通过使用SiteLoad，我们能够容易的模拟20个系统的并发用户，并精确的统计相关的系统性能。

With SiteLoad, we were easily able to emulate 20 concurrent users of the system and extract metrics regarding system performance.

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通过与模拟交流伺服系统的比较，说明了全数字交流伺服系统可编程能力强、系统稳定性好、系统性能提高等特点。

By comparison with analogue AC servo system, some remarkable features of digital AC servo system, such op programming function, system stability and system performance are described.

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最后，给出系统性能的计算机模拟结果。

Finally the system performance is evaluated by simulation.

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