Motion Control Architecture

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  In some cases more than one motion control technology fulfills the motor requirements.  Other external factors like energy efficiency, cost and flexibility of the components will also help you to decide the parts that will make up your motion control system.

 

The components of the basic architecture of a motion control system are as follows-

 

The most primary and basic component of a motion control system is a motion controller that is required to generate the desired motion profile and also facilitates  to close a pre set position feedback loop.

An amplifier – The amplifier plays an important role in the architecture of a motion control system. It converts the signal that it receives from the motion controller into elevated electrical current that is then passed on to the actuator. Advancements in technology have led to the invention of programmable drives that have been incorporated with capabilities that can secure the location as well as the velocity loops on the inside. This results in more accurate motion control.

An Actuator- This is a mechanical device that is used for bringing about motion in a system. In motion control, actuators convert the electrical signals in to motion.

Feed Back sensors- Optical encoders, resolvers are feedback sensors that are commonly used in motion control. These devices are used to close the velocity loops as they return the position of the actuator back to the controller. This closes the loop. Depending on the requirement one or multiple feedback sensors can be used.

Finally, mechanical components like gears, ball screws, linkages, belts and shafting that help in converting motion of the actuator into the desired motion.

In a motion control system the interface that exists between the motion controller and the drives is very important. This will actually help in providing coordinated motion with very strict synchronization. Initially the open interface that was used was the analogue signals. SERCOS and SERCOS III are the more advanced open interfaces that meet all the present motion requirements.

 

Besides the above components that are essential in the building of a motion control system, there are some control functions like the velocity control, force control, point to point position control and cam profiling that too requires importance for the successful functioning of a control system.

 

 

 Article by Jenny at Inter-dev Internet Marketing Company on behalf of Nanovibronix.com – servo drives

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