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Velocity feedback control system for a rotor of a toy helicopter

A rotor speed, helicopter technology, applied in the control of the speed or torque of the motor, control system, toy planes, etc., can solve the problem of the helicopter being difficult to control, and achieve the effect of high stability and maneuverability

Active Publication Date: 2011-06-29
SPIN MASTER LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the above solution, as understood by those skilled in the art, requires precise alignment of the rotors, because if too much or too little power is supplied to one rotor, the helicopter will be difficult to steer
In toy helicopters, this creates problems in two situations in particular: (1) when the helicopter's batteries lose power, and (2) when there is a sudden increase or decrease in power to the rotor

Method used

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  • Velocity feedback control system for a rotor of a toy helicopter
  • Velocity feedback control system for a rotor of a toy helicopter
  • Velocity feedback control system for a rotor of a toy helicopter

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Embodiment Construction

[0022] see figure 1 . figure 1 A helicopter 60 having a cockpit 61 , landing gear 62 , a first rotor 63 and a second rotor 64 is shown. It also includes a first motor to drive the first rotor 63, a second motor to drive the second rotor 64, and a power supply to power both motors. A microprocessor controls the level of power provided to each motor. When the first and second electric machines receive power, the rotors 63 and 64 rotate at a speed that depends on the level of power received. There is a tail rotor 100 .

[0023] In at least one embodiment, the power to drive the motor is regulated using pulse width modulation (PWM). see now Figure 3a with 3b , which exemplifies how PWM can be used to provide different amounts of power.

[0024] Figure 3a A graph is shown where voltage (V) is plotted against time (t). Power is provided for a period x and then cut off for a period x'. In this example, periods x and x' are essentially equal, so on average power is availab...

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Abstract

There is provided a method and apparatus for controlling a toy helicopter in flight. The toy helicopter is powered by a first rotor and a second rotor. A target speed ratio is determined for the speed of the first rotor and the speed of the second rotor. The speed of the rotors is adjusted incrementally until the target ratio is achieved.

Description

Background technique [0001] The present invention relates to toy helicopters. In particular, the present invention relates to methods and apparatus for improving the controllability and stability of toy helicopters. [0002] Toy helicopters, like real helicopters, get their lift from a rotor (also known as a rotor), which rotates in a horizontal plane above the main body of the helicopter. However, the rotation of the rotor causes a torque to be exerted on the helicopter which makes it very difficult to keep the helicopter in a forward facing position. [0003] Some helicopters solve this problem by having two coaxial rotors, each rotating in the opposite direction to the other. Since each of the two rotors produces torques that cancel each other out, the helicopter remains stable. [0004] Another way to counteract the torque generated by the rotor is to add a tail rotor, which rotates in the vertical plane. The force generated by such a tail rotor is designed to be in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A63H27/133H02P5/00H02P5/46
Inventor 麦鉴波
Owner SPIN MASTER LTD