近来,试验机的结构已发生质变,出现两种情况:1.从试验人员方面来说,对试验机的要求有很大的提高和增加,被制定了新的试验方法和新的机械性能特性已获得承认。2.迅速发展的工业电子学,包括计算技术,自动控制理论与实践的成就,可以创制原理上完全是新型的试验机操纵系统。可以说,可以制成按试样所需的变形或加荷规律的试验机。 Recently, there has been a qualitative change in the structure of a testing machine, and two situations have arisen: 1. From the perspective of the experimenter, the requirements for the testing machine have been greatly improved and increased. New test methods and new mechanical properties have been developed Has been recognized. 2. The rapid development of industrial electronics, including computing technology, automatic control theory and practice achievements, can be created in principle completely new test machine control system. It can be said that the deformation of the sample can be made according to the law of loading or loading test machine.