TAILIEUCHUNG - Ogata - Modern Control Engineering Part 12

Tham khảo tài liệu 'ogata - modern control engineering part 12', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | where X state vector n-vector u control vector r-vector A n X n constant matrix B n X r constant matrix Obtain the response of the system to each of the following inputs a The r components of u are impulse functions of various magnitudes. b The r components of u are step functions of various magnitudes. c The r components of u are ramp functions of various magnitudes. Solution a Impulse response Referring to Equation 11-43 the solution to the given state equation is--------------------------------------------------------------------------------- x 0 eA i o x to f eA T Bu r íỉr Jr0 Substituting io 0 into this solution we obtain x i eArx 0- f ễa t Bu t íìt Jo- Let us write the impulse input u z as u t ỗ z w where w is a vector whose components are the magnitudes of r impulse functions applied at Í J. The solution of the state equation when the impulse input ổ í w is given at t 0 is x t ỂAíx 0 í eAƠ T BỖ r w dr Jo- eArx 0- eA Bw 11-95 b Step response Let US write the step input u z as u i k where k is a vector whose components are the magnitudes of r step functions applied at f 0. The solution to the step input at t 0 is given by x t - eA f T Bki r o eA x 0 a2 2 At 2 dr Bk eAix 0 At2 2 A2t3 3 If A is nonsingular then this last equation can be simplified to give x z eAix 0 eA - A-1 e-A - I Bk eAix 0 A-1 eAi - I Bk c Ramp response Let US write the ramp input u i as U Z tv 760 11-96 Chapter 11 Analysis of Control Systems in state Space where V is a vector whose components are magnitudes of ramp functions applied at t solution to the ramp input tv given at t 0 is x 0 eAfx 0 I eA t Btv dr e 0 eAix 0 eA l e At7í tBv I _ A - 3A2 4A3 eA x 0 eA0 - 2 3Tf3 4 i4 5Ff5 v If A is nonsingular then this last equation can be simplified to give x 0 eA x 0 A-2 eA - I - At Bv eA x 0 A-2 eAr - I - A-Ir Bv A-ll-7. Obtain the response y t of the following system 11-97 1 1 1 X 1 0 x2 0 1 0 x2 0 0 0 y- i 0 2_ where u t is the unit-step input occurring at t 0 or w 0 - 1 0 .

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