A MULTICONNECTED COMBINED SYSTEM FOR A FUNCTIONALLY PARAMETRIC IN-DEFINITE PLANT WITH NONАFFINITY AND CONTROL DELAY

The paper proposes a solution to the problem of synthesizing a multi-coupled combined control system for a non-affine plant with a delay in the input variable with gradually changing dynamics. The plant functions under conditions of a priori parametric and structural uncertainties in the presence of external interference when only the regulated variable is measured. The structure of a multiconnected control system includes an implicit reference model, a preceding-compensator and filter-correctors.

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CONTROL SYSTEM FOR STRUCTURURALLY AND PARAMETRICALLY UNDEFINED NON-AFFINE PLANT WITH NEUTRAL TYPE DELAY AND CONTROL DELAY

10.22250/isu.2021.70.110-121 ◽

2021 ◽

pp. 110-121

Author(s):

L.V. Nikiforova ◽

Keyword(s):

Control System ◽

Direct Measurement ◽

Neutral Type ◽

State Variables ◽

Control Delay ◽

Structural Uncertainties ◽

Neutral Type Delay ◽

And Control

The article deals with the synthesis of a controller for non-affine in input plant with neutral type delay and control delay, whose state variables are not available for direct measurement. The controller constructed on the basis of the hyperstability criterion compensates for the effects of delays, interference, parametric and structural uncertainties in the system.

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COMBINED SYSTEM CONTROLLER WITH AN IMPLICIT REFERENCE FOR OUTPUT CON-TROL OF A STRUCTURALLY INDETERMINATE NON-AFFINE PLANT WITH AN UN-KNOWN STATE DELAY

10.22250/isu.2020.66.118-128 ◽

2020 ◽

pp. 118-128

Author(s):

E.L. Eremin ◽

◽

L.V. Nikiforova ◽

E.A. Shelenok ◽

◽

...

Keyword(s):

Control System ◽

Reference Model ◽

A Priori ◽

Structural Complexity ◽

Combined System ◽

State Delay ◽

Unknown State ◽

Control Goal ◽

System Controller

We study the problem of controlling the output of a non-affine plant with a state delay, the mathemati-cal model of which is structurally and parametrically a priori uncertain. Within the framework of ap-plying the hyperstability criterion and L-dissipativity conditions, as well as using an implicit reference model and filter correctors in the control system, we consider the use of a combined controller with minimal structural complexity, but ensuring the achievement of the set control goal in a given class of non-affine objects with an unknown state delay.

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Adaptive Control of a Nonlinear Convertiplane under Conditions of Uncertainty

Proceedings of Southwest State University ◽

10.21869/2223-1560-2020-24-3-35-50 ◽

2020 ◽

Vol 24 (3) ◽

pp. 35-50

Author(s):

S. F. Yatsun ◽

O. V. Emelyanova ◽

Andres Santiago Martinez Leon ◽

Luis Miguel Mosquera Morocho

Keyword(s):

Mathematical Modeling ◽

Adaptive Control ◽

Control System ◽

Reference Model ◽

Visual Contact ◽

Hardware System ◽

The Difference ◽

Chemical Conditions ◽

And Control ◽

Physical And Chemical

Purpose of research. The article deals with the problem of monitoring water areas in order to control their physical and chemical conditions using a flying laboratory (FL) which includes an aircraft with attachable water intake equipment and a software and hardware system. A specific feature of the monitoring of surface waters is the unpredictable behavior of air and water, periodic absence of visual contact with the aircraft, the uncertainty of tricopter characteristics. Therefore, the purpose of this article is to study the parameters of the control system (CS) to meet the requirements for the accuracy of aircraft positioning in conditions of uncertainty of external parameters. Methods. Theoretical mechanics and robot mechanics methods were used to solve the set tasks. Methods for mathematical modeling of dynamic systems were used to study the patterns of convertiplane movement. Adaptive control with a reference model were used to plan and control the movement of the aircraft. Results. The use of adaptive FL motion control made it possible to ensure convergence to zero of the tracking errors i.e., the difference between the output signals and the reference model. The proposed control system gives a good result with small disturbing effects. The parameters of the regulator that ensure the quality indicators of the ACS within the specified limits are determined. Conclusion. A mathematical model was developed and mathematical modeling of the convertiplane movement under conditions of uncertainty of external influences was performed. The problem of parameter control of a convertiplane was considered when the control coefficients were available for setting. The developed algorithms in the adaptive control system made it possible to provide faster suppression of external disturbances in comparison with the traditional PID control system for the case of a linear description of the controlled object.

