The increasing adoption of exotic and hard to cut materials in high-end applications makes electric discharge machining (EDM) process more relevant than ever. In particular, wire EDM variant (WEDM) deserves attention due to its ability to cut the workpiece's surroundings without completely evaporating the unused portion of the rare and expensive exotic materials. However, WEDM is a stochastic process that still lacks complete mathematical models and is driven by a myriad of parameters that will make its control a complex task. In WEDM, whenever the wire is fed too fast, the process will be interrupted not only by short circuits, but the wire electrode is most likely to break, jeopardising process efficiency in many ways. Currently, most of the literature has focused efficiency efforts in proposing a trade-off among parameters without a complete correlation with servo and control strategies. Therefore, this review aims to find and analyse the state-of-the-art approaches for controlling the Wire EDM process. A systematic literature review is conducted to identify and provide an adequate understanding of the best control strategies, fundamental parameters, and role. With no previous studies found, the present review focuses exclusively on servo control. First, it provides a comprehensive literature framework covering four decades, to next glimpse future developments of WEDM control strategies. Potential adoption of the findings can result in a deeper understanding of control variables and a broader and more efficient concept for WEDM servo feed control.

高端应用中越来越多地采用稀有和难切削材料，这使得放电加工（EDM）工艺比以往任何时候都更加重要。特别是电火花线切割机（WEDM），由于其切割工件周围环境的能力而不会完全蒸发稀有和昂贵的稀有材料的未使用部分，因此值得关注。但是，WEDM是一个随机过程，仍然缺少完整的数学模型，并且受众多参数驱动，这将使其控制成为一项复杂的任务。在WEDM中，每当导线送入速度过快时，不仅会因短路而中断过程，而且导线电极极有可能断裂，从而在许多方面危及过程效率。目前，大多数文献都集中精力进行效率工作，以提出参数之间的折衷方案，而又不与伺服和控制策略完全相关。因此，本文旨在寻找和分析用于控制Wire EDM过程的最新方法。进行了系统的文献综述，以识别最佳控制策略，基本参数和作用并对其提供足够的理解。由于没有先前的研究发现，本综述专门针对伺服控制。首先，它提供了涵盖40年的全面文献框架，以进一步了解WEDM控制策略的未来发展。潜在地采用这些发现可以使人们对控制变量有更深入的了解，并为WEDM伺服进给控制提供更广泛，更有效的概念。