scholarly journals Structural and parametric synthesis of the control system of the unobserved output for the object with distributed parameters

2021 ◽  
Vol 29 (1) ◽  
pp. 58-72
Author(s):  
Aleksandr A. Tychinin ◽  
Yulia A. Tychinina ◽  
Dmitry A. Ragazin
Keyword(s):  
Control System ◽  
Transfer Function ◽  
Dynamic Properties ◽  
Parametric Instability ◽  
Chain Structure ◽  
Parametric Synthesis ◽  
Object Control ◽  
Convection Oven ◽  
Distributed Parameters ◽  
A Chain

Method of synthesis of a control system for the object with the distributed parametres, providing compensation of dynamic properties of the object and giving to it of properties of standard model of a set. The system possesses the property of an adaptability to parametrical interference of the object. Control along the unobservable coordinate of the object is implemented by synthesizing a chain structure that implements a transfer function close to the inverse transfer function of the object. Weak sensitivity to parametric instability is provided by solving the inverse problem of dynamics. As an example, the heating of a massive billet in a convection oven is considered.

The Control of the Descent Submersible in the Confused Sea Environment

2014 ◽  
Vol 536-537 ◽  
pp. 1200-1206 ◽  
Author(s):  
Tatiana Al. Ezangina ◽  
Sergey An. Gayvoronskiy
Keyword(s):  
Control System ◽  
Dynamic Properties ◽  
Digital Simulation ◽  
Control Loop ◽  
Parametric Synthesis ◽  
Integral Action ◽  
Quality Rating ◽  
Coefficient Method

To damp the vertical oscillations of the descent submersible caused by dusting the control system utilizing a shock-absorbing hoist located on the submersible was developed. The robust proportional-plus-integral action controller was included in the control loop to ensure the acceptable dynamic properties of the system by the interval variations of the module mass and the rope length. The parametric synthesis of the controller was carried out on the basis of the robust expansion of the coefficient method of the quality rating estimation. The system operability was confirmed by the results of the digital simulation.

Algorithms structural and parametric synthesis of remote control and diagnostics systems of mobile measuring points

2018 ◽  
pp. 60-65
Author(s):  
A. I. Tatarinov
Keyword(s):  
Complex System ◽  
Control System ◽  
Remote Control ◽  
Structural Features ◽  
Information Protection ◽  
Parametric Synthesis ◽  
Unauthorized Access ◽  
Operating Modes ◽  
Remote Control System ◽  
Made In

With the help of the general and structurally-information schemes of remote control, an analysis was made in the course of which the requirements for protection against unauthorized access of the complex system were clarified and established. In the article structural features of the remote control system of mobile measuring points of rocket and space equipment are considered. These features are represented by the requirements for information protection, as well as the operating modes of this system. The list of these regimes was obtained as a result of studies of structural and functional schemes of a remote control system for mobile measuring points.

Novel Synthetic Routes to s-Block Metal 2,5-Diphenylphospholides and Crystal Structures of the Bis(tetrahydrofuran) Complexes of the Potassium, Calcium, and Strontium Derivatives

2009 ◽  
Vol 64 (11-12) ◽  
pp. 1360-1368 ◽  
Author(s):  
Katja Wimmer ◽  
Christin Birg ◽  
Robert Kretschmer ◽  
Tareq M.A. Al-Shboul ◽  
Helmar Görls ◽  
...  
Keyword(s):  
Crystal Structures ◽  
Chain Structure ◽  
Molecular Structures ◽  
Metathesis Reaction ◽  
Sandwich Complex ◽  
Coordination Site ◽  
Metal Atoms ◽  
Synthetic Routes ◽  
A Chain

The reduction of 1,4-diphenyl-1,4-bis(diphenylphosphanyl)buta-1,3-diene (1) (1,4-diphenyl- NUPHOS) with potassium in THF yields bis(THF)potassium 2,5-diphenylphospholide (2) which crystallizes with a chain structure. The metathesis reaction of 2 with the iodides of calcium, strontium, and barium leads to the formation of [bis(THF)calcium bis(2,5-diphenylphospholide)] (3), [bis(THF)strontium bis(2,5-diphenylphospholide)] (4), and [bis(THF)barium bis(2,5-diphenylphospholide)] (5). The reaction of M{P(H)SiiPr3}2 with diphenylbutadiyne in THF also leads to the formation of the 2,5-diphenylphospholides of calcium (3), strontium (4), and barium (5). The molecular structures of 2 to 4 are discussed. The environment of the metal atoms is very similar in all these compounds: The metal atoms show an η5 coordination to the phospholide rings forming a bent sandwich complex. The open coordination site is occupied by two THF molecules

Syntheses, Structural Characterization and Fluorescence of Zn(II) and Cd(II) Polymers from 5-(Pyridin-2-ylmethylamino)isophthalic acid

