NSF Controls launches breakthrough in short stroke actuator technology

Citation

(2003), "NSF Controls launches breakthrough in short stroke actuator technology", Aircraft Engineering and Aerospace Technology, Vol. 75 No. 4. https://doi.org/10.1108/aeat.2003.12775dad.008

NSF Controls launches breakthrough in short stroke actuator technology

NSF Controls launches breakthrough in short stroke actuator technology

Keywords: Actuators, Sensors, Equipment

UK-based NSF Controls is set to launch an exciting breakthrough in short stroke actuator technology with the development of a Servo Linear Positioner (SLP) system. Embodying a number of innovative and patented features, the SLP is an integrated and highly responsive liner actuator and position sensor contained within a single, compact unit. The design meets a long-standing requirement for a short stroke actuator with ultra-fine positional control (Plate 3).

Designers have previously chosen from a relatively limited selection of technologies to meet this requirement. Typically, these would be solenoids, moving coil motors, motorised screw units or pneumatic cylinders. None of these technologies approach the combination of performance and functionality afforded by the SLP – and few rival it for cost.

Plate 3 SLP from NSF controls

The SLP system owes its uniqueness and exceptional functionality to a compact and rugged moving magnet design, which, using an innovative dual function configuration of windings, creates both a high efficiency linear thrust motor and a fully integrated, high performance absolute position sensor.

The integrated sensor/actuator arrangement results in a compact assembly with a minimal number of electrical connections and a mechanically simple moving part. The unit is also electrically symmetrical which contributes to highly stable temperature performance as well as making it extremely easy to design into a given application.

The SLP is extremely easy to use, offering direct digital or analogue control through a simple, adaptable interface. The SLP is also easy to install, with direct coupling to driven parts and a straightforward, four-wire connection. Direct coupling also gives continuous wear free operation even under the most arduous conditions, while the SLP is adaptable for operation in the most extreme environments, such as cryogenic temperatures and high vacuum.

Another outstanding feature of the SLP is its accuracy and controllability, with positional resolution to 1.0 m (depending on stroke range), and a response time of 10 to 20 ms. Actuator response and load forces are monitored continuously in real time and the SLP is truly multi-functional, able to operate as an actuator, sensor or position controller.

In addition to its capabilities for replacement or upgrade of designs using existing technologies, the SLP with its unique sensory feedback capabilities, opens up unlimited design possibilities. Such designs include the upgrade of solenoid applications for controllability of movement or elimination of impacting, valve and regulator control applications with real time system conditioning or fault monitoring, remote/high reliability actuators operating in hazardous environments or extreme temperatures, variable displacement pumping and metering system actuators, and servo force transducers.

Potential areas of application for the SLP include test/measurement and instrumentation, medical, acoustic control, machine tools, process equipment, robotics, probing, automotive and aerospace.

For further information, Please contact: Roy Whitaker, NSF Controls Ltd, Keighley, West Yorkshire, BD21 5EF, UK. E-mail: rw@nsfcontrols.co.uk; Web site: www.nsfcontrols.co.uk