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Hydraulic system of vehicle shift is an important part of the vehicle automatic shift control system. It affects the quality of the shift. In order to research the characteristics of the hydraulic system of vehicle shift, a model was established based on AMESim. The correctness of the simulation model is verified by building a single hydraulic circuit test platform. Simulation and experiment show...
An adaptive inverse controller in the out loop, which are applied as an outer control loop around the inner control loop of the two-axis angle shaking table, are presented to provide increased control accuracy, stability and reproducibility in applications where inner-control-loop methods prove to be inadequate. Two kinds of adaptive algorithms LMS (Least-mean-square) and RLS (recursive-least-square)...
The control system of 3 axis, 6 degree-of-freedom (DOF) hydraulic shaking table with 8 actuators is presented to reproduce the multiple DOF reference waveforms. The servo control is used to expand the acceleration frequency bandwidth and transform signals between the 8 actuators and 6 DOF. The multi input multi output (MIMO) vbiration control is presented to update the drive signals and reproduce...
The random vibration adaptive control method is presented based on the recursive least-squares (RLS) adaptive filter. The power spectral density (PSD) of drive signal is updated based on the off-line identification of frequency response function (FRF) in conventional random vibration control system. And the pseudo-random drive signal generated by the conventional time-frequency transformation has...
The random vibration adaptive control method is presented based on the Kalman adaptive filter to improve the control precision of random vibration test system. The Kalman adaptive filter is used to obtain the on-line inverse model of the device under test (DUT). The time domain signal having a reference power spectral density (PSD) is updated by the inverse model. The reference PSD is replicated by...
The multi-input multi-output (MIMO) long-term waveform replication control is presented to reproduce the longterm reference waveform and further enhance the effectiveness of multi degree-of-freedom (DOF) vibration qualification test. When the duration of the reference waveform is long enough that can not be processed within a single fast Fourier transform (FFT) frame, the conventional MIMO transient...
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