Selective deceleration brake control system
First Claim
1. A brake control system for applying and controlling the brake application means for a wheel of a vehicle independently of operator brake application, comprising:
- signal generating means for producing a wheel speed signal that is a function of the rotational speed of said wheel;
anti-skid control means for receiving and processing said wheel speed signal to provide an anti-skid brake control signal;
reference generating means for generating a reference velocity signal having a selectively variable rate of decrease;
rate selector means for manually selecting a rate of decrease of said reference velocity signal indicative of a desired rate of vehicle deceleration;
comparison means for comparing said wheel speed signal with said reference velocity signal for generating an error signal indicative of the difference between said wheel speed signal and said reference velocity signal;
control means for providing a signal to said brake application means to apply brake pressure to said wheel independently of operator brake application and responsive to said error signal to provide a selected deceleration control signal for controlling said brake pressure in order to maintain said desired rate of deceleration; and
means for preventing said brake application means from applying said brake pressure in response to said deceleration brake control signal and for applying brake pressure in response to said anti-skid brake control signal when said anti-skid brake control signal commands a lower brake pressure than does said deceleration brake control signal.
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Accused Products
Abstract
A selective deceleration brake control system which enables the operator of an aircraft or other vehicle to preselect a rate of deceleration for the vehicle. The system produces a velocity reference signal which decreases in value at a rate indicative of the rate of vehicle deceleration selected by the operator. A signal indicative of actual wheel velocity is continuously produced and compared with the velocity reference signal to generate an error signal. The error signal is processed and used to produce a brake control signal. The system continuously controls braking effort to cause the vehicle to decelerate at the rate selected by the operator. The selective deceleration circuit cooperates with an anti-skid brake control circuit such that at any instant the circuit providing the higher brake release command will control.
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Citations
48 Claims
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1. A brake control system for applying and controlling the brake application means for a wheel of a vehicle independently of operator brake application, comprising:
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signal generating means for producing a wheel speed signal that is a function of the rotational speed of said wheel; anti-skid control means for receiving and processing said wheel speed signal to provide an anti-skid brake control signal; reference generating means for generating a reference velocity signal having a selectively variable rate of decrease; rate selector means for manually selecting a rate of decrease of said reference velocity signal indicative of a desired rate of vehicle deceleration; comparison means for comparing said wheel speed signal with said reference velocity signal for generating an error signal indicative of the difference between said wheel speed signal and said reference velocity signal; control means for providing a signal to said brake application means to apply brake pressure to said wheel independently of operator brake application and responsive to said error signal to provide a selected deceleration control signal for controlling said brake pressure in order to maintain said desired rate of deceleration; and means for preventing said brake application means from applying said brake pressure in response to said deceleration brake control signal and for applying brake pressure in response to said anti-skid brake control signal when said anti-skid brake control signal commands a lower brake pressure than does said deceleration brake control signal. - View Dependent Claims (2, 3, 4, 5)
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6. A brake control system for applying and controlling the brake application means associated with each wheel of a pair of braked load-bearing wheels of an aircraft independently of operator brake application, comprising:
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signal generating means for each of said wheels for producing a wheel speed signal that is a function of the rotational speed of its associated wheel; anti-skid control means for each of said wheels for receiving and processing said wheel speed signal to provide an anti-skid brake control signal of its associated wheel; reference generating means for generating a reference velocity signal having a selectively variable rate of decrease; rate selector means for manually selecting a rate of decrease of said reference velocity signal indicative of a desired rate of vehicle deceleration; averaging means responsive to the wheel speed signal associated with each of said wheels to form an average wheel speed signal therefrom; comparison means for comparing said average wheel speed signal with said reference velocity signal for generating an error signal indicative of the difference between said average wheel speed signal and said reference velocity signal; control means for providing a signal to said brake application means to apply brake pressure to each of said wheels independently of operator brake application and responsive to said error signal to provide a selected deceleration control signal for controlling said brake pressure in order to maintain said desired rate of deceleration; and means for preventing said brake application means from applying said brake pressure in response to said brake control signal and for applying brake pressure in response to said anti-skid brake control signal when said anti-skid brake control signal commands a lower brake pressure than does said deceleration brake control signal. - View Dependent Claims (7, 8, 9, 10, 11, 12, 18)
