NEBS GR-63-CORE抗震试验及其控制策略研究

对通信设备抗震试验方法进行了讨论,重点研究了NEBS GR-63-CORE抗震试验方法。针对抗震试验中地震模拟振动台频宽不够及存在非线性因素影响的问题,设计了地震模拟振动台三参量伺服控制算法,有效拓展了试验系统的频宽,提高试验系统的动态响应范围;并提出一种基于频域的驱动信号修正迭代算法,通过在线迭代修正驱动信号,补偿试验系统中非线性因素对系统的影响。NEBS GR-63-CORE抗震试验表明,基于三参量控制算法及驱动信号修正迭代算法的地震模拟振动台控制策略,能够实现高精度的地震波形复现试验。

Aseismic tests of NEBS GR-63-CORE and its control strategy

Through the discussion on the anti-seismic test for telecommunications equipment, researched the anti-seismic test method in GR-63-CORE criteria of NEBS (Network Equipment-Building System). For the problems that the system bandwidth was not enough and nonlinear factors existed in a seismic test, designed a TVC (three-variable control) algorithm for servo control of the seismic simulating shaking table, and also proposed a correcting iteration algorithm in frequency domain for the drive signal correction of the shaking table. The research results show that the TVC algorithm can effectively expand the bandwidth of the test system and extend its dynamic response range; and the correcting iteration algorithm can effectively compensate the influences of the nonlinear factors in the test system by on-line correcting the drive signal iteratively. The seismic tests of NEBS GR-63-CORE show that with the control strategies of the TVC algorithm and the correcting iteration algorithm, the shaking table can achieve seismic waveform replication tests precisely.