초록 ▼

A flight control system receiving input flight control signals from a flight control computer to manipulate a flight control surface. The dual actuator has an actuating rod connected to the flight control surface, and a pair of pistons are mounted on the actuating rod in respective first and second

A flight control system receiving input flight control signals from a flight control computer to manipulate a flight control surface. The dual actuator has an actuating rod connected to the flight control surface, and a pair of pistons are mounted on the actuating rod in respective first and second cylinders. The flow of hydraulic fluid into and out of the first and second cylinders is controlled by the first and second electrohydraulic servovalves, respectively. The electrohydraulic servovalves are, in turn, operated by respective signals applied to a pair of actuating coils. The system includes two controllers that receive the flight control signals and apply respective output signals to the four coils of the two electrohydraulic servovalves. In one embodiment, the controllers each have a primary channel and a secondary channel which are connected to respective actuating coils of the first electrohydraulic servovalve. In another embodiment, one controller has a pair of primary channels while the other controller has a pair of secondary channels.

대표청구항 ▼

A hydraulic flight control system comprising: a tandem hydraulic actuator having an actuating rod connected to a pair of pistons mounted in respective first and second cylinders; first and second electrohydraulic servovalves controlling the flow of hydraulic fluid into and out of said first and seco

A hydraulic flight control system comprising: a tandem hydraulic actuator having an actuating rod connected to a pair of pistons mounted in respective first and second cylinders; first and second electrohydraulic servovalves controlling the flow of hydraulic fluid into and out of said first and second hydraulic cylinders, respectively, each of said electrohydraulic servovalves being controlled by a pair of actuating coils; first controller means receiving a first flight control signal, said first controller means having a primary control channel that provides a primary output to one actuating coil of said first electrohydraulic servovalve for normally operating said first electrohydraulic servovalve, and a secondary control channel that provides a secondary output to the other actuating coil of said first electrohydraulic servovalve for operating said first electrohydraulic servovalve in response to a first enable signal; second controller means receiving a second flight control signal, said second controller means having a primary control channel that provides a primary output to one actuating coil of said second electrohydraulic servovalve for normally operating said second electrohydraulic servovalve, and a secondary control channel that provides a secondary output to the other actuating coil of said second electrohydraulic servovalve for operating said second electrohydraulic servovalve in response to a second enabling signal; and monitor and control logic means monitoring the performance of said first and second controller means, first and second electrohydraulic servovalves and actuator, said monitor and control logic means generating said first and second enable signals in the event that the primary channels of the first and second controller means are incapable of generating their respective primary outputs so that each of said electrohydraulic servovalves is operated by only one channel of its respective controller means at a time and, in the event of a malfunction in its respective primary channel or electrohydraulic servovalve connected to said primary channel, said electrohydraulic servovalve is operated by the secondary channel of its controller means.