tag:blogger.com,1999:blog-8014888555955763990.post5617255868729209188..comments2012-01-27T00:09:12.447-08:00CC Dharmanihttp://www.blogger.com/profile/13217855743473839524noreply@blogger.comBlogger11125tag:blogger.com,1999:blog-8014888555955763990.post-88723070765565271792012-01-27T00:09:12.447-08:002012-01-27T00:09:12.447-08:00Hi sir, this is praneeth from GITAM University... we&#39;re working on your paper in the isoi journal i.e.Angular position measurement of a rotating platform using a solid-state gyroscope...<br />we would be really honored if you could please assist us with the said...Praneethhttp://www.blogger.com/profile/01793093082990080021noreply@blogger.comtag:blogger.com,1999:blog-8014888555955763990.post-63184342946276536302009-03-21T05:52:00.000-07:002009-03-21T05:52:00.000-07:00ADXL150 is an accelerometer, not gyro. That one also has got obsolete,<BR/>the replacement is ADXL78 accelerometer.<BR/>Check out here:<BR/>http://www.analog.com/en/mems-and-sensors/imems-accelerometers/adxl78/products/product.htmlCC Dharmanihttp://www.blogger.com/profile/13217855743473839524noreply@blogger.comtag:blogger.com,1999:blog-8014888555955763990.post-28729419500065658682009-03-21T05:46:00.000-07:002009-03-21T05:46:00.000-07:00can u please sujjest some place where i can get adxl150 gyro. ive tried to get it from analog devices but failed.............Niteshhttp://www.blogger.com/profile/03703854273386449295noreply@blogger.comtag:blogger.com,1999:blog-8014888555955763990.post-86304267381791206012009-03-21T05:32:00.000-07:002009-03-21T05:32:00.000-07:00Hi Nitesh,<BR/>analog devices has put the ADXRS150 in obsolete list. They've come up with it's replacement ADXRS163, check out here:<BR/>http://www.analog.com/en/mems-and-sensors/imems-gyroscopes/adxrs613/products/product.htmlCC Dharmanihttp://www.blogger.com/profile/13217855743473839524noreply@blogger.comtag:blogger.com,1999:blog-8014888555955763990.post-32242209626120886242009-03-21T05:25:00.000-07:002009-03-21T05:25:00.000-07:00recently im working on a robotic arm project which involves use of adxl150 gyro. can u sujjest any place wr i can get this mems device. ive tried analog devices but failed.Niteshhttp://www.blogger.com/profile/03703854273386449295noreply@blogger.comtag:blogger.com,1999:blog-8014888555955763990.post-12069578752154673482008-12-14T01:35:00.000-08:002008-12-14T01:35:00.000-08:00Hi Seemanta,<BR/>Thanks a lot for the comment!CC Dharmanihttp://www.blogger.com/profile/13217855743473839524noreply@blogger.comtag:blogger.com,1999:blog-8014888555955763990.post-4083475131657616592008-12-13T13:56:00.000-08:002008-12-13T13:56:00.000-08:00Hi Dharmani,<BR/>I really like your site. I was a fan of the AT89S52 until recently I started to use the AVR series. AVR rocks! and your website too !<BR/><BR/>Keep up the good work !<BR/><BR/>regards,<BR/>Seemanta (seemanta at g m a i l dot org)Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-8014888555955763990.post-71887182816636107662008-11-24T05:15:00.000-08:002008-11-24T05:15:00.000-08:00Hi Aaron,<BR/>that's really a very informative link. Thank you. I'd like to give a try balancing the inverted pendulum!!<BR/>In my gyroscope problem, I've tested the VCO and other circuits connected for processing the gyro output. VCO was perfect but there were variation in the opamp outputs. So I've replaced them with better ones (more immune to noise).<BR/>Also, the gyro PCB is enclosed in metallic casing, which has further reduced the drift. So, for the moment it's within specification.<BR/>I'm still working on accelerometers on different project,so got busy there. I'm going to use it with the gyro shortly for my experiments, though I'm afraid of the integration with Kalman filter! :) It looks like lot of mathematics is involved!!<BR/><BR/>Thanks.CC Dharmanihttp://www.blogger.com/profile/13217855743473839524noreply@blogger.comtag:blogger.com,1999:blog-8014888555955763990.post-51736034441137106222008-11-23T20:10:00.000-08:002008-11-23T20:10:00.000-08:00I'm not sure if you have solved this problem but there are some decent leas to answering the drift problem using an accelerometer/gyro combo and integrating the data with a Kalman filter. There are also ready made code packages in C if you're using the Atmel. <BR/><BR/>Check out this page:<BR/><BR/>http://geology.heroy.smu.edu/~dpa-www/robo/nbot/<BR/><BR/>I'm working on something similar right now and the learning curve is steep for me...with very little experience in electronics, but what fun!!<BR/><BR/>bringFire@gmail.comAaron Ryanhttp://www.blogger.com/profile/05037840608346268124noreply@blogger.comtag:blogger.com,1999:blog-8014888555955763990.post-48321214406016648712008-11-09T21:43:00.000-08:002008-11-09T21:43:00.000-08:00Hi MSJ,<BR/>thanks for the suggestion. <BR/>By IR detectors you must be meaning to use rotary encoders or such other encoder for getting position. The method of using gyroscope is somewhat complicated, accepted, but in my project mounting of the sensor is allowed only on the top surface of the rotary platform, no interface between rotor and stator. So I had to go with this method.<BR/>Right now I'm trying an accelerometer for another project. I'll surely look for a way to use it along with gyro, as you said, to make corrections in the drift for longer durations.<BR/>Thanks.CC Dharmanihttp://www.blogger.com/profile/13217855743473839524noreply@blogger.comtag:blogger.com,1999:blog-8014888555955763990.post-14428785888121979082008-11-09T08:20:00.000-08:002008-11-09T08:20:00.000-08:00I saw your question on the electronic forum about using the gyro for longer period of times as a position measurement. I don't have an account there so I am posting here.<BR/><BR/>I don't think its possible; or rather easy to do. I would suggest a next step to look into combining an accelerometer and a gyroscope. This way between the two of them they can "correct" each other and get better values. Errors might still build, which makes integrating not fun at all.<BR/><BR/>Good luck with the project. I personally am looking into using IR detectors for location information as this method seems to complicated for me.<BR/><BR/>MSJShlomo (msj121)http://www.blogger.com/profile/12781761752092593956noreply@blogger.com