摘要
介绍了以电极放电时间为调整参数的电火花加工自适应控制原理。其控制策略是对加工系统的模型参数进行估计,并根据放电状态实时更替控制器的控制变量值,控制放电状态跟踪指定的参考值。实验证明,自适应控制的电火花加工比没有自适应控制的电火花加工的加工过程更稳定,稳态拉弧脉冲与短路脉冲出现的几率也大幅度减少,且加工速度也提高了近一倍。
A new electro-discharge machining EDM adaptive control system which directly regulates the electrode down time has been developed. The control strategy is based upon a real time estimation of the parameters of EDM model to minimize the variance of controlled process. It was found that with a proper choice of the reference gap state value this adaptive system can not only obtain a high stable machining but also achieve a high machining efficiency, which was almost double the machining efficiency in normal machining without adaptive control. In this sense, conclusion can be safely derived that this adaptive control strategy has greatly increased EDM performances.
出处
《电加工与模具》
2008年第6期16-20,共5页
Electromachining & Mould
