New Control Method for the MIMO Swept-sine Test
(0) Swept-sine test is one of the important laboratory vibration environmental experiments.It is often applied in order to simulate the real vibration situations of aircrafts,vehicles,watercrafts,and electron devices.The article focuses on the the control method for the newly developing Multi-input Multi-output (MIMO) swept-sine test.A new method named Overlapped Windows and Extension (OWAE) is proposed to smooth the discontinuous signal segments of two sinusoid waves with different frequencies.The method can improve the control precision and meet the requirement of swept time.The uncorrelated integration method is used to identify the amplitude and phase of the steady state sine signal which is the response by unit swept sine excitation through varying the phases to form a full-rank excitation matrix.The frequency response functions (FRFs) are calculated by the Linear Time Invariant (LTI) system theory.The formula with the amplitudes and phases as the control objects for MIMO swept-sine test is derived.The control signal is updated by comparing the feedback response and the reference.An example is given to simulate a two-input two-output swept-sine control system.The results show the validity of the raised control method.
Vibration Control Swept-sine test Multi-input Multi-output system
Buyun Zhang Huaihai Chen Xudong He
State Key Laboratory on Mechanics and Control of Mechanical Structures,Nanjing University of Aeronautics & Astronautics,Nanjing,210016,China
国际会议
南京
英文
1-5
2013-08-20（万方平台首次上网日期，不代表论文的发表时间）