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Mechanical Systems and Signal Processing
IF
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5414
Papers 5696
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#1Baofeng Ji (University of Electronic Science and Technology of China)H-Index: 1
#2Zhenzhen Chen (HAUST: Henan University of Science and Technology)
Last.Hong Wen (University of Electronic Science and Technology of China)H-Index: 7
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Abstract For the ambient backscatter communication system, a joint optimization algorithm based on the energy efficiency maximization criterion was proposed in this paper by designing a two-hop wireless information and energy transmission scheme. The source side of this system was configured with multiple antennas and employed Max Ratio Transmission (MRT) precoding method. The relay node (hot spots or tag node) utilized the power split approach to transmit information and harvest energy. In allu...
#1Lin Geng (Anda: Anhui University)H-Index: 1
#2Liang Yu (SJTU: Shanghai Jiao Tong University)H-Index: 1
Last.Yun-Hao Dai (Anda: Anhui University)
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Abstract A multistep acoustic method is extended to suppress the more serious instability in the inverse process between the time-evolving pressure on the hologram plane and the time-wavenumber acceleration spectrum on the virtual source plane, and further stabilizes the reconstruction of the instantaneous vibration of an exciting planar structure. In the extended method, the solving equation relating the time-evolving pressure to the time-wavenumber acceleration spectrum at each time step is fi...
#1S.K. Sahu (NITR: National Institute of Technology, Rourkela)
#2P. Das (NITR: National Institute of Technology, Rourkela)
Abstract Composite beams are increasingly used in aerospace, automobile, and other applications. Crack is the most common defect in structures during its service life. The cracked composite beams are subjected to dynamic loads and the vibration of the cracked beams is of technical significance to the structural integrity of systems. The objective of the present investigation is to demonstrate the vibration characteristics of a laminated composite beam (LCB) with multiple transverse cracks. Finit...
#1Shengqin Li (NEFU: Northeast Forestry University)
#2Xinyuan Feng (NEFU: Northeast Forestry University)
Abstract The intensity analysis was proposed for a certain all-aluminum vehicle body-in-white, and an optimistic method of the vehicle body was carried out based on lightweight target. The finite element model of vehicle body-in-white was established, and the flexural rigidity and torsional rigidity of the vehicle body are calculated according to the actual operating conditions of the vehicle. The flexural rigidity and torsional rigidity of the vehicle body are calculated, and the main opening d...
#1Ali Noormohammadi-Asl (KNTU: K.N.Toosi University of Technology)
#2Omid Esrafilian (KNTU: K.N.Toosi University of Technology)H-Index: 2
Last.Hamid D. Taghirad (KNTU: K.N.Toosi University of Technology)H-Index: 21
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Abstract The attitude control of a quadrotor is a fundamental problem, which has a pivotal role in a quadrotor stabilization and control. What makes this problem more challenging is the presence of uncertainty such as unmodelled dynamics and unknown parameters. In this paper, to cope with uncertainty, an H ∞ control approach is adopted for a real quadrotor. To achieve H ∞ controller, first a continuous-time system identification is performed on the experimental data to encapsulate a nominal mode...
Abstract One of the most important issues arising in the use of acoustic emission (AE) for nondestructive process monitoring is the accurate identification of potential process malfunctions to avoid premature failure. In some cases, the AE signals from malfunction sources are relatively weak, with high levels of background noises. Thus, these signals could easily be submerged, making it rather difficult to separate them. Therefore, it is of critically importance to find a solution to the problem...
#1Yuxin Su (Xidian University)H-Index: 9
#2Chunhong Zheng (Xidian University)H-Index: 4
Last.Paolo MercorelliH-Index: 13
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Abstract This paper addresses the problem of robust trajectory tracking for uncertain robot manipulators within a priori fixed-time. A new sliding surface is first proposed and a robust control is developed for ensuring global approximate fixed-time convergence. Global approximate fixed-time convergence of tracking errors is proven that the position tracking errors globally converge to an arbitrary small set centered on zero within a uniformly bounded time and then go to zero exponentially. It i...
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