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The Elements of Statistical Learning
Describes important statistical ideas in machine learning, data mining, and bioinformatics. Covers a broad range, from prediction to unsupervised learning, including classification trees and neural networks.
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Pneumatics and servos

The relative merrits of pneumatics and servos is particularly relevant in industrial robotics applications. Pneumatics are relatively strong for their weight and also pretty cheap, but the downside is that they usually require a large compressed air supply, their response rate is typically fairly slow and repeatability can be poor. With most pneumatics systems they are simple on/off type actuators having little or no control over the velocity/time profile of the movement. Servos by contrast can work at much higher speeds and accuracies with little or no change in their physical properties over time, but typically their cost is significantly higher.

Over the past decade there has been a decisive shift away from using pneumatics and towards servo driven systems. The main factors influencing this change are falling costs, improved accuracy and speed. Optical encoders used on many servo motors have also seen improvements which mean that these motors may be used in extremes of heat and vibration.

- Bob

136 posts.
Monday 01 April, 16:46
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