Simulation Method of Helicopter Surface Effect

A technology of ship surface effect and simulation method, applied in the field of flight simulation, to achieve the effect of obvious rolling motion and pitching motion, accurate and realistic effect

Inactive Publication Date: 2016-09-07
MILITARY SIMULATION TECH RES INST AVIATION UNIV OF AIR FORCE OF PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. Partial ground effect

Method used

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  • Simulation Method of Helicopter Surface Effect
  • Simulation Method of Helicopter Surface Effect
  • Simulation Method of Helicopter Surface Effect

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] according to Figure 1~5 As mentioned above, start the ship surface wake program on the main solving computer (1). The steady-state wind velocity component value of the wake field is first obtained by CFD calculation, and the corresponding database is established for program calling. When the surface wake program is started, the corresponding database is called according to the relative motion between the ship and the air. Calculate the position of the micro-element section of the helicopter rotor blade in the ship coordinate system, and determine the three component values ​​(directions of the three coordinate axes) of the steady-state wind speed of the wake field according to the position of the micro-element section. Then the white signal is generated by the random number, after the rationalization of the spectrum function of the random component of the ship wake in three directions, and then processed by the filter, the three component values ​​of the random wind s...

Embodiment 2

[0036] 1. Determination of the position of the micro-element section of the rotor blade

[0037] The torsional and steering wires that set the rotor blades are rigid and have no elastic deformation. Create the following coordinate system.

[0038] 1) Ground coordinate system : The origin is at the center of mass of the ship, Axis lying in the ground plane pointing to true north is positive, Axis lying in the ground plane pointing due east is positive, The axis perpendicular to the ground plane points upward to be positive;

[0039] 2) Ship coordinate system : The origin is at the center of mass of the ship, The axis is located in the symmetry plane of the ship and points to the bow direction, which is positive. The axis lies in the plane of symmetry of the ship and is perpendicular to Axis pointing up is positive, The axis perpendicular to the plane of symmetry of the ship points to the right as positive. The ship coordinate system has roll, pitch and yaw rela...

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Abstract

The invention discloses a method for simulating the influence of the helicopter deck effect. The helicopter vane element theory is used to give the aerodynamic model of the rotor blade, and the comprehensive influence of the ship motion and the ship deck effect is considered to establish the helicopter deck effect. computational analysis model. The calculation results show that the ship surface effect model established by the simulation algorithm is closer to the characteristics of the actual ship surface effect in terms of the simulation results of the aerodynamic force and aerodynamic moment when the helicopter lands on the ship. The helicopter surface effect calculation model is applied to the Navy's Zhi-8J and Zhi-9C flight simulators, and has been approved by the pilots, who believe that the degree of simulation is realistic. And it has passed the expert review appraisal and product finalization appraisal organized by the Navy.

Description

technical field [0001] The invention belongs to the field of flight simulation. The invention discloses a method for simulating the influence of the helicopter surface effect, which is used for improving the simulation accuracy of the flight performance and flight quality of the flight simulator, and relates to the flight system and the motion system of the flight simulator. Background technique [0002] The problem of helicopter surface effect is similar to the principle of ground effect, but due to the special flight environment of shipboard flight, its mechanism of action and its impact on flight are different from ground effect. Mainly manifested in the following two points: [0003] 1. Partial ground effect [0004] Unlike landing and taking off on land, due to the small area of ​​the flight deck on a non-aircraft carrier carrier, when a helicopter takes off and lands, some rotors are often on the deck and some rotors fly out of the deck. Since the carrier deck is fa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B17/02
Inventor 李国辉李松维胥文李友毅
Owner MILITARY SIMULATION TECH RES INST AVIATION UNIV OF AIR FORCE OF PLA
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