Aeronautical Engineering: A special bibliography with indexes, supplement 62

This bibliography lists 306 reports, articles, and other documents introduced into the NASA scientific and technical information system in September 1975

Aeronautical Engineering: A special bibliography with indexes, supplement 72, July 1976

This bibliography lists 184 reports, articles, and other documents introduced into the NASA scientific and technical information system in June 1976

Aeronautical Engineering: A special bibliography with indexes, supplement 90

This bibliography lists 351 reports, articles, and other documents introduced into the NASA scientific and technical information system in November 1977

The development of a power system simulator using multiple microprocessors

Imperial Users onl

DigiBuzz-VTT – Towards digital twin’s concrete commercial exploitation

The DigiBuzz-VTT project, a part of the DigiBuzz common effort, focused on the applications of digital twins in manufacturing industry ecosystems. The DigiBuzz-VTT project had two main focuses, 1) functional digital twins, or simulation-based digital twins, of machines and machine systems and their applications, and 2) the life cycle management of digital twins (the digital part of the twin), emphasising data modelling and data management. These themes were studied from the technical and from the business point of views. The detailed research topics were:• Business opportunities and added value of digital twins for manufacturing industry• Data-based digital twins, use of machine learning for feature recognition• The status of standardisation for the lifecycle data management of digital twins, means for preserving model data• Hybrid modelling with digital twins, combination of experimental and simulation data• The optimisation of the measurement points location, method development• The use of Kalman filters in estimating simulation data correlation with measured data• The status of Industrial Internet of Things (IIoT) for digital twinsThis report summarises the implementation of the DigiBuzz-VTT project and lists the main deliverables of the project. The project produced several scientific articles and research reports, which report the research results in detail

Recent Advances in Robust Control

Robust control has been a topic of active research in the last three decades culminating in H_2/H_\infty and \mu design methods followed by research on parametric robustness, initially motivated by Kharitonov's theorem, the extension to non-linear time delay systems, and other more recent methods. The two volumes of Recent Advances in Robust Control give a selective overview of recent theoretical developments and present selected application examples. The volumes comprise 39 contributions covering various theoretical aspects as well as different application areas. The first volume covers selected problems in the theory of robust control and its application to robotic and electromechanical systems. The second volume is dedicated to special topics in robust control and problem specific solutions. Recent Advances in Robust Control will be a valuable reference for those interested in the recent theoretical advances and for researchers working in the broad field of robotics and mechatronics

Power System Stability Studies Using Matlab

The stability of an interconnected power system is its ability to return to normal or stable operation after having been subjected to some form of disturbance. With interconnected systems continually growing in size and extending over vast geographical regions, it is becoming increasingly more difficult to maintain synchronism between various parts of the power system. • In our project we have studied the various types of stability- steady state stability, transient state stability and the swing equation and its solution using numerical methods using MATLAB and Simulink . • We have presented the solution of swing equation for transient stability analysis using three different methods – Point-by-Point method, Modified Euler method and Runge-Kutta method. • Modern power systems have many interconnected generating stations, each with several generators and many loads. So our study is not limited to one-machine system but we have also studied multi-machine stability. • We study the small-signal performance of a machine connected to a large system through transmission lines. We gradually increase the model detail by accounting for the effects of the dynamics of the field circuit. We have analysed the small-signal performance using eigen value analysis. • Further a more detailed transient stability analysis is done whereby the classical model is slightly improved upon by taking into account the effect of damping towards transient stability response. Characteristics of the various components of a power system during normal operating conditions and during disturbances have been examined, and effects on the overall system performance are analyzed

Aeronautical engineering: A continuing bibliography with indexes, supplement 100

This bibliography lists 295 reports, articles, and other documents introduced into the NASA Scientific and Technical Information System in August 1978

Small business innovation research. Abstracts of completed 1987 phase 1 projects

Non-proprietary summaries of Phase 1 Small Business Innovation Research (SBIR) projects supported by NASA in the 1987 program year are given. Work in the areas of aeronautical propulsion, aerodynamics, acoustics, aircraft systems, materials and structures, teleoperators and robotics, computer sciences, information systems, spacecraft systems, spacecraft power supplies, spacecraft propulsion, bioastronautics, satellite communication, and space processing are covered

Aeronautical Engineering: A special bibliography with indexes, supplement 56

This bibliography lists 439 reports, articles, and other documents introduced into the NASA scientific and technical information system in March 1975