Systems and methods for testing a steering control unit including a test stand
First Claim
1. A steering test stand for testing a steering control unit comprising:
- a first steering device comprising;
a steering gear;
a steering assistance unit having an interface to receive control from the steering control unit to be tested;
a measurement device configured to measure a first value of a steering torque on the first steering device and an actual steering angle on the first steering device;
a first drive motor coupled to the steering gear for applying a force or a torque to the steering gear; and
a second drive motor coupled to the first steering device, configured for setting a first steering angle on the first steering device according to a target steering angle;
a control unit coupled to the first drive motor and the second drive motor;
a first computer unit coupled to the control unit including a program for simulating static and/or dynamic properties of a motor vehicle, wherein the first computer unit is configured to receive the actual steering angle measured by the measurement device and to transmit simulated target values for the first drive motor and/or the second drive motor to the control unit; and
wherein a test driver unit includes a second steering device in the form of a force feedback steering wheel; and
wherein a first coupling is provided between the test driver unit and the control unit, and is configured to transmit a second steering angle, which is set on the force feedback steering wheel as the target steering angle and/or a steering angular velocity occurring on the force feedback steering wheel to the control unit; and
wherein a second coupling is provided between the test driver unit and the measurement device, which is configured to transmit the first value of the steering torque measured on the first steering device to the test driver unit; and
wherein the second steering device in the test driver unit is configured to set a second value of the steering torque as a function of the first value of the steering torque.
2 Assignments
0 Petitions
Accused Products
Abstract
A steering test stand has a first steering device with a measurement unit measuring the steering device torque value and applies forces to the steering device and control unit and has a control unit connected to a computer for controlling actuators. The computer simulates static and/or dynamic properties of a motor vehicle and transmits simulated target values to the control unit. A test driver unit comprises a second steering device as a force feedback steering wheel and a connection between the test driver unit and the computer, transmits a second steering angle set on the force feedback steering wheel. A second connection between the test driver unit and computer transmits steering torque measured on the first steering device to the test unit, such that the second steering device sets a second steering torque value on the force feedback steering wheel as a function of the first value.
-
Citations
21 Claims
-
1. A steering test stand for testing a steering control unit comprising:
-
a first steering device comprising; a steering gear; a steering assistance unit having an interface to receive control from the steering control unit to be tested; a measurement device configured to measure a first value of a steering torque on the first steering device and an actual steering angle on the first steering device; a first drive motor coupled to the steering gear for applying a force or a torque to the steering gear; and a second drive motor coupled to the first steering device, configured for setting a first steering angle on the first steering device according to a target steering angle; a control unit coupled to the first drive motor and the second drive motor; a first computer unit coupled to the control unit including a program for simulating static and/or dynamic properties of a motor vehicle, wherein the first computer unit is configured to receive the actual steering angle measured by the measurement device and to transmit simulated target values for the first drive motor and/or the second drive motor to the control unit; and wherein a test driver unit includes a second steering device in the form of a force feedback steering wheel; and wherein a first coupling is provided between the test driver unit and the control unit, and is configured to transmit a second steering angle, which is set on the force feedback steering wheel as the target steering angle and/or a steering angular velocity occurring on the force feedback steering wheel to the control unit; and wherein a second coupling is provided between the test driver unit and the measurement device, which is configured to transmit the first value of the steering torque measured on the first steering device to the test driver unit; and wherein the second steering device in the test driver unit is configured to set a second value of the steering torque as a function of the first value of the steering torque. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A method for testing a steering control unit by a steering test stand wherein the steering test stand includes a first steering device comprising, a steering assistance unit wherein the steering control unit to be tested is equipped to control the steering assistance unit;
- a measurement device;
a drive motor connected to the steering assistance unit;
a control unit coupled to the drive motor; and
a first computer unit comprising a program for simulating static and/or dynamic properties of a motor vehicle and coupled to the control unit; and
