DYNAMIC MULTI-LEVEL STAND Russian patent published in 2008 - IPC G09B9/08 F15B9/17 

FIELD: engineering of training machines, possible use in a complex for semi-natural modeling of flight conditions during training and for training crews of airplanes and helicopters.

SUBSTANCE: the device contains a platform with useful load, hydraulic power supply and hydraulic motors, which change position of the platform in space, each motor having electric control input and consisting of following parts, connected serially: hydraulic cylinder rod position sensor, adder, power amplifier, hydraulic amplifier and power hydraulic cylinder. The rods of hydraulic cylinders in pairs by means of upper joints are connected to the platform, bodies of hydraulic cylinders through lower joints are connected to the foundation. Electric control input is connected to second input of the adder, output of hydraulic power supply is connected to second input of the hydraulic amplifier, and input of hydraulic cylinder rod position sensor is connected to the rod of hydraulic cylinder. Additionally, the device contains following parts, connected serially: block of constants, computing device, frequency characteristics block, and in each hydraulic motor between the adder and power amplifier an adjustable correction unit is installed, first input of which is connected to adder output, second input is connected to the output of constants block which corresponds to current hydraulic motor, the third input is connected to corresponding output of frequency characteristics block, and the output of adjustable correction unit is connected to the input of power amplifier. Additional inputs of computing device are connected to output of rod position sensor of hydraulic cylinder of corresponding hydraulic motor.

EFFECT: increased precision and increased quality of reproduction of control influences by dynamic stand due to increased quality of management of each tracking hydraulic motor during any movements of the platform.

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