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13. A brake control system, for an aircraft having plural groups of braked load-bearing wheels, for applying and controlling a brake application means for said wheels independently of operator brake application, said system comprising:
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anti-skid control means for providing an anti-skid brake control signal; signal generating means associated with each of said wheels for producing a first signal that is related to the rotational speed of its associated wheel; reference generating means for generating a reference signal; rate selector means for manually selecting said reference signal indicative of a desired rate of vehicle deceleration; averaging means in each of said wheel groups responsive to the first signal associated with each of said wheels in said group to form an average signal therefrom; comparison means for each of said wheel groups for comparing said average signals for the associated wheel group with said reference signal for generating an error signal indicative of the difference between said average signal for the associated wheel group and said reference signal; control means associated with each group of wheels for providing a signal to said brake application means to apply brake pressure to said wheels independently of operator brake application and responsive to said error signal to provide a deceleration control signal for controlling said brake pressure in order to maintain said desired rate of deceleration; and means for preventing said brake application means from applying said brake pressure in response to said deceleration brake control signal for said group of wheels and for applying brake pressure in response to said anti-skid brake control signal when said anti-skid brake control signal commands a lower brake pressure than does said deceleration brake control signal. - View Dependent Claims (14, 15)
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16. A deceleration control system for applying and controlling the brake application means associated with each wheel of group of braked load-bearing wheels of an aircraft independently of operator brake application, comprising:
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signal generating means for each of said wheels for producing a first signal that is related to the rotational speed of its associated wheel; reference generating means for generating a reference signal; rate selector means for manually selecting said reference signal indicative of a desired rate of vehicle deceleration; averaging means responsive to the first signal associated with each of said wheels to form an average signal therefrom; comparison means for comparing said average signal with said reference signal for generating an error signal indicative of the difference between said average signal and said reference signal; and control means for providing a signal to said brake application means to apply brake pressure to said wheels independently of operator brake application and responsive to said error signal to provide a selected deceleration control signal for controlling said brake pressure in order to maintain said desired rate of deceleration. - View Dependent Claims (17, 19, 20, 21, 22, 23)
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24. A deceleration control system for an aircraft having plural groups of brake load-bearing wheels, for applying and controlling a brake application means for said wheels independently of operator brake application, said system comprising:
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signal generating means associated with each of said wheels for producing a first signal that is related to the rotational speed of its associated wheel; reference generating means for generating a reference signal; rate selector means for manually selecting said reference signal indicative of a desired rate of vehicle deceleration; averaging means for each of said wheel groups responsive to the first signal associated with each of said wheels in said group to form an average signal therefrom; comparison means for each of said wheel groups for comparing said average signal for the associated wheel group with said reference signal for generating an error signal indicative of the difference between said average signal for the associated wheel group and said reference signal; and control means associated with each group of wheels for providing a signal to said brake application means to apply brake pressure to said wheels independently of operator brake application and responsive to said error signal to provide a deceleration control signal for controlling said brake pressure in order to maintain said desired rate of deceleration. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31)
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32. A brake control system for controlling the brake application means for a wheel of a vehicle comprising:
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analog signal generating means for producing a wheel speed signal that is a function of the rotational speed of said wheel; anti-skid control means for receiving and processing said wheel speed signal to provide an anti-skid brake control signal; reference generating means for generating a reference velocity signal having a selectively variable rate of decrease; rate selector means for manually selecting a rate of decrease of said reference velocity signal indicative of a desired rate of wheel deceleration; comparison means for comparing said wheel speed signal with said reference velocity signal for generating an error signal indicative of the difference between said wheel speed signal and said reference velocity signal; deceleration control signal generating means responsive to said error signal to provide deceleration brake control signal; gate means for receiving and comparing said anti-skid brake control signal and said deceleration brake control signal to transmit for control of said brake application means the control signal which commands the lower brake pressure; and means for deactuating said deceleration control signal generating means and for causing said deceleration control signal generating means to provide incident to said deactuation a deceleration control signal of gradually decreasing value to permit a gradual decrease in brake pressure.
