Watercraft speed control device
First Claim
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1. An apparatus for controlling the velocity magnitude of a watercraft, said apparatus comprising:
- a GPS device capable of obtaining a measurement of the velocity magnitude of said watercraft;
a first comparator capable of determining the velocity magnitude difference between said GPS velocity measurement and a predetermined velocity; and
a first algorithm capable of creating a first engine speed output correction proportional to said velocity magnitude difference, said first engine speed output correction being capable of causing said watercraft to be propelled at substantially said predetermined velocity.
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Abstract
An automatic speed control system that provides desired watercraft velocity over land. The coupled algorithms correct engine speed and torque using GPS and tachometer measurements, and the corrections are augmented and enhanced by velocity/speed and torque/speed relationships that are dynamically and adaptively programmed with real-time data collected during replicated operations of the watercraft in specified conditions.
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Citations
11 Claims
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1. An apparatus for controlling the velocity magnitude of a watercraft, said apparatus comprising:
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a GPS device capable of obtaining a measurement of the velocity magnitude of said watercraft;
a first comparator capable of determining the velocity magnitude difference between said GPS velocity measurement and a predetermined velocity; and
a first algorithm capable of creating a first engine speed output correction proportional to said velocity magnitude difference, said first engine speed output correction being capable of causing said watercraft to be propelled at substantially said predetermined velocity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus for controlling the velocity magnitude of a watercraft, said apparatus comprising:
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a GPS device capable of obtaining a measurement of the velocity magnitude of said watercraft;
a first comparator capable of determining the velocity magnitude difference between said GPS velocity measurement and a predetermined velocity;
a first algorithm capable of creating a first engine speed output correction proportional to said velocity magnitude difference;
a second algorithm capable of creating a second engine speed output corresponding to an input representative of said predetermined velocity, said second engine speed output representing a dynamic historical value of the speed of an engine propelling said watercraft at a velocity approximately equal to said predetermined velocity;
a second comparator capable of summing said first engine speed output correction of said first algorithm and said second engine speed output of said second algorithm;
a tachometer device capable of measuring the speed of said engine propelling said watercraft;
a third comparator capable of determining the engine speed difference between said tachometer speed measurement and said sum of said first engine speed output correction of said first algorithm and said second engine speed output of said second algorithm;
a third algorithm capable of converting said engine speed difference between said tachometer speed measurement and said sum of said first engine speed output correction of said first algorithm and said second engine speed output of said second algorithm into a first engine torque output proportional to said engine speed magnitude difference;
a fourth algorithm capable of creating a second engine torque output corresponding to an input representative of said sum of said first engine speed output correction of said first algorithm and said second engine speed output of said second algorithm, said second engine torque output representing a dynamic historical value of the torque required to produce an engine speed of said engine propelling said watercraft approximately equal to said sum of said first engine speed output correction of said first algorithm and said second engine speed output of said second algorithm; and
a fourth comparator capable of summing said first engine torque output of said third algorithm and said second engine torque output of said fourth algorithm, said sum being capable of causing said watercraft to be propelled at substantially said predetermined velocity.
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Specification