传统的结构防灾设计中,通常将各种灾害对结构的作用分开考虑,较少考虑多类型灾害的作用。针对悬吊结构摆振运动振动控制问题,调谐质量阻尼器(Tuned Mass Damper,TMD)、主动质量阻尼器(Active Mass Damper,AMD)均无法进行有效的控制,另...传统的结构防灾设计中,通常将各种灾害对结构的作用分开考虑,较少考虑多类型灾害的作用。针对悬吊结构摆振运动振动控制问题,调谐质量阻尼器(Tuned Mass Damper,TMD)、主动质量阻尼器(Active Mass Damper,AMD)均无法进行有效的控制,另一方面调谐转动惯量阻尼器(Tuned Rotary Inertia Damper,TRID)存在对调谐参数等十分敏感、鲁棒性差、无法在多灾害作用下起到有效控制作用的问题,提出了主动转动惯量驱动控制系统(Active Rotary Inertia Driver,ARID)的概念,设计了小型比例模型振动台试验,运用Simulink进行了数值模拟分析。建立了附加ARID系统的悬吊结构平面摆振运动方程,并对运动方程进行了线性化处理,对系统控制算法进行了设计;用单轴振动台进行了正弦激励输入下结构自由衰减振动、正弦激励输入下结构强迫振动、正弦扫频激励、模拟地震动输入、模拟海洋波浪等5种类型荷载作用下,结构小型比例模型试验,利用Simulink进行了模拟多灾害输入下体系运动方程求解,并与试验结果进行了对比分析。结果表明,主动转动惯量驱动控制系统可以较好地实现悬吊结构摆振控制,且在不同类型单一灾害源激励作用下均表现出稳定性好、鲁棒性好的控制性能,从机理上证明了该系统对多类型灾害源激励结构摆振响应控制应用的可行性。展开更多
An improved whole model of beam pumping system was built. In the detail, for surface transmission system(STS), a new mathematical model was established considering the influence of some factors on the STS's torsio...An improved whole model of beam pumping system was built. In the detail, for surface transmission system(STS), a new mathematical model was established considering the influence of some factors on the STS's torsional vibration, such as the time variation characteristic of equivalent stiffness of belt and equivalent rotational inertia of crank. For the sucker rod string(SRS), an improved mathematical model was built considering the influence of some parameters on the SRS's longitudinal vibration, such as the nonlinear friction of plunger, hydraulic loss of pump and clearance leakage. The dynamic response and system efficiency of whole system were analyzed. The results show that there is a jumping phenomenon in the amplitude frequency curve, and the system efficiency is sensitive to motor power, pump diameter, stroke number, ratio of gas and oil, and submergence depth. The simulation results have important significance for improving the efficiency of beam pumping system.展开更多
Induction motor is used in many applications to drive an electromechanical system. Transients of the motor torque and speed are outlined by the inertia of rotating rotor. The paper deals with influence of rotor inerti...Induction motor is used in many applications to drive an electromechanical system. Transients of the motor torque and speed are outlined by the inertia of rotating rotor. The paper deals with influence of rotor inertia to transients of motor speed. The method of speed control measurement and experimental equipment is discussed. Simulation and experimental results are compared.展开更多
We derive the solvability conditions and an expression of the general solution to the system of matrix equations A 1X=C1 , A2Y=C2 , YB2=D2 , Y=Y*, A3Z=C3 , ZB3=D3 , Z=Z*, B4X+(B4X)+C4YC4*+D4ZD4*=A4 . Moreover, we inve...We derive the solvability conditions and an expression of the general solution to the system of matrix equations A 1X=C1 , A2Y=C2 , YB2=D2 , Y=Y*, A3Z=C3 , ZB3=D3 , Z=Z*, B4X+(B4X)+C4YC4*+D4ZD4*=A4 . Moreover, we investigate the maximal and minimal ranks and inertias of Y and Z in the above system of matrix equations. As a special case of the results, we solve the problem proposed in Farid, Moslehian, Wang and Wu's recent paper (Farid F O, Moslehian M S, Wang Q W, et al. On the Hermitian solutions to a system of adjointable operator equations. Linear Algebra Appl, 2012, 437: 1854-1891).展开更多
基金Projects(50974108,51174175) supported by the National Natural Science Foundation of China
文摘An improved whole model of beam pumping system was built. In the detail, for surface transmission system(STS), a new mathematical model was established considering the influence of some factors on the STS's torsional vibration, such as the time variation characteristic of equivalent stiffness of belt and equivalent rotational inertia of crank. For the sucker rod string(SRS), an improved mathematical model was built considering the influence of some parameters on the SRS's longitudinal vibration, such as the nonlinear friction of plunger, hydraulic loss of pump and clearance leakage. The dynamic response and system efficiency of whole system were analyzed. The results show that there is a jumping phenomenon in the amplitude frequency curve, and the system efficiency is sensitive to motor power, pump diameter, stroke number, ratio of gas and oil, and submergence depth. The simulation results have important significance for improving the efficiency of beam pumping system.
文摘Induction motor is used in many applications to drive an electromechanical system. Transients of the motor torque and speed are outlined by the inertia of rotating rotor. The paper deals with influence of rotor inertia to transients of motor speed. The method of speed control measurement and experimental equipment is discussed. Simulation and experimental results are compared.
基金National Natural Science Foundation of China (Grant No. 11171205)Natural Science Foundation of Shanghai (Grant No. 11ZR1412500)+2 种基金the Ph.D. Programs Foundation of Ministry of Education of China (Grant No. 20093108110001)Shanghai Leading Academic Discipline Project (Grant No. J50101)Innovation Foundation of Shanghai University (Grant No. SHUCX120109)
文摘We derive the solvability conditions and an expression of the general solution to the system of matrix equations A 1X=C1 , A2Y=C2 , YB2=D2 , Y=Y*, A3Z=C3 , ZB3=D3 , Z=Z*, B4X+(B4X)+C4YC4*+D4ZD4*=A4 . Moreover, we investigate the maximal and minimal ranks and inertias of Y and Z in the above system of matrix equations. As a special case of the results, we solve the problem proposed in Farid, Moslehian, Wang and Wu's recent paper (Farid F O, Moslehian M S, Wang Q W, et al. On the Hermitian solutions to a system of adjointable operator equations. Linear Algebra Appl, 2012, 437: 1854-1891).