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Two-Loop System with Reference Model for Control of Spatial Movement of Cargo Underwater Vehicle

Mekhatronika Avtomatizatsiya Upravlenie ◽

10.17587/mau.22.134-144 ◽

2021 ◽

Vol 22 (3) ◽

pp. 134-144

Author(s):

V. F. Filaretov ◽

D. A. Yukhimets

Keyword(s):

Control System ◽

Control Systems ◽

Dynamic Models ◽

High Efficiency ◽

Reference Model ◽

Dynamic Properties ◽

Autonomous Underwater Vehicles ◽

Nonlinear Controller ◽

Combined System ◽

Spatial Trajectories

Currently, autonomous underwater vehicles (AUV) are increasingly used to perform tasks related to the maintenance of underwater communications and various underwater production complexes, as well as performing underwater technological operations. To effectively perform these operations, AUV must have high-quality control systems that will ensure their accurate movement both along long spatial trajectories formed during their movement to the objects of work, and when performing complex maneuvers near underwater infrastructure objects. At the same time, the main difficulty that arises in the process of synthesis of AUV control systems is the significant non-linearity of the dynamic models of these control objects, the presence of interactions between their degrees of freedom, as well as the uncertainty and variability of their parameters. In this paper, we propose a method for synthesizing the spatial motion control system of the AUV, which allows us to take into account these negative effects. This system contains two loops. The first loop includes a combined system containing a nonlinear controller to achieve the desired dynamic characteristics of the AUV, when its parameters are equal to the nominal values, and a controller with self-tuning according to the reference model, which provides compensation for an unknown or variable part of the parameters. In this case, the parameters of the controller with the reference model are selected to reduce the possible amplitude of the discontinuous signal for controlling the AUV velocity. The second loop is a non-linear position controller that allows to take into account the dynamic properties of the velocity control loop and the kinematic properties of the AUV. The advantage of the proposed control system in comparison with traditional ones based on PID controllers is a higher control accuracy when moving along complex spatial trajectories, regardless of changes in the AUV parameters. The simulation results confirmed the high efficiency of the synthesized two-loop control system.

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The Research on the System of Double-Holding Water Tank Liquid Level Control with the PID Control

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.945-949.2559 ◽

2014 ◽

Vol 945-949 ◽

pp. 2559-2562

Author(s):

Miao Yu ◽

Hong Li Jia ◽

Pan Jie Chen

Keyword(s):

Control System ◽

Liquid Level ◽

Water Tank ◽

Level Control ◽

Parameters Tuning ◽

Combined Control ◽

Interaction Interface ◽

Tank System ◽

And Control ◽

Liquid Level Control

Double tank level control system is the combined control with the host computer and basic instrument, and it realizes the communicative function through monitoring and management. The object of this topic is mainly on double-tank system, then gets the theoretical parameters PID through measuring the characteristic curves of the water level, and finally use MCGS configuration software on PC, for further interaction interface to the parameters tuning of double-holding water tank system and to set the parameters. After reaching the expected target, on the base of routine control PID, we can improve the system function by forming the double loop system and control the liquid level of the water bank better. The two tank liquid level control is made as the core control system by computer and as one kind of fashionable trends.

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MODEL OF FUNCTIONING OF INFORMATION-CONTROL SYSTEM OF UNMANNED CAR WITH DIFFERENT SENSORS CHANNELS OF INFORMATION INTERACTIO

Systemy Logistyczne Wojsk ◽

10.37055/slw/129223 ◽

2019 ◽

Vol 51 (2) ◽

pp. 85-92

Author(s):

Viktor KLIMENKO ◽

Oleg SUKHIN ◽

Denis KOTOV ◽

Denis LISOVENKO

Keyword(s):

Control System ◽

Simulation Modeling ◽

A Priori ◽

Information Control ◽

Unmanned Vehicle ◽

Information Interaction ◽

A Priori Uncertainty ◽

And Control

The article proposes an approach to the formalization of the process of information interaction of the information and control system of an unmanned vehicle with the environment, taking into account external destabilizing effects against the background of intra-system interference. The result of simulation modeling of the process of inverse processing of information arrays under conditions of a priori uncertainty is presented.

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Development of a Jacobian Module for Advanced Pulp and Paper Simulation and Control

TAPPI Journal ◽

10.32964/tj8.1.4 ◽

2009 ◽

Vol 8 (1) ◽

pp. 4-11

Author(s):

MOHAMED CHBEL ◽

LUC LAPERRIÈRE

Keyword(s):

Control System ◽

Nonlinear Behavior ◽

Simulation Software ◽

Pulp And Paper ◽

Pid Controllers ◽

Tuning Parameters ◽

Pid Tuning ◽

Fixed Set ◽

And Control ◽

Operating Points

Pulp and paper processes frequently present nonlinear behavior, which means that process dynam-ics change with the operating points. These nonlinearities can challenge process control. PID controllers are the most popular controllers because they are simple and robust. However, a fixed set of PID tuning parameters is gen-erally not sufficient to optimize control of the process. Problems related to nonlinearities such as sluggish or oscilla-tory response can arise in different operating regions. Gain scheduling is a potential solution. In processes with mul-tiple control objectives, the control strategy must further evaluate loop interactions to decide on the pairing of manipulated and controlled variables that minimize the effect of such interactions and hence, optimize controller’s performance and stability. Using the CADSIM Plus™ commercial simulation software, we developed a Jacobian sim-ulation module that enables automatic bumps on the manipulated variables to calculate process gains at different operating points. These gains can be used in controller tuning. The module also enables the control system designer to evaluate loop interactions in a multivariable control system by calculating the Relative Gain Array (RGA) matrix, of which the Jacobian is an essential part.

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