Toward a uniform simulation language

SIMULATION ◽  
1966 ◽  
Vol 6 (5) ◽  
pp. v-v
Author(s):  
D.C. Augustin

Real progress has been made by the SCi Committee on Simulation Software in their attempt to specify a "stand ard" language for the digital simulation of continuous systems. Their success, as indicated by the discussion dur ing the Hybrid Software Standardization Seminar at the SNSCi Meeting in Boston, surprised many who thought that the Committee was attempting to satisfy everybody- a proverbially impossible task. The SCi Committee on Simulation Software grew out of a general feeling that some sort of direction was needed in the area of "digital simulation languages". For many people, this feeling was crystallized by Brennan and Line barger's article "A survey of digital simulation ..." (Vol ume 3; Number 6, page 22, December 1964). The riot of invention duplicated effort and apparent neglect of good ideas indicated the need for some guidance and control! Most of the developers of important simulation lan guages joined in the committee work. They met at rather frequent intervals, maintained effective communication through correspondence, and at length reached a con sensus on principles and concepts. The detailed specifica tion of a continuous system simulation language was then delegated to a working subcommittee. They are now preparing a document, the subcommit tee's report, which will be modified and approved by the entire Committee on Simulation Software.

2011 ◽  
Vol 314-316 ◽  
pp. 511-517
Author(s):  
Qun Min Yan ◽  
Juan Juan Zhu

Aircraft dynamic systems digital simulation platform modeling was construct based on engineering needs and provide the basis of experimental data. Combined with dynamic system characteristics and saber software characteristics .In the Saber simulation software, used the schematic-based, based on functional requirements and the modeling method based on experimental data to establish a dynamic system of different parts of the device model, and according to different modeling methods established by the electrical load model and control model of power systems consisting of mixed-signal model. Finally, experimental verification of the whole system model, simulation results compared with the experimental results prove the accuracy of the system model, effective and practical.


1966 ◽  
Vol AES-2 (4) ◽  
pp. 809-819
Author(s):  
W. D. Carson ◽  
F. W. Eubank ◽  
R. E. Poupard ◽  
T. D. Steele

TAPPI Journal ◽  
2009 ◽  
Vol 8 (1) ◽  
pp. 4-11
Author(s):  
MOHAMED CHBEL ◽  
LUC LAPERRIÈRE

Pulp and paper processes frequently present nonlinear behavior, which means that process dynam-ics change with the operating points. These nonlinearities can challenge process control. PID controllers are the most popular controllers because they are simple and robust. However, a fixed set of PID tuning parameters is gen-erally not sufficient to optimize control of the process. Problems related to nonlinearities such as sluggish or oscilla-tory response can arise in different operating regions. Gain scheduling is a potential solution. In processes with mul-tiple control objectives, the control strategy must further evaluate loop interactions to decide on the pairing of manipulated and controlled variables that minimize the effect of such interactions and hence, optimize controller’s performance and stability. Using the CADSIM Plus™ commercial simulation software, we developed a Jacobian sim-ulation module that enables automatic bumps on the manipulated variables to calculate process gains at different operating points. These gains can be used in controller tuning. The module also enables the control system designer to evaluate loop interactions in a multivariable control system by calculating the Relative Gain Array (RGA) matrix, of which the Jacobian is an essential part.


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