초록 ▼

Each wing of an aircraft carries a set of five outboard spoilers, one inboard spoiler, one inboard aileron and one outboard aileron, together constituting the lateral control surfaces for the aircraft. Each spoiler is positioned by means of a single thread electrohydraulic servoactuator. Each outboa

Each wing of an aircraft carries a set of five outboard spoilers, one inboard spoiler, one inboard aileron and one outboard aileron, together constituting the lateral control surfaces for the aircraft. Each spoiler is positioned by means of a single thread electrohydraulic servoactuator. Each outboard aileron is positioned by means of a one/one fail-operational electrohydraulic servoactuator. Each inboard aileron is positioned by a two/one fail-operational, electrohydraulic servoactuator. The control system is operated by four independent electrical control signal processing channels and four independent hydraulic pressure supplies. A distribution pattern of the various lateral control surfaces on the aircraft, and an association pattern of the hydraulic pressure supplies and the electric control signal processing channels to the actuators, results in the lateral control system being operable after three electric channel failures, or three hydraulic pressure supply failures, or a combination of three electric channel and three hydraulic pressure supply failures.

대표청구항 ▼

In an aircraft, a fly-by-wire lateral control system, comprising: a symmetrical pair of lateral control surfaces, one on each wing of an aircraft; a plurality of two/one fail-operational, electrohydraulic actuators, each of which is drivingly connected to a separate lateral control surface, each sai

In an aircraft, a fly-by-wire lateral control system, comprising: a symmetrical pair of lateral control surfaces, one on each wing of an aircraft; a plurality of two/one fail-operational, electrohydraulic actuators, each of which is drivingly connected to a separate lateral control surface, each said actuator comprising two hydraulic sections for redundant operation; four separate hydraulic pressure supplies; four separate electric control signal command channels; each actuator including control means for controlling each of its said two hydraulic sections with a separate hydraulic pressure supply, so that each said hydraulic pressure supply is dedicated to a single hydraulic section, said control means also controlling all four of said electric control signal command channels associated with each actuator, with two of said channels serving as active channels for a first of said actuators and as model channels for the second actuator, and with the remaining two channels serving as model channels for the first actuator and active channels for the second actuator; and each said control means comprising: first means, associated with the active signal command channel for each actuator hydraulic section, and responsive to an electrical input signal supplied thereto, for actively controlling the rate of operation of its actuator hydraulic section, and for providing an actual actuator condition output; second means, associated with model channel for each actuator hydraulic section, and responsive to said electrical input signal supplied thereto, for modeling said first means and for providing a modeled actuator condition output, said modeled actuator condition output similar to the actuator condition output generated by said first means when said electrical input signal is applied to said active signal command channel; means, responsive to said actual actuator condition output and said modeled actuator condition output, for determining failure of one of said control signal command channels if said outputs vary by more than a predetermined amount, said determining means further providing an output indicative of which one of said active signal command channels has failed; and means, responsive to said determining means output indicative of an active signal command channel failure, for disconnecting said active signal command channel output from its associated controlling means and for connecting said model channel output to its associated controlling means, said disconnecting means, responsive to said determining means output indicative of model channel failure, for disconnecting said model channel.