Adaptive control system for vehicles

• US 5,094,127 A
• Filed: 11/16/1990
• Issued: 03/10/1992
• Est. Priority Date: 11/21/1989
• Status: Expired due to Fees

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Ito, Osamu, Takada, Masahiro, Ishida, Akira, Narazaki, Kazushige
• Primary Examiner(s): Diehl, Dwight
• Application Number:
  US07/614,514
• Time in Patent Office: 480 Days
• Field of Search: 74/857, 74/889, 74/866, 180/175-179, 280/91, 364/426.04
• US Class Current: 477/108
• CPC Class Codes: B60K 31/047 the memory being digital
• CPC Class Codes: B60W 2050/0031 Mathematical model of the vehicle
• CPC Class Codes: B60W 2050/0042 Transfer function lag; delays
• CPC Class Codes: B60W 2520/125 Lateral acceleration
• CPC Class Codes: B60W 2520/14 Yaw
• CPC Class Codes: B60W 2540/18 Steering angle
• CPC Class Codes: B60W 2710/0605 Throttle position
• CPC Class Codes: B62D 7/159 characterised by computing methods or stabilisation processes or systems, e.g. responding to yaw rate, lateral wind, load, road condition
• CPC Class Codes: G05B 13/04 involving the use of models or simulators
• CPC Class Codes: Y10S 477/903 Control signal is steering

Abstract

An adaptive control system for vehicles using a time delay control method which applies a reference model for giving desired response characteristics, assumes that terms of an unknown section such as for variations of plant dynamics are constant for a minute time period, and estimates this variation of the unknown section to calculate a control input that follows said reference model.

Claims

1. An adaptive control system for controlling a response characteristic of a vehicle driven by a motor having at least one dynamic variable, said adaptive control system comprising:

actuator means for controlling said dynamic variable;

detection means for detecting said motor variable and producing a corresponding instantaneous value output representative thereof;

reference model means for storing predetermined desired values for said motor variable representing a predetermined desired motor response characteristic;

desired value setting means for setting said motor variable to a desired value;

controlled variable calculation means for calculating a control input to said actuator means in accordance with said instantaneous value output from said detection means and predetermined desired values retrieved from said reference model means, whereby

said actuator means controls said motor variable in accordance with said desired value set by said desired value setting means.

2. An adaptive control system for vehicles according to claim 1, wherein said actuator means is a drive unit for controlling an opening of an engine throttle value.

3. An adaptive control system for vehicles according to claim 2, wherein said drive unit is an actuator for adjusting a throttle valve opening to control a vehicle speed at any desired vehicle speed, and said desired vehicle speed is the same value as detected by said detection means at an arbitrary time and is given by said desired value setting means.

4. An adaptive control system for vehicles according to claim 1, wherein said actuator includes two steering angle control units for controlling steering angles of the front and rear wheels respectively at any desired steering angle, said detection means comprises means for detecting a yaw rate of said vehicle body and means for detecting a side slip angle of the vehicle body, and said controlled variable calculation means calculates said steering angles of the front and rear wheels.

5. An adaptive control system as in claim 1, wherein said dynamic variable is one of oil pressure, engine compression and engine speed.