PULSE...

Practical method are presented for making the various calculations required for the analysis of an autopilot and an autopilot-aircraft combination from frequency-response data. Equations are derived for determining the servo-system error voltage for both displacement input signal and displacement plus rate of displacement input signals, the autopilot frequency response for addition of rate of displacement input signal, the servo-system frequency response for a change of gain, and the relation...

Topics: DTIC Archive, Smaus, Louis H, NATIONAL AERONAUTICS AND SPACE ADMINISTRATION MOFFETT FIELD CA AMES...

The prototype digital ride control system (RCS) developed by Maritime Dynamics was installed and tested on the 26-ton XR-1E SES. Open and closed loop tests were conducted. Stability of the digital controller was compared with that of the experimental analog RCS developed for the XR-1D SES. Closed loop test data was used to make RCS performance predictions for the USCG Sea Bird Class SES. A tradeoff study was performed and a candidate RCS configuration was selected for the Sea Bird Class SES. A...

Topics: DTIC Archive, Adams,J D, MARITIME DYNAMICS INC TACOMA WA, *CONTROL SYSTEMS, DIGITAL SYSTEMS, TRADE...

State feedback regulators are derived which have better robustness characteristics than the standard 60 deg phase margin and 50% gain reduction tolerance of standard linear- quadratic regulators. It is also shown how the Lyapunov equation can be used to design high-integrity regulators for open-loop stable systems. (Author)

Topics: DTIC Archive, Molander,Per, LUND INST OF TECH (SWEDEN) DEPT OF AUTOMATIC CONTROL, *REGULATORS,...

A variety of control problems arising from robotics applications can be restated as optimal control problems of minimum-time state transfer in the presence of state-space constraints and constraints of incomplete-state information. The traditional approaches to solving such problems are Pontryagin's Maximum Principle, in the case of open-loop control, and Bellman's Dynamic Programming method.

Topics: DTIC Archive, Johnson, T. L., MASSACHUSETTS INST OF TECH CAMBRIDGE LAB FOR INFORMATION AND DECISION...

This thesis evaluates the usefulness of open air hardware-in-the-loop testing. This evaluation is based upon the comparison of two indoor hardware-in- the-loop facilities to an outdoor hardware-in-the-loop facility. In addition to the comparison of the facilities, this thesis presents feedback from three sources who have hardware-in-the-loop test experience at both indoor and outdoor facilities. Based on the research conducted, the conclusion of this thesis is that the established electronic...

Topics: DTIC Archive, Stepp, Ronald K, NAVAL POSTGRADUATE SCHOOL MONTEREY CA, *ELECTRONIC WARFARE, *OPEN...

In this experiment, the Taita No. 1 centrifugal blood pump was implanted on the calf. The blood pump was driven by constant voltage with the open-loop control method. The pump inflow flow and pump outflow pressure were recorded and analyzed synchronously. According to the status of aortic valve and mitral valve, the cardiac cycle was divided into four stages. The flow in each stage was calculated and an optimal pump control index was obtained. The index suggests an optimal applied voltage of...

Topics: DTIC Archive, Lin, Y H, NATIONAL TAIWAN UNIV TAIPEI DEPT OF ELECTRICAL ENGINEERING, *BLOOD,...

This report includes a discussion of the most significant achievements developed in Russia and the former Soviet Union in the theory of optimal shock isolation. Various mathematical models describing the behavior of an object mounted on a moving base which is subjected to a shock disturbance are presented. Several types of performance criteria for isolation are considered, the most important of which are the peak force transmitted to the body to be isolated and the maximum displacement of the...

Topics: DTIC Archive, Bolotnik, Nikolai, VIRGINIA UNIV CHARLOTTESVILLE DEPT OF MECHANICAL AND AEROSPACE...

Problem solving approaches often find a path from the givens to the unknown or from the unknown to the givens. This study explores those approaches using written protocols of Navy subjects while solving for the numerical value of an unknown from several knowns and a system of equations. For a subset of the items, solutions require subjects to retain expressions with both literals and numerals. Successful and unsuccessful students were similar in their preference to work backward and to use...

Topics: DTIC Archive, Sachar,Jane, RAND CORP SANTA MONICA CA, *PERFORMANCE(HUMAN), *ALGEBRA, *SIMULTANEOUS...

The problem of tracking control in the face of high amplitude dynamic reference signals, hard state and control constraints, and open-loop unstable plants is investigated. Saturation effects mitigation is a current research topic, and a large body of literature exists which addresses this problem. However, with a few notable exceptions, little work has been accomplished which is applicable to the problem of high amplitude dynamic reference signal tracking in the face of hard state and control...

Topics: DTIC Archive, McNamee, Joseph W., AIR FORCE INST OF TECH WRIGHT-PATTERSONAFB OH SCHOOL OF...

The objective of this work was to identify and demonstrate nulling techniques which are rapidly adapting and robust with respect to various types of errors. The principal application of these nulling techniques is to the communications problem which is characterized by frequency-hopped and other broadband signals, and a diversity of non-stationary jammers. Keywords: Jammers; Environmental filters; Electronic warfare open-loop processor; Closed-loop processor; Nulling; Nulling weights; Signal...

Topics: DTIC Archive, Wengrovitz, Michael S, ATLANTIC AEROSPACE ELECTRONICS CORP WALTHAM MA, *ELECTRONIC...

A natural circulation loop with water as the circulating fluid was studied for a range of operation covering two phase flow. Periodic oscillations of the flow rate and fluid temperature occur even with constant heat input and constant cooling water properties for the heat exchangers. Several conclusions concerning the stability of operation are given. Use is made of the theoretical analysis of an open ended system, and an analogue computer. For use in a more detailed numerical analysis, the...

Topics: DTIC Archive, Wissler, Eugene H., MINNESOTA UNIV MINNEAPOLIS, *TEMPERATURE CONTROL, *OPEN LOOP...

This report summarizes, develops, analyzes, and compares MRAS identifiers for each of the three classes: linear time-invariant, linear time-varying, and nonlinear time-invariant systems. Design guidelines are presented as to practical implementation considerations such as identifier stability, computer computational burden, tracking accuracy and noise effects. Results are provided to demonstrate the good accuracy achievable with each of the three classes of MRAS identifiers. (Author)

Topics: DTIC Archive, Colburn,Bruce K, TEXAS A AND M UNIV COLLEGE STATION TELECOMMUNICATION AND CONTROL...