Vehicle state value detecting device
First Claim
1. A vehicle state value detecting device, comprising:
- a state value detecting unit for detecting a state variable of a vehicle;
a first low pass filter that cuts off a high frequency component from an output signal of the state value detecting unit at a first cutoff frequency;
a second low pass filter that is connected in parallel with the first lower pass filter and cuts off a high frequency component from an output signal of the state value detecting unit at a second cutoff frequency lower than the first cutoff frequency;
a vehicle condition detecting unit for detecting a first condition and a second condition of the vehicle; and
a signal selecting unit for selecting an output signal of the first low pass filter when the first condition is detected and an output signal of the second low pass filter when the second condition is detected.
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Accused Products
Abstract
The vehicle state value detecting device includes a first low pass filter (32, 36) and a second low pass filter (33, 37) having a lower cutoff frequency than the first low pass filter. The device processes a detection signal of a sensor (10, 11) for a motion control of a vehicle such as a yaw rate sensor and a lateral G sensor by selectively using one of the two low pass filters. A signal selecting unit (35, 39) selects the output of the first low pass filter when the control process demands prompt detection of an abrupt changes in the behavior of the vehicle and the output of the second low pass filter when it is not the case and an enhanced stability of the control action has a priority.
10 Citations
11 Claims
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1. A vehicle state value detecting device, comprising:
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a state value detecting unit for detecting a state variable of a vehicle; a first low pass filter that cuts off a high frequency component from an output signal of the state value detecting unit at a first cutoff frequency; a second low pass filter that is connected in parallel with the first lower pass filter and cuts off a high frequency component from an output signal of the state value detecting unit at a second cutoff frequency lower than the first cutoff frequency; a vehicle condition detecting unit for detecting a first condition and a second condition of the vehicle; and a signal selecting unit for selecting an output signal of the first low pass filter when the first condition is detected and an output signal of the second low pass filter when the second condition is detected. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification