org.lsst.ccs.subsystems.shutter.sim

Class BladeSetSimulator

java.lang.Object

org.lsst.ccs.subsystems.shutter.sim.BladeSetSimulator

All Implemented Interfaces:

BladeSet

public final class BladeSetSimulator
extends Object
implements BladeSet

Describes one simulated blade set.

At present the simulation doesn't use a blade set configuration and so calculates only relative blade set positions for both the motor samples and the Hall transitions. The motor simulation calculates position samples at intervals of roughly 50 milliseconds.

The index tells which side of the shutter the blade set is on and is also used to determine the initial relative position of the blade set's edge: 0.0 for index 0 and 1.0 for index 1. See BladePosition.

Thread publication policy: shared, thread-safe. Instances can be accessed safely through the public interface by multiple threads.

Author:

azemoon, tether

Constructor Summary

Constructors

Constructor and Description
BladeSetSimulator(int index) Sets the index and initial relative position of the blade set.

Method Summary

Modifier and Type	Method and Description
BladeSetConfiguration	getBladeSetConfiguration() Not yet supported.
double	getCurrentPosition() Gets the current relative position of the edge of the blade set.
int	getIndex() Gets the index.
MovementHistory	moveToPosition(double targetPosition, double moveTimeSeconds) Performs a simulated motion of the blade set.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.lsst.ccs.subsystems.shutter.common.BladeSet

init

Constructor Detail

BladeSetSimulator

public BladeSetSimulator(int index)

Sets the index and initial relative position of the blade set. The initial position of set 0 is 0.0, that of set 1 is 1.0.

Parameters:

index - the blade set index

Method Detail

getBladeSetConfiguration

public BladeSetConfiguration getBladeSetConfiguration()

Not yet supported.

Specified by:

getBladeSetConfiguration in interface BladeSet

Returns:

the BladeSet configuration

Throws:

UnsupportedOperationException - always

getCurrentPosition

public double getCurrentPosition()

Gets the current relative position of the edge of the blade set.

Specified by:

getCurrentPosition in interface BladeSet

Returns:

The position.

See Also:

BladePosition

getIndex

public int getIndex()

Gets the index.

Specified by:

getIndex in interface BladeSet

Returns:

The index (0 or 1).

moveToPosition

public MovementHistory moveToPosition(double targetPosition,
                                      double moveTimeSeconds)

Performs a simulated motion of the blade set.

Specified by:

moveToPosition in interface BladeSet

Parameters:

targetPosition - The desired final relative position of the blade set's edge.

moveTimeSeconds - How long the move should take.

Returns:

The movement history, which includes time-ordered lists of motor position samples and Hall transitions.

After returning the current position will be seen to be targetPosition in any thread.