Forgive my multiple posts but I have been directed to a couple different forums to better answer my question.
I have an embedded DFT that identifies the velocity magnitude and phase of the heavy spot on rotors, from time-series accelerometer and key-phasor data.
I wish to validate and...
I have nearly completed a hand-held device for capturing accelerometer time-series and key phasor data, for generating velocity magnitude and phase report of the "heavy spot" on rotating machinery.
I now need to validate and eventually certify the result from my embedded DFT.
Can someone refer...
K-type thermocouples are commonly used for exhaust gas (EGT) and cylinder head (CHT) temperature monitoring in automotive and aviation applications. The sensors are commonly "grounded" at the thermocouple junction, through the screw-in plug (EGT) and spark plug ring (CHT), directly to the engine...
I have a dynamic balancer I borrow from time to time, with which I balance the rotors on my helicopter.
It is a small hand-held self-contained unit to which you attach an accelerometer and a photo tach. After a data acquisition cycle, it will report the velocity of the imbalance and the phase...
Thanks to Greg Locock and Klyde for their posts in the original thread.
I have since made progress in my quest to understand the workings of the typical propeller/rotor dynamic balancer, but the original thread was closed, so I started a new thread.
I now have a desktop "rotor simulator"...
The Wavestar software that came with my (now dated) Tektronix TDS220 oscilloscope, which I hadn't ever used, won't install / run on my new computer.
It also doesn't include the specific TDS220 model in the drop-down list of supported instruments, when I install it on an old Win95 box...
I've used several dynamic balancers (Chadwick, DSS and others) on my two-bladed helicopter.
They all provide a velocity reading (ips) at a phase angle (zero to 359 degrees), relative to a opto-electronic trigger that starts (and presumably stops) the acquisition cycle when the "master" blade is...
I need to economically exercise a solid state accelerometer (the Freescale MMA2260), in the lab while writing software for reading and analyzing the data. I would like to "shake" it, on axis, at two frequencies, 8Hz and 43Hz nominally (520rpm and 2600rpm respectively).
The mass of the...
I plan to develope a simple vibration analyzer for a specific experimental helicopters rotors using a small dedicated micro-controller to capture accelerometer and phase angle data for a full revolution. I think I can perform a simple numerical integration, via Newtons method or similar, to...
Can anyone direct me to a source of information relating to methods of controlling belt oscillation on a low RPM, high torque, cog belt system? I suspect all that is needed is idlers and/or guides but have heard horror stories about standing waves turning V-belts inside out, etc., and I think...
I'm investigating the feasability of building an inexpensive instrument for capturing the maximum instantaneous acceleration generated by a helicopter main rotor, relative to the rotational phase angle of the rotor.
Commercially available (read expensive) instruments utilize analog...
I have a need for an inexpensive vibration analyzer, preferably hand-held. Seems to me the utility of inexpensive Palm Pilots could be leveraged as cheap CPU/Display combinations. Ultimately I need average displacent data (inches-per-second) at a specific phase angle. I can marry a circuit...
