以常用重叠交替更新过程为对象模型,讨论了离散时间仿真(Discrete time system specification,DTSS)校验的两个理论问题.首先,给出了基于仿真关键系统变量方差的输入/输出级仿真精度的定量度量.其次,针对精度度量难以求解的问题,在Zeig...以常用重叠交替更新过程为对象模型,讨论了离散时间仿真(Discrete time system specification,DTSS)校验的两个理论问题.首先,给出了基于仿真关键系统变量方差的输入/输出级仿真精度的定量度量.其次,针对精度度量难以求解的问题,在Zeigler的仿真理论框架下给出了离散时间仿真和离散事件仿真(Discrete event system specification,DEVS)的等价性证明,并根据这个结果给出了仿真误差度量的一种近似表达式.展开更多
A new single degree-of-freedom （1 DOF） resonance device was developed. It mainly comprises a linear motor, a vibrating screen, a supporting spring set, a supporting frame and a damper set. Forces acting on the vibra...A new single degree-of-freedom （1 DOF） resonance device was developed. It mainly comprises a linear motor, a vibrating screen, a supporting spring set, a supporting frame and a damper set. Forces acting on the vibrating screen were found. A differential equation for describing the forces was set up. Equations that were used to evaluate the exciting force and exciting frequency in resonance were derived from the solution to the differential equation. In addition, an equation for evaluating the deformed magnitude of the damping springs in the damper set was presented so that the suitable damping may be obtained. Finally, a Matlab/Simulink model of the new i DOF resonance device was also built. Displacement-time curves of the vibrating screen under four conditions were obtained in the use of the Matlab/Simulink simulation. The curves indicate that it can shorten the time for the vibrating screen to be into the stable resonance with increasing the damping, and it can lengthen the time with increasing the vibrated mass or amplitude, but every given angular frequency cannot acquire the desired amplitude value of resonance.展开更多
文摘以常用重叠交替更新过程为对象模型,讨论了离散时间仿真(Discrete time system specification,DTSS)校验的两个理论问题.首先,给出了基于仿真关键系统变量方差的输入/输出级仿真精度的定量度量.其次,针对精度度量难以求解的问题,在Zeigler的仿真理论框架下给出了离散时间仿真和离散事件仿真(Discrete event system specification,DEVS)的等价性证明,并根据这个结果给出了仿真误差度量的一种近似表达式.
文摘A new single degree-of-freedom （1 DOF） resonance device was developed. It mainly comprises a linear motor, a vibrating screen, a supporting spring set, a supporting frame and a damper set. Forces acting on the vibrating screen were found. A differential equation for describing the forces was set up. Equations that were used to evaluate the exciting force and exciting frequency in resonance were derived from the solution to the differential equation. In addition, an equation for evaluating the deformed magnitude of the damping springs in the damper set was presented so that the suitable damping may be obtained. Finally, a Matlab/Simulink model of the new i DOF resonance device was also built. Displacement-time curves of the vibrating screen under four conditions were obtained in the use of the Matlab/Simulink simulation. The curves indicate that it can shorten the time for the vibrating screen to be into the stable resonance with increasing the damping, and it can lengthen the time with increasing the vibrated mass or amplitude, but every given angular frequency cannot acquire the desired amplitude value of resonance.
