Titlebook: Sourcebook Of Control Systems Engineering; L. C. Westphal Book 1995 Chapman & Hall 1995 Hardware.Sensor.Standard.System.communication.desi

改革运动

Control laws without theory,Many control systems can be and have been set up with almost no reliance upon the mathematical theory of control. Many more have been based upon a notion of how the mathematics might turn out but with no explicit reliance upon that tool. This is true even leaving aside the PLCs devoted simply to turning on and off the various machines involved.

HARP

Continuous-time system representations,The mathematical model of a plant or process usually comprises a set of differential equations to describe its operations. For convenience, these are frequently converted to other representations and this chapter considers the linear time-invariant systems to which these representations apply.

蚀刻术

Sampled-data system representations,This chapter parallels Chapter 10 for discrete-time systems. Because difference equations are undoubtedly less familiar to students than differential equation methods, we also take a brief look at the characteristics of difference equation time responses.

六边形

System performance indicators,Closed-loop systems are expected to give ‘good’ performance. In this chapter we introduce some of the properties used to measure performance.

Sinus-Rhythm

Lyapunov stability testing,The second or direct method of Lyapunov is entirely different from pole analysis in philosophy, nature and detail, although there are a few overlaps for linear time-invariant systems.

MUTE

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HILAR

https://doi.org/10.1007/978-1-4615-1805-1Hardware; Sensor; Standard; System; communication; design; optimal control; system identification

Detain

Control elements, actuators, and displays,spects of these — the transduction of the computer words to signals appropriate for operating valves, moving dials, running motors, etc. In this context, a control element is a device such as a valve, an actuator is a motor or solenoid which opens and closes the valve, and a display is an indicator on the operator’s console.

synovitis

Conversions of continuous time to discrete time models,its commands at discrete times even if the original control law design was based on differential equations. For these reasons, it is necessary to be able to convert continuous time representations to equivalent discrete time representations.

Dissonance

Nyquist stability theory,iable theory, with the particular application due to Nyquist. The idea is subtle for beginners but is basically straightforward. It has been applied to basic stability testing, to certain non-linear systems, to multivariable systems, and to developing the concepts of relative stability.