中文摘要：

汽车上电气系统环境异常复杂，电子设备的性能好坏关系到汽车驾驶的安全，出厂前必须经过严格的测试。通过研究ISO16750-2标准及各大生产商的要求，为各种汽车电子设备的测试工作设计了一套电气负荷测试系统，设计的系统以STM32为主控制器，集成DDS模块，可以提供过电压、叠加交流电压、电压缓升缓降、启动特性以及反向电压等测试项目。系统具有测试类项目多、精度高、抗干扰能力强和拓展方便等特点。

英文摘要：

The environment of automobile electrical system is extremely complex,and the performance of automobile electronic equipments relates to the driving safety of motorists.Therefore,the electronic equipments must be rigorously tested beforeleaving their factories.By studying ISO16750-2standard and requirements of the major manufacturers,an electrical load test system was designed for a variety of automobile electronic equipments′testing.The designed system integrated with DDS moduleand taken STM32as its main controller can provide several test items such as overvoltage,alternating voltage superimposition,slow descent and boost voltage,starting voltage,and reverse voltage.This system has features of multi-project test,high precision,strong anti-interference capability and convenient expansion.