Control apparatus for controlling a plant by using a delta-sigma modulation algorithm
AssigneeHonda Motor Co., Ltd.
InventorYuji Yasui
Life of this patent
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Abstract
The invention provides a control apparatus comprising a controller for determining a manipulated variable for manipulating a controlled object so that an output of the controlled object converges to a desired value and a modulator for modulating the manipulated variable by using one of a delta-sigma modulation algorithm, a sigma-delta modulation algorithm and a delta modulation algorithm to generate a modulated signal to be applied to the controlled object. The modulator generates the modulated signal so that a center value of an amplitude of the modulated signal follows a change of the manipulated variable. Thus, the modulated signal in which the manipulated variable is reflected without any loss can be generated even when the manipulated variable changes.
Claims21
A control apparatus comprising:
- a controller for determining a manipulated variable for manipulating a controlled object to cause an output of the controlled object to converge to a desired value;
- and
- a modulator for modulating the manipulated variable by using one of a delta-sigma modulation algorithm, a sigma-delta modulation algorithm and a delta modulation algorithm to generate a modulated signal;
- an adaptive offset generator for generating an adaptive offset value that follows a change in the manipulated variable;
- and
- an offset element for offsetting the modulated signal in accordance with the adaptive offset value such that the central value of the amplitude of the modulated signal becomes equal to the adaptive offset value, thereby causing the modulated signal applied to the controlled object to follow the manipulated variable.
A method for controlling a controlled object, the method comprising the steps of:
- determining a manipulated variable for manipulating the controlled object to cause an output of the controlled object to converge to a desired value;
- modulating the manipulated variable by using one of a delta-sigma modulation algorithm, a sigma-delta modulation algorithm and a delta modulation algorithm;
- and
- through the modulation of the manipulated variable, generating a modulated signal that is to be applied to the controlled object so that a center value of an amplitude of the modulated signal follows a change of the manipulated variable.
A control apparatus comprising:
- manipulation means for determining a manipulated variable for manipulating the controlled object to cause an output of the controlled object to converge to a desired value;
- and
- modulation means for modulating the manipulated variable by using one of a delta-sigma modulation algorithm, a sigma-delta modulation algorithm and a delta modulation algorithm to generate a modulated signal that is to be applied to the controlled object, the modulation means generating the modulated signal so that a center value of an amplitude of the modulated signal follows a change of the manipulated variable.
Dependencies are inferred from the claim text.