An Euler-Bernoulli beam system under the local internal distributed control and boundary point observation is studied. An infinite-dimensional observer for the open-loop system is designed. The closed-loop system that...An Euler-Bernoulli beam system under the local internal distributed control and boundary point observation is studied. An infinite-dimensional observer for the open-loop system is designed. The closed-loop system that is non- dissipative is obtained by the estimated state feedback. By a detailed spectral analysis, it is shown that there is a set of generalized eigenfunctions, which forms a Riesz basis for the state space. Consequently, both the spectrum-determined growth condition and exponential stability are concluded.展开更多
In the nanoscale beam,two effects become domineering.One is the non-Fourier effect in heat conduction and the other is the coupling effect between temperature and strain rate.In the present study,a generalized solutio...In the nanoscale beam,two effects become domineering.One is the non-Fourier effect in heat conduction and the other is the coupling effect between temperature and strain rate.In the present study,a generalized solution for the generalized thermoelastic vibration of gold nano-beam resonator induced by ramp type heating is developed.The solution takes into account the above two effects.State-space and Laplace transform methods are used to determine the lateral vibration,the temperature,the displacement,the stress and the strain energy of the beam.The effects of the relaxation time and the ramping time parameters have been studied.展开更多
This paper studies the regularity of Euler-Bernoulli equations on a bounded domain of Rn(n≥2)with boundary controls and collocated observations.The authors consider the Dirichlet controls in the case of hinged and cl...This paper studies the regularity of Euler-Bernoulli equations on a bounded domain of Rn(n≥2)with boundary controls and collocated observations.The authors consider the Dirichlet controls in the case of hinged and clamped boundary controls respectively.It is shown that the systems are regular in the sense of G.Weiss.The feedthrough operators are founded to be zero.展开更多
This paper studies the stabilization problem of an Euler-Bernoulli beam with a tip mass,which undergoes unknown but uniform bounded disturbance at tip mass. Here the nonlinear feedback control law is used to cancel th...This paper studies the stabilization problem of an Euler-Bernoulli beam with a tip mass,which undergoes unknown but uniform bounded disturbance at tip mass. Here the nonlinear feedback control law is used to cancel the effects of the external disturbances. For the controlled nonlinear system,the authors prove the well-posedness by the maximal monotone operator theory and the variational principle. Further the authors prove that the controlled nonlinear system is exponential stable by constructing a suitable Lyapunov function. Finally, some numerical simulations are given to support these results.展开更多
In this paper, we will study the most important effects in the nano-scale resonator: the coupling effect of temperature and strain rate, and the non-Fourier effect in heat conduction. A solution for the generalized th...In this paper, we will study the most important effects in the nano-scale resonator: the coupling effect of temperature and strain rate, and the non-Fourier effect in heat conduction. A solution for the generalized thermoelastic vibration of nano-resonator induced by thermal loading has been developed. The Young’s modulus is taken as a linear function of the reference temperature. The effects of the thermal loading and the reference temperature in all the studied fields have been studied and represented in graphs with some comparisons. The Young’s modulus makes significant effects on all the studied fields where the values of the temperature, the vibration of the deflection, stress, displacement, strain, stress-strain energy increase when the Young’s modulus has taken to be variable.展开更多
研究如下带阻尼Euler Bernoulli方程整体解的适定性utt+auxxxx+2but+cu=f(u), t 0,x∈[0,+∞).就一般非线性项f(u),在Sobolev空间C([0,+∞),Hs([0,+∞)))∩C1([0,+∞),Hs-1([0,+∞)))(s>12)中,给出了此方程初值问题解的存在及唯一性...研究如下带阻尼Euler Bernoulli方程整体解的适定性utt+auxxxx+2but+cu=f(u), t 0,x∈[0,+∞).就一般非线性项f(u),在Sobolev空间C([0,+∞),Hs([0,+∞)))∩C1([0,+∞),Hs-1([0,+∞)))(s>12)中,给出了此方程初值问题解的存在及唯一性.当f(u)=u2时,则在空间C([0,+∞),L2([0,+∞)))∩C1([0,+∞),H-1([0,+∞)))中得到了该整体解的适定性.展开更多
基金the National Natural Science Foundation of Chinathe Program for New Century Excellent Talents in University of China.
文摘An Euler-Bernoulli beam system under the local internal distributed control and boundary point observation is studied. An infinite-dimensional observer for the open-loop system is designed. The closed-loop system that is non- dissipative is obtained by the estimated state feedback. By a detailed spectral analysis, it is shown that there is a set of generalized eigenfunctions, which forms a Riesz basis for the state space. Consequently, both the spectrum-determined growth condition and exponential stability are concluded.
文摘In the nanoscale beam,two effects become domineering.One is the non-Fourier effect in heat conduction and the other is the coupling effect between temperature and strain rate.In the present study,a generalized solution for the generalized thermoelastic vibration of gold nano-beam resonator induced by ramp type heating is developed.The solution takes into account the above two effects.State-space and Laplace transform methods are used to determine the lateral vibration,the temperature,the displacement,the stress and the strain energy of the beam.The effects of the relaxation time and the ramping time parameters have been studied.
基金supported by the National Natural Science Foundation of China under Grant No.11171195,and the National Natural Science Foundation of China for the Youth under Grant No.61403239,and the National Natural Science Foundation of Shanxi Province under Grant No.2013011003-2
文摘This paper studies the regularity of Euler-Bernoulli equations on a bounded domain of Rn(n≥2)with boundary controls and collocated observations.The authors consider the Dirichlet controls in the case of hinged and clamped boundary controls respectively.It is shown that the systems are regular in the sense of G.Weiss.The feedthrough operators are founded to be zero.
基金supported by the Natural Science Foundation of China under Grant Nos.61174080,61573252,and 61503275
文摘This paper studies the stabilization problem of an Euler-Bernoulli beam with a tip mass,which undergoes unknown but uniform bounded disturbance at tip mass. Here the nonlinear feedback control law is used to cancel the effects of the external disturbances. For the controlled nonlinear system,the authors prove the well-posedness by the maximal monotone operator theory and the variational principle. Further the authors prove that the controlled nonlinear system is exponential stable by constructing a suitable Lyapunov function. Finally, some numerical simulations are given to support these results.
文摘In this paper, we will study the most important effects in the nano-scale resonator: the coupling effect of temperature and strain rate, and the non-Fourier effect in heat conduction. A solution for the generalized thermoelastic vibration of nano-resonator induced by thermal loading has been developed. The Young’s modulus is taken as a linear function of the reference temperature. The effects of the thermal loading and the reference temperature in all the studied fields have been studied and represented in graphs with some comparisons. The Young’s modulus makes significant effects on all the studied fields where the values of the temperature, the vibration of the deflection, stress, displacement, strain, stress-strain energy increase when the Young’s modulus has taken to be variable.
文摘研究如下带阻尼Euler Bernoulli方程整体解的适定性utt+auxxxx+2but+cu=f(u), t 0,x∈[0,+∞).就一般非线性项f(u),在Sobolev空间C([0,+∞),Hs([0,+∞)))∩C1([0,+∞),Hs-1([0,+∞)))(s>12)中,给出了此方程初值问题解的存在及唯一性.当f(u)=u2时,则在空间C([0,+∞),L2([0,+∞)))∩C1([0,+∞),H-1([0,+∞)))中得到了该整体解的适定性.
