A wide class of mechanical systems with uncertainties can be modeled through a state equation in parametric-pure-feedback form. Thus, in principle, the well-known backstepping design procedure can be applied to solve a regulation or a tracking problem. Yet, this is no more possible if a clear parametric dependence on the control signal (torque or force) cannot be established. Systems to which this happens can be efficaciously controlled via the proposed approach which inherits n−1 steps of the classical backstepping procedure. This latter procedure is used to attain a partial system state transformation, completed with the construction of a suitable sliding manifold upon which a second order sliding mode is enforced. [S0022-0434(00)01901-8]
Issue Section:
Technical Papers
Keywords:
nonlinear dynamical systems,
control systems,
uncertain systems,
feedback,
adaptive control,
variable structure systems
Topics:
Algorithms,
Design,
Feedback,
Stability,
Trajectories (Physics),
Uncertainty,
Signals,
Manifolds
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. Copyright © 2000
by ASME
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