... ,ψ )di3' i2 i3 0 1 L11i12 + L22 i2 + L 33 i32 + Mi1i3 cos(φ − ψ ) + Mi2 i3 sin (φ − ψ ) 2 ' ∂Wm Tφ = = − Mi1i3 sin (φ − ψ ) + Mi2 i3 cos(φ − ψ ) ∂φ e ' ∂Wm Tψ = = Mi1i3 sin (φ − ψ ) − Mi2 i3 cos(φ ... + Mi3 cos(φ − ψ ) λ2 = L22 i2 + Mi3 sin (φ − ψ ) 3 = L33i3 + Mi1 cos(φ − ψ ) + Mi2 sin (φ − ψ ) ' Wm = = ∫ i1 ' ' λ1 (i1' ,0,0, φ ,ψ )di1' + ∫ λ (i1 , i2 ,0, φ ,ψ )di2 + ∫ 3 (i1 , i2 , i3' , ... )0.8 = −1 .34 4 x ( ) = x ( ) + ∆t [ f (x ( ) , t )] = 0,8 + 0,1× (− 1 ,34 4 ) = 0,6656 x (n +1) = x (n ) + ∆t f x (n ) , t n 0 0 1 2 1 Tương t , x (4 ) = 0,4 939 x (3 ) = 0,5681 Bài gi ng 32 Ví d 4.22...