DYNAMIC PROPERTIES AND TRAJECTORY SENSITIVITY OF VARIANTS OF POSITION ELECTROMECHANICAL SYSTEMS

Abstract

Relevance. Positional electromechanical systems are essential for an automation of technological processes. The existing approach to the implementation of such systems consists in the generating of motion trajectory, which has to track the positional electric drive. Usually, positional systems perform with proportional-integral speed control of an electric drive, subordinated to the proportional position controller. Such system can be referred as typical one. As other approach is the variant of the alternative position system with the reference model of the control loop and the proportional speed controller. Based on the properties of cascade control, such system will have less response time, which is important to ensure a reduction in the tracking transient error. But it hasn’t any comparative information about dynamic properties of these systems. Purpose. The research is carried out to analyze the dynamic properties of variants of positional electromechanical systems, including the sensitivity evaluation to parameter changing of control systems. Methodology. The analysis and simulation of systems is performed using mathematical description of systems in the state space observable form. Such approach gives the possibility to scale the results for visualization. The parameters of speed and position controllers were determined with the help of the modulus criterion of optimization. Results. It has been determined that a typical system with a proportional-integral speed controller for an electric drive has worse dynamic characteristics. The computer simulation demonstrates that the alternative system has the response time approximately in 2 times better, and the maximum of dynamic error at the load step increasing is less on 26 % than in the typical system. Also the dynamics quantities have been evaluated based on the trajectory sensitivity of both systems. As a result, the lower sensitivity to changing in the main parameters was obtained for the typical system. An exception is the position control coefficient, the sensitivity to changing of which is approximately the same in both cases. It is noted that the correction of positional reference signal as a function of the first and second derivatives of this signal provides the typical system reference performances almost the same as for the system with the reference model, but the system becomes more sensitive to parameter changes. Practical value. The research results provide a basis for variant choice of the positional system for practical application, depending on the requirements of technological process.

Authors and Affiliations

Sergii Starostin, Luchana Rotkevich

Keywords

Related Articles

SYSTEM OF ELECTROCHEMICAL PROTECTION AGAINST CORROSION WITH ADAPTATION TO CHANGE ELECTROTECHNICAL PARAMETERS OF PROTECTION OBJECT

Purpose. It has been established that the desired operating point of the active corrosion protection system can be achieved by forming the corresponding frequency spectrum of the output signal of the cathodic protection...

DECOMPOSITION AND LINEARIZATION OF ASYNCHRONOUS MOTOR MATHEMATICAL MODELS IN RELATIVE UNITS

Purpose. To obtain the mathematical expressions for the coefficients of linearized asynchronous motor equations in relative units, which allow making correct compensation of the separate components of the control object...

LABORATORY STAND FOR INVESTIGATION OF OPERATING MODES OF THE FAN SYSTEM

Purpose. The work is devoted to the synthesis of the complex laboratory stand, intended for research of the energy and pressure characteristics of a centrifugal fan unit. The element base of the stand consists of equipme...

INVESTIGATION OF DISTRIBUTION OF THE MAGNETIC FIELD OF THE ASYNCHRONOUS MACHINE IN CONDITIONS OF EDUCATIONAL AND MANUFACTURING LABORATORIES

Purpose. Investigation of distribution the induction magnetic field around asynchronous machines in the conditions of educational and production laboratories to determine the safe placement of workplace staffs, as well...

MEASURING INDICATORS OF ENERGY PROCESSES IN THE ASYNCHRONOUS GENERATOR ON THE BASIS OF THE VIRTUAL MODEL IN THE LABVIEW SOFTWARE

Purpose. To investigate the process of power generation in the autonomous sources of energy based on an asynchronous generator with capacitive excitation and creating easy to use and clearly virtual device performance po...

Download PDF file
  • EP ID EP660021
  • DOI 10.30929/2072-2052.2018.4.44.8-13
  • Views 144
  • Downloads 0

How To Cite

Sergii Starostin, Luchana Rotkevich (2018). DYNAMIC PROPERTIES AND TRAJECTORY SENSITIVITY OF VARIANTS OF POSITION ELECTROMECHANICAL SYSTEMS. Електромеханічні і енергозберігаючі системи, 4(44), 8-13. https://europub.co.uk/articles/-A-660021