| 摘要 |
A bi-stable fluidic amplifier is inserted in a towed body. The nose of the towed body is opened to admit fluid, which is funnelled under the force of the flow stream into the fluidic amplifier. A passive pressure sensor, preset to a desired depth or altitude controls the direction of the fluid leaving the fluidic device through exit conduits connected from the fluidic device, one to the upper and one to lower surface of the towed body. These exit lines terminate at approximately the separation point of the fluid flowing around the body. The pressure regulator reacting to changes in depth directs a control signal to the fluidic amplifier to divert the passage of the fluid to either the upper or lower exit conduits, depending upon the pressure. Fluid from an exit port is entrained back along the side of the body causing the separation point on that side of the body to move back along the body thereby increasing lift on that side of the body. The change in the lifting force on one side of the body without an equal change on the opposite side forces a change in the attitude or angle of attack of the body to the fluid so it will either plane towards the surface or dives, until the body reaches the pressure level preset on the pressure sensor.
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