Motion Control

Heart Pump with Behind-the-Ear Power Connector

One-third of patients with heart pumps develop infection at abdominal connection. Cardiac surgeons and cardiologists at the University of Maryland Heart Center are part of a multi-center clinical trial evaluating the efficacy of powering heart pumps through a skull-based connector behind the ear. The pumps, called left ventricular assist devices (LVADs), support the heart’s main pumping chamber, the left ventricle. LVADs are implanted in the chest and powered with external batteries. Typically, these devices, which are used for patients with severe heart failure, are powered through an electrical cord connected at the abdomen, where potentially deadly infections can develop.

Posted in: Drug Delivery & Dispensing, Electronics, Implants & Prosthetics, Bio-Medical, Briefs, Briefs, Electronic Components, Electronics, Power Management, Power Supplies, Implants & Prosthetics, Patient Monitoring, Fluid Handling, Power Transmission

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Robotic Exoskeleton Vastly Improves Quality of Life

Worldwide an estimated 185 million people use a wheelchair daily. A company based in Auckland, New Zealand, has developed an innovative robotic technology that helps people with mobility impairment get back on their feet— the Rex Bionics robotic exoskeleton. Its integrated maxon motors help to ensure smooth limb movement.

Posted in: Biosensors, Implants & Prosthetics, Mechanical Components, Rehabilitation & Physical Therapy, Features, Articles, Electronics, Power Management, Power Supplies, Implants & Prosthetics, Orthopedics, Rehabilitation & Physical Therapy, Motors & Drives, Positioning Equipment, Power Transmission

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Feedback Sensors Keep Servomotors on Target

Fundamentally, a servo system can perform no more accurately than the accuracy of the feedback device controlling it. In addition, errors in speed or position can be introduced into the system by the less-than-perfect mechanisms that transfer the motor power to the load. Environmental factors like electrical noise or temperature may also introduce positioning errors. Sometimes the errors are acceptable. More frequently, however, they are not. When it comes to high-performance servo applications, feedback devices fall into several different categories. Each offers unique advantages and disadvantages, both electrical and mechanical, that make one better suited for a particular application than another.

Posted in: Features, Articles

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Handling Delicate Materials

Special care needs to be taken when handling delicate materials used in medical applications. Small diameters provide increased flexibility needed for long-flex-life applications such as cardiac catheter wires. Many other applications also use these fine materials as winding and braiding materials, including the medical device industry, microelectronics, and composites.

Posted in: Applications, Features, Articles

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Real-Time Software Enables Multi-Core PCs for Industrial Automation

As early as 25 years ago, industrial system integrators saw the great potential that the Windows operating system brought to PCs. They saw the possibility of using the advanced graphic capabilities that Windows offered versus the relatively primitive human interfaces of DOS-based applications and those of other proprietary OSes. Windows enabled the development of controllers with advanced human-ma chine interfaces (HMIs) that provide a whole new level of functionality, and make machines easier to use and maintain.

Posted in: Features, Articles

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Using Source Measure Units to Characterize High-Power Semiconductors (Part 1)

The proliferation of electronic control and electronic power conversion into a variety of industries (e.g., energy generation, industrial motor drives and control, transportation, and IT) has made efficient power semiconductor device design and test more critical than ever. To demonstrate technology improvements, new device capabilities must be compared with those of existing devices. The use of semiconductor materials other than silicon demands the use of new processes. To be sustainable, these new processes must be tuned to deliver consistent results and high production yield. As new device designs are developed, reliability measurements must be performed on many devices over long periods. Therefore, test engineers must identify test equipment that is not only accurate, but scalable and cost-effective.

Posted in: Features, Articles

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Linear Guide Systems Streamline Aircraft Seat Assembly and Operation

Linear guide rails are an important component within aircraft interiors. Following are some of the places where they are used: • For seat adjustments — forward and back seat movements, footrests, sliding armrests, and tables. • Rails enable 180° positioning for super first class seats that flatten for sleeping. • Sliding privacy screens between passengers. • Kitchen slide-outs, such as garbage compactors. • Sliding lavatory doors.

Posted in: Articles, Features, Articles

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