Aerothermoelastic flutter analysis and active vibration suppression of nonlinear composite laminated panels with time-dependent boundary conditions in supersonic airflow

Abstract

Aerothermoelastic flutter properties of nonlinear composite laminated panels in supersonic airflow are studied, and investigations on active flutter and aerothermal postbuckling suppression for the panels with time-dependent boundary conditions are also carried out using macro fiber composite actuator and sensor. The von Karman strain–displacement relation in conjunction with the supersonic piston theory is applied in structural modeling. Nonlinear dynamic equations of motion for the structural system are established using Hamilton’s principle and the assumed mode method. Frequency- and time-domain methods are used to investigate the aerothermoelastic characteristics and active flutter and aerothermal postbuckling suppression of the panels. Effects of aspect ratio and ply angle on the nonlinear aerothermoelastic behaviors are studied. The displacement feedback control is used to conduct the active flutter and postbuckling suppression. The nonlinear output controller consisting of a linear quadratic regulator and a nonlinear state estimator of extended Kalman filter is also used in designing the controller. Controlled vibration responses of the structural system under the two different controllers are compared. The results show that the developed linear quadratic regulator/extended Kalman filter controller is more effective than the displacement feedback control controller in flutter and postbuckling control of the panels with time-dependent boundary conditions in supersonic airflow.

Recent progress on flutter‐based wind energy harvesting

“…Flutter is a common topic in the aviation field. For aviation structures, the phenomenon of flutter must be avoided 100–102 . The energy harvesting structure can be regarded as an energy dissipation mechanism 103 .…”

“…For aviation structures, the phenomenon of flutter must be avoided. [100][101][102] The energy harvesting structure can be regarded as an energy dissipation mechanism. 103 The application of energy harvesters to the research on the integration of vibration suppression and energy harvesting of aircraft structures is very promising.…”

Aeroelastic analysis and flutter control of wings and panels: A review

“…Numerical results revealed that the LQG controller is more effective than the proportional feedback controller in flutter suppression, and the optimal locations by the genetic algorithm can effectively increase the flutter bounds. In addition, Chai et al 269 also carried out the active flutter suppression analysis of composite laminated panels with time‐dependent boundary conditions in supersonic airflow using the proportional feedback and LQR with extended Kalman filter control methods. Based on the LQR control algorithm, Fazelzadeh and Jafari 270 designed an active optimal controller to suppress the flutter of the panel in supersonic airflow under gust disturbance effects, and the influences of different actuator distributions on the controlled results were investigated.…”

A novel quasi-zero-stiffness isolation platform via tunable positive and negative stiffness compensation mechanism

“…For the semi-active and active control strategies, large control forces and expected vibration control performance may be conveniently achieved. However, it requires large energy inputs e.g., piezoelectric materials [15,16] and electromagnetic components [17], as well as mechatronic equipment with high maintenance costs. Passive vibration control method with excellent stable performance and economic applicability has been widely investigated to overcome the disadvantages of semi-active and active control approaches [18].…”