The Toyota active control suspension is the first system for passenger cars that actively controls suspension by means of a hydropneumatic system. The authors describe the electronic control unit (ECU), which executes high-speed and highly-accurate processing, and the high-resolution sensors developed for the Toyota Celica's active control suspension. The ECU has two custom C-MOS 8-b single-chip microcomputers (main-CPU and sub-CPU). The main-CPU primarily processes basic control operations, while the sub-CPU processes input and output signals. The acceleration (G) sensor with amorphous-metal-thin-film distortion gauges detects both longitudinal and lateral acceleration of the vehicle. There are two kinds of height sensors, contact-free magnetic angle sensors with a Hall element and magnetoresistive elements for detecting the suspension stroke of each wheel. There are also two types of pressure sensors, those that have a silicon piezoresistive gauge and those that have an amorphous-metal-thin-film distortion gauge, for detecting the cylinder and system pressure.
Development of an electronic control system for active suspension
Entwicklung eines elektronischen Regelungssystems für aktive Fahrwerke
Proceedings of the 29th IEEE Conference on Decision and Control ; 4 ; 2220-2225
1990
6 Seiten, 19 Quellen
Conference paper
English
Suspension actuator, active suspension system and control method of active suspension system
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