Computer Aided Design of Machine Structures with respect to Static and Dynamic Characteristics by Synthesis of Dynamic Rigidity Program System

Abstract This paper addresses the problem of balancing rotational plastic parts during the early stages of design. The study develops an interactive methodology that uses a solid modeling CAD system and considers injection molding concerns simultaneously with static and dynamic balance. The Transfer Matrix Method evaluates the dynamic characteristics by predicting the approximate critical speed of the part. Design Compatibility Analysis (DCA) checks for injection molding guidelines. Using these evaluation modules interactively, designers can develop a functional and manufacturable part quickly.

Download Full-text

RUE — Ein integriertes Programmsystem zur rechnerunterstützten Entwicklung und Konstruktion der Hardware von Datenverarbeitungsanlagen/ RUE —An integrated program system for the computer aided design of the hardware of digital systems

it - Information Technology ◽

10.1524/itit.1975.17.16.160 ◽

1975 ◽

Vol 17 (1-6) ◽

Author(s):

A. HOYER ◽

H. SCHWARZER

Keyword(s):

Computer Aided Design ◽

Digital Systems ◽

Program System ◽

Computer Aided ◽

Aided Design ◽

Integrated Program

Download Full-text

Computer-Aided Design Procedure for Laminar Fluidic Systems

Journal of Dynamic Systems Measurement and Control ◽

10.1115/1.3426953 ◽

1975 ◽

Vol 97 (4) ◽

pp. 373-382 ◽

Cited By ~ 1

Author(s):

T. M. Drzewiecki ◽

D. N. Wormley ◽

F. M. Manion

Keyword(s):

Computer Aided Design ◽

Design Procedure ◽

Control System Design ◽

Static And Dynamic Characteristics ◽

Laminar Jet ◽

Wide Range ◽

Computer Aided ◽

Fluid Properties ◽

Rate Sensor ◽

Aided Design

This paper presents a computer aided procedure for the design of laminar proportional fluid amplifiers and gain blocks. The procedure is based upon a fundamental analysis of the flow regimes in an amplifier. With the aid of a computer, amplifier static and dynamic characteristics, required in control system design, may be determined as a function of geometry and fluid properties. The procedure is illustrated and evaluated by comparison of predicted design and experimentally measured performance. The procedure has been applied to individual elements designed by three different organizations, multistage gain blocks, and laminar jet rate sensor preamplifiers. The results of the procedure are shown to be quite accurate over a wide range of amplifier geometries (eleven different amplifiers with aspect ratio from 0.25 to 3 – a range of 12 to 1 – and nozzle sizes from 0.5 to 10 mm) and operating fluids (both air and oil). Experimental measurements were within 10 percent of the design predictions for amplifier gains, operating resistances, and bandwidth for all examples investigated.

Download Full-text

Моделирование переходных процессов в полупроводниковых приборах на основе 4H-SiC (учет неполной ионизации легирующих примесей в модуле ATLAS программного пакета SILVACO TCAD)

Физика и техника полупроводников ◽

10.21883/ftp.2019.03.47295.9014 ◽

2019 ◽

Vol 53 (3) ◽

pp. 407

Author(s):

П.А. Иванов ◽

А.С. Потапов ◽

Т.П. Самсонова

Keyword(s):

Physical Model ◽

Dynamic Characteristics ◽

Computer Aided Design ◽

Room Temperature ◽

Software Module ◽

Capacitive Element ◽

Computer Aided ◽

Simulation Results ◽

Rc Circuit ◽

Aided Design

AbstractTransient process in a resistor–capacitor (RC) circuit with a reverse-biased 4 H -SiC p – n diode as the capacitive element is simulated. Simulation is performed with the ATLAS software module from the SILVACO TCAD system for technology computer-aided design (TCAD). An alternative way, to that in ATLAS, to set the parameters of doping impurities partly ionized in 4 H -SiC at room temperature is suggested. (The INCOMPLETE physical model available in the ATLAS module, which describes the incomplete ionization of doping impurities in semiconductors, is unsuitable for simulating the dynamic characteristics of devices.) The simulation results are discussed in relation to previously obtained experimental results.

Download Full-text