fastNOT
Electrical
- May 19, 2011
- 1
Hello. I am a trained Electronics technician tasked with verifying and writing vibration test profiles using a controller (with software and PC) and shaker tables / amplifiers. We have 4 shaker tables, 3 controllers and we run all four systems 24-7.
We have a new customer that has increasingly purchased different products across the many lines we offer. For each new purchase we need to qualify environmentally on a lot by lot basis this customers parts.
The problem is this. All of the newest purchases specify a shock test to be performed to table X parameters. Table x is a SRS graph with G peak y-axis and Frequency (log) for the x-axis, with 3 coords defined on the graph.
Everything I have read here for the last 3 days has given me GREAT information if I wanted to take data from a classical shock or a pulse shock and convert it into a SRS graph format. I have tried to work backwards from that information to produce a 1/2 sine pulse with amplitude in peak and PW = duration in sec that would be an equivalent (correct word?) to the specified SRS profile. My math background lets me know a formula when I see it, allows me to manipulate a variable around the formula, but I get lost when I try to redefine the variables within a formula unless it's straight algebra.
My question is obviously, Can I perform a impact hammer shock test to satisfy a specified SRS parameter, and if so, will my math background get me through all the different spec's to write these profile specs?
The best I can figure out so far is if I take each coord
(G , freq), and convert it into a 1/2 sine (pk and pulse width) and then superimpose the 3 1/2 sine pulses on top of each other, and use something akin to a graphic merge layers function to develop the final pulse wave....Is this even CLOSE?
Thanks in advance for any help.
We have a new customer that has increasingly purchased different products across the many lines we offer. For each new purchase we need to qualify environmentally on a lot by lot basis this customers parts.
The problem is this. All of the newest purchases specify a shock test to be performed to table X parameters. Table x is a SRS graph with G peak y-axis and Frequency (log) for the x-axis, with 3 coords defined on the graph.
Everything I have read here for the last 3 days has given me GREAT information if I wanted to take data from a classical shock or a pulse shock and convert it into a SRS graph format. I have tried to work backwards from that information to produce a 1/2 sine pulse with amplitude in peak and PW = duration in sec that would be an equivalent (correct word?) to the specified SRS profile. My math background lets me know a formula when I see it, allows me to manipulate a variable around the formula, but I get lost when I try to redefine the variables within a formula unless it's straight algebra.
My question is obviously, Can I perform a impact hammer shock test to satisfy a specified SRS parameter, and if so, will my math background get me through all the different spec's to write these profile specs?
The best I can figure out so far is if I take each coord
(G , freq), and convert it into a 1/2 sine (pk and pulse width) and then superimpose the 3 1/2 sine pulses on top of each other, and use something akin to a graphic merge layers function to develop the final pulse wave....Is this even CLOSE?
Thanks in advance for any help.
