A Control Law Definition of the Open Loop Stepping Electric Drive
| Autor: | Alexander Krasovskii |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
stepping motor
controlled invertor of a current lcsh:Computer engineering. Computer hardware Computer science Control (management) Open-loop controller lcsh:TK7885-7895 Control engineering General Medicine simulation accuracy increase dynamic error lcsh:Mechanics of engineering. Applied mechanics lcsh:TA349-359 the set trajectory of movement Electric drive |
| Zdroj: | Nauka i Obrazovanie, Vol 0, Iss 3, Pp 320-330 (2015) |
| ISSN: | 1994-0408 |
| DOI: | 10.7463/0315.0761902 |
| Popis: | The paper considers an open loop stepping electric drive (SEP) with electric crushing of a step and motor fed from the controlled current invertor which should meet the requirement that is to trial a free-form guided trajectory with a split-hair accuracy. It is shown that with traditional programmed control, when the SEP forms motor phase currents of identical amplitude and variable frequency proportional to the set speed of movement, there may be considerable errors reducing a trial accuracy of the set movement trajectory, dynamic indicators provoking oscillatory processes, and even loss of motor synchronism because influence on a dynamic moment of the motor is impossible.The paper offers and proves a new way to define a control algorithm adequate to drive parameters and programmed trajectory of movement, providing error minimization and thereby increasing trial accuracy of set parameters of movement and expanding dynamic capabilities of a drive. The essence of the offered way is to use a modified mathematical model of a drive in d,q coordinates with a motor fed by the current source. In this model a programmed trajectory of movement is chosen as an input action while solving the appropriate equations defines the necessary law of control. The paper describes a developed simulation model of the stepping electric drive in the environment of MATLAB – SIMULINK, which has been used to verify and prove an efficiency of the offered method to define a control law via typical examples.It is established that no error trial of set movement trajectory in case it has breaks (jogs) is technically unfeasible, as it demands an infinitely high forcing voltage of the power supply to maintain the instant positive or negative phase shifts of currents formed in the motor windings.The obtained results can be used in designing programmable precision SEPs in robots, numerically controlled machine tools, and assembly equipment. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|