tailieunhanh - Model-Based Design for Embedded Systems- P68

Model-Based Design for Embedded Systems- P68: This book contains information obtained from authentic and highly regarded sources. Reasonable efforts have been made to publish reliable data and information, but the author and publisher cannot assume responsibility for the validity of all materials or the consequences of their use. | 656 Model-Based Design for Embedded Systems A is the area of the beam l is the length p is the density of the material 6 is the viscosity factor in the system acting over x and y components The analysis of this element is obtained using the PWL technique presented above. Constraining the input output signals to PWL waveforms the time domain response is completed in one step without costly numerical integration. To test our results a comparison against NODAS 28 was performed. Figure shows the frequency response and corresponding resonant frequencies for this constrained beam 183 qm length qm width poly-Si from both our PWL technique and NODAS. The transient response to nN nonideal step rise time of 10 qs rotational torque is also simulated. The rotational deformation to this force is shown in Figure . The comparison between our results and those of NODAS are very close. NODAS uses SABER a circuit analyzer performing numerical integration for every analyzed point which results in costly computation time. Our linear piecewise solver is computational expensive during the eigenvalue search however this procedure is performed only one time at the beginning of the simulation run. Overall this results in a more computationally efficient simulation. However as previously mentioned the accuracy of the analysis depends on the granularity of the piecewise characterization for the signals used in the system which can increase computation time. Typically this beam is only a part of a bigger device made from individual components that are characterized using similar expressions. Resonant frequencies f1 2 NODAS KHz MHz PWL simulator KHz MHz 3 k k 1 meg 10 meg f Hz a Hz b FIGURE Frequency response of a beam a NODAS b Chatoyant. CAD Tools for Multi-Domain Systems on Chips 657 MamaMaMa 0 0 10 1 20 1 30 1 40 1 50 1 60 1 70 1 80 p 90