Design automation of electronic control devices for precision actuators

Аuthors

Duong D. H.^1*, Chaika Y. V.^2**

1. Moscow Aviation Institute (National Research University), 4, Volokolamskoe shosse, Moscow, А-80, GSP-3, 125993, Russia
2. ,

*e-mail: ducha1986@gmail.com
**e-mail: chaikay@mail.ru

Abstract

The article deals with electronic control devices computer-aided system design procedure. These devices are meant to work as a component part of the control circuit of high-precision electric drives based on contactless torque motors.
The article shows that implementation of both classical synthesis of of control loop components transfer characteristics by automatic control theory, as well as engineering method of control devices design, for example, proportional-integral-derivative controller (PID controller) using Ziegler-Nichols method, Chien-Hrones-Reswick (CHR) method or other, require the knowledge of transfer characteristics of all actuator components: motor, feedback sensors, all components of the transmission mechanism, control units, that can be obtained either experimentally, by theoretical calculation or as result of simulation. This procedure is based on using similar models — electric circuits and electromechanical analogies either for electronic control devices, or for electric motor, transmission mechanism, angular position sensors and load.
Source options for structural diagram of electric drive are standard circuit control devices. Electronic devices modeling system OrCAD-PSpice is used as a modeling tool, which allows to automatically obtaining Bode plot and transfer characteristics of the motor and the transmission mechanism. Then control device parameters are determined by formal methods for each option.
Selection of optimal control device is performed according to the results obtained from the joint modeling of all actuator components also by means of PSpice. In this case it is possible not only to obtain frequency response and transient characteristics of actuator, but also simulate the functioning of the actuator during input disturbances, close to real operating modes.
The proposed methodic allows:
— to use well-known software products for modeling electronic devices such as OrCAD-PSpice as means of simulation of all components;
— to automate calculation of transfer characteristics of all components of the following-up system in time domain, as well as in frequency domain, using PSpice built-in features;
— to automate calculation of the set of functional characteristics of all following-up system components in whole as well as its intermediate parts by means of the possibility of integration of similar parts models into electric motor drive integrated models and using a common simulation tool;
— to use PSpice parametric optimization subsystem software package for automation performance enhancement of components, synthesized by known formal methods, in order to obtain a higher accuracy of actuator characteristics, performance, and energy efficiency;
— to perform direct modeling of actuators and electronic devices, containing nonlinear and parametric components and, therefore, of control devices with variable parameters in operation, as well as to perform parametric optimization;
— to use the vast set electronic components libraries available in standard PSpice-OrCAD complex to create new models of electronic control devices, and other actuator components.

Keywords:

electronic control devices, contactless motor, design, optimization

References

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