Closed loop load rigidity changing device

Abstract

The invention discloses a closed loop load rigidity changing device and belongs to the field of aircraft control. The closed loop load rigidity changing device comprises a power mechanism, a linear transmission platform, a load spring piece, a positioning slider, an angle sensor, a torque sensor, a controller which has a rigidity closed loop control function and a middle slider. By the closed loop load rigidity changing device, the rigidity closed loop control of a simulation loading device of a rigidity-variable steering engine is realized and the loading precision of the loading device can be greatly improved so as to improve the precision of the simulation. The torque sensor is arranged on a fixed spring piece, and the moment of inertia of rotating pieces of the loading device is not increased. The closed loop load rigidity changing device can be used for loading the steering engine which is sensitive to the moment of inertia, does not change the performance of the steering engine and makes the application of loading systems wider.

Description

technical field [0001] The invention relates to a closed-loop load stiffness changing device, which is used for an actuator loading device for simulation of control systems such as aircraft, and belongs to the field of aircraft control. technical background [0002] The role of the steering gear servo simulation loading device is to simulate the aerodynamic moment on the rudder surface of the aircraft during flight. Its function is to reproduce the load on the rudder surface of the aircraft in the air under laboratory conditions, so as to detect the control system of the aircraft. Performance indicators, the traditional steering gear servo simulation loading device is actually a force-applying mechanism, which basically consists of electro-hydraulic servo valves, hydraulic cylinders (or hydraulic motors) and controllers, or consists of servo motors, reduction transmission mechanisms and control devices etc. The output of the hydraulic cylinder or the output of the reduction...

AI Technical Summary

Problems solved by technology

Due to the limited response speed of the force-applying mechanism and the changing position of the rudder blade, a large excess force will be produced, which will affect the accuracy of the simulation

[0003] Minimizing the excess force is the main indicator of the design of the traditional steering gear servo simulation loading device. Usually, the way is to improve the response speed of the force applying mechanism and adopt a new control method, but its response speed is limited by the actuator-hydraulic servo system or electric. The limitation of the response speed of the servo system makes it impossible for the traditional servo loading system to eliminate the excess force, especially for the loading simulation of the rotary steering gear system that requires fast response speed

The patent variable stiffness steering gear simulation loading device (200710119937.0) proposed a scheme to change the working length of the spring plate through the servo mechanism to simulate the aerodynamic force on the rudder plate at different heights and speeds of the aircraft, but the shortcoming of this scheme is that the loading accuracy of the device depends on The accuracy of the spring leaf limits the loading accuracy

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