초록 ▼

A dual servo actuation system is automatically equalized or rigged by electronic control circuits. A static auto rigging bias is applied to one or the other, or both, of a pair of electro hydraulic servo valves that respectively control two hydraulic actuators driving a common member, such as an air

A dual servo actuation system is automatically equalized or rigged by electronic control circuits. A static auto rigging bias is applied to one or the other, or both, of a pair of electro hydraulic servo valves that respectively control two hydraulic actuators driving a common member, such as an aircraft control surface. An auto rigging bias, which substantially eliminates force fight, is automatically generated and stored as a fixed quantity prior to use of the system for control of the common member. With a zero commanded output of the two actuators, a difference of differential pressures at the actuators is obtained and caused to change the number in a counter as long as the difference exceeds a threshold. The counter number, while it is above the threshold, is continuously applied as a bias signal to decrease the force fight, and the number in the counter is stored as a fixed bias signal when the force fight indicated by the difference of differential pressures drops below the threshold. This fixed bias signal is then applied to the servo actuation system during system operation.

대표청구항 ▼

A method for adjustment of a servo system in which at least first and second electrically controlled servo valves control respective ones of first and second actuators that are connected to drive a common driven member, and in which a force fight may result from multiple driving of the driven member

A method for adjustment of a servo system in which at least first and second electrically controlled servo valves control respective ones of first and second actuators that are connected to drive a common driven member, and in which a force fight may result from multiple driving of the driven member, said method comprising: applying a fixed electrical command input to said servo valves to command a nominally equal stroke of said first and second actuators, generating a bias signal indicative of the magnitude of an indicated force fight resulting from application of said fixed electrical command, storing said bias signal, operating the servo valves of said servo system to drive said driven member after said bias signal is stored, and applying said stored bias signal to at least one of said servo valves in a sense to decrease said indicated force fight.