Read e-book online Block Backstepping Design of Nonlinear State Feedback PDF

By Shubhobrata Rudra, Ranjit Kumar Barai, Madhubanti Maitra

This ebook offers a unique, generalized method of the layout of nonlinear kingdom suggestions keep watch over legislation for a wide classification of underactuated mechanical structures in line with program of the block backstepping process. The keep an eye on legislation proposed this is powerful opposed to the consequences of version uncertainty in dynamic and steady-state functionality and addresses the difficulty of asymptotic stabilization for the category of underactuated mechanical structures.
An underactuated process is outlined as one for which the measurement of house spanned through the configuration vector is larger than that of the distance spanned via the regulate variables. keep watch over difficulties bearing on underactuated structures presently symbolize an lively box of analysis as a result of their vast diversity of functions in robotics, aerospace, and marine contexts. The ebook derives a generalized concept of block backstepping keep an eye on layout for underactuated mechanical platforms, and examines a number of case stories that hide attention-grabbing examples of underactuated mechanical structures. The mathematical derivations are defined utilizing recognized notations and straightforward algebra, with out the necessity for any distinctive earlier historical past in greater arithmetic. The chapters are lucidly defined in a scientific demeanour, beginning with keep an eye on process preliminaries and relocating directly to a generalized description of the block backstepping strategy, earlier than turning to a number of case experiences. Simulation and experimental effects also are supplied to help in reader comprehension.

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Read Online or Download Block Backstepping Design of Nonlinear State Feedback Control Law for Underactuated Mechanical Systems PDF

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Extra info for Block Backstepping Design of Nonlinear State Feedback Control Law for Underactuated Mechanical Systems

Example text

In above definitions, “col” denotes the column vector. Actually, f1(q, p) and f2(q, p) are the nonlinear functions of q and p defined as f1 ðq; pÞ : R4 ! R and f2 ðq; pÞ : R4 ! R. In addition g1(q) and g2(q) are the functions of the output variables (q1, q2) defined as g1 ðqÞ : R2 ! R and g2 ðqÞ : R2 ! R. Also f1(q, p), f2(q, p), g1(q) and g2(q) are all C1 functions. It implies all the four above-mentioned functions are differentiable, and they have continuous time derivatives. In addition, f1 ð0; 0Þ ¼ 0 and f2 ð0; 0Þ ¼ 0.

14) transforms the closed loop system in the state model of Eq. 13). 3 37 Zero Dynamics Analysis of 2-DOF Underactuated Mechanical System Systematic derivation of the proposed control law for the 2-DOF UMS has been presented in Sect. 2. Expression of the control input is shown in Eq. 14). However, a minute observation on the proposed control law reveals that the control law [described in Eq. 14)] only ensures the stability of the transformed system in z1, z2 coordinate system [4]. Nonetheless, the algebraic state transformation has just converted the original fourth order underactuated state model of Eq.

27). Moreover, there exists a state feedback control law as given in Eq. 43), which ensures the global stabilization of the equilibrium for the underactuated system. e. the transformation of the underactuated system in block-strict feedback form) can be proved by direct calculation. Since it has already been established in the last section that global diffeomorphism is automatically ensured, it can be concluded that the invertibility of w ensures existence of the proposed state feedback control law.

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