水稻种绳直播机对地表不平度的动态响应  

Dynamic Response of Taped Type Rice Direct Seeding Machine for Field Surface Roughness

作　　者：任文涛[1] 吕小荣[1] 张本华[1] 

机构地区：[1]沈阳农业大学工程学院,沈阳110161

出　　处：《农业机械学报》2009年第8期58-61,共4页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金资助项目(50775150)

摘　　要：为了探索水稻种绳直播机对地表不平度激励的适应性,进行了动态模拟试验。根据样机的结构特点,设计了由角位移传感器、数据采集卡和计算机等构成的地表不平度检测系统。检测了由旋耕形成的原始地表不平度和经过种绳直播机作业后形成的地表不平度,应用Matlab软件对信号进行了时域和频域分析。应用等同法建立了系统的传递函数,分析了系统的动态特性。研究结果表明,由种绳直播机和土壤等构成的土壤-机器系统是一个具有一阶惯性特征的线性系统,系统的响应速度、频带宽度和覆土厚度等性能指标能够满足农业技术要求。In order to investigate the adaptability of the developed taped type rice direct seeding machine for field surface roughness, dynamic simulated experiments were carried out. A field surface roughness measuring system composed of two angular displacement sensors, an A/D converter, a computer etc. was designed according to the structure and working principle of the seeding machine. The two types of field surface roughness, one known as original field surface roughness formed by the working of rotavator and the other known as rolled field surface roughness formed by the roller of the seeding machine, were detected. The signals were analyzed in time-domain and frequency-domain by using Matlab software. Transfer functions were established by the method of identification, and the dynamic characteristics of the system were analyzed. The results showed that the ＂soil-machine＂ system is linear with the first order typical feature. The dynamic characteristics of the systems such as rapidity, bandwidth and soil covering thickness are able to satisfy the requirements of rice seeding technology.

关 键 词：水稻 种绳直播机 地表不平度 覆土厚度 传递函数 

分 类 号：S223.25[农业科学—农业机械化工程]