This simulation is based on the next prototype design we expect to build, test and evaluate. It has been developed based on a combination of finite element modelling - static & normal modes modes, augmented with in-house matlab simulations. The non-linear influences have been modelled and evaluated in matlab, against test results of earlier prototypes.
This 1st simulation does not include temperature influence, nor does it include the algorithm to translate between frequency and load. We know from earlier testing that the configuration has minor thermal distortions. We will be building the temperature effects and frequency transduction algorithm into the upgraded simulation. We have done enough work to be able to analytically isolate and predict the temperature mechanisms.
|Measureable force||90 lb||0.4 lb|
|Measureable moment||250 ft-lb||0.6 in-lb Nm|
|Allowable Drift (10% of measurement)||8 hours||n/a|
|Rotational Stiffness||25.4e4 lb-in/rad||27.e3 lb-in/rad|
|Surviveable Force||150 lb||n/a|
|Surviveable Moment||370 ft-lb||n/a|
|mass, excluding electronics||3.5 lb||n/a|
|dimensions||diameter: 9 1/8"||height: 2 1/4"|
|1st resonance||n/a||617 Hz|
If you're interested trying out the sim, as part of your control program, you can download the matlab and sample files fms simulation , the matlab code. Of course, its still just a design and analysis. No consideration of temperature yet.The mass properties are taken as linear, without cabling. The table was taken from Nastran output file. Mass units are lb f- sec 2/inch. RIGID BODY MASS MATRIX AT ORIGIN