Author: California. University. Graduate Division
Publisher:
ISBN:
Category :
Languages : en
Pages : 1098
Book Description
Summary of the Dissertation[s] Submitted in Partial Satisfaction of the Requirements for the Degree of Doctor of Philosophy
Author: California. University. Graduate Division
Publisher:
ISBN:
Category :
Languages : en
Pages : 1098
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 1098
Book Description
Stability Study of Pulse-width Modulated and Nonlinear Sampled-data Systems
Author: Toshimitsu Nishimura
Publisher:
ISBN:
Category : Discrete-time systems
Languages : en
Pages : 250
Book Description
The fundamental equation that describes limit cycles in nonlinear sampled-data systems was derived. The equivalence of limit cycles with finite pulsed systems having a periodically varying sampling-rate was observed, and the methods of analysis applied to the latter were extended to obtain these limit cycles with the aid of final value theorem. This fundamental equation is modified and simplified under certain assumptions as it can be applied to systems both with and without integrators. The limitation on the longest period of saturated and unsaturated oscillation is investigated and the critical gain for their existence is derived, starting from the modified fundamental equation. Also, the stability of limit cycles and the equilibrium point is considered, based on Neace's method. Various kinds of non-linearities, namely, pulse-width modulation, relay saturating amplifier with linear zone and quantized level amplifier are discussed. Self-excited oscillations are mainly examined, as well as the possible existence and stability of limit cycles, however, the method can be extended to forced oscillations.
Publisher:
ISBN:
Category : Discrete-time systems
Languages : en
Pages : 250
Book Description
The fundamental equation that describes limit cycles in nonlinear sampled-data systems was derived. The equivalence of limit cycles with finite pulsed systems having a periodically varying sampling-rate was observed, and the methods of analysis applied to the latter were extended to obtain these limit cycles with the aid of final value theorem. This fundamental equation is modified and simplified under certain assumptions as it can be applied to systems both with and without integrators. The limitation on the longest period of saturated and unsaturated oscillation is investigated and the critical gain for their existence is derived, starting from the modified fundamental equation. Also, the stability of limit cycles and the equilibrium point is considered, based on Neace's method. Various kinds of non-linearities, namely, pulse-width modulation, relay saturating amplifier with linear zone and quantized level amplifier are discussed. Self-excited oscillations are mainly examined, as well as the possible existence and stability of limit cycles, however, the method can be extended to forced oscillations.
The Analysis of Nonlinear Feedback Sampled-data Systems
Author: Mangalore Anantha Pai
Publisher:
ISBN:
Category : Data transmission systems
Languages : en
Pages : 226
Book Description
Various techniques are available for the analysis of nonlinear sampled-data systems. Most of these methods use either the phase plane approach or the describing function technique. Since the performance of such a system is described, at sampling instants, by means of a difference equation, an approach based on the difference equation would seem to be both natural and direct. The principle of complex convolution for a transform is explained and its geometrical interpretation is given. It is shown how the application of the convolution transform is both direct and simple with respect to solving nonlinear difference equations when the equation is given in scalar form. Dependence of the convergence of the solution on the initial value and the degree of nonlinearity is pointed out. It is concluded that for difference equations of second order and higher, this method involves too much laborious computation to justify its use. A simple method is presented for examining free oscillations in a sampled-data system containing either relay or a saturating amplifier. In addition, a certain analytical technique, analogous to that for differential equations, is developed to investigate the stability of forced oscillations for certain types of nonlinear difference equations. (Author).
Publisher:
ISBN:
Category : Data transmission systems
Languages : en
Pages : 226
Book Description
Various techniques are available for the analysis of nonlinear sampled-data systems. Most of these methods use either the phase plane approach or the describing function technique. Since the performance of such a system is described, at sampling instants, by means of a difference equation, an approach based on the difference equation would seem to be both natural and direct. The principle of complex convolution for a transform is explained and its geometrical interpretation is given. It is shown how the application of the convolution transform is both direct and simple with respect to solving nonlinear difference equations when the equation is given in scalar form. Dependence of the convergence of the solution on the initial value and the degree of nonlinearity is pointed out. It is concluded that for difference equations of second order and higher, this method involves too much laborious computation to justify its use. A simple method is presented for examining free oscillations in a sampled-data system containing either relay or a saturating amplifier. In addition, a certain analytical technique, analogous to that for differential equations, is developed to investigate the stability of forced oscillations for certain types of nonlinear difference equations. (Author).
