| | Quadrature-Encoded Position and Beyond... | |
This month, Don wraps up techniques for determining angular position and turns the
discussion to sensorless control.
For some time now I've been writing about motion control and digital signal processing (DSP). Throughout our dis... |
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| | Tracking Demodulation... | |
High resolution encoders are expensive, but alternatives exist. You can develop a high-resolution system using a sinusoidal encoder or resolver.
Last month, we covered some of the basics of using cosinusoids to determine position ... |
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| | Look Ma, No Hands!... | |
Not all systems have position or velocity sensors. In those cases, consider using a stepper motor to effect sensorless control.
In my most recent columns I've detailed several motion control techniques that employ position and velocity fe... |
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| | Sympathetic Algorithms... | |
Controlling a motor without sensors sounds hard, but it can be done. One approach is to run a sympathetic software model of the system.
Last month, I wrote about sensor-less motion control as it applied to stepper motors, as well as m... |
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| | Get Your Motor Running... | |
Step motors are used in many devices and appliances that are part of our everyday lives. Learn some basics to start designing products with them.
Step motors are everywhere. As an embedded developer, you may have already designed ... |
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| | Introduction to fuzzy control... | |
Fuzzy logic is a tool to help you control complex systems.
Most control systems are based on proportional integral derivative (PID) technology ("Closed-Loop Control," August 2002, p. 55). Some systems, however, require a more comp... |
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| | A ZigBee Radio Tutorial for the non-RF Expert... | |
ZigBee and IEEE 802.15.4 are low data rate wireless networking standards that can eliminate the costly and damage prone wiring in industrial control applications. Flow or process control equipment can be place anywhere and still communicate wi... |
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| | Helping Designers Make the Right Choices for Automation... | |
A while back, I heard a statement that stuck in my mind: "While automation has played a large part in increasing productivity, we have not gotten the help from robotics that we had hoped for." That took me by surprise, since I've worked as a designe... |
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