7 research outputs found
A data-driven model inversion approach to cancer immunotherapy control
A novel data-driven control design approach for Multiple Input Multiple Output nonlinear systems is proposed in the paper, relying on the identification of a polynomial prediction model of the system to control and its on-line inversion. A simulated study is then presented, concerning the design of a control strategy for cancer immunotherapy. This study shows that the proposed approach may be quite effective in treating cancer patients, and may give results similar to (or perhaps better than) those provided by “standard” methods. The fundamental difference is that “standard” methods are typically based on the unrealistic assumption that an accurate physiological model of the cancer-immune mechanism is avail- able; in the approach proposed here, the controller is designed without such a strong assumption
A data-driven approach to nonlinear braking control
In modern road vehicles, active braking control
systems are crucial elements to ensure safety and lateral
stability. Unfortunately, the wheel slip dynamics is highly
nonlinear and the on-line estimation of the road-tire conditions
is still a challenging open research problem. These facts make
it difficult to devise a braking control system that is reliable
in any situation without being too conservative. In this paper,
we propose the Data-Driven Inversion Based Control (D2-IBC)
approach to overcome the above issues. The method relies on
a two degrees of freedom architecture, with a linear controller
and a nonlinear controller in parallel, both designed using only
experimental data. The effectiveness of the proposed approach
is shown by means of an extensive simulation campaign
Data-driven inversion-based control of nonlinear systems
In this paper, we introduce the Data-Driven Inversion-Based Control (D2-IBC)
method for nonlinear control system design. The method relies on a two degree-of-freedom
architecture, with a nonlinear controller and a linear controller running in parallel, and does not
require any detailed physical knowledge of the plant to control. Specically, we use input/output
data to synthesize the control action by employing convex optimization tools only. We show the
eectiveness of the proposed approach on a simulation example, where the D2-IBC performance
is also compared to that of the Direct FeedbacK (DFK) design approach, a benchmark method
for nonlinear controller design from data
Design of Experiments for Nonlinear System Identification
L'abstract è presente nell'allegato / the abstract is in the attachmen
Parametric and nonparametric curve fitting
We are concerned with convergence issues in the identification of a static nonlinear function. Our investigation focuses on properties of the input signal that ensure convergence of the estimate. Both parametric and nonparametric approaches are considered. In the parametric case, we offer sufficient conditions under which the estimated parameters converge to their true values almost surely. For the nonparametric case, we offer necessary and sufficient conditions under which the estimated function converges almost surely to the true nonlinearity
Parametric and nonparametric curve fitting
We are concerned with convergence issues in the identification of a static nonlinear function. Our investigation focuses on properties of the input signal that ensure convergence of the estimate. Both parametric and nonparametric approaches are considered. In the parametric case, we offer sufficient conditions under which the estimated parameters converge to their true values almost surely. For the nonparametric case, we offer necessary and sufficient conditions under which the estimated function converges almost surely to the true nonlinearity