SophiaPretty

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Category > Computer Science Posted 08 Jan 2018 My Price 6.00

pitch controller with the output u3 yaw controller

hello

to tune the pid controller
i have make a matlab model for the quadrotor
that have 4 inputs (angular velocity of motor)
w1
w2
w3
w4

i have 4 pid :
altitude controller with the output u1
roll controller with the output u2
pitch controller with the output u3
yaw controller with the output u4

we have that

b=trust factor
d=drag factor

w1^2=(1/4*b)*u1 + (1/2*b)*u3 + (1/4*d)*u4
w2^2=(1/4*b)*u1 - (1/2*b)*u3 + (1/4*d)*u4
w3^2=(1/4*b)*u1 + (1/2*b)*u2 - (1/4*d)*u4
w4^2=(1/4*b)*u1 - (1/2*b)*u2 - (1/4*d)*u4

so to get w1 w2 w3 w4 we use sqrt() but the problem the pid output can be negative so when we use sqrt
it will give complexe number.
please help me to solve this problem
thank you

 

Answers

SophiaPretty
(5)
Status NEW Posted 08 Jan 2018 01:01 PM My Price 6.00

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