Intelligent mechatronic control suspension system based on quantum soft computing
First Claim
1. A quantum search system for global optimization of a knowledge base and a robust fuzzy control algorithm design for an intelligent mechatronic control suspension system based on quantum soft computing, comprising:
- a quantum genetic search module configured to develop a teaching signal for a fuzzy-logic suspension controller, said teaching signal configured to provides a desired set of control qualities over different types of roads;
a genetic analyzer module configured to produce a plurality of solutions, at least one solution for each of said different types of roads; and
a quantum search module configured to search said plurality of solutions for information to construct said teaching signal.
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Abstract
A control system for optimizing a shock absorber having a non-linear kinetic characteristic is described. The control system uses a fitness (performance) function that is based on the physical laws of minimum entropy and biologically inspired constraints relating to mechanical constraints and/or rider comfort, driveability, etc. In one embodiment, a genetic analyzer is used in an off-line mode to develop a teaching signal. The teaching signal can be approximated online by a fuzzy controller that operates using knowledge from a knowledge base. A learning system is used to create the knowledge base for use by the online fuzzy controller. In one embodiment, the learning system uses a quantum search algorithm to search a number of solution spaces to obtain information for the knowledge base. The online fuzzy controller is used to program a linear controller.
62 Citations
50 Claims
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1. A quantum search system for global optimization of a knowledge base and a robust fuzzy control algorithm design for an intelligent mechatronic control suspension system based on quantum soft computing, comprising:
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a quantum genetic search module configured to develop a teaching signal for a fuzzy-logic suspension controller, said teaching signal configured to provides a desired set of control qualities over different types of roads;
a genetic analyzer module configured to produce a plurality of solutions, at least one solution for each of said different types of roads; and
a quantum search module configured to search said plurality of solutions for information to construct said teaching signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A control system for a plant comprising:
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a neural network configured to control a fuzzy controller, said fuzzy controller configured to control linear controller that controls said plant;
a genetic analyzer configured to train said neural network, said genetic analyzer comprising a fitness function that reduces sensor information while reducing entropy production based on biologically-inspired constraints. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method for controlling a nonlinear plant by obtaining an entropy production difference between a time derivative dSu/dt of an entropy of the plant and a time derivative dSc/dt of an entropy provided to the plant from a controller;
- using a genetic algorithm that uses the entropy production difference as a performance function to evolve a control rule in an off-line controller;
filtering control rules from an off-line controller to reduce information content and providing filtered control rules to an online controller to control the plant. - View Dependent Claims (22, 23)
- using a genetic algorithm that uses the entropy production difference as a performance function to evolve a control rule in an off-line controller;
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24. A self-organizing control system, comprising:
- a simulator configured to use a thermodynamic model of a nonlinear equation of motion for a plant, a fitness function module that calculates a fitness function based on an entropy production difference between a time differentiation of an entropy of said plant dSu/dt and a time differentiation dSc/dt of an entropy provided to the plant by a linear controller that controls the plant;
a genetic analyzer that uses said fitness function to provide a plurality of teaching signals, each teaching signal corresponding to a solution space;
a quantum search algorithm module configured to find a global teaching signal from said plurality of teaching signals;
a fuzzy logic classifier that determines one or more fuzzy rules by using a learning process and said global teaching signal; and
a fuzzy logic controller that uses said fuzzy rules to set a control variable of the linear controller. - View Dependent Claims (25)
- a simulator configured to use a thermodynamic model of a nonlinear equation of motion for a plant, a fitness function module that calculates a fitness function based on an entropy production difference between a time differentiation of an entropy of said plant dSu/dt and a time differentiation dSc/dt of an entropy provided to the plant by a linear controller that controls the plant;
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26. A control system comprising:
- a genetic algorithm that provides a plurality of teaching signals corresponding to a plurality of spaces using a fitness function that provides a measure of control quality based on reducing production entropy in each space;
a local entropy feedback loop that provides control by relating stability of a plant and controllability of the plant; and
a quantum search module to provide a global control teaching signal from said plurality of teaching signals. - View Dependent Claims (27, 28, 29, 30)
- a genetic algorithm that provides a plurality of teaching signals corresponding to a plurality of spaces using a fitness function that provides a measure of control quality based on reducing production entropy in each space;
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31. An optimization control method for a shock absorber comprising the steps of:
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obtaining a difference between a time differential of entropy inside a shock absorber and a time differential of entropy given to said shock absorber from a control unit that controls said shock absorber; and
optimizing at least one control parameter of said control unit by using a genetic algorithm and a quantum search algorithm, said genetic algorithm using said difference as a fitness function, said fitness function constrained by at least one biologically-inspired constraint. - View Dependent Claims (32, 33, 34, 35, 36)
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37. A method for control of a plant comprising the steps of:
- calculating a first entropy production rate corresponding to an entropy production rate of a control signal provided to a model of said plant;
calculating a second entropy production rate corresponding to an entropy production rate of said model of said plant;
determining a fitness function for a genetic optimizer using said first entropy production rate and said second entropy production rate;
providing said fitness function to said genetic optimizer;
providing a teaching output from said genetic optimizer to a quantum search algorithm followed by an information filter;
providing a compressed teaching signal from said information filter to a fuzzy neural network, said fuzzy neural network configured to produce a knowledge base;
providing said knowledge base to a fuzzy controller, said fuzzy controller using an error signal and said knowledge base to produce a coefficient gain schedule; and
providing said coefficient gain schedule to a linear controller. - View Dependent Claims (38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49)
- calculating a first entropy production rate corresponding to an entropy production rate of a control signal provided to a model of said plant;
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50. A control apparatus comprising:
- off-line optimization means for determining a control parameter from an entropy production rate to produce a knowledge base from a compressed teaching signal found by a quantum search algorithm; and
online control means for using said knowledge base to develop a control parameter to control a plant.
- off-line optimization means for determining a control parameter from an entropy production rate to produce a knowledge base from a compressed teaching signal found by a quantum search algorithm; and
Specification