Adaptive linear estimation is a powerful technique for retrieving information from noise corrupted signals with unknown, time-varying, signal and noise statistics. it has been rarely applied to communication applications because of the prohibitive complexity and cost of the required digital signal… More

Significant productivity gains can be made in the aerospace industries and many associated industries if computer- aided design (cad) tools are developed which can manage the large amounts of data involved in generation, manipulation, validation and revision of models of distributed parameter… More

Automatic control and analysis, system identification and system analysis for complex dynamical systems are engineering tasks which can be greatly enhanced through automative interactive (computer aided) design methods. such techniques are largely unavailable in aerospace, mechanical and electrical… More

This proposal addresses the theoretical issues involved in obtaining quantitative robustness measures for adaptive systems. present adaptive theory requires that the plant and controller are linear and finite dimensional, with known order such that control objectives are exactly obtained. such… More

Real-time flutter prediction including close modes can be effectively estimated from turbulence or on-board excitationwith an extended kalman filter(ekf) approach. the the physically based model form enables prediction of the damping rate as well as damping giving a time to unstabilityestimate with… More

Traditional approaches to the feedback control of robots have depended exclusively on open loop trajectory commands. higher level decision making functions will be necessary requiring the application of artificial intelligence (ai) techniques. the proposed research aims at the interface between… More

Automatic control design and analysis, modeling, simulation, and optimization tasks can be greatly enhanced through interactive, computer-aided engineering (cae) tools. such tools have been largely unavailable in aerospace, mechanical, process control and vehicle design industries, where large… More

Physical layout of submunitions in missiles and weapons in aircraft is currently done by trail and error. optimization-based layout tools could help to automate that process, thereby improving mission performance of the missiles or aircraft as well as the productivity of the designer. the overall… More

The objective of the present proposal is the development of some mathematical and computational tools that are appropriate to the next generation of cad (computer-aided design) environments. these cad packages will be radically different than the present analysis packages in that they will truly be… More

Little has been done to control robots in an intelligent manner which truly involves feedback trajectory control laws. it will not be possible to achieve this for every subtask, but where possible, dramatic performance improvements will be achieved. heuristic rulebased approaches will be coherently… More

Nasa is strongly committed to the automation of aeronauticalflight. an important part of this automation is fault diagnosis and self-repairing control which will clearly require real-time expert systems. addressing this problem in the monitoring of flight tests as well as normal aircraftoperation,… More

Development of a nonlinear optimal guidance algorithm for commandguided or homing projectiles that use discrete, impulsive control is proposed. the nonlinear effects of discrete, impulsive control will be explicity recognized in the algorithm using statistic linearization theory, and control will be… More

The objective of this proposal is to perform numerical optimization of hypersonic body configurations applicable tosingle-stage-to-orbit aerospace plane configurations. formal optimization of high-speed vehicle configurations in terms of minimizing some cost function has been limited to simple… More

Development of a new and revolutionary autopilot design methodology is proposed that will be simple to use and provides unprecedented levels of robutness and performance. the proposed autopilot design methodology is based upon feedback linearization, wherein time-domain plant inversion is… More

Advanced gun pointing and stabilization systems for both rotorcraft and fighting vehicle based weapons require the integration of complex target lead prediction algorithms, nonlinear adaptive strategies, and fault-tolerant use of multi-sensor suites including imv's, distributed accelerometers,… More

The objective of the present proposal is the development of efficient techniques for system identification and adaptive control of large space structures (lss). many of the envisioned future space missions will impose stringent performance demands on tracking accuracy, response time, andactive… More

Addition of tvc could easily double the cost of sounding rockets unless design features that limit cost growth are incorporated. also, the design of the tvc subsystem must be modular and self-contained so that the device can be configured for installation on 13 or more sounding rocket boosters.… More

Many envisioned missions for large-space-structures (lss) must satisfy stringent performance demands, and hence, will require some combination of active and passive control. it is proposed that these performance requirementsmay be more affectively achieved by integrating the structural design with… More

The principal objective of phase i is development of methods for obtaining process models from in-situ and postmortem measurements that can be used for either quality control or feedback control. a novel feature of this approach is to identify the process by using the hidden markov model (hmm),… More

The objective of the present proposal is the development of some mathematical and computational tools that are appropriate to the next generation of cacsd (computer aided control system design) environments. these future cacsd packages will be radically different from the present packages in that… More

The phase i technical objectives are: (1) to further develop the convex optimization approach to controller design for process control applications, (2) investigate features and functionality of new graphical cace tools that are appropriate for the process control industry, and a manufacturing… More

Integrated systems inc. (isi) and industrial solid propulsion (isp) have jointly defined a concept for valveless solid-propellant divert control of kinetic energy projectiles. isp and consultant dr. bob giesler evolved the multipulse propellant grain and dual-ended igniter design out of isp's model… More

Modeling of semiconductor equipment is a prerequisite for advanced sensor-based real-time process control. Models for control design differ from those used for studying the detailed physics of these systems. Integrated Systems, Inc. (ISI) proposes to investigate several different modeling approaches… More

The objective of this proposal is to develop robust nonlinear control design methods based on available measurements and associated computational tools with emphasis on feedback linearizable systems. A mod-follower scheme is proposed as a design method that utilizes available measurements. … More

Concurrent engineering is the simultaneous design of process and the control system to improve equipment development. Integrated Systems Inc. (ISI) proposes to create a software design tool for integration of a high fidelity simulation and model- based process control algorithms for semi-conductor… More