DYNA4 - Function Development in Closed-Loop System Tests
DYNA4 is an open simulation environment for the virtual test driving of cars and commercial vehicles. The physical models include vehicle dynamics, powertrain, combustion engines, electric motors, sensors and traffic. Virtual test drives with DYNA4 facilitate safe and efficient function development and testing. Closed-loop simulations on the PC run faster than in real-time, e.g. for use in early development stages (MIL, SIL), or can be executed on Hardware-in-the-Loop systems (HIL) when ECUs are available. DYNA4’s 3D environment simulation with road infrastructure and traffic provides virtual test fields for assisted and automated driving wherever environment perception plays a key role.
Frontloading: testing and development of ECU functions in early stages
Safe testing in critical driving maneuvers, including near crash situations or vulnerable road users
Parameter variations for thousands of automated driving tests
Weather independence: reproducible environment conditions with rain, snow, fog, wind etc.
Direct comparison of configurations, variants etc.
Optimization of complex systems, e.g. operating strategies with many application parameters
Traceability of test runs through management and versioning of simulation input and output
Based on practical examples, GKN explains their global vehicle simulation strategy
Video: Closed-loop simulation for the development of vehicle stability functions, such as ESC, ABS etc.
Video: Stimulate ADAS functions in virtual test drives. Benefits of closed-loop simulation with DYNA4 for ADAS function development.
Testing ADAS functions in a virtual world with traffic and environment sensors
Energy analyses of a hybrid powertrain on a virtual dynamometer
Comparing vehicle dynamics behavior with different tire inflation
DYNA4 GUI with Model Data View and running 3D visualization
Video: How to use virtual test driving in Closed-Loop-Simulations for ADAS testing.
Simulation of lidar sensor and image segmentation as input for ADAS function development
Environment perception: Lane detection, traffic sign recognition, object detection, simultaneous localization and mapping (SLAM) etc.
Comfort functions: Adaptive cruise control (ACC), traffic jam assistant, parking pilot etc.
Safety systems: Pre-crash, front collision warning (FCW), automated emergency braking (AEB), lane keeping assistant, blind spot monitoring etc.
Car2x: Connected and cooperative driving
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Virtual Test Drives with Precise Vehicle Dynamics
Simulation-based ESC homologation, Sine-with-Dwell test
Chassis control systems: Electronic stability control (ABS, ASR, ESC), active roll compensation, trailer stabilization, active suspension control etc.
Steering control: Power steering, rear-wheel steering, superposition steering etc.
Commercial vehicles with up to two trailers
Virtual axle and tire test stands for generation and validation of model parameters
Complete vehicle simulation for testing the interdependencies of networked ECUs
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System Simulation and Energy Management
Energy management analyses: Virtual driving of NEFZ, WLTP and others
CO2 reduction: Energy consumption prognosis for vehicles with conventional, hybrid or full electric powertrains and auxiliary units
Predictive energy management functions
Hybrid control units: Development, optimization and testing of hybrid control functions
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Simulation of Combustion Engines from MIL to HIL
Engine management functions and on-board diagnosis
Proof-of-concept studies during early development
HIL simulators for testing of engine control units and components
Analysis of design concepts for gasoline, diesel, and alternative fuels passenger car engines, high-speed race engines, heavy duty engines and marine engines
Design of controllers for supercharging, variable valve actuation, HCCI, and EGR
Test and development of controllers for exhaust aftertreatment
Hardware-in-the-loop tests for engine controllers with cylinder pressure sensing
Feasibility studies and evaluation of engine design
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Standards for Virtual Test Drives
In light of increasingly complex driving functions and their networking in the vehicle, simulation has become a standard tool from function development to validation. But how can virtual test drives be used flexibly and sustainably across disciplines? Standards such as OpenDRIVE, OpenSCENARIO, OSI, FMI, and MDF are important cornerstones in the area of system integration, data management, and test evaluation.
In our technical article "Standards for Virtual Test Drives" (Hanser Automotive Issue 6/2020) we explain how the consistent use of standards enables the reuse of virtual test drives continuously along the entire development process.