The Nonlinear Bond Of Computer Digital Simulation State In The Automatic Control System

In the last 20 years of last century, computers have been successfully applied to engineering design, analysis, the rate in developed countries has exceeded 90%, a ten-fold increase labor productivity, created unprecedented huge material; Its innovative ideas into the commodities market shorten the time to an astonishing degree, new product range is out of 20 years ago. It could not have been imagined.It is commonly used methods that we use computer numerical control system simulation to aim at control systems analysis, design .The use of computer numerical control system simulation can be avoided because of the physical simulation of various components and the economic, space, weight and other problems can achieve flexibility, diversity study.Simulation is true imitation. It doesn't exist physically in the results, but based on similar principles. Because, whether the system is the composition of the electrical, mechanical, hydraulic, as long as the mathematical model is the same, they must be dynamic of the same. Using the known reference in the introduction of a system of nonlinear simulation program, through a practical system with nonlinear simulation, the simulation results obtained with the actual always inconsistent with the right reference in the nonlinear systems analysis of the simulation program, and a practical system EC link analysis, the actual rise of a project control system for linear link state nonlinear saturation binding guess.Due to computer software and hardware technology environment, previous address digital control system simulation procedures, mostly in ALGOL BASIC development environment, running, low-speed simulation. Simulation results to be a need half a day or even longer. Output quality is poor, usually in the "*" reflect the simulation results. Computer hardware and software technology with the continuous development of simulation environment continues to improve. Today's worth mentioning is a MATLAB software. It has a friendly working platform, easy-to-use programming language, a powerful scientific computing and data processing capability, excellent graphics capabilities, a wide range of application modules sets and toolbox, practical programming interfaces and publishing platform, modular design and system-level simulation. Computer simulation provided excellent environment. In this paper, in order to meet old and new simulation environment in QBASIC, MATLAB environment developed a simulation program.First, the paper recalls the classical and modern control theory by the automatic control system ; the basic concept, open-loop; closed-loop compensation and other basic control ; on differential equations; transfer function; dynamic structure; expression and state-space model; a profound understanding of linear part of the basis for the state constraints.Secondly, this paper introduces the basic concepts of computer simulation, simulation similar principle-oriented structure of the continuous linear, nonlinear systems of similar discrete digital simulation methods and the corresponding procedures. The description of the parameters on the link to the form of structured input to the computer, automatically determine the procedures by which the actual link; Taking into account the actual typical session might have before and after nonlinear. Procedures used to be one-dimensional arrays are described by different types of nonlinear numerical reflection. It is to describe nonlinear parameter by using a -dimensional arrays. In order to maintain a zero on the basis of simulation, it gives an order to maintain the accuracy of part of the equation of state typical discrete solutions. Taking into account the actual engineering control system is generally the various aspects of the typical serial, parallel, feedback and connect components. The introduction of the concept of linking Matrix by using two-dimensional array is described in the actual system typical chain link. Programming also considers the impact of the initial state.Continuous-oriented structure of discrete linear system similar digital simulation method is, in fact, the connection matrix calculation of the various aspects of the importation, known in various aspects of the state variable the value of the initial conditions, a link from the beginning. According to discrete aspects of the output equation, calculated at the next session of the state, by the next session of the output, repeat the process until all aspects of the next output print out and output.Finally, we study the automatic control system with nonlinear simulation, the past can achieve linear and nonlinear digital control system computer simulation program, and didn't consider the actual control system work in the saturated state of linear link constraints, resulting in inconsistent with the actual simulation results. This paper presents the state of saturation for nonlinear constrained major steps, procedures flowchart for the linear link state nonlinear saturation binding only in the calculation of the value of state, an increase of a subroutine call nonlinear saturation process. In QBASIC, two environment MATLAB simulation programs are prepared by operational procedures. Automatic control system was bound state whether the simulation results. Two different simulation results show a computer simulation of nonlinear systems in the state of the effectiveness and accuracy of restraint. It makes right actual project control system simulation results more real.