Author
Zehao Hou
Bio: Zehao Hou is an academic researcher from Xi'an Jiaotong University. The author has contributed to research in topics: Energy harvesting & Nonlinear system. The author has an hindex of 2, co-authored 6 publications receiving 8 citations.
Papers
More filters
••
TL;DR: In this article, the authors presented a Halbach array enhanced electromagnetic energy harvester with swing pendulum to maximally exploit the limb swing excitations to improve comfort and wearability during human motion.
44 citations
••
TL;DR: A multi-parameter theoretical analysis is conducted to improve the performance of an energy harvesting backpack composed of a spring, mass, electromagnetic motor, and rack-pinion-based power takeoff and results demonstrate that the optimal carried mass and external resistance for generating the maximum power output are determined by the total damping of the mechanical system and electrical circuit.
19 citations
•
15 citations
••
TL;DR: In this article, a two-stage subspace method is proposed to identify the critical parameters in the system equation of nonlinear bistable piezoelectric structures, where the dynamic equation is separated into an underlying linear electromechanical coupling equation and a nonlinear mechanical equation.
Abstract: System parameters identification of nonlinear bistable structures has attracted considerable interest because the performance enhancement of energy harvesting and vibration control is significantly dependent on the model parameter of nonlinear systems. Therefore, a two-stage subspace method is proposed to identify the critical parameters in the system equation of nonlinear bistable piezoelectric structures. The dynamic equation of nonlinear bistable piezoelectric structures is separated into an underlying linear electromechanical coupling equation and a nonlinear mechanical equation. At first, for the underlying linear electromechanical coupling equation, a force–displacement subspace is constructed to identify the linear mass, damping and stiffness. Meanwhile, a velocity–voltage subspace is created for the identification of the electromechanical coupling coefficient. Next, for the nonlinear mechanical equation, the nonlinear restoring force in bistable structures can be estimated by the extended nonlinear frequency response function. Numerical simulation on a magnetic coupled bistable piezoelectric structure is performed to investigate the influence of frequency-swept responses, the noise intensity and polynomial order on identification accuracy. Experimental measurement of a magnetic coupled asymmetric bistable piezoelectric beam is conducted under different excitation conditions. Experimental results demonstrate the effectiveness of the proposed identification method.
11 citations
Cited by
More filters
01 Jun 2006
TL;DR: The combined deterministic-stochastic subspace identification algorithm for the experimental modal analysis of mechanical structures is discussed and the main advantages of OMAX over OMA are that the modes that are excited by the artificial forces can be scaled to unity modal mass and that a higher number of modes can be identified.
Abstract: In this paper, the use of the combined deterministic-stochastic subspace identification algorithm for the experimental modal analysis of mechanical structures is discussed. The algorithm requires artificial forces to be applied to the structure, so it can be used for experimental modal analysis (EMA). The algorithm can also be used for operational modal analysis (OMA), since the excitation level of the artificial force(s) can be low compared to the excitation level of the ambient forces. Both the modes that are artificially excited and those that are excited by the ambient forces are identified. This type of operational modal analysis is called an OMAX analysis (Operational Modal Analysis with eXogenous inputs) [1]. The main advantages of OMAX over OMA are that the modes that are excited by the artificial forces can be scaled to unity modal mass and that a higher number of modes can be identified.
309 citations
••
TL;DR: In this article, an arc-shaped piezoelectric sheet between the outer race of rolling bearing and bearing pedestal was installed to scavenge rotational energy from rotating machines.
102 citations
••
TL;DR: In this article , an arc-shaped piezoelectric sheet between the outer race of rolling bearing and bearing pedestal was installed to scavenge rotational energy from rotating machines.
80 citations
••
TL;DR: In this paper , a novel dynamically synergistic regulation mechanism is proposed for rotation energy harvesting under the guidance of the dynamic regulation evolution, where nonlinear magnetic force and variable stiffness (centrifugal stiffening effect and penalty stiffness of adaptive-anastomotic barricades) synergistically regulate the dynamic behavior of the system.
41 citations
••
TL;DR: In this article, a novel dynamically synergistic regulation mechanism is proposed for rotation energy harvesting under the guidance of the dynamic regulation evolution, which includes nonlinear magnetic force and variable stiffness (centrifugal stiffening effect and penalty stiffness of adaptive-anastomotic barricades) synergistically regulate the dynamic behavior of the system.
41 citations