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Calculation and flight test methods for slope take-off and landing of helicopter

A calculation method and helicopter technology, applied in design optimization/simulation, geometric CAD, special data processing applications, etc., can solve problems such as inability to achieve slope landing angles, safety accidents, loss of control, etc.

Active Publication Date: 2021-07-06
CHINA HELICOPTER RES & DEV INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Extreme slope take-off and landing is often the limit of longitudinal and lateral cycle control, and a large bending moment will appear on the rotor shaft. Before landing, the helicopter lands freely under the action of its own weight. At this time, it is easy to lose control and cause a safety accident.
[0004] The invention provides a helicopter slope take-off and landing calculation method, which is used to preliminarily judge the limit slope of the slope take-off and landing, and to determine the specific period lever manipulation amount for different slope take-off and landing directions and slope take-off and landing angles; and then to verify the calculation The method needs to carry out the corresponding slope take-off and landing test flight. In addition, if the control method in the test flight is unreasonable, it may also cause the slope landing angle specified in the development requirements to be unable to be achieved under the calculated periodical lever control amount. It needs to be formulated for the specific slope take-off and landing process. A set of reasonable flight test procedures for ramp takeoff and landing

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  • Calculation and flight test methods for slope take-off and landing of helicopter
  • Calculation and flight test methods for slope take-off and landing of helicopter
  • Calculation and flight test methods for slope take-off and landing of helicopter

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Embodiment Construction

[0043] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0044] See attached figure 1 According to a first aspect of the present invention, a calculation method for helicopter slope take-off and landing is provided, which is characterized in that it specifically includes the following steps:

[0045] S1: According to the overall design results of the helicopter, determine the slope angle a, the rotor shaft forward tilt angle b, and the rotor flap adjustment coefficient k; where the slope angle a is t...

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Abstract

The invention belongs to the technical field of helicopter flight mechanics, and particularly relates to calculation and flight test methods for slope take-off and landing of a helicopter. According to the calculation method for the slope take-off and landing of the helicopter, the periodic rod manipulated variables required by different slope take-off and landing directions and slope take-off and landing angles are determined, and a design basis is provided for the design of the manipulated range of the periodic rod of the helicopter, so that the helicopter can realize the slope take-off and landing capability specified by development requirements. Meanwhile, a test flight method for slope takeoff and landing is provided, guidance is provided for a pilot to implement slope landing subjects, the periodic rod control amount determined by the calculation method is verified, and takeoff and landing can be effectively carried out under various different slope conditions.

Description

technical field [0001] The invention belongs to the technical field of helicopter flight mechanics, and in particular relates to a calculation and flight test method for helicopter ramp take-off and landing. Background technique [0002] Helicopters can take off and land in most venues, which is a major feature of helicopters. These grounds may have uneven terrain and slopes, etc. Therefore, users often request helicopters to take off and land on slopes. Slope takeoff and landing includes reverse slope takeoff and landing, along slope takeoff and landing, left and right side slope takeoff and landing and other angles. [0003] Helicopter slope take-off and landing is a relatively bad use state, and the control margin, control quality, load, and rotor blade movement of the helicopter cockpit may all approach the limit. Extreme slope take-off and landing is often the limit of longitudinal and lateral cycle control, and a large bending moment will appear on the rotor shaft. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/15G06F30/20
CPCG06F30/20G06F30/15
Inventor 陆永杰万海明殷士辉孙强滕宝梁徐瑞红陈彬
Owner CHINA HELICOPTER RES & DEV INST
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