Method for regulating position and/or speed

• US 8,639,417 B2
• Filed: 04/15/2011
• Issued: 01/28/2014
• Est. Priority Date: 04/17/2010
• Status: Active Grant

• Current Assignee: Audi AG (Volkswagen AG)
• Original Assignee: Audi AG (Volkswagen AG)
• Inventors: Illg, Matthias, Hellenthal, Berthold
• Primary Examiner(s): Trammell, James
• Assistant Examiner(s): TESTARDI, DAVID A
• Application Number:
  US13/641,792
• Publication Number:
  US 20130103266A1
• Time in Patent Office: 1,019 Days
• Field of Search: 701/49, 318/599
• US Class Current: 701/49
• CPC Class Codes: G05B 19/19 characterised by positioning or contouring control systems, e.g. to control position from one programmed point to another or to control movement along a programmed continuous path
• CPC Class Codes: G05B 19/23 for point-to-point control
• CPC Class Codes: G05B 19/416 characterised by control of velocity, acceleration or deceleration G05B19/19 takes precedence
• CPC Class Codes: G05B 2219/42238 Control motor position with direction signal and pwm signal for position
• CPC Class Codes: H02P 23/18 Controlling the angular speed together with angular position or phase

Abstract

A method regulates the position and/or speed of a device which can be moved along a predefined course using an electric motor. The regulating operation is carried out continuously in such a manner that targeted fluctuation of the controlled variables of position and/or speed around their desired values is respectively achieved within a predefinable tolerance range by selecting a manipulated variable.

Claims

1. A method for regulating a position and speed of a retractable display apparatus which is arranged inside a motor vehicle and can be moved along a predefined course using an electric motor, the method comprising:

performing a regulating operation to control the electric motor using pulse width modulation as a manipulated variable;

setting position and speed as controlled variables;

performing the regulating operation continuously in such a manner that targeted fluctuation of the controlled variables of position and speed around their desired values is respectively achieved within a predefinable tolerance range by setting the manipulated variable;

using an array to describe a desired position of the retractable display apparatus arranged inside the motor vehicle at a particular time;

comparing, in two first tables, the desired controlled variable values with actual controlled variable values for determining a degree of deviation of each of the controlled variables; and

during the regulating operation, using a second table for determining correction values for the pulse width modulation as the manipulated variable.

2. A method according to claim 1, wherein a current rotational speed of the electric motor is detected using at least one Hall sensor.

3. A method according to claim 1, wherein only integer arithmetic operations are used during the regulating operation.

4. A method according to claim 1, wherein the retractable display apparatus arranged inside the motor vehicle is an LCD display of a vehicle system of the motor vehicle.

5. A method according to claim 1, wherein the controlled variables of position and speed are each always kept in a tolerance range defined by a first amount above the desired value and by a second amount below the desired value.

6. A method according to claim 1, wherein addition, subtraction, and a comparison operation are used during the regulating operation.

7. A regulating and control device of a motor vehicle configured to perform a method for regulating a position and speed of a retractable display apparatus which is arranged inside a motor vehicle and can be moved along a predefined course using an electric motor, the method comprising:

performing a regulating operation to control the electric motor using pulse width modulation as a manipulated variable;

setting position and speed as controlled variables;

performing the regulating operation continuously in such a manner that targeted fluctuation of the controlled variables of position and speed around their desired values is respectively achieved within a predefinable tolerance range by setting the manipulated variable;

using an array to describe a desired position of the retractable display apparatus arranged inside the motor vehicle at a particular time;

comparing, in two first tables, the desired controlled variable values with actual controlled variable values for determining a degree of deviation of each of the controlled variables; and

during the regulating operation, using a second table for determining correction values for the pulse width modulation as the manipulated variable.

8. A method for regulating a position and speed of a retractable display apparatus which is arranged inside a motor vehicle and can be moved along a predefined course using an electric motor, the method comprising:

performing a regulating operation to control the electric motor using pulse width modulation as a manipulated variable;

setting position and speed as controlled variables;

performing the regulating operation continuously in such a manner that targeted fluctuation of the controlled variables of position and speed around their desired values is respectively achieved within a predefinable tolerance range by setting the manipulated variable;

using an array to describe a desired position of the retractable display apparatus arranged inside the motor vehicle at a particular time;

using two first tables for determining a degree of deviation of each of the controlled variables; and

during the regulating operation, using a second table for determining correction values for the pulse width modulation as the manipulated variable,

wherein the correction values are determined from the second table based on the degree of deviation of each of the controlled variables.