Advanced signal processing expands artificial limb capabilities

Clearman, Chris
May 2006
Portable Design;May2006, Vol. 12 Issue 5, p32
The article reports that the new generation of prostheses uses an advanced signal processing based motor control strategy to dramatically improve these capabilities. A new generation of controls based on advanced signal processing technology is emerging to overcome the limitations of both analog and microprocessor-based control systems. The Boston Digital Arm from Liberating Technologies provides amputees with unique upper limb prostheses that are more flexible and capable, in large part due to the control optimized performance and integration offered by advanced digital signal controllers. When Liberating Technologies set out to design the Boston Digital Arm, the company's engineers decided that they would need advanced signal processing capabilities to meet their design objectives. One of the main reasons for this is that the myoelectric signals that travel along the nerves and are used to control muscles are at such low levels that they can easily be interrupted by noise, such as interference from a fluorescent lamp.


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