Seismic Behaviour of Ground and Geotechnical Structures: Special Volume of TC 4
Author: Pedro S. Seco e Pinto
Publisher: CRC Press
ISBN: 1000443620
Category : Technology & Engineering
Languages : en
Pages : 414
Book Description
Containing papers from the Special Technical Session on Earthquake Geotechnical Engineering, this volume includes coverage of: zonation maps; liquefaction; side effects; ground motions; slope instability; seismic behaviour of slopes; dikes and dams; and warning systems.
Publisher: CRC Press
ISBN: 1000443620
Category : Technology & Engineering
Languages : en
Pages : 414
Book Description
Containing papers from the Special Technical Session on Earthquake Geotechnical Engineering, this volume includes coverage of: zonation maps; liquefaction; side effects; ground motions; slope instability; seismic behaviour of slopes; dikes and dams; and warning systems.
Some Short-lived Alpha Emitters in the Neighorhood of Polonium 211
Author: Fred Noel Spiess
Publisher:
ISBN:
Category : Bismuth
Languages : en
Pages : 160
Book Description
Publisher:
ISBN:
Category : Bismuth
Languages : en
Pages : 160
Book Description
Information on Scientific Documentation
Author: United States. Clearinghouse of Federal and Technical Information
Publisher:
ISBN:
Category : Information science
Languages : en
Pages : 56
Book Description
Publisher:
ISBN:
Category : Information science
Languages : en
Pages : 56
Book Description
Information on Scientific Documentation
Author:
Publisher:
ISBN:
Category : Information science
Languages : en
Pages : 54
Book Description
Publisher:
ISBN:
Category : Information science
Languages : en
Pages : 54
Book Description
Dam Maintenance and Rehabilitation
Author: M. Cabrera
Publisher: Routledge
ISBN: 1351456741
Category : Technology & Engineering
Languages : en
Pages : 993
Book Description
During the life of a dam, changes in safety standards, legislation and land use will inevitably occur, and functional deterioration may also appear. To meet these challenges, these Proceedings from a panel of international experts assess, define and re-evaluate the design criteria for the construction of dams and the many attendant issues in on-going maintenance and management. Authors include international specialists: academics, professionals and those in local government, utilities and suppliers. Practitioners from these same fields will find the book a useful tool in acquiring a comprehensive knowledge of managing and retrofitting dams, so that they can continue to meet society's needs.
Publisher: Routledge
ISBN: 1351456741
Category : Technology & Engineering
Languages : en
Pages : 993
Book Description
During the life of a dam, changes in safety standards, legislation and land use will inevitably occur, and functional deterioration may also appear. To meet these challenges, these Proceedings from a panel of international experts assess, define and re-evaluate the design criteria for the construction of dams and the many attendant issues in on-going maintenance and management. Authors include international specialists: academics, professionals and those in local government, utilities and suppliers. Practitioners from these same fields will find the book a useful tool in acquiring a comprehensive knowledge of managing and retrofitting dams, so that they can continue to meet society's needs.
German Interests in Mexico in the Period of Porfirio Díaz
Author: Warren Schiff
Publisher:
ISBN:
Category : Germans
Languages : en
Pages : 474
Book Description
Publisher:
ISBN:
Category : Germans
Languages : en
Pages : 474
Book Description
Historical and Economic Geography of the Southwest Peninsula of Haiti
Author: John M. Street
Publisher:
ISBN:
Category : Haiti
Languages : en
Pages : 984
Book Description
Publisher:
ISBN:
Category : Haiti
Languages : en
Pages : 984
Book Description