Results 11 to 20 of about 556,588 (202)

SIMULATION OF FRACTURE USING A MESH-DEPENDENT FRACTURE CRITERION IN THE DISCRETE ELEMENT METHOD [PDF]

open access: yesFacta Universitatis. Series: Mechanical Engineering, 2018
Recently, Pohrt and Popov have shown that for simulation of adhesive contacts a mesh dependent detachment criterion must be used to obtain the mesh-independent macroscopic behavior of the system.
Andrey Dimaki   +3 more
doaj   +2 more sources

Expansion of Linear and Semi-Linear Systems and the Popov Criterion [PDF]

open access: yes, 1981
In this paper we shall consider the operation of system expansion in the case of linear and semilinear systems. The emphasis here is on stability theory with particular attention being given to an extension of the Popov criterion in Anderson's multivariable form (see Anderson (1965) and Tokumaru and Saito (1965) ).
Banks, S.P
core   +4 more sources

Instability Condition Derivation for Hydraulic AGC System under Pressure Closed-Loop Control

open access: yesShock and Vibration, 2021
In strip rolling, hydraulic automatic gauge control (HAGC) system is the key element to guarantee the precision of strip gauge. The stability of the kernel pressure closed loop (PCL) in the HAGC system plays an essential role in guaranteeing the rolling ...
Yong Zhu   +6 more
doaj   +1 more source

Applications of the Multivariable Popov Criterion† [PDF]

open access: yesInternational Journal of Control, 1967
ABSTRACT Two classes of systems are considered for the application of the multivariable Popov criterion. The first is obtained from a linear, finite-dimensional system with a state feedback law derived from a quadratic loss function minimization problem.
J. B. MOORE, B. D. O. ANDERSON
openaire   +1 more source

TRIPLE NONLINEAR HYPERBOLIC PID WITH STATIC FRICTION COMPENSATION FOR PRECISE POSITIONING OF A SERVO PNEUMATIC ACTUATOR

open access: yesInternational Islamic University Malaysia Engineering Journal, 2023
Accurate and precise positioning control is critical in designing a positioning servo pneumatic system. The internal friction force of the pneumatic is one of the disturbances that make it challenging to achieve accurate and precise positioning. Dynamic
Khairun Najmi Kamaludin   +6 more
doaj   +1 more source

Shifted Popov Criterion

open access: yesTransactions of the Institute of Systems, Control and Information Engineers, 1994
In this paper, a new stability criterion for nonlinear feedback systems which include a nonlinearity consisting of the main term and the deviation term is presented. The main term is assumed to be time-invariant and to depend only upon the output of the linear part.
FURUTANI, Eiko   +2 more
openaire   +2 more sources

Social space as a condition of memory in the development of human activity

open access: yesОсвітній дискурс, 2020
Urgency of the research. is related to the need to study the species division and classification of the phenomenon of social space, which defines the demarcation in the understanding of the formation of different types of space, its modalities, as a rule,
Oleg Maltsev
doaj   +1 more source

Contribution to stability analysis of nonlinear control systems [PDF]

open access: yesActa Montanistica Slovaca, 2003
The Popov criterion for the stability of nonlinear control systems is considered. The Popov criterion gives sufficient conditions for stability of nonlinear systems in the frequency domain.
Švarc Ivan
doaj  

About intuition mechanisms in the context of human activity

open access: yesОсвітній дискурс, 2020
Urgency of the research. The following article represents a research of rational and irrational dialectic contradiction, activity development sources, identification of the field of mechanisms of an intuition in its action, as well as categorial ...
Oleg Maltsev
doaj   +1 more source

An Extension of Popov Criterion to Multivariable Time-Varying Nonlinear Systems. Application to Criterion for Existence of Stable Limit Cycles [PDF]

open access: yes, 1998
Projet SOSSOThis report deals with sufficient conditions for absolute stability of multivariable control systems. The proposed conditions extend in a simple way the classical Popov criterion to time-varying memoryless nonlinearities.
Krasnosel'Skii, Alexander M.   +1 more
core   +1 more source

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