建立了用于控制开沟深度的精密播种单体仿形机构的数学模型,阐明仿形机构结构参数与开沟深度之间的关系,并用该模型进行了精密播种单体仿形机构的计算机仿真。结果表明,各结构参数均以不同方式影响仿形性能,更重要的是,不同参数组合时仿形性能不同,其中最明显的是播种速度、仿形轮与开沟器之间的距离及开沟器类型三者的不同组合。 The mathematic model of precision sowing unit profile control mechanism for controlling the depth of ditch was established. The relationship between structure parameters and ditching depth was clarified. The computer simulation of precision sowing unit profile mechanism . The results show that all the structural parameters affect the profiling performance in different ways. More importantly, the profiling performance is different when different parameters are combined. Among them, the most obvious ones are sowing speed, distance between profiling wheel and opener and opening Different types of groove device combinations.