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33. A brake control system for controlling the brake application means associated with each wheel of a pair of braked load-bearing wheels of an aircraft comprising:
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analog signal generating means for each of said wheels for producing a wheel speed signal that is a function of the rotational speed of its associated wheel; anti-skid control means for each of said wheels for receiving and processing said wheel speed signal to provide an anti-skid brake control signal for control of its associated wheel; reference generating means for generating a reference velocity signal having a selectively variable rate of decrease; rate selector means for manually selecting a rate of decrease of said reference velocity signal indicative of a desired rate of wheel deceleration; averaging means responsive to the wheel speed signal associated with each of said wheels to form an average wheel speed signal therefrom; comparison means for comparing said average wheel speed signal with said reference velocity signal for generating an error signal indicative of the difference between said average wheel speed signal and said reference velocity signal; deceleration control signal generating means responsive to said error signal to provide a deceleration brake control signal; gate means for each of said wheels for receiving and comparing said anti-skid brake control signal for its associated wheel and said deceleration brake control signal to transmit for control of the brake application means for its associated wheel the control signal which commands the lower brake pressure; and means for deactuating said deceleration control signal generating means and for causing said deceleration control signal generating means to provide incident to said deactuation a deceleration control signal of gradually decreasing value to permit a gradual decrease in brake pressure.
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34. A brake control system for an aircraft having plural groups of braked load-bearing wheels, said system comprising:
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analog signal generating means associated with each of said wheels for producing a wheel speed signal that is a function of the rotational speed of its associated wheel; anti-skid control means for each of said wheels receiving and processing said wheel speed signal to provide an anti-skid brake control signal for control of its associated wheel; reference generating means for generating a reference velocity signal having a selectively variable rate of decrease; rate selector means for manually selecting a rate of decrease of said reference velocity signal indicative of a desired rate of deceleration; averaging means for each of said wheel groups for each of the wheels in its associated wheel group to form an average wheel speed signal therefrom; comparison means for each of said wheel groups for comparing said wheel speed signal for the associated wheel group with said reference velocity signal for generating an error signal indicative of the difference between said average wheel speed signal for the associated wheel group and said reference velocity signal; deceleration control signal generating means for each of said wheel groups responsive to said error signal for the associated wheel group to provide a deceleration brake control signal for the associated wheel group; gate means for each of said wheels for receiving and comparing said anti-skid brake control signal for said wheel and said deceleration brake control signal for the associated wheel group to transmit for control of brake application means associated with said wheel the control signal which commands the lower brake pressure; and a pressure balance means associated with each of said deceleration control signal generating means for comparing an output thereof with an output of another deceleration control signal generating means for another wheel group to cause the output of the associated deceleration control signal generating means to command a brake pressure level not less than that commanded by said other deceleration control signal generating means.
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35. A decelerational control system controlling the brake application means for a wheel of a vehicle comprising:
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analog signal generating means for producing a wheel speed signal that is a function of the rotational speed of said wheel; reference generating means for generating a reference velocity signal having a selectively variable rate of decrease; rate selector means for manually selecting a rate of decrease of said reference velocity signal indicative of a desired rate of deceleration; comparison means for comparing said wheel speed signal with said reference velocity signal for generating an error signal indicative of the difference between said wheel speed signal and said reference velocity signal; control means responsive to said error signal to provide a selected deceleration brake control signal; and means for deactuating said deceleration control signal generating means and for causing said deceleration control signal generating means incident to said deactuation to provide a deceleration control signal of gradually decreasing value to permit a gradual decrease in brake pressure.
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36. A deceleration control system controlling the brake application means associated with each wheel of group of braked load-bearing wheels of an aircraft comprising:
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analog signal generating means for each of said wheels for producing a wheel speed signal that is a function of the rotational speed of its associated wheel; reference generating means for generating a reference velocity signal having a selectively variable rate of decrease; rate selector means for manually selecting a rate of decrease of said reference velocity signal indicative of a desired rate of deceleration; averaging means responsive to the wheel speed signal associated with each of said wheels to form an average wheel speed signal therefrom; comparison means for comparing said average wheel speed signal with said reference velocity signal for generating an error signal indicative of the difference between said average wheel speed signal and said reference velocity signal; deceleration control signal generating means responsive to said error signal to provide a deceleration brake control signal; and means for deactuating said deceleration control signal generating means and for causing said deceleration control signal generating means to provide incident to said deactuation a deceleration control signal of gradually decreasing value to permit a gradual decrease in brake pressure.
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37. A deceleration control system for an aircraft having plural groups of braked load-bearing wheels, said system comprising:
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analog signal generating means associated with each of said wheels for producing a wheel speed signal that is a function of the rotation speed of its associated wheel; reference generating means for generating a reference velocity signal having a selectively variable rate of decrease; rate selector means for manually selecting a rate of decrease of said reference velocity signal indicative of a desired rate of deceleration; averaging means for each of said wheel groups for each of the wheels in its associated wheel group to form an average wheel speed signal therefrom; comparison means for each of said wheel groups for comparing said wheel speed signal for the associated wheel group with said reference velocity signal for generating an error signal indicative of the difference between said average wheel speed signal for the associated wheel group and said reference velocity signal; deceleration control signal generating means for each of said wheel groups responsive to said error signal for the associated wheel group to provide a deceleration brake control signal for the associated wheel group; and means for each of said wheel groups for deactuating said deceleration control signal generating means associated therewith and for causing said associated deceleration control signal generating means incident to said deactuation to provide a deceleration control signal of gradually decreasing value to permit a gradual decrease in brake pressure.
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38. A deceleration control system for an aircraft having plural groups of braked load-bearing wheels, said system comprising:
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analog signal generating means associated with each of said wheels for producing a wheel speed signal that is a function of the rotational speed of its associated wheel; reference generating means for generating a reference velocity signal having a selectively variable rate of decrease; rate selector means for manually selecting a rate of decrease of said reference velocity signal indicative of a desired rate of deceleration; averaging means for each of said wheel groups for each of the wheels in its associated wheel group to form an average wheel speed signal therefrom; comparison means for each of said wheel groups for comparing said wheel speed signal for the associated wheel group with said reference velocity signal for generating an error signal indicative of the difference between said average wheel speed signal for the associated wheel group and said reference velocity signal; deceleration control signal generating means for each of said wheel groups responsive to said error signal for the associated wheel group to provide a deceleration brake control signal for the associated wheel group; and a pressure balance means associated with each of said deceleration control signal generating means for comparing the signal formed thereby with the signal formed by another deceleration control signal generating means for another wheel group to cause the signal formed by said associated deceleration control signal generating means of the associated deceleration control signal generating means to command a brake pressure level not less than that commanded by said other deceleration control signal generating means.
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39. A brake control system for applying and controlling a brake application means for a wheel of a vehicle independently of operator brake application comprising:
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signal generating means for producing a first signal that is proportional to the speed of said wheel; reference generating means for generating a velocity reference signal having a selectively variable rate of decrease; rate selector means for manually selecting a rate of decrease of said reference velocity signal indicative of a desired rate of vehicle deceleration; comparison means for comparing said first signal with said reference signal for generating an error signal indicative of the difference between said first signal and said reference signal; and control means for providing a signal to said brake application means to apply brake pressure to said wheel independently of operator brake application and responsive to said error signal to provide a selected deceleration brake control signal for controlling said brake pressure in order to maintain said desired rate of deceleration. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46, 47, 48)
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Specification