M. Hamdaoui

Nth-harmonic synchronous response and stability in a weakly perturbed Mathieu–Liénard oscillator with nonlinear dissipation

Finite-state stiffness programming under stroke and electrical-load constraints forvery-low-frequency electromagnetic energy harvesters

Very-low-frequency vibration energy harvesters are constrained simultaneously by resonance detuning, finite electromechanical coupling, allowable stroke and retuning energy. This study asks how much structural stiffness programming adds once the electrical load is optimized under the same physical limits. Delivered p...

Energetic frontier theory for smart piezoelectric structures with coupled vibration attenuation and energy harvesting

Piezoelectric energy harvesters and shunted smart structures are often analyzed separately as power generators and vibration absorbers, even though both functions arise from the same electromechanical coupling. This paper asks a joint design question: for a prescribed residual-vibration level, what is the largest usefu...

Reliability Inference for Semi-Markov Models based on Multiple Trajectories

We develop nonparametric inference for reliability indicators of discrete-time semi-Markov systems from independent trajectories observed over a common fixed horizon. Augmenting the physical state by the backward recurrence time yields a finite coupled Markov representation on the observed age range. We distinguish the...