Nested Closed-Loop Feedback
The entire DRX line of products feature Closed-loop feedback which is defined as an automatic control system that can adjust and self-correct its operation according to differences between the actual and desired output. Closed-loop feedback systems improve overall system performance.
The effectiveness of closed-loop feedback systems vary based on the variables measured, how they’re measured, and how often they’re measured. With respect to spinal decompression systems, the measured variable is most often force, which is the amount of tension used to distract the spine.
High-Speed Nested Closed Loop Feedback
- Sophisticated Servo Motion Control
- Custom Dynamometer and Feedback Electronics
- Windows / PC-based Treatment Algorithms and Application
- Floating Lower Mattress (Split Table Design)
- Hardened Steel Shafting and Steel Bearings to reduce friction as much as possible
The DRX device series incorporates closed-loop feedback within a closed-loop feedback system, referred to as nested closed-loop feedback. As illustrated to the left, one of the three stops on the closed-loop feedback path in the DRX devices is the servo-amplifier and servo-motor. The servo-amplifier receives corrective force commands from the treatment computer 13 x per second. The servo-motor itself contains very accurate devices that measure force, speed, and power consumption. The servo-amplifier monitors these variables, correcting the actions of the servo-motor 4,000 x per second. The nested closed-loop feedback system is one of the technological hallmarks of the DRX device series.