重载双波冲击试验机负波阻尼系统的建模与控制器设计  

MODELING AND CONTROLLER DESIGN FOR NEGATIVE PULSE DAMPING SYSTEM OF A HEAVY WEIGHT DOUBLE-WAVEFORM SHOCK TESTING MACHINE

作　　者：褚德英[1] 张志谊[1] 王贡献[1] 华宏星[1] 

机构地区：[1]上海交通大学振动,冲击,噪声国家重点实验室,上海200240

出　　处：《振动与冲击》2007年第7期89-92,共4页Journal of Vibration and Shock

摘　　要：为使冲击试验机的模拟试验更贴近于实际水下爆炸环境,满足最新抗冲击标准的要求,提高冲击试验机的测试能力,本文对重载双波冲击试验机中产生负冲击波的四缸液压阻尼系统进行了精确的动力学建模。为控制四个阻尼缸的同步性能,保证阻尼系统产生的负冲击波在标准规定的容差带范围之内,避免液压缸之间产生过大的应力,构建了基于模型的高性能前馈控制器。该模型提供了一种安全、可控的“虚拟测试”技术,能够在进行实际的物理测试之前,对冲击过程进行调谐并预测系统性能。仿真结果证明了提出的控制方法能够满足系统性能要求。In order to satisfy the newly-built antishock standard and simulate actual underwater explosion environments as well as increase the testing capability of a shock testing machine,a dynamic model with high fidelity of a high-energy hydraulically-actuated four-cylinder damping system for a heavy weight double-waveform shock testing machine is presented,whose function is to produce the required negative shock pulse in given time duration.The same model is then used to formulate an advanced feedforward controller for the system to produce the required negative waveform and to address the motion synchronization of the four cylinders.The model provides a safe and easily controllable way to perform a “virtual testing”before starting potentially desturctive tests on specimens and to predict performance of the system.Simulation results presented demonstrate the effectiveness of the controller.

关 键 词：冲击试验机 负冲击波 前馈控制器 虚拟测试 

分 类 号：O381[理学—流体力学]