Author: Winston L. NelsonPublisher:
ISBN:
Category : Pulse-duration modulation
Languages : en
Pages : 136
Book Description
Pulse Width Modulated Relay Control of Systems Subject to Sampled Data
Author: Winston L. NelsonPublisher:
ISBN:
Category : Pulse-duration modulation
Languages : en
Pages : 136
Book Description
AFOSR.
Author: United States. Air Force. Office of Scientific ResearchPublisher:
ISBN:
Category : Research
Languages : en
Pages : 718
Book Description
Stability Study of Pulse-width Modulated and Nonlinear Sampled-data Systems
Author: Toshimitsu NishimuraPublisher:
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.
NASA SP.
Author: Analysis and Design of a Pulse-width-modulated Control System
Author: Craig Allen DenisonPublisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 226
Book Description
An Experimental Study of Pulse Width-modulated Sampled-feedback Control Systems
Author: Noorudin Abdulla BillawalaPublisher:
ISBN:
Category : Pulse techniques (Electronics)
Languages : en
Pages : 170
Book Description
Optimal Time Control of Some Pulse-width-modulated Sampled-data Systems
Author: Elijah PolakPublisher:
ISBN:
Category : Feedback control systems
Languages : en
Pages : 222
Book Description
The minimal time control problem for some pulsewidth-modulated-sampled-data (PWM) systems with second order plants is treated. Both linear and non-linear plants are considered; all having one thing in common: the optimal switching locus (OST) for a continuous relay system with the same plants is a monotonic curve in the phase plane. First it is shown how, by a reverse time mapping, it is possible to associate systematically with each initial state a finite canonical sequence which specifies the optimal PWM control over the entire transient process during which the state is taken to the origin. Then it is shown how, given an arbitrary initial state its associated canonical sequence can be constructed on the basis of the observed value of the state. A brief description of an electromechanical computer capable of implementing minimal time control for some of the systems considered is also given. (Author).
Pulse Width Control of Sampled Data Systems
Author: Winston L. NelsonPublisher:
ISBN:
Category : Data
Languages : en
Pages : 298
Book Description
U.S. Government Research Reports
Author: Space Communications: Modulation and channels
Author: Louise C. BickfordPublisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 496
Book Description