| 摘要 |
An electro-hydraulic servo actuator with function for adjusting rigidity. The electro-hydraulic servo actuator comprises an electro-hydraulic transducer which transduces an electric signal into a hydraulic signal, an actuator of a cylinder type which is operated by the electro-hydraulic transducer, and a position detector which detects a position of an output member of the actuator to emit a positional electric signal. The hydraulic-element transducer is a bias piston which is disposed within a actuator rod of the cylinder type actuator and which floats in response to a differential pressure within the cylinder, and the piston is connected to the position detector. The electro-hydraulic servo actuator further comprises an adder which compares the positional signal from the position detector with a command signal to emit a deviation signal, the deviation signal from the adder being applied to the electro-hydraulic transducer, and a hydraulic-electric transducer which detects hydraulic pressure in the actuator and which applies a signal corresponding to the hydraulic pressure to a portion between the detector and the adder to transduce into an electric signal.
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