Vic Kuzmovich, NAIAD’s stabilizer guru, was out with us aboard Wind Horse today doing slow speed stabilization tests as a model for the FPB 112. There is a video link at the bottom of this blog so you can see the results for yourself.
The faster we go the more stable the ride, and our stabilizer control algorithms are optimized for cruising at 10 to 11 knots. For these tests Vic was adjusting the active settings to more aggressive levels. The results you will see in the video are quite good, even though our stabilizer system is not set up for this regime. If it were VIc indicated the motion would be as much as 25% less.
The waves look quite small in the video, and are in the range of two to three feet / .6 to .9m. Short period waves like these induce more motion than bigger, longer period open ocean waves. The headings were oriented to keep the seas on the beam. The combination of wave angle, period, and minimal boat speed is a worst case scenario.
To watch the video click here.
Posted by Steve Dashew (April 16, 2011)
April 24th, 2011 at 5:08 pm
Can a “adaptable” system be designed where proper sensors detect what is occuring and adjust the response accordingly? Something like the road surface detecting shock absorbers that adjust the shock response.
April 25th, 2011 at 10:42 am
Hi John:
The NAIAD control has an adaptive mode where it learns the sea state and the active where you control the values.
April 26th, 2011 at 6:26 am
When the stablizers themselves were damaged in the Med, you commented about how they were constructed. Will that be changed on the 112?
April 26th, 2011 at 9:01 pm
Howdy John:
Turns out we had a faulty molding on our fin, which NAIAD is going to make us whole about. On the 112, the stabilizer mechanisms will be two sizes larger than normal, and have a five inch/125mm shaft as compared to 75mm. The fins will be metal.