//@pausable
do {
	//@previous initialValue = new ControlSignal( force => 0 )
	accept(ctlInitialInstant:ControlSignal);
	if (ctlInitialInstant == null) {
		force = 0;
	} else {
		//@previous initialValue = new ControlSignal( force => 0 )
		accept(ctl:ControlSignal);
		force = ctl.force;
	}

	this.force = force;
	//@edge
	v = this.velocity;
	
	this.controller.ReceptionPlantState( 
		new PlantStateSignal(velocity => v)	);
	} while(true);