Optimal tuning for hydraulic controls
Automatic pressure control loop tuning
A new function in Automation Studio makes it possible to automatically tune the pressure control loop for hydraulic axes to the process conditions, saving users considerable time during setup. The automated process identifies the frequency response of the hydraulic system using a wideband speed signal and tunes the control loop parameters accordingly. B&R offers automatic tuning for more than just pressure control. Users have already been able to automatically tune the speed and current control loops on ACOPOS drives.
Monitor your own processes
During automatic tuning, the dynamic behavior of the hydraulic system is identified. This allows users to view the system's frequency response and monitor their own processes more efficiently. Changes in the dynamic behavior or signs of wear can be identified in this way. It is also possible to display the control loop settings in the frequency response and make targeted manual adjustments.
Efficient valve control
In valve-based hydraulic control loops, the hydraulic valve is used to regulate the hydraulic drive (cylinder). Unfortunately, the characteristic curves provided in the data sheet for valves are very often imprecise or the behavior changes over the product's service life. That's why B&R has developed an automated process for identification of valve characteristic curves. The curve is calculated by taking cylinder speed measurements with the valve open to varying degrees. The B&R hydraulic control kernel uses the characteristic curve to control the valve efficiently.