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US 11,874,644 B2Granted
Position or velocity control system and method
AssigneeTexas Instruments Incorporated
InventorsRajan Lakshmi Narasimha, David Patrick Magee
Life of this patent
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Abstract
In described examples of methods and control systems to control a position and/or velocity of a machine, control circuitry is coupled to receive and dither a control signal, and to compute a control output value according to the dithered control signal and a control function. An inverter is coupled to the control circuitry, to control the position and/or velocity according to the control output value.
Claims18
A circuit to control a position and velocity of a machine, the circuit comprising:
- an electronic memory;
- and
- a processor configured to execute program instructions stored in the electronic memory to:
- control the position according to a reference position pulse signal;
- compute a parameter according to a velocity error value and a control function;
- compute a control output value as a sum of the parameter and a dithering signal value, including by:
- adjusting the parameter according to a machine position dependent waveform shaping function and a machine position feedback signal;
- and
- computing the control output value as a sum of the adjusted parameter and the dithering signal value;
- and
- control the position and velocity according to the control output value.
8 more elements
A method of controlling a position and velocity of a machine, the method comprising:
- controlling the position according to a reference position pulse signal;
- computing a parameter according to a velocity error value and a control function;
- computing a control output value as a sum of the parameter and a dithering signal value, including by:
- adjusting the parameter according to a machine position dependent waveform shaping function and a machine position feedback signal;
- and
- computing the control output value as a sum of the adjusted parameter and the dithering signal value;
- and
- controlling the position and velocity according to the control output value.
5 more elements
A light projection system comprising:
- a color wheel;
- a motor coupled to the color wheel;
- an inverter coupled to the motor;
- and
- control circuitry coupled to the inverter, the control circuitry comprising;
- an electronic memory;
- and
- a processor configured to execute program instructions stored in the electronic memory to:
- control the position according to a reference position pulse signal;
- compute a parameter according to a velocity error value and a control function;
- compute a control output value as a sum of the parameter and a dithering signal value, including by:
- adjusting the parameter according to a machine position dependent waveform shaping function and a machine position feedback signal;
- and
- computing the control output value as a sum of the adjusted parameter and the dithering signal value;
- and
- control the position and velocity according to the control output value.
13 more elements
A method of controlling a position and velocity of a color wheel, the method comprising:
- controlling the position according to a reference position pulse signal;
- computing a parameter according to a velocity error value and a control function;
- computing a control output value as a sum of the parameter and a dithering signal value, including by:
- adjusting the parameter according to a position of the color wheel dependent waveform shaping function and a color wheel position feedback signal;
- and
- computing the control output value as a sum of the adjusted parameter and the dithering signal value;
- and
- controlling the position and velocity according to the control output value.
5 more elements
A light projection system comprising:
- a color wheel;
- a motor coupled to the color wheel;
- and
- control circuitry coupled to the inverter, the control circuitry comprising;
- an electronic memory;
- and
- a processor configured to execute program instructions stored in the electronic memory to:
- control the position according to a reference position pulse signal;
- compute a parameter according to a velocity error value and a control function;
- compute a control output value as a sum of the parameter and a dithering signal value, including by:
- adjusting the parameter according to a machine position dependent waveform shaping function and a machine position feedback signal;
- and
- computing the control output value as a sum of the adjusted parameter and the dithering signal value;
- and
- control the position and velocity according to the control output value.
12 more elements
Dependencies are inferred from the claim text.