*Review* **Review and Development Trend of Digital Hydraulic Technology**

**Qiwei Zhang 1, Xiangdong Kong 1,2,\*, Bin Yu 1, Kaixian Ba 1, Zhengguo Jin 1 and Yan Kang 1**


Received: 8 December 2019; Accepted: 9 January 2020; Published: 13 January 2020

**Abstract:** Since the emergence of digital hydraulic technology, it has achieved good results in intelligence, integration, energy saving, etc. After decades of development, and it has also attracted wide attention in the industry. However, for many years, the definition of digital hydraulic technology has di ffered between researchers, and there is no uniform definition. Such a situation a ffects the development of it to a certain extent. Therefore, this paper gives the exact definition of digital hydraulic technology based on a large number of researches on it. At the same time, the paper analyzes the research status and developmental process of the such a technology, and we forecast the development trend of it.

**Keywords:** digital hydraulic technology; digital hydraulic components; digital hydraulic system