2013 ◽  
Vol 68 (9) ◽  
pp. 1007-1014 ◽  
Author(s):  
Xiao-Chun Cheng ◽  
Xiao-Hong Zhu ◽  
Hai-Wei Kuai
Keyword(s):  
Water Clusters ◽  
Hydrothermal Reaction ◽  
Reaction System ◽  
Chain Structure ◽  
Isophthalic Acid ◽  
Auxiliary Ligand ◽  
X Ray Diffraction ◽  
X Ray ◽  
Alkaline Reaction ◽  
A Chain

The hydrothermal reaction of Zn(II) nitrate with 5-(pyridin-2-ylmethylamino)isophthalic acid (H2L) yields the complex [Zn(L)(H2O)] 2H2O (1). When 2,2'-bipyridine (bpy) as auxiliary ligand and Cd(II) nitrate were used in the alkaline reaction system, [Cd(L)(H2O)(bpy)] 3H2O (2) was obtained. Complexes 1 and 2 have been characterized by single-crystal and powder X-ray diffraction, IR, elemental and thermogravimetric analyses. Complex 1 shows a 2D fes network structure with uninodal 3-connected (4.82) topology, which is further linked by hydrogen bonding to give rise to a 3D supramolecular framework; complex 2 displays a chain structure. Interestingly, tetranuclear water clusters were generated in 1, which are interlinked to fabricate a water chain structure. The fluorescence properties of 1 and 2 were investigated

On the Vibration of a Translating String Coupled to Hydrodynamic Bearings

1990 ◽  
Vol 112 (3) ◽  
pp. 337-345 ◽  
Author(s):  
C. A. Tan ◽  
B. Yang ◽  
C. D. Mote
Keyword(s):  
Control System ◽  
Transfer Function ◽  
Spatial Location ◽  
System Response ◽  
Thickness Variation ◽  
Translation Speed ◽  
Impedance Function ◽  
Hydrodynamic Bearing ◽  
Loop Transfer Function ◽  
Bearing Force

The vibration of a translating string, controlled through hydrodynamic bearing forces, is analyzed by the transfer function method. Interactions between the string response and the bearing film are described by the bearing impedance function. This function depends on the string translation speed, the frequency of the film thickness variation, and the spatial location of the bearings. The control system consists of the translating string, bearings, actuators and sensors, and feedback elements. An integral formulation of the controlled system response is proposed that leads to the closed-loop transfer function. The frequency response of the control system is studied in the system parameter space. The feasibility of adding active control to improve the bearing force control is also considered.

scholarly journals Dynamic control of maximal ventricular elastance via the baroreflex and force-frequency relation in awake dogs before and after pacing-induced heart failure

2010 ◽  
Vol 299 (1) ◽  
pp. H62-H69 ◽  
Author(s):  
Xiaoxiao Chen ◽  
Javier A. Sala-Mercado ◽  
Robert L. Hammond ◽  
Masashi Ichinose ◽  
Soroor Soltani ◽  
...  
Keyword(s):  
Heart Failure ◽  
Transfer Function ◽  
Transfer Functions ◽  
Dynamic Properties ◽  
System Response ◽  
Force Frequency ◽  
Arterial Baroreflex ◽  
Ventricular Elastance ◽  
Arterial Blood ◽  
Frequency Relation

We investigated to what extent maximal ventricular elastance ( Emax) is dynamically controlled by the arterial baroreflex and force-frequency relation in conscious dogs and to what extent these mechanisms are attenuated after the induction of heart failure (HF). We mathematically analyzed spontaneous beat-to-beat hemodynamic variability. First, we estimated Emax for each beat during a baseline period using the ventricular unstressed volume determined with the traditional multiple beat method during vena cava occlusion. We then jointly identified the transfer functions (system gain value and time delay per frequency) relating beat-to-beat fluctuations in arterial blood pressure (ABP) to Emax (ABP→ Emax) and beat-to-beat fluctuations in heart rate (HR) to Emax (HR→ Emax) to characterize the dynamic properties of the arterial baroreflex and force-frequency relation, respectively. During the control condition, the ABP→ Emax transfer function revealed that ABP perturbations caused opposite direction Emax changes with a gain value of −0.023 ± 0.012 ml−1, whereas the HR→ Emax transfer function indicated that HR alterations caused same direction Emax changes with a gain value of 0.013 ± 0.005 mmHg·ml−1·(beats/min)−1. Both transfer functions behaved as low-pass filters. However, the ABP→ Emax transfer function was more sluggish than the HR→ Emax transfer function with overall time constants (indicator of full system response time to a sudden input change) of 11.2 ± 2.8 and 1.7 ± 0.5 s ( P < 0.05), respectively. During the HF condition, the ABP→ Emax and HR→ Emax transfer functions were markedly depressed with gain values reduced to −0.0002 ± 0.007 ml−1 and −0.001 ± 0.004 mmHg·ml−1·(beats/min)−1 ( P < 0.1). Emax is rapidly and significantly controlled at rest, but this modulation is virtually abolished in HF.

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