Application of HALT Test Method in Development of Digital Instrument and Control Equipment

In order to solve the following questions that digital instrument and control equipment cannot avoid its potential failure mode in the design stage, traditional development and test methods cannot simulate the environment profiles and task profiles of the equipment in the whole life cycle, some failure modes of the equipment cannot be exposed in the development stage, this paper proposes to carry out a HALT test on a certain type of digital instrument and control equipment after adaptive simplification. Based on the statistical results of a large number of similar tests abroad and the requirements of equipment environmental adaptability, the criterion of stress level range to measure the necessity of fault improvement is formulated; At the same time, combined with the experience feedback of similar instrument and control equipment, the test scheme is adjusted; Finally, combined with the existing BIT testing methods of the target equipment, a real-time condition monitoring and fault analysis tool is developed to complete the real-time monitoring and auxiliary failure analysis in the test process. The experimental results show that the customized test method can effectively expose and reproduce the potential faults of this typical digital instrument and control equipment, and the method can be applied to other similar instrument and control equipment with strong operability.