外文翻译基于单片机低成本教学数字温度控制器.docx

外文翻译原文Teaching digital control using a low-cost microcontroller-based temperature control kitAbstract The design of a low-cost digital temperature control kit is described. The system enables the students to implement various control strategies using a microcontroller. The kit is intended to be helpful in a control laboratory as a complement to the digital control system theory taught to undergraduate students. Keywords microcontroller-based control; teaching digital control; temperature controlWith the availability of low-cost computers and microcontrollers, digital control has gained popularity and most current control systems are based on digital techniques. The same is true for simulation. Digital simulation techniques have replaced analogue simulators. These simulators are in the form of interactive computer packages used in the industry, in research laboratories, colleges and universities. Early simulation packages such as ACSL were designed for large mainframe computers and only large organizations could afford to purchase and use such packages. Currently, software packages such as TUTSIM, 20-sim, program CC, VisSim, Extend, and MATLAB are available for desktop PCs and they are within the budgets of most universities and colleges. Some packages (e.g. MATLAB and program CC) are also offered in the form of a low-cost student edition and students can purchase and use these packages on their own PCs, away from the university laboratories.Simulation is an invaluable tool in teaching the theory of control system. For example, the student can plot the accurate root-locus of a complex System in a matter of a few minutes rather than spending several hours. Similarly, the time and frequency responds of a system can very easily be plotted with the aid of simulator package. Although the simulators are very useful tools they are not same as real world solutions. There are also cases in which computer models may be inappropriate, or the system is too complex to describ