THE DESIGN AND ANALYSIS OF EXPERIMENTS. By Oscar Kempthorne. New York, John Wiley and Sons, Inc., 1952. 631 pp. $8.50. This book by a teacher of statistics (as well as a consultant for \"experimenters\") is a comprehensive study of the philosophical background for the statistical design of experiment. It is necessary to have some facility with algebraic notation and manipulation to be able to use the volume intelligently. The problems are presented from the theoretical point of view, without such practical examples as would be helpful for those not acquainted with mathematics. The mathematical justification for the techniques is given. As a somewhat advanced treatment of the design and analysis of experiments, this volume will be interesting and helpful for many who approach statistics theoretically as well as practically. With emphasis on the \"why,\" and with description given broadly, the author relates the subject matter to the general theory of statistics and to the general problem of experimental inference. MARGARET J. ROBERTSON

The Design and Analysis of Experiments

Fault detection, isolation, and reconfiguration (FDIR) is an important and challenging problem in many engineering applications and continues to be an active area of research in the control community. This paper presents a survey of the various model-based FDIR methods developed in the last decade. In the paper, the FDIR problem is divided into the fault detection and isolation (FDI) step, and the controller reconfiguration step. For FDI, we discuss various model-based techniques to generate residuals that are robust to noise, unknown disturbance, and model uncertainties, as well as various statistical techniques of testing the residuals for abrupt changes (or faults). We then discuss various techniques of implementing reconfigurable control strategy in response to faults.

A Survey of Fault Detection, Isolation, and Reconfiguration Methods

Past, present and future of nonlinear system identification in structural dynamics

Technology developments in structural health monitoring of large-scale bridges

https://people.duke.edu/~hpgavin/SystemID/References/Markovsky+VanHuffel-SP-2007.pdf

Overview of total least-squares methods

The development of power converters has permitted the rise of switched reluctance machines(SRMs), due to their simple and cheap design and of their inherent fault tolerance. However,those machines suffer from torque ripple and noise and vibration issues, which constitute an obstacleto the extension of their application domain. This paper presents the influence of thebandwidth of a current-hysteresis controller on an 8/6 SRM in terms of noise, vibration andharshness. Simulations in AMESim environment and measurements on a 15 kW test bench areperformed in transient state, based on continuous variation of the hysteresis bandwidth. Phasecurrents, acoustic noise and radial vibrations are measured without and with load, allowing forcomparison of hysteresis-band-frequency plots. This transient state approach enables showingthe evolution of a part of the frequency components with hysteresis bandwidth and distinguishingthem from other components linked to speed or to structural behaviour of the motor. Resultsshow that the current chopping by means of a hysteresis controller generates broadband frequenciesin the phase currents that also appear in the vibration and sound pressure wave measurements.As the bandwidth increases, switching-related components are shifted towards lowerfrequencies, resulting in a higher excitation of the main resonance modes of the machine. Due tothe higher current ripple in the case of hard chopping mode, the influence of the bandwidth is ingeneral more important than in soft chopping mode. However, for the same bandwidth the rippleoccurs at much lower frequencies in the latter case and therefore more attention has to bepaid to possible interaction with the resonance frequencies.

Investigation of the Influence of the Current-Hysteresis Bandwidth on Noise and Vibrations of Switched Reluctance Machines

Order tracking by adaptive amplitude demodulation (aad)

Applying system identification to assess the vibro-acoustic behaviour of airplanes

Active noise control systems tend to be designed with a target on sound pressure level reduction. However, the perceived control efficiency for the occupants can be more accurately assessed if psychoacoustic metrics are taken into account. The aim of this paper is to evaluate the effect of an adaptive structural acoustic controller on the sound quality of engine noise in a vehicle mockup. The engine excitation is provided by a sound quality equivalent engine simulator, running on a real-time platform that delivers harmonic excitation in function of the driving condition. The controller targets a certain order to match a predefined profile. The controller performance is evaluated in terms of the tracked order amplitude and Zwicker Loudness.

https://lirias.kuleuven.be/bitstream/123456789/202922/1/08PP167.pdf

Adaptive control schemes for engine sound quality improvement

Orthogonal collocation methods are direct approaches for solving optimal control problems (OCP). A high solution accuracy is achieved with few optimization variables, making it more favorable for embedded and real-time NMPC applications. However, collocation approaches lack a guarantee about the safety of the resulting trajectory as inequality constraints are only set on a finite number of collocation points. In this paper we propose a method to efficiently create a convex safety envelope containing the trajectory such that the solution fully satisfies the OCP constraints. We make use of Bernstein approximations of a polynomial's extrema and span the solution over an orthogonal basis using Legendre polynomials. The tightness of the safety envelope estimation, high accuracy in solving the underlying differential equations, fast rate of convergence and little conservatism are properties of the presented approach making it a suitable method for safe real-time NMPC deployment. We show that our method has comparable computational performance to pseudospectral approaches and can accurately approximate the original OCP up to 9 times more quickly than standard multiple-shooting method in autonomous driving applications, without adding complexity to the formulation.

Herman Van der Auweraer

Papers

Investigation of the Influence of the Current-Hysteresis Bandwidth on Noise and Vibrations of Switched Reluctance Machines

Order tracking by adaptive amplitude demodulation (aad)

Applying system identification to assess the vibro-acoustic behaviour of airplanes

Adaptive control schemes for engine sound quality improvement

Safety Envelope for Orthogonal Collocation Methods in Embedded Optimal Control