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Assignment 2 Solution




Question 1: A robot-arm drive system for one joint can be represented by the di erential equation




dv(t)

dt = k1v(t) k2y(t) + k3i(t)







where v(t) = velocity, y(t) = position, and i(t) is the control-motor current (Hint: i(t) = u(t)). Put the equations in state variable form and set up the matrix form for k1 = k2 = 1.




Question 2: The state space representation of a dynamical system is given as




X0 (t) = AX(t) + BU(t)




Y (t) = CX(t) + DU(t)




Prove that:

h Z t i

Y (t) = C (t)X(0) + (t ):B:U( )d + DU(t)




0




where (t) = eAt is the fundamental or state transition matrix.




Following problems are from the text book:




Question 3: 2.1




Question 4: 2.3




Question 5: 2.6




Question 6: 2.14




Question 7: 2.15




Question 8: 2.20













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