New PDF release: Control Design and Analysis for Underactuated Robotic

By Xin Xin, Yannian Liu

The final twenty years have witnessed significant growth within the learn of underactuated robot platforms (URSs). Control layout and research for Underactuated Robotic Systems provides a unified therapy of keep an eye on layout and research for a category of URSs, which come with structures with multiple-degree-of-freedom and/or with underactuation measure . It provides novel notions, positive factors, layout suggestions and strictly international movement research effects for those structures. those new fabrics are proven to be important in learning the keep watch over layout and balance research of URSs.

Control layout and research for Underactuated robot Systems contains the modelling, keep watch over layout and research awarded in a scientific approach relatively for the next examples:

l at once and remotely pushed Acrobots

l Pendubot

l rotational pendulum

l counter-weighted Acrobot

2-link underactuated robotic with versatile elbow joint

l variable-length pendulum

l 3-link gymnastic robotic with passive first joint

l n-link planar robotic with passive first joint

l n-link planar robotic with passive unmarried joint

double, or parallel pendulums on a cart

l 3-link planar robots with underactuation measure two

2-link loose flying robot

The theoretical advancements are verified through experimental effects for the remotely pushed Acrobot and the rotational pendulum.

Control layout and research for Underactuated Robotic Systems is meant for complicated undergraduate and graduate scholars and researchers within the sector of keep an eye on platforms, mechanical and robotics structures, nonlinear platforms and oscillation. this article will not just permit the reader to achieve a greater figuring out of the ability and basic barriers of linear and nonlinear keep an eye on idea for the regulate layout and research for those URSs, but additionally encourage the reader to handle the demanding situations of extra complicated URSs.

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It provides numerical simulations to validate the presented theoretical results. A part of this work has been published in [102, 114]. 1 Lyapunov Stability Theory Stability theory plays an important role in systems theory and engineering. There are many different kinds of stability issues in studying dynamical systems. For the purpose of this book, in this chapter, we will introduce the knowledge needed in this book about stability of equilibrium points for autonomous systems. We focus on Lyapunov stability theory, and the contents of this section are mainly taken from [30, 39, 78].

The following definition describes some types of equilibrium points. 1) where f : D → Rn is continuously differentiable and D is a neighborhood of the origin. 10). (1) The equilibrium point x = 0 is called hyperbolic if all eigenvalues of A have non-zero real parts; (2) The equilibrium point x = 0 is called non-hyperbolic if A has at least one eigenvalue with zero real part; (3) The equilibrium point x = 0 is called a saddle if all eigenvalues of A have both negative and positive real parts. , [30].

137) b h(a, b, z) + a + 2c + d | sin z| ≤ 2d(a + c + d)h(a, b, z)|z| . 136) holds if and only if h(a, b, z) = 0 holds. 135), using h2 (a, b, z) = (a + b)2 − 2ab(1 − cos z) ≥ (a + b)2 − (a + b)2 (1 − cos z)/2 = (a + b)2 (1 + cos z)/2 = (a + b)2 cos2 (z/2) and |z| ≥ | sin z| for any z, we obtain h2 (a, b, z)z2 − (a + b)2 sin2 z ≥ (a + b)2 cos2 z 2 z2 − 4 sin2 z 2 ≥ 0. 135). 136). When z = 0, the equalities in the above relations hold if and only if a = b and cos z = −1 hold, that is, h(a, b, z) = 0 holds.

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