Gender

Male

Gender

Male

Location

shanghai

About Me:

a newer to UAV

Please tell us a bit about your UAV interest

dcm

Hometown:

ShangHai

"Bill

thanks very much .

I got it.

that's very helpful.

thanks"

thanks very much .

I got it.

that's very helpful.

thanks"

"Dear Bill

"Magnetometer is used for yaw compensation."

I think there is little mentioned about this approach in your DcmDraft paper

would you please give more information about how to compensate the yaw correction by Magnetometer?

Thanks"

"Magnetometer is used for yaw compensation."

I think there is little mentioned about this approach in your DcmDraft paper

would you please give more information about how to compensate the yaw correction by Magnetometer?

Thanks"

"Very sorry to trouble you so many times. I have understood and let me answer some of the question myself.

>question 2: >we take the cross product Z row of estimated DCM with the gravity reference vector

>and if the result is not ZERO, you call it…"

>question 2: >we take the cross product Z row of estimated DCM with the gravity reference vector

>and if the result is not ZERO, you call it…"

"additional question

regarding COG and roll-axis, we only need the Z component

while gravity and Z row of DCM, we nee the whole cross product

may i know the reason"

regarding COG and roll-axis, we only need the Z component

while gravity and Z row of DCM, we nee the whole cross product

may i know the reason"

"Dear I have new questions

regarding the RollPitchCorrection ,we use the accelerometer to obtain a gravity reference vector

question 1:

when we use it ,is there an assumption made that the plane keep going forward in a horizontal level?

question…"

regarding the RollPitchCorrection ,we use the accelerometer to obtain a gravity reference vector

question 1:

when we use it ,is there an assumption made that the plane keep going forward in a horizontal level?

question…"

"Dear I have new questions regarding the RollPitchCorrection we use the accelerometer to obtain a reference vector ( the Z-axis in plane frame) and the assumption is made that the"

"new diagramIMG_20160422_125659.jpg"

"new draft"

"Dear I reviewed the Eqn14~17 which someone feels confused maybe. would it be better if we add some tips or comments about this setction 1. the θ(x/y/z) in the matrix of Eqn 17 stands for the magnitude of the Vector : dt * W(x/y/z) X r(t) not the…"

"Dear

Thanks very much for your elaborate answer.

I can understand it now.

Thanks"

Thanks very much for your elaborate answer.

I can understand it now.

Thanks"

"sorry for the stupid question .

I have known it .

the sign is negative if exchange the cross product of them"

I have known it .

the sign is negative if exchange the cross product of them"

"Additions:

for example. the x-axis has the whole Centrigual acceleration(Vector C). the Gravity works in z-axis (Vector G)

under this condition. the Accelerometer will output the result Vetor A = C + G

so if we want to get the G, we need A-C,but…"

for example. the x-axis has the whole Centrigual acceleration(Vector C). the Gravity works in z-axis (Vector G)

under this condition. the Accelerometer will output the result Vetor A = C + G

so if we want to get the G, we need A-C,but…"

"Dear

Regarding the Eqn 26 in the paper(DcmDraft2)

I think

the acceleromter is aligned with the plane(body).so its output is the combination result of gravity and centrigual acceleration.

and we only need the gravity acceleration as our reference…"

Regarding the Eqn 26 in the paper(DcmDraft2)

I think

the acceleromter is aligned with the plane(body).so its output is the combination result of gravity and centrigual acceleration.

and we only need the gravity acceleration as our reference…"

"Dear Bill

quote:

the bottom row of the direction cosine matrix should be aligned with the vector produced by the accelerometers

May I know the reason why these two vectors should be aligned ?under what condition?

because,from the earth frame. the…"

quote:

the bottom row of the direction cosine matrix should be aligned with the vector produced by the accelerometers

May I know the reason why these two vectors should be aligned ?under what condition?

because,from the earth frame. the…"

"Dear Bill

I'm reading your perfect paper(DcmDraft2)

please let me ask a problem if I may.

in the paper, we got "a convenient matrix form" in Eqn 17

we know the new "DCM“ is not a definite DCM for its magnitude is not 1 ,and each vector member is…"

I'm reading your perfect paper(DcmDraft2)

please let me ask a problem if I may.

in the paper, we got "a convenient matrix form" in Eqn 17

we know the new "DCM“ is not a definite DCM for its magnitude is not 1 ,and each vector member is…"