3,382 Hits in 10.4 sec

Design of Suboptimal PWM Control Systems

Hiroki SAITO, Mitsuru TERAO
1973 Transactions of the Society of Instrument and Control Engineers  
This paper presents a design method for suboptimal PWM (pulse-width-modulated) control systems which can nearly minimize a quadratic performance index. The suboptimal PWM control  ...  Nishimura: Stability Study of Pulse-Width-Modulated Feedback Systems, J. 80/86 (1964) 8) G.J. Murphy & S.H.  ...  Skoog: On the Stability of Pulse-Width- Modulated Feedback Systems, IEEE Trans. on Automatic Control, AC-13, 532/538 (1968) 10) E.  ... 
doi:10.9746/sicetr1965.9.64 fatcat:3cqlddmtnjbajels2nfbeascfy

Page 81 of Journal of Basic Engineering Vol. 83, Issue 1 [page]

1961 Journal of Basic Engineering  
can be extended to pulse-width modulated systems or equivalently to feedback systems employing magnetic ampli- fiers or other nonlinear triggering device as part of the loop.  ...  The authors’ investigations of periodic oscillations could be easily applied to such pulse-width modulated feedback systems.  ... 

Closure to "Discussion of 'Investigation of Periodic Modes of Sampled-Data Control Systems Containing a Saturating Element'" (1961, ASME J. Basic Eng., 83, p. 81)

W. E. Meserve, H. C. Torng
1961 Journal of Basic Engineering  
can be extended to pulse-width modulated systems or equivalently to feedback systems employing magnetic ampli- fiers or other nonlinear triggering device as part of the loop.  ...  The authors’ investigations of periodic oscillations could be easily applied to such pulse-width modulated feedback systems.  ... 
doi:10.1115/1.3658895 fatcat:bkm5kk4mfrerpc2nu75gixw3tu

Pulse-modulated control synthesis for a flexible spacecraft

1990 Journal of Guidance Control and Dynamics  
nonlinear control analysis and design of a flexible spacecraft equipped with pulse-modulated reaction jets.  ...  . control torque command t pulse on-off command Pulse-Width Pulse-Frequency Modulator The pulse-width pulse-frequency (PWPF) modulator has been used in the control systems of such spacecraft as the Agena  ... 
doi:10.2514/3.20574 fatcat:wp3xnp4htrfq3b76ki2mc6qwr4

Robust Control of the Knee Joint Angle of Paraplegic Patients considering Norm-Bounded Uncertainties

Nilson Moutinho dos Santos, Ruberlei Gaino, Márcio Roberto Covacic, Marcelo Carvalho Minhoto Teixeira, Aparecido Augusto de Carvalho, Edvaldo Assunção, Rodrigo Cardim, Marcelo Augusto Assunção Sanches
2015 Mathematical Problems in Engineering  
A state-space representation of the knee joint model of the paraplegic patient with its nonlinearity is also demonstrated.  ...  The use of linear matrix inequalities (LMIs) in control systems with norm-bounded uncertainties for asymptotic stability is analyzed. The model was simulated in the Matlab environment.  ...  This allows the optimization of the neurostimulator pulse width with consequent reduction of muscle fatigue.  ... 
doi:10.1155/2015/736246 fatcat:x7gn4koxgfb4zfwgo2kjwisvha

Stability Analysis of Pulse-Width-Modulated Feedback Systems with Time-Varying Delays

Zhong Zhang, Huahui Han, Qiling Zhao, Lixia Ye
2014 Mathematical Problems in Engineering  
The stability problem of pulse-width-modulated feedback systems with time-varying delays and stochastic perturbations is studied.  ...  With the help of an improved functional construction method, we establish a new Lyapunov-Krasovskii functional and derive several stability criteria aboutpth moment exponential stability.  ...  Conflict of Interests The authors declare that there is no conflict of interests regarding the publication of this paper.  ... 
doi:10.1155/2014/686389 fatcat:zgly4zfapjg4ppy6qmo6ajy55y

Page 104 of Chemical Engineering Progress Vol. 57, Issue 5 [page]

1961 Chemical Engineering Progress  
Rekasius AFTERNOON SESSION SPECIAL TOPICS IN CONTROL On Periodic Modes of Oscillations in Pulse- Width-Modulated Feedback Systems, E. I. Jury and T.  ...  Leondes; Optimal Con- trol Methods for On-Off Sampling Systems, W. L. Nelson; Minimum Time Control of Second-Order Pulse-Width-Modulated-Sampled Data-Systems, E. Polak AEROSPACE VEHICLE CONTROL I!  ... 

A Wiener Model Based Closed Loop FES for Positional Control During Wrist Flexion

S. J., Mahendra, Vishwanath Talasila, Abhilash G. Dutt
2021 North atlantic university union: International Journal of Circuits, Systems and Signal Processing  
First, a Wiener model describing the response of the wrist flexor to pulse width modulated stimulation was identified for two healthy volunteers.  ...  However, existing open-loop clinical FES systems are not adequately equipped to compensate for the nonlinear, time-varying behaviour of the muscles.  ...  It consistis of a negative feedback loop, that enables a part of the y to be fedback to maintain the stability.  ... 
doi:10.46300/9106.2021.15.91 fatcat:bhlletdjwzdnfgrldbyge4wgrm

On an Application of the Absolute Stability Theory to Sampled-Data Stabilization

Alexander N. Churilov
2018 Mathematical Problems in Engineering  
A nonlinear Lur'e-type plant with a sector bound nonlinearity is considered. The plant is stabilized by a discrete-time feedback signal with a nonperiodic uncertain sampling.  ...  The linear matrix inequality (LMI) conditions for the stability of the closed-loop system are obtained.  ...  Yakubovich in connection with the study of pulse-width modulated systems (a special class of sampled-data systems) [11] .  ... 
doi:10.1155/2018/3169609 fatcat:bjoz6b4ai5gqtfguqkjmmwiimm

Page 2547 of Mathematical Reviews Vol. 57, Issue 6 [page]

1979 Mathematical Reviews  
Authors’ summary: “We examine a sampled-data system contain- ing one or more sampled-data elements that perform pulse-width modulation of the first or second kind.  ...  The present procedure differs significantly from existing methods concerned with the analysis of systems having several nonlinearities.  ... 

Pulse width modulated control of robotic manipulators

1993 International Journal of Systems Science  
K ey w o rd s: Pulse-Width-Modulation, Robotic Manipulators, Nonlinear Systems, Vari able Structure Systems.  ...  A robust on-off switching control strategy based on a pulse-width-modulation (PWM) feedback scheme is proposed for the joint torques.  ...  In this section a technique is developed for the analysis of nonlinear systems regu lated by means of Pulse W idth Modulating the actuators.  ... 
doi:10.1080/00207729308949572 fatcat:pwgctlcq5fd7fl5lpbkeocqmti

Optimal On-Off Attitude Control for the Brazilian Multimission Platform Satellite

Gilberto Arantes, Luiz S. Martins-Filho, Adrielle C. Santana
2009 Mathematical Problems in Engineering  
This work considers the Pulse-Width Pulse-Frequency (PWPF) modulator which is composed of a Schmidt trigger, a first-order filter, and a feedback loop.  ...  The three-axis attitude control systems are activated in pulse mode. Consequently, a modulation of the torque command is compelling in order to avoid high nonlinear control action.  ...  Acknowledgments The authors acknowledge the support of Conselho Nacional de Desenvolvimento Cientifico e Tecnológico-CNPq, Coordenação de Aperfeiçoamento de Pessoal de Nivel Superior CAPES Brazil , and  ... 
doi:10.1155/2009/750945 fatcat:5ijaxsskh5gt3py3yu3xg7iota

Page 604 of Mathematical Reviews Vol. , Issue 95a [page]

1995 Mathematical Reviews  
Sauro Longhi (I-ANC-EL; Ancona) 95a:93053 93B52 93C57 Khayatian, Alireza (IR-SHIR-EE; Shiraz); Taylor, David G. (1-GAIT-CG; Atlanta, GA) Feedback control of linear systems by multirate pulse-width modulation  ...  Summary: “In this note, sampled-data methods for modeling and control design of pulse-width modulated systems are examined. Both single-rate and multirate approaches are considered.  ... 

Page 347 of Mathematical Reviews Vol. 57, Issue 1 [page]

1979 Mathematical Reviews  
Pulse-width modulated (PWM) control systems are studied in which the pulse-width modulator is assumed to be part of a feedback system also containing an arbitrary-order stable linear portion with distinct  ...  For analysis purposes the system is considered as an equivalent discrete-time nonlinear system with multiple nonlinearities.  ... 

Moment Stability of the Critical Case of PWM Feedback Systems with Stochastic Perturbations

Zhong Zhang, Lixia Ye
2012 Abstract and Applied Analysis  
This paper further studies the moment stability of pulse-width-modulated (PWM) feedback system which is subjected to multiplicative and additive random disturbance modeled by the derivative of Wiener process  ...  We establish several globally asymptotically stability criteria for such PWM feedback systems and then propose an algorithm to calculate the stability bound effectively.  ...  In 20 , the authors established new Lyapunov and Lagrange stability results for pulse-width-modulated PWM feedback systems subjected to random disturbance.  ... 
doi:10.1155/2012/736408 fatcat:osofj3ubffeavazup7fwvqm2si
« Previous Showing results 1 — 15 out of 3,382 results