Non-contacting control of objects by pulse width modulated air-jet actuators and optical position feedback

1995 ◽  
Vol 35 (3) ◽  
pp. 487-501
Author(s):  
H. Ekerol ◽  
D.C. Hodgson
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulated ◽  
Air Jet ◽  
Optical Position ◽  
Jet Actuators ◽  
Position Feedback

Pulse width modulated reinforced piezo air jet actuators

Mechatronics ◽  
1997 ◽  
Vol 7 (1) ◽  
pp. 11-25 ◽  
Author(s):  
Y. Zhao ◽  
B. Jones
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulated ◽  
Air Jet ◽  
Jet Actuators

Development of an Antagonistic SMA Actuator for Instar Rifle Stabilization System

Aerospace ◽  
2005 ◽  
Author(s):  
Brian Barnes ◽  
Diann Brei ◽  
Jonathan Luntz ◽  
Chris LaVigna
Keyword(s):  
Motion Control ◽  
Pulse Width ◽  
High Stress ◽  
Experimental Characterization ◽  
Pulse Width Modulated ◽  
Actuation System ◽  
Position Feedback ◽  
Sma Actuator ◽  
Feedback Control Strategy

Shape memory alloys are notoriously slow and suffer from creep and controllability issues [1,2]. This paper presents three methods to address these issues: a high-stress cyclic conditioning regime to reduce creep to operationally insignificant levels, an unconventional pulse-width-modulated duty cycle with heatsink to increase frequency to the ten hertz range, and simple position feedback control strategy for motion control. These methods are discussed within the context of a simple antagonistic leveraged SMA actuation system developed for an INertially STAbilized Rifle (INSTAR). An overview of design and basic parameter models for the L-Lever is provided along with benchtop experimental characterization of the quasistatic and dynamic behavior. The actuator was integrated into a one degree of freedom INSTAR platform to demonstrate the insitu methods via barrel control. The methods discussed in this paper led to a fast, low-creep, controllable actuator with outstanding authority resulting in precise barrel control with capabilities to greatly increase shooter accuracy.

Pulse-Width Modulated Amplifier for DC Servo System and Its Matlab Simulation

2015 ◽  
Vol 9 (1) ◽  
pp. 625-631
Author(s):  
Ma Xiaocheng ◽  
Zhang Haotian ◽  
Cheng Yiqing ◽  
Zhu Lina ◽  
Wu Dan
Keyword(s):  
Mathematical Model ◽  
Transfer Function ◽  
Input Signal ◽  
Pulse Width ◽  
Rotation Speed ◽  
Servo Motor ◽  
Matlab Simulation ◽  
Pulse Width Modulated ◽  
Signal Changes ◽  
The Relationship

This paper introduces a mathematical model for Pulse-Width Modulated Amplifier for DC Servo Motor. The relationship between pulse-width modulated (PWM) signal and reference rotation speed is specified, and a general model of motor represented by transfer function is also put forward. When the input signal changes, the rotation speed of the servo motor will change accordingly. By changing zeros and poles, transient performance of this system is discussed in detail, and optimal ranges of the parameters is recommended at the end of discussion.

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