Structural and parametric synthesis and optimization of controllers of selective-invariant electromechanical systems with harmonic load torque

2015 ◽  
Vol 86 (5) ◽  
pp. 296-303 ◽  
Author(s):  
S. V. Tararykin ◽  
L. G. Kopylova ◽  
I. A. Tikhomirova
Keyword(s):  
Harmonic Load ◽  
Load Torque ◽  
Parametric Synthesis ◽  
Electromechanical Systems

scholarly journals Development and research of selectively invariant electromechanical systems with elastic kinematic units based on the separation of the harmonic disturbance model

Vestnik IGEU ◽  
2021 ◽  
pp. 49-59
Author(s):  
I.A. Tikhomirova ◽  
S.V. Tararykin
Keyword(s):  
Distributed Model ◽  
Synthesis Process ◽  
Parametric Synthesis ◽  
Electromechanical Systems ◽  
Special Effects ◽  
Electric Drives ◽  
Mechanical Part ◽  
Pros And Cons ◽  
Disturbance Model ◽  
Mechanical Elements

Currently there is a big variety of structure solutions of the selective invariant electromechanical systems with different layout schemes of disturbance internal model for electric drives with robust kinematic units. However, methods of structural parametric synthesis for controllers with combined triggering model only were developed selective invariant systems with “robust” kinematic of mechanical part. Consequently, further improvement of the structure variety of systems for special effects of elastic kinematic units of mechanical part is of current interest. It can be performed by including the distributed model of harmonic disturbance into the synthesis process. Structural parametric synthesis is based on the methods of modal control theory, regulators reduction, selective invariant principals, velocity separation in local sub-systems, regulation by coordinates of state and by output, cascade and slaved coordinates regulation, splitting of disturbance model to separate elements in managing contours. Investigation was performed by specified computing experiments with synthesized electromechanical system models. Now, new structure solutions of selective invariant electromechanical systems with elastic mechanical elements are developed. They are created by using the additional separation principle for disturbance model into separate parts and moving them in to the contours of “fast” and “slow” sub-systems. Acquired models of synthesized systems were compared upon the complex of main quality indicators, the comparison was based on the performed computing experiments. The acquired results of complex performance of set requirements demonstrate main pros and cons for each variant of selective invariant electromechanical systems with elastic elements, determine areas of their preferred usage and allow the developers to simplify the solution of structure optimization based on selected schema of compromises.

Transients of electrical and mechanical quantities of a brushless DC motor - computations, measurements

2011 ◽  
Vol 60 (1) ◽  
pp. 23-34 ◽  
Author(s):  
Marek Ciurys ◽  
Ignacy Dudzikowski
Keyword(s):  
Dc Motor ◽  
Field Method ◽  
Moment Of Inertia ◽  
Computational Method ◽  
Brushless Dc Motor ◽  
Variable Load ◽  
Load Torque ◽  
Electromechanical Systems ◽  
Brushless Dc ◽  
Use Of Time

Transients of electrical and mechanical quantities of a brushless DC motor - computations, measurements The paper presents a method of computing electrical and mechanical variables of BLDC motors. It takes into account electrical, magnetic and mechanical phenomena in the power supply-converter-BLDC motor-load machine system. The solution to the problem is the so-called circuit-field method. The results determined with the use of time stepping finite element method were used as the parameters of equations of the developed mathematical model. Losses in the motor, losses in transistors and diodes of the converter as well as the actual back EMF waveforms, variable moment of inertia and variable load torque are accounted for. The designed laboratory stand and the test results are presented in the paper. The experimental verification shows the correctness of the developed method, algorithm and program. The developed computational method is universal with respect to different electromechanical systems with cylindrical BLDC motors. It can be applied to electromechanical systems with BLDC motors operating at constant but also variable load torque and moment of inertia.

scholarly journals Adaptive selective-invariant control of tracking electric drives with elastic kinematic transmissions

Vestnik IGEU ◽  
2021 ◽  
pp. 57-64
Author(s):  
I.A. Tikhomirova ◽  
L.G. Kopylova ◽  
S.V. Tararykin
Keyword(s):  
Tracking Control ◽  
Dynamic Control ◽  
Synthesis Methods ◽  
Parametric Synthesis ◽  
Electromechanical Systems ◽  
Wide Range ◽  
Angular Displacements ◽  
Invariant Control ◽  
Effective Use ◽  
Structural Solutions

Currently, high quality indicators of adaptive versions of selective-invariant electromechanical systems designed to control the speed in a wide range have been obtained. Thus, it lays the groundwork for effective use of the proposed synthesis methods and obtained structural solutions in the systems of contour-positional and tracking control of angular displacements of the working elements of technological machines. The implemented structural-parametric synthesis is based on the methods of the theory of modal control, reduction of regulators, the principles of selective invariance, separation of the rates of movement of local subsystems, adaptive, contour-positional and tracking control. The study has been carried out by detailed computational experiments with models of synthesized electromechanical systems. The features of synthesis and functioning of adaptive selective-invariant systems with elastic kinematic links in the tracking and positioning modes are described. The combination of the principles of tracking, selective-invariant and adaptive control in the structure of a single electromechanical system makes it possible to fully provide new opportunities for the implementation of high-precision dynamic control of working machines.

Analysis of structure factors affecting suspension force of permanent magnet system with variable magnetic flux path control

2020 ◽  
Vol 64 (1-4) ◽  
pp. 1495-1504
Author(s):  
Fangchao Xu ◽  
Yongquan Guo ◽  
Ran Zhou ◽  
Junjie Jin ◽  
Chuan Zhao ◽  
...  
Keyword(s):  
Magnetic Flux ◽  
Permanent Magnet ◽  
System Structure ◽  
Magnet System ◽  
Load Torque ◽  
Factors Affecting ◽  
Annular Gap ◽  
Path Control ◽  
Structure Factors ◽  
Flux Path

To solve the problem of reduction of suspension force of permanent magnet system with variable magnetic flux path control, according to the structure of the system, suspension principle of the permanent magnet system with variable magnetic flux path control and the generation principle of the load torque, the influence of the mechanical structure of the system on the suspension force is analyzed by changing part of parameters of the system structure. The results show that the existence of magnetic isolation plate is the main reason for the decrease of suspension force, the permanent magnet ring can be thickened to 11.91 mm, the annular gap can be reduced to 1 mm, thickness of the “F” shaped magnetizer can be increased to 9 mm to increase the suspension force.

Sign in / Sign up

Export Citation Format

Share Document