CAJ | 학술논문

在航天产品的地面振动试验中，传统加速度控制方法会造成过试验，尤其在试验件低阶共振频率处。力限控制技术以加速度和力双重控制，实现振动台输入加速度的实时下凹，能很好地解决过实验的问题。力限控制技术在国外已相对成熟，但在国内应用于实际产品的例子较少。在现有解决过试验的途径中，力限被认为是当前解决过试验问题的最好办法，准确获取力限条件是力限控制技术的关键，现常用复杂二自由度法及半经验法。力限试验夹具不同于传统加速度控制振动试验夹具，一般来说，夹具的一阶频率应大于试验件一阶频率的3～5倍或者大于试验最高频率。力限控制技术的应用、发展还存在一些问题待更深入的研究。
재항천산품적지면진동시험중，전통가속도공제방법회조성과시험，우기재시험건저계공진빈솔처。력한공제기술이가속도화력쌍중공제，실현진동태수입가속도적실시하요，능흔호지해결과실험적문제。력한공제기술재국외이상대성숙，단재국내응용우실제산품적례자교소。재현유해결과시험적도경중，력한피인위시당전해결과시험문제적최호판법，준학획취력한조건시력한공제기술적관건，현상용복잡이자유도법급반경험법。력한시험협구불동우전통가속도공제진동시험협구，일반래설，협구적일계빈솔응대우시험건일계빈솔적3～5배혹자대우시험최고빈솔。력한공제기술적응용、발전환존재일사문제대경심입적연구。
Among the ground vibration tests of space products , traditional acceleration control meth-od generally result in overtesting especially in the low order resonance frequency of the test item . The force limiting uses a method of dual control of the acceleration and force input from the shaker , which can alleviates the overtesting problem by reduce the input acceleration real time .The force limiting technique has been relatively mature in foreign countries , but there has little application on actual products in China .In the existing ways to solve overtesting , force limiting is considered the best way to solve the problem .Getting exact force spectrum is the key of force limiting , complex two degree of freedom or semi-empirical is the most commonly used method .Force limit test fixture is different from the traditional acceleration control vibration test fixture , commonly , the fundamental resonance frequency of the fixture should be great then 3~5 times of the fundamental resonance fre-quency of the test item , or greater than the highest frequency of the test conditions .There are still some problems should to be studied to extend and develop force limiting .