激光跟踪仪测量距离误差的机器人运动学参数补偿  

Robot kinematic parameters compensation by measuring distance error using laser tracker system

作　　者：杜亮[1,2] 张铁[1] 戴孝亮[1] 

机构地区：[1]华南理工大学机械与汽车工程学院,广东广州510641 [2]广东产品质量监督检验研究院,广东广州510330

出　　处：《红外与激光工程》2015年第8期2351-2357,共7页Infrared and Laser Engineering

基　　金：广东省战略新兴产业项目(2011A091101001;2012B010900076);广东省教育部产学研结合项目(2012B090600028);广东省质量技术监督局科技项目(2012CZ01);中山市产学研项目(201207B001)

摘　　要：机器人位置精度检测为距离误差检测,检测末端位置指令距离和实际距离之间的误差。为达到提高机器人精度的目的,需对机器人运动学参数进行补偿。文中采用激光跟踪仪检测机器人距离误差,通过研究得出的机器人距离误差模型和实际的运动学参数的映射。Hayati提出的修正的机器人D-H运动学模型中某些参数是不可以辨识的,引入辨识距离误差矩阵的条件数,通过计算条件数,剔除了机器人距离误差运动学参数模型中不可辨识的参数。最后对机器人可辨识的运动学参数误差进行补偿,从而提高了机器人的精度。The robot position accuracy is measuring the robot pose error between the command distance and the actual distance. To improve the robot accuracy, it needs to compensate on robot kinematic parameters. Laser tracker was used to measure the robot distance error in this article. The mapping between the actual kinematic parameters and the robot distance error model was obtained. Some kinematic parameters in modified D-H kinematic model that Hayati proposed can not be identified, therefore, the condition number was introduced to identify the distance error matrix. Through computing the condition number, the unidentified kinematic parameters in distance error kinematic model was deleted. Ultimately, the robot kinematic model using the identified kinematic parameters was compensated. It improves the robot accuracy apparently.

关 键 词：机器人 距离误差 误差补偿 条件数 

分 类 号：TP242.2[自动化与计算机技术—检测技术与自动化装置]