Advanced Control of Wheeled Inverted Pendulum Systems by Zhijun Li

By Zhijun Li

Advanced keep watch over of Wheeled Inverted Pendulum Systems is an orderly presentation of contemporary principles for overcoming the problems inherent within the regulate of wheeled inverted pendulum (WIP) structures, within the presence of doubtful dynamics, nonholonomic kinematic constraints in addition to underactuated configurations. The textual content leads the reader in a theoretical exploration of difficulties in kinematics, dynamics modeling, complicated keep an eye on layout options and trajectory iteration for WIPs. a tremendous problem is the best way to take care of numerous uncertainties linked to the nominal version, WIPs being characterised via volatile stability and unmodelled dynamics and being topic to time-varying exterior disturbances for which exact versions are demanding to return by.

The publication is self-contained, providing the reader with every thing from mathematical preliminaries and the elemental Lagrange-Euler-based derivation of dynamics equations to varied complex movement keep an eye on and strength regulate methods in addition to trajectory new release technique. even if basically meant for researchers in robot regulate, Advanced regulate of Wheeled Inverted Pendulum platforms will even be worthwhile interpreting for graduate scholars learning nonlinear platforms extra generally.

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73) is globally asymptotically stable (GAS). 73) satisfy V˙ (x) ≤ −W (x), where W (x) is a positive definite function. 74) ∂x This is a difficult problem. 74) because of a poor choice of V (x) and W (x). A system for which a good choice of V (x) and W (x) exists is said to possess a control Lyapunov function (CLF). 78) The main drawback of the CLF concept as a design tool is that for most nonlinear systems a CLF is not known. The task of finding an appropriate CLF may be as complex as that of designing a stabilizing feedback law.

Adn−1 f g1 , . . 94) With the control Lie algebra concept, we can show that the following theorem is true and is also a general effective testing criterion for system controllability. 89) is controllable if and only if dim(Δ) = dim(Ωx ) = n. Note that because each element in Δ is a function of x, the dimension of Δ may be different from one point to another. 89) is locally controllable. On the other hand, if the condition of dimension can cover all of region Ωx , then it is globally controllable.

Nkj (q, q) ˙ = −nj k (q, q), ˙ if C(q, q) ˙ is defined using the Christoffel symbols. 16 Since M(q) and therefore M(q) are symmetric matrices, the skew˙ ˙ symmetry of the matrix M(q)−2C(q, q) ˙ can also be seen from the fact that M(q) = T C(q, q) ˙ + C (q, q). 17 The system is passive from τ to q. 18 Even though the skew-symmetry property of N (q, q) ˙ is guaranteed ˙ if C(q, q) ˙ is defined by the Christoffel symbols, it is always true that q˙ T [M(q) − 2C(q, q)] ˙ q˙ = 0. , there exists a nonlinear transformation such that the transformed system is a linear controllable system.

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Advanced Control of Wheeled Inverted Pendulum Systems by Zhijun Li
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