Abstract An electromagnetically interference-proof flight control device having an hydraulic positioning drive for a control surface, the position of which is to be influenced. Provided are at least one signal line for feeding in optical control signals, at least one hydraulic pressure line and a return line, an electrohydraulic valve arrangement which precedes the hydraulic positioning drive and is connected to the hydraulic pressure line, an optical-electronic converter which converts the optical control signals into corresponding electronic signals for the electrohydraulic valve arrangement and a hydraulic-electric energy converter. The hydraulic-electric energy converter serves as an electric energy source for the opto-electronic converter and for addressing the electrohydraulic valve arrangement. To accomplish the hydraulic-electric energy conversion for the internal power supply in a manner as interference-free and wear-free as possible, the hydraulic-electric energy converter comprises a fluidic oscillator and one or more piezoelectric elements acted upon by the former with periodically variable pressure.
A flight control device substantially free from electromagnetic interference having a hydraulic actuator means for controlling the position of a control surface, at least one signal line for supplying optical control signals to the control device, at least one hydraulic pressure and return line coupled to the control device, electric-hydraulic valve means coupled to and for controlling the hydraulic actuator means and being connected to the hydraulic pressure line, an opto-electronic converter means which converts the optical control signals into corresponding electronic signals for the valve means and a hydraulic-electric energy converter means which provides electric power for the opto-electronic converter means and for the valve means, the hydraulic-electric energy converter means comprising fluidic oscillator means coupled to the hydraulic pressure and return line for providing a periodically variable pressure and at least one piezoelectric means coupled to the fluidic oscillator means and responsive to the periodically variable pressure.
Claim 2
Dependent Claim
149 words
A flight control device substantially free from electromagnetic interference having a hydraulic actuator means for controlling the position of a control surface, at least one signal line for supplying optical control signals to the control device, at least one hydraulic pressure and return line coupled to the control device, electric-hydraulic valve means coupled to and for controlling the hydraulic actuator means and being connected to the hydraulic pressure line, an opto-electronic converter means which converts the optical control signals into corresponding electronic signals for the valve means and a hydraulic-electric energy converter means which provides electric power for the opto-electronic converter means and for the valve means, the hydraulic-electric energy converter means comprising fluidic oscillator means coupled to the hydraulic pressure and return line for providing a periodically variable pressure and at least one piezoelectric means coupled to the fluidic oscillator means and responsive to the periodically variable pressure.
Claim 3
Dependent Claim
15 words
The flight control device recited in claim 1, wherein the piezoelectric means comprise piezoceramic means.
Claim 4
Dependent Claim
24 words
The flight control device recited in claim 1, wherein said valve means comprise means responsive to further piezoelectric means for operating said valve means.
Claim 5
Dependent Claim
25 words
A hydraulic-electric energy converter comprising fluidic oscillator means and piezoelectric means, said piezoelectric means being supplied with periodically variable pressure from said fluidic oscillator means.
Claim 6
Dependent Claim
25 words
A hydraulic-electric energy converter comprising fluidic oscillator means and piezoelectric means, said piezoelectric means being supplied with periodically variable pressure from said fluidic oscillator means.
Claim 7
Dependent Claim
15 words
The hydraulic-electric energy converter recited in claim 4 wherein the piezoelectric means comprises piezoceramic means.