Author: James M. Bielefeld
Publisher:
ISBN:
Category : Stability
Languages : en
Pages : 128
Book Description
Stability Analysis of a General Pulse Width-pulse Frequency Modulated Control System
Author: James M. Bielefeld
Publisher:
ISBN:
Category : Stability
Languages : en
Pages : 128
Book Description
Publisher:
ISBN:
Category : Stability
Languages : en
Pages : 128
Book Description
STABILITY ANALYSIS of PULSE WIDTH MODULATED SYSTEMS
Author: Zelimir Krokar
Publisher:
ISBN: 9781483909936
Category :
Languages : en
Pages : 386
Book Description
This book provides an approach to a basic stability analysis of the Pulse Width Modulated (PWM) Control Systems. It provides a systematic way to a general system solution of such and similar problems. The method described provides the designer with the ability to select system components and predict the system behavior. As a descriptive vehicle, it uses a simple system consisting of a pulse width modulator (PWM) and a linear system section W(s) to connect time and frequency domain via the Laplace transform. After the individual components are studied independently, it proceeds to analyze the system when the feedback loop is closed. The analysis is devoted mostly to symmetrical Pulse Width Modulators; however the Unsymmetrical Modulators are covered as well. The book gives the reader a broader approach to the study of such systems, providing detailed analytical tools for simple and more complex system control configuration. Near the end of the book, a direction is presented for further study of the Frequency Pulse Width Modulated (FPWM) control systems.
Publisher:
ISBN: 9781483909936
Category :
Languages : en
Pages : 386
Book Description
This book provides an approach to a basic stability analysis of the Pulse Width Modulated (PWM) Control Systems. It provides a systematic way to a general system solution of such and similar problems. The method described provides the designer with the ability to select system components and predict the system behavior. As a descriptive vehicle, it uses a simple system consisting of a pulse width modulator (PWM) and a linear system section W(s) to connect time and frequency domain via the Laplace transform. After the individual components are studied independently, it proceeds to analyze the system when the feedback loop is closed. The analysis is devoted mostly to symmetrical Pulse Width Modulators; however the Unsymmetrical Modulators are covered as well. The book gives the reader a broader approach to the study of such systems, providing detailed analytical tools for simple and more complex system control configuration. Near the end of the book, a direction is presented for further study of the Frequency Pulse Width Modulated (FPWM) control systems.
Performance and Stability Analysis of a Digital Pulse Width Modulated Control System
Author: Philippe Dumas
Publisher:
ISBN:
Category : Pulse frequency modulation
Languages : en
Pages : 120
Book Description
Publisher:
ISBN:
Category : Pulse frequency modulation
Languages : en
Pages : 120
Book Description
GENERAL ANALYSIS AND STABILITY STUDIES OF PULSE-WIDTH-MODULATED SYSTEMS.
Manual Control of a Pulse-frequency Modulated Reaction Control
Author: John P. Hornseth
Publisher:
ISBN:
Category :
Languages : en
Pages : 24
Book Description
A manual pulse-frequency modulated reaction control is a control with fixed pulse width, fixed pulse amplitude, and manual control of pulse frequency. For such a control, it is possible to maintain a constant reactive force per pulse for various combinations of pulse widths and pulse amplitudes. The controlled element was a one-dimensional second order system. A semirandom sequence of three step voltages was used to displace a spot on a CRT. Subjects were required to recenter the spot as fast as possible. Manual control performance was tested under three levels (low, middle, high) of control output gain. Three pulse width-pulse amplitude combinations were tested at the low and high control output gain levels and four pulse width-pulse amplitude combinations for the middle control output gain level. Three subjects were tested under all conditions. Performance measures obtained were: integrated absolute error, integrated absolute fuel consumption, and integrated absolute stick motion. The results of this study indicate that (1) changing pulse width and pulse amplitude, but keeping control output gain fixed, does not affect manual performance; but that (2) changing control gain does. (Author).
Publisher:
ISBN:
Category :
Languages : en
Pages : 24
Book Description
A manual pulse-frequency modulated reaction control is a control with fixed pulse width, fixed pulse amplitude, and manual control of pulse frequency. For such a control, it is possible to maintain a constant reactive force per pulse for various combinations of pulse widths and pulse amplitudes. The controlled element was a one-dimensional second order system. A semirandom sequence of three step voltages was used to displace a spot on a CRT. Subjects were required to recenter the spot as fast as possible. Manual control performance was tested under three levels (low, middle, high) of control output gain. Three pulse width-pulse amplitude combinations were tested at the low and high control output gain levels and four pulse width-pulse amplitude combinations for the middle control output gain level. Three subjects were tested under all conditions. Performance measures obtained were: integrated absolute error, integrated absolute fuel consumption, and integrated absolute stick motion. The results of this study indicate that (1) changing pulse width and pulse amplitude, but keeping control output gain fixed, does not affect manual performance; but that (2) changing control gain does. (Author).
Technical Abstract Bulletin
Author: Defense Documentation Center (U.S.)
Publisher:
ISBN:
Category : Military art and science
Languages : en
Pages : 1540
Book Description
Publisher:
ISBN:
Category : Military art and science
Languages : en
Pages : 1540
Book Description
Stability and Oscillations of Nonlinear Pulse-Modulated Systems
Author: Arkadii Kh. Gelig
Publisher: Birkhäuser
ISBN: 9781461272694
Category : Mathematics
Languages : en
Pages : 362
Book Description
There are two main fields of application of pulse-modulated sys tems, communications and control. Communication is not a subject of our concern in this book. Controlling by a pulse-modulated feed attracted our efforts. The peculiarity of this book is that all back the sampled-data systems are considered in continuous time, so no discrete time schemes are presented. And finally, we pay a little at tention to pulse-amplitude modulation which was treated in a vast number of publications. The primary fields of our interest are pulse width, pulse-frequency, and pulse-phase modulated control systems. The study of such systems meets with substantial difficulties. An engineer, who embarks on theoretical investigations of a pulse-mo dulated control, is often embarrassed by the sophisticated mathe matical tools he needs to know. When a mathematician, who looks for practical applications of his mathematical machinery, meets with these systems, he faces a lot of of complicated technical schemes and terms. Probably this is the reason why publications on pulse modu lation are seldom in scientific journals. As for books on this subject (save on amplitude modulation), the significant part of them is in Russian and hardly available for a non-Russian reader.
Publisher: Birkhäuser
ISBN: 9781461272694
Category : Mathematics
Languages : en
Pages : 362
Book Description
There are two main fields of application of pulse-modulated sys tems, communications and control. Communication is not a subject of our concern in this book. Controlling by a pulse-modulated feed attracted our efforts. The peculiarity of this book is that all back the sampled-data systems are considered in continuous time, so no discrete time schemes are presented. And finally, we pay a little at tention to pulse-amplitude modulation which was treated in a vast number of publications. The primary fields of our interest are pulse width, pulse-frequency, and pulse-phase modulated control systems. The study of such systems meets with substantial difficulties. An engineer, who embarks on theoretical investigations of a pulse-mo dulated control, is often embarrassed by the sophisticated mathe matical tools he needs to know. When a mathematician, who looks for practical applications of his mathematical machinery, meets with these systems, he faces a lot of of complicated technical schemes and terms. Probably this is the reason why publications on pulse modu lation are seldom in scientific journals. As for books on this subject (save on amplitude modulation), the significant part of them is in Russian and hardly available for a non-Russian reader.
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.
U.S. Government Research Reports
Stability and Oscillations of Nonlinear Pulse-Modulated Systems
Author: Arkadii Kh Gelig
Publisher:
ISBN: 9781461217619
Category :
Languages : en
Pages : 384
Book Description
Publisher:
ISBN: 9781461217619
Category :
Languages : en
Pages : 384
Book Description