Obtain action data specifications from reinforcement learning environment or agent
Extract Action and Observation Information from Reinforcement Learning Environment
Extract action and observation information that you can use to create other environments or agents.
The reinforcement learning environment for this example is the simple longitudinal dynamics for ego car and lead car. The training goal is to make the ego car travel at a set velocity while maintaining a safe distance from lead car by controlling longitudinal acceleration (and braking). This example uses the same vehicle model as the Adaptive Cruise Control System Using Model Predictive Control (Model Predictive Control Toolbox) example.
Open the model and create the reinforcement learning environment.
mdl = 'rlACCMdl'; open_system(mdl); agentblk = [mdl '/RL Agent']; % create the observation info obsInfo = rlNumericSpec([3 1],'LowerLimit',-inf*ones(3,1),'UpperLimit',inf*ones(3,1)); obsInfo.Name = 'observations'; obsInfo.Description = 'information on velocity error and ego velocity'; % action Info actInfo = rlNumericSpec([1 1],'LowerLimit',-3,'UpperLimit',2); actInfo.Name = 'acceleration'; % define environment env = rlSimulinkEnv(mdl,agentblk,obsInfo,actInfo)
env = SimulinkEnvWithAgent with properties: Model : rlACCMdl AgentBlock : rlACCMdl/RL Agent ResetFcn :  UseFastRestart : on
The reinforcement learning environment
env is a
SimulinkWithAgent object with the above properties.
Extract the action and observation information from the reinforcement learning environment
actInfoExt = getActionInfo(env)
actInfoExt = rlNumericSpec with properties: LowerLimit: -3 UpperLimit: 2 Name: "acceleration" Description: [0x0 string] Dimension: [1 1] DataType: "double"
obsInfoExt = getObservationInfo(env)
obsInfoExt = rlNumericSpec with properties: LowerLimit: [3x1 double] UpperLimit: [3x1 double] Name: "observations" Description: "information on velocity error and ego velocity" Dimension: [3 1] DataType: "double"
The action information contains acceleration values while the observation information contains the velocity and velocity error values of the ego vehicle.
env — Reinforcement learning environment
Reinforcement learning environment from which the action information has to be
extracted, specified as a
For more information on reinforcement learning environments, see Create Simulink Reinforcement Learning Environments.