The disclosed system comprises: a DEH controller, a displacement sensor, a servo module, an electro-hydraulic converter, an oil-driven machine, a regulation valve, a power supply unit, and a manual operation device, as well as one or more standby servo modules switched into work state when the servo module failed. This invention realizes full-redundancy control for servo loop, reinforces fault tolerant and correction mechanism to on-site acquired signal, and avoids the control error led by wrong signal acquisition. |