Abstract: In this paper, we propose direct and indirect adaptive fuzzy sliding mode control approaches for a class of nonaffine nonlinear systems. In the direct case, we use the implicit function theory to prove the existence of an ideal implicit feedback linearization controller, and hence approximate it to attain the desired performances. In the indirect case, we exploit the linear structure ...

Experiments have shown that elasticity of disordered filamentous networks with compliant crosslinks is very different from networks with rigid crosslinks. Here, we model and analyze filamentous networks as a collection of randomly oriented rigid filaments connected to each other by flexible crosslinks that are modeled as wormlike chains. For relatively large extensions we allow for enthalpic st...

This paper presents a control methodology that enables nonlinear model-based control of pulse width modulated (PWM) pneumatic servo actuators. An averaging approach is developed to describe the equivalent continuous-time dynamics of a PWM controlled nonlinear system, which renders the system, originally discontinuous and possibly nonaffine in the input, into an equivalent system that is both co...

In this paper, direct adaptive neural network (NN) control is developed for a class of multi-input and multi-output (MIMO) nonlinear systems in discrete-time. To solve the difficulty of nonaffine appearance of control, implicit function theorem is exploited to assert the existence of an ideal desired feedback control (IDFC). Then, high-order-neural-network (HONN) is employed to approximate the ...

We propose a nonlinear extension of the standard tube model for semidilute solutions of freely-sliding semiflexible polymers. Nonaffine filament deformations at the entanglement scale, the renormalisation of direct interactions by thermal fluctuations, and the geometry of large deformations are systematically taken into account. The stiffening response predicted for athermal solutions of stiff ...

Experimental measurements of contact forces are limited to spheres and disks in three two dimensions, making the evaluation shape effect universality force distributions comparison between experiments theories extremely difficult. Here we present precise vector photoelastic ellipses subject isotropic compression pure shear. We find local, instead global, stress ratio controls width for larger t...

This paper deals with the problem of fault-tolerant control for a class perturbed nonlinear systems non-affine actuator faults. Fuzzy are integrated into design law to get rid system nonlinearities and considered Two adaptive controllers proposed in order reach objective ensure stability. The first term is an controller involved mollify uncertainties Therefore, second known as robust introduced...