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References in periodicals archive ?
Open loop control reshapes DMs into iterative or pre-determined geometries, while closed loop calculates geometries based on feedback from wavefront sensors.
Open loop control is used to control the speed of the motor by honestly controlling the duty cycle of the PWM signal to drives the motor-drive circuitry.
Before conducting machining experiments, simulations including open loop control, fuzzy-PID control, and fuzzy-sliding mode control are carried out to get a preview of the control scheme performance.
Designed specifically for the open loop control of stepper motors sized Nema 17 to Nema 34, Nanotec Electronic GmbH & Co.
However, the gain of the open loop control system is adjusted by a feedback control of the frequency signal, so that the whole open loop gain crosses the 0 dB point at the desired switching frequency.
This type of motor is characterized by a particular structure similar to that of the rotary stepper motor and it is widely used in open loop control. During the 1970s the closed loop control was introduced in stepper motor in order to increase the positioning accuracy and to reduce their sensitivity to disturbances load [1], [2].
An optimal open loop control is first obtained by using a time scaling transform [18] and the control parameterization technique [19].
Nevertheless, the approach does present a remarkable advantage towards a traditional open loop control. Having learnt the new mapping though, the manipulator could recognize the change in its environment and adapt or even load a previously computed new mapping of its behavior accordingly.
Wireless operation The ISA-100.11a standard is intended to provide reliable and secure wireless operation for non-critical monitoring, alerting, supervisory control, open loop control, and closed loop control applications.
MAE[R] brand hybrid stepper motors from AMETEK Technical & Industrial Products are engineered to deliver open loop control for high-performance positioning.
MAE[TM] "Y Series" hybrid stepper motors are designed to deliver accurate open loop control for high-performance positioning applications.
The DTO employs an oven-stabilized VCO using open loop control. The open loop control corrects the VCO input digital control data using a memorized digital calibration.