Tandem started out two decades ago making fault-tolerant machines that had their own operating system.
As in all power amplifier designs, a wrongly-installed component may easily cause the immediate failure of several others, making fault-finding difficult, and the whole experience generally less than satisfactory.
The high-dimensional dataset generated by the WQMC equipment makes fault identification difficult.
The vibration responses of different linear faults all possess some common features, which make fault diagnosis very difficult.
This composite spectrum is expected to represent the dynamics of the complete machine assembly and can make fault diagnosis process relatively easier and more straightforward.
These technological advances also make fault diagnosis and maintenance interventions much more challenging, since these operations require a deep understanding of the entire system.
However, the strong nonlinear and non-stationary modulation characteristics of the impulses induced by bearing faults, noises and interferences make fault detection of the wheelset bearing difficult and complex.
The designer and risk analyst would have to work closely together and the risk analyst has to make fault tree analyses for many design solutions, increasing the cost of the design.