the method for testing comprising;measuring by use of the measurement device, a first value of a steering torque on the first steering device, and measuring an actual steering angle on the first steering device; receiving by the first computer unit the actual steering angle measured by the measurement device and simulating by use of the program for simulation target values for the drive motor and transmitting the target values to the control unit and applying via the drive motor a force or a torque calculated by the first computer unit to the steering assistance unit; and setting via the drive motor, a first steering′
angle according to a target steering angle on the steering assistance unit andproviding a test driver unit including a second steering device in the form of a force feedback steering wheel and transmitting via a first connection provided between the test driver unit and the control unit a second steering angle set on the force feedback steering wheel as the target steering angle and/or a steering angular velocity occurring on the force feedback steering wheel to the control unit, and providing a second connection between the test driver unit and the measurement device by means of which the first value of the steering torque measured on the first steering device is transmitted to the test driver unit such that a second value of a steering torque is set on the second steering device in the test driver unit as a function of the first value. - View Dependent Claims (13, 14)
- a measurement device;
-
12. A method for testing a first steering control unit by a steering test stand, wherein the steering test stand comprises a first steering device comprising a steering gear;
- a steering assistance unit wherein, the steering control unit to be tested is equipped to control the steering assistance unit;
a measurement device;
a first drive motor connected to the steering gear;
a second drive motor connected to the first steering device;
a control unit connected to the first drive motor and the second drive motor;
a first computer unit connected to the control unit and equipped with a program for simulation of static and/or dynamic properties of a motor vehicle; and
the method for testing comprising;measuring on the first steering device a first value of a steering torque and an actual steering angle, and receiving by the first computer unit the actual steering angle measured by the measuring device and transmitting to the control unit target values for the first drive motor and/or the second drive motor simulated by using the program for simulation of static and/or dynamic properties of a motor vehicle and applying a force or torque to the steering gear via the first drive motor; and setting a first steering angle according to a target steering angle on the first steering device via the second drive motor; providing a test driver unit comprising a second steering device in the form of a force feedback steering wheel and providing a first connection between the test driver unit and the control unit and transmitting a second steering angle set on the force feedback steering wheel as the target steering angle and/or a steering angular velocity occurring on the force feedback steering wheel to the control unit, and providing a second connection between the test driver unit and the measurement device by means of which the first value of the steering torque measured on the first steering device is transmitted to the test driver unit such that a second value of a steering torque is set on the second steering device in the test driver unit as a function of the first value.
- a steering assistance unit wherein, the steering control unit to be tested is equipped to control the steering assistance unit;
-
15. A steering test stand used for testing a steering control unit of a motor vehicle steering system having a steering column and a steering assistance unit, the steering test stand comprising:
-
(a) a measurement device having (i) a measurement input that is configured to be coupled to the motor vehicle steering system being tested, and (ii) a measurement output that is configured to output (1) a measured steering torque value applied to the motor vehicle steering system being tested, and (2) a measured actual steering angle of the motor vehicle steering system being tested; (b) a computer unit coupled to the measurement output and configured to generate properties of a simulated motor vehicle unit based on the measured steering torque value and the measured actual steering angle received from the measurement output and to output simulated target values; (c) a drive motor configured to be (i) couplable to the steering assistance unit of the motor vehicle steering system being tested, and (ii) capable of setting a steering angle on the steering assistance unit and capable of applying a force or torque to the steering assistance unit; (d) a control unit coupled to the computer unit and the drive motor and configured to receive the simulated target values from the computer unit and control the drive motor in accordance with the simulated target values; and (e) a test driver steering unit including a force feedback steering wheel, wherein the test driver steering unit is coupled to the measurement output and the control unit and configured to transmit inputs to the control unit and receive the measured steering torque value from the measurement device, and wherein the test driver steering unit is further configured to use the measured steering torque value to set an applied steering torque value on the force feedback steering wheel, such that the applied steering torque value is a function of the measured steering torque value. - View Dependent Claims (16, 17, 18, 19, 20, 21)
-
Specification