Graphical Design Method Research Articles

A Graphical Method for Design of Cantilevered and Suspended Span Beams

Cantilevered and suspended span beams are widely used in industrial building roof construction, particularly in single story structures, where joist spacing and beam spans are equal. This type of construction can save a considerable amount of structural steel and reduce erection time. According to the National Building Code of Canada, beams should be designed for loading conditions which produce maximum stresses. For continuous beam framing alternate span loading produces maximum moments. To minimize work in determining maximum beam moments and length of cantilevers, the author has prepared charts which, for specific loading conditions, can give coefficients for moment and cantilever length.

Computer aided design of multivariable nonlinear control systems using frequency domain techniques

The application of frequency domain methods to the study of a class of multivariable nonlinear feedback systems is considered within the context of a comprehensive interactive graphics design procedure and a new computational method is outlined for the determination of limit cycle operation which emphasises the effects of off diagonal system elements. It is shown how compensation can be applied using classical graphical design methods to avoid critical regions in the frequency domain. Two examples of use are given.

Graphical alope stability design method. Thesis. Figs, Tabs, Refs. : Rice, DT Univ. Utah, USA, 1972

Graphical alope stability design method. Thesis. Figs, Tabs, Refs. : Rice, DT Univ. Utah, USA, 1972

Graphical method for optimum design of periodic magnetic focusing structures

Many studies have been made concerning the theoretical features of focusing electron beams by means of permanent magnets producing periodic magnetic fields, and methods for practical design in traveling-wave tubes have been given. A new attempt to solve this problem by means of a graphical method by which the dimensions of the device can be optimized in every practical case is proposed.

A new graphical method for feedback control system compensation design

A new graphical method for feedback control system compensation design yields the parameters of simple compensators which will place a closed-loop pole at a designated location in the 5-plane with arbitrary open-loop gain. The gain limits for compensators with single or multiple identical sections are easily determined by this method, which is simple, easy to apply, fast, and accurate. Examples are given to illustrate its utility.

Design of cooler condensers for gas-vapour mixtures

Graphical method for design of cooler condensers by Mizushina and Kotoo [9] is extended to general gas-vapour systems including air-water having high vapour concentrations. Moreover this is applicable regardless of whether the mixtures continues saturated or superheated, and also simpler than other methods developed previously though it may be less rigorous. Two examples of air-water system and one example of air-benzene system are solved by this method. It is shown that there are good agreement between the results of this method and those of more rigorous ones, i.e. Colburn and Hougen [6[ method or Bra [1] modification.

Image Parameter Square-Frequency Filter Design

By homographic or bilinear transformations of the square frequency plane, it is shown that the image propagation behavior of filters of reactive impedances can, on normalization to the bandwidth, be described independently of the relative bandwidth. A graphical filter design method, similar to the Kosowsky approximation method for filters of narrow relative bandwidth, is hence made available as an accurate method for any relative bandwidth. For relating critical frequencies of lattice impedances to the peaks of infinite attenuation, results combine the simplicity of the Kosowsky (approximate) formulas with complete accuracy for all relative bandwidths. Methods of treating reflection loss are given. In terms of the transformed square frequency variable, the image propagation behavior of any filter represents a whole class of filters from which, by homographic transformations, individual members may be formed as band-pass, high-pass, low-pass, or all-pass filters.

Continuous stirred tank reactors: A new graphical method for complex reaction and reflux designs

AbstractThe usual graphical CSTR design methods are not adequate for the case of complex reactions involving competing or consecutive steps; therefore graphical design method based on the representation of batch data on a triangular diagram is given and illustrated by several examples. This method does not require a complete analysis of the kinetics of the reaction. Since material balances are easily represented on concentration spaces, the method is especially useful when the design includes recycling, or feed additions along reactor chain.

Through‐circulation drying of seaweed. IV.—A graphical desiǵan method for continuous multi‐staǵae driers

AbstractA graphical design method is proposed for calculating the drying time, throughput rates and specific evaporation for double‐ and triple‐stage conveyor through‐circulation driers. The method is illustrated with examples based on the unit wet‐bulb depression drying curves for Laminaria cloustoni stipe and frond.

A graphical method for flip-flop design

A method of design is described for flip-flops subject to any set of requirements and examples of the method are given. The method is simple and fast. It takes into consideration those variations which may occur in the values of circuit components and leads to practical values of resistance and voltage.

Flow of Heated Gases

Abstract The purpose of this investigation was to find a convenient method for correlating the variables involved in the transfer of heat from the wall of a passage to a gas moving at high velocity in the passage. A graphical design method has been developed, using the Reynolds analogy between heat transfer and friction, for one-dimensional flow in a passage of variable area, and with variable wall temperature.

Current Stabilizers

The degree of regulation to be expected from several types of current stabilizers is considered. Regulation equations are derived and a graphical-design method is presented. The regulation produced by a single pentode is much better than that of a single triode. Two cascode-connected pentodes give a better regulation but the tube drop is greater and the circuit is more complex. The regulation may be improved by using nonlinear resistors in the control circuit.