자동차 응용 사례

Combine Stateflow® with Simulink® to model hybrid systems. This type of modeling is particularly useful for systems that have numerous possible operational modes based on discrete events. Traditional signal flow is handled in Simulink while changes in control configuration are implemented in Stateflow. The model described in this example represents a fuel control system for a gasoline engine. The system is robust in that individual sensor failures are detected and the control system is dynamically reconfigured for uninterrupted operation.

Use data dictionaries to manage the data for a fuel rate control system designed using Simulink® and Stateflow®.

Model a four-cylinder spark ignition internal combustion engine from the throttle to the crankshaft output using triggered subsystems. In this example, the sldemo_engine model is based on [1].

Enhance a version of the open-loop engine model described in Model Engine Timing Using Triggered Subsystems. This model, sldemo_enginewc, contains a closed-loop and shows the flexibility and extensibility of Simulink® models. In this enhanced model, the objective of the controller is to regulate engine speed with a fast throttle actuator, such that changes in load torque have minimal effect. This is easily accomplished in Simulink by adding a discrete-time PI controller to the engine model.

Use Simulink® to model and simulate a rotating clutch system. Although modeling a clutch system is difficult because of topological changes in the system dynamics during lockup, this example shows how enabled subsystem can easily handle such problems. We illustrate how to employ important Simulink modeling concepts in the creation of the clutch simulation. Designers can apply these concepts to many models with strong discontinuities and constraints that may change dynamically.

Use If/Else subsystems to build a clutch model. An 'If' subsystem models the clutch dynamics in the locked position while an 'Else' subsystem models the unlocked position. One or the other is enabled using the 'If' block. The dot-dashed lines from the 'If' block denote control signals, which are used to enable If/Else (or other conditional) subsystems. Checking any of the boxes on the GUI produces a plot of any of the selected variables (versus time).

이 예제에서는 간단한 ABS(잠금 방지 제동 시스템)를 모델링하는 방법을 보여줍니다. 이 모델은 이동체가 급제동하는 조건에서의 동적 동작을 시뮬레이션합니다. 이 모델은 바퀴 하나를 표현하며, 이 모델을 여러 번 복제하여 바퀴가 여러 개인 이동체 모델을 만들 수 있습니다.

이 예제에서는 독립식 전륜 및 후륜 수직 서스펜션을 포함하는 단순한 반차량(half-car) 모델을 모델링하는 방법을 보여줍니다. 이 모델에는 차체의 피치와 바운스 자유도도 포함됩니다. 이 예제는 승차감 특성을 조사하는 데 사용할 수 있는 시뮬레이션 방식을 보여주는 모델을 설명합니다. 이 모델을 파워트레인 시뮬레이션과 함께 사용하면 스로틀 설정의 변동으로 인해 발생하는 종방향의 셔플 현상을 조사할 수 있습니다.

Model an automotive drivetrain with Simulink®. Stateflow® enhances the Simulink model with its representation of the transmission control logic. Simulink provides a powerful environment for the modeling and simulation of dynamic systems and processes. In many systems, though, supervisory functions like changing modes or invoking new gain schedules must respond to events that may occur and conditions that develop over time. As a result, the environment requires a language capable of managing these multiple modes and developing conditions. In the following example, Stateflow shows its strength in this capacity by performing the function of gear selection in an automatic transmission. This function is combined with the drivetrain dynamics in a natural and intuitive manner by incorporating a Stateflow block in the Simulink block diagram.

Simulate the electrical system of a vehicle using Simulink® and Simscape™ Electrical™.

Simulate an automatic climate control system in a car using Simulink® and Stateflow®.

Model a vehicle climate control system with an electrical system. Use the model to examine the loading effects of the climate control system on the entire vehicle electrical system.

Use Model-Based Design to implement a power window system for an automobile.

Model a wireless tire pressure monitoring system with fault logging using message